source: appstream-generator/contrib/setup/js_tmp/Flot/examples/axes-time-zones/tz/northamerica @ 4841

Last change on this file since 4841 was 4841, checked in by Juanma, 2 years ago

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1# <pre>
2# This file is in the public domain, so clarified as of
3# 2009-05-17 by Arthur David Olson.
4
5# also includes Central America and the Caribbean
6
7# This data is by no means authoritative; if you think you know better,
8# go ahead and edit the file (and please send any changes to
9# tz@iana.org for general use in the future).
10
11# From Paul Eggert (1999-03-22):
12# A reliable and entertaining source about time zones is
13# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
14
15###############################################################################
16
17# United States
18
19# From Paul Eggert (1999-03-31):
20# Howse writes (pp 121-125) that time zones were invented by
21# Professor Charles Ferdinand Dowd (1825-1904),
22# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY).
23# His pamphlet ``A System of National Time for Railroads'' (1870)
24# was the result of his proposals at the Convention of Railroad Trunk Lines
25# in New York City (1869-10).  His 1870 proposal was based on Washington, DC,
26# but in 1872-05 he moved the proposed origin to Greenwich.
27# His proposal was adopted by the railroads on 1883-11-18 at 12:00,
28# and the most of the country soon followed suit.
29
30# From Paul Eggert (2005-04-16):
31# That 1883 transition occurred at 12:00 new time, not at 12:00 old time.
32# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005).
33
34# From Paul Eggert (2006-03-22):
35# A good source for time zone historical data in the US is
36# Thomas G. Shanks, The American Atlas (5th edition),
37# San Diego: ACS Publications, Inc. (1991).
38# Make sure you have the errata sheet; the book is somewhat useless without it.
39# It is the source for most of the pre-1991 US entries below.
40
41# From Paul Eggert (2001-03-06):
42# Daylight Saving Time was first suggested as a joke by Benjamin Franklin
43# in his whimsical essay ``An Economical Project for Diminishing the Cost
44# of Light'' published in the Journal de Paris (1784-04-26).
45# Not everyone is happy with the results:
46#
47#       I don't really care how time is reckoned so long as there is some
48#       agreement about it, but I object to being told that I am saving
49#       daylight when my reason tells me that I am doing nothing of the kind.
50#       I even object to the implication that I am wasting something
51#       valuable if I stay in bed after the sun has risen.  As an admirer
52#       of moonlight I resent the bossy insistence of those who want to
53#       reduce my time for enjoying it.  At the back of the Daylight Saving
54#       scheme I detect the bony, blue-fingered hand of Puritanism, eager
55#       to push people into bed earlier, and get them up earlier, to make
56#       them healthy, wealthy and wise in spite of themselves.
57#
58#       -- Robertson Davies, The diary of Samuel Marchbanks,
59#          Clarke, Irwin (1947), XIX, Sunday
60#
61# For more about the first ten years of DST in the United States, see
62# Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html">
63# Ten years of daylight saving from the Pittsburgh standpoint
64# (Carnegie Library of Pittsburgh, 1927)</a>.
65#
66# Shanks says that DST was called "War Time" in the US in 1918 and 1919.
67# However, DST was imposed by the Standard Time Act of 1918, which
68# was the first nationwide legal time standard, and apparently
69# time was just called "Standard Time" or "Daylight Saving Time".
70
71# From Arthur David Olson:
72# US Daylight Saving Time ended on the last Sunday of *October* in 1974.
73# See, for example, the front page of the Saturday, 1974-10-26
74# and Sunday, 1974-10-27 editions of the Washington Post.
75
76# From Arthur David Olson:
77# Before the Uniform Time Act of 1966 took effect in 1967, observance of
78# Daylight Saving Time in the US was by local option, except during wartime.
79
80# From Arthur David Olson (2000-09-25):
81# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama.
82# In the introduction, Oboler spoke of "Eastern Peace Time."
83# An AltaVista search turned up
84# <a href="http://rowayton.org/rhs/hstaug45.html">:
85# "When the time is announced over the radio now, it is 'Eastern Peace
86# Time' instead of the old familiar 'Eastern War Time.'  Peace is wonderful."
87# </a> (August 1945) by way of confirmation.
88
89# From Joseph Gallant citing
90# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):
91# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set
92# to switch to London for Attlee's address, but the American people
93# never got to hear his speech live. According to one press account,
94# CBS' Bob Trout was first to announce the word of Japan's surrender,
95# but a few seconds later, NBC, ABC and Mutual also flashed the word
96# of surrender, all of whom interrupting the bells of Big Ben in
97# London which were to precede Mr. Attlee's speech.
98
99# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout.  From
100# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times:
101#
102# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender.
103# Any announcement from Asia would reach St. John's New York newsroom on a
104# wire service teletype machine, which had prescribed signals for major news.
105# Associated Press, for example, would ring five bells before spewing out
106# typed copy of an important story, and 10 bells for news "of transcendental
107# importance."
108#
109# On Aug. 14, stalling while talking steadily into the NBC networks' open
110# microphone, St. John heard five bells and waited only to hear a sixth bell,
111# before announcing confidently: "Ladies and gentlemen, World War II is over.
112# The Japanese have agreed to our surrender terms."
113#
114# He had scored a 20-second scoop on other broadcasters.
115
116# From Arthur David Olson (2005-08-22):
117# Paul has been careful to use the "US" rules only in those locations
118# that are part of the United States; this reflects the real scope of
119# U.S. government action.  So even though the "US" rules have changed
120# in the latest release, other countries won't be affected.
121
122# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
123Rule    US      1918    1919    -       Mar     lastSun 2:00    1:00    D
124Rule    US      1918    1919    -       Oct     lastSun 2:00    0       S
125Rule    US      1942    only    -       Feb     9       2:00    1:00    W # War
126Rule    US      1945    only    -       Aug     14      23:00u  1:00    P # Peace
127Rule    US      1945    only    -       Sep     30      2:00    0       S
128Rule    US      1967    2006    -       Oct     lastSun 2:00    0       S
129Rule    US      1967    1973    -       Apr     lastSun 2:00    1:00    D
130Rule    US      1974    only    -       Jan     6       2:00    1:00    D
131Rule    US      1975    only    -       Feb     23      2:00    1:00    D
132Rule    US      1976    1986    -       Apr     lastSun 2:00    1:00    D
133Rule    US      1987    2006    -       Apr     Sun>=1  2:00    1:00    D
134Rule    US      2007    max     -       Mar     Sun>=8  2:00    1:00    D
135Rule    US      2007    max     -       Nov     Sun>=1  2:00    0       S
136
137# From Arthur David Olson, 2005-12-19
138# We generate the files specified below to guard against old files with
139# obsolete information being left in the time zone binary directory.
140# We limit the list to names that have appeared in previous versions of
141# this time zone package.
142# We do these as separate Zones rather than as Links to avoid problems if
143# a particular place changes whether it observes DST.
144# We put these specifications here in the northamerica file both to
145# increase the chances that they'll actually get compiled and to
146# avoid the need to duplicate the US rules in another file.
147
148# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
149Zone    EST              -5:00  -       EST
150Zone    MST              -7:00  -       MST
151Zone    HST             -10:00  -       HST
152Zone    EST5EDT          -5:00  US      E%sT
153Zone    CST6CDT          -6:00  US      C%sT
154Zone    MST7MDT          -7:00  US      M%sT
155Zone    PST8PDT          -8:00  US      P%sT
156
157# From Bob Devine (1988-01-28):
158# ...Alaska (and Hawaii) had the timezone names changed in 1967.
159#    old                         new
160#    Pacific Standard Time(PST)  -same-
161#    Yukon Standard Time(YST)    -same-
162#    Central Alaska S.T. (CAT)   Alaska-Hawaii St[an]dard Time (AHST)
163#    Nome Standard Time (NT)     Bering Standard Time (BST)
164#
165# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz.
166#    The YST zone now covers nearly all of the state, AHST just part
167#    of the Aleutian islands.   No DST.
168
169# From Paul Eggert (1995-12-19):
170# The tables below use `NST', not `NT', for Nome Standard Time.
171# I invented `CAWT' for Central Alaska War Time.
172
173# From U. S. Naval Observatory (1989-01-19):
174# USA  EASTERN       5 H  BEHIND UTC    NEW YORK, WASHINGTON
175# USA  EASTERN       4 H  BEHIND UTC    APR 3 - OCT 30
176# USA  CENTRAL       6 H  BEHIND UTC    CHICAGO, HOUSTON
177# USA  CENTRAL       5 H  BEHIND UTC    APR 3 - OCT 30
178# USA  MOUNTAIN      7 H  BEHIND UTC    DENVER
179# USA  MOUNTAIN      6 H  BEHIND UTC    APR 3 - OCT 30
180# USA  PACIFIC       8 H  BEHIND UTC    L.A., SAN FRANCISCO
181# USA  PACIFIC       7 H  BEHIND UTC    APR 3 - OCT 30
182# USA  ALASKA STD    9 H  BEHIND UTC    MOST OF ALASKA     (AKST)
183# USA  ALASKA STD    8 H  BEHIND UTC    APR 3 - OCT 30 (AKDT)
184# USA  ALEUTIAN     10 H  BEHIND UTC    ISLANDS WEST OF 170W
185# USA  - " -         9 H  BEHIND UTC    APR 3 - OCT 30
186# USA  HAWAII       10 H  BEHIND UTC
187# USA  BERING       11 H  BEHIND UTC    SAMOA, MIDWAY
188
189# From Arthur David Olson (1989-01-21):
190# The above dates are for 1988.
191# Note the "AKST" and "AKDT" abbreviations, the claim that there's
192# no DST in Samoa, and the claim that there is DST in Alaska and the
193# Aleutians.
194
195# From Arthur David Olson (1988-02-13):
196# Legal standard time zone names, from United States Code (1982 Edition and
197# Supplement III), Title 15, Chapter 6, Section 260 and forward.  First, names
198# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966
199# took effect), as explained in sections 263 and 261:
200#       (none)
201#       United States standard eastern time
202#       United States standard mountain time
203#       United States standard central time
204#       United States standard Pacific time
205#       (none)
206#       United States standard Alaska time
207#       (none)
208# Next, names from 1967-04-01 until 1983-11-30 (the date for
209# public law 98-181):
210#       Atlantic standard time
211#       eastern standard time
212#       central standard time
213#       mountain standard time
214#       Pacific standard time
215#       Yukon standard time
216#       Alaska-Hawaii standard time
217#       Bering standard time
218# And after 1983-11-30:
219#       Atlantic standard time
220#       eastern standard time
221#       central standard time
222#       mountain standard time
223#       Pacific standard time
224#       Alaska standard time
225#       Hawaii-Aleutian standard time
226#       Samoa standard time
227# The law doesn't give abbreviations.
228#
229# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow:
230# Public law 106-564 (2000-12-23) introduced the abbreviation
231# "Chamorro Standard Time" for time in Guam and the Northern Marianas.
232# See the file "australasia".
233
234# From Arthur David Olson, 2005-08-09
235# The following was signed into law on 2005-08-08.
236#
237# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS.
238#   (a) Amendment- Section 3(a) of the Uniform Time Act of 1966 (15
239#   U.S.C. 260a(a)) is amended--
240#     (1) by striking `first Sunday of April' and inserting `second
241#     Sunday of March'; and
242#     (2) by striking `last Sunday of October' and inserting `first
243#     Sunday of November'.
244#   (b) Effective Date- Subsection (a) shall take effect 1 year after the
245#   date of enactment of this Act or March 1, 2007, whichever is later.
246#   (c) Report to Congress- Not later than 9 months after the effective
247#   date stated in subsection (b), the Secretary shall report to Congress
248#   on the impact of this section on energy consumption in the United
249#   States.
250#   (d) Right to Revert- Congress retains the right to revert the
251#   Daylight Saving Time back to the 2005 time schedules once the
252#   Department study is complete.
253
254# US eastern time, represented by New York
255
256# Connecticut, Delaware, District of Columbia, most of Florida,
257# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky
258# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts,
259# New Hampshire, New Jersey, New York, North Carolina, Ohio,
260# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee,
261# Vermont, Virginia, West Virginia
262
263# From Dave Cantor (2004-11-02):
264# Early this summer I had the occasion to visit the Mount Washington
265# Observatory weather station atop (of course!) Mount Washington [, NH]....
266# One of the staff members said that the station was on Eastern Standard Time
267# and didn't change their clocks for Daylight Saving ... so that their
268# reports will always have times which are 5 hours behind UTC.
269
270# From Paul Eggert (2005-08-26):
271# According to today's Huntsville Times
272# <http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1>
273# a few towns on Alabama's "eastern border with Georgia, such as Phenix City
274# in Russell County, Lanett in Chambers County and some towns in Lee County,
275# set their watches and clocks on Eastern time."  It quotes H.H. "Bubba"
276# Roberts, city administrator in Phenix City. as saying "We are in the Central
277# time zone, but we do go by the Eastern time zone because so many people work
278# in Columbus."
279
280# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
281Rule    NYC     1920    only    -       Mar     lastSun 2:00    1:00    D
282Rule    NYC     1920    only    -       Oct     lastSun 2:00    0       S
283Rule    NYC     1921    1966    -       Apr     lastSun 2:00    1:00    D
284Rule    NYC     1921    1954    -       Sep     lastSun 2:00    0       S
285Rule    NYC     1955    1966    -       Oct     lastSun 2:00    0       S
286# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
287Zone America/New_York   -4:56:02 -      LMT     1883 Nov 18 12:03:58
288                        -5:00   US      E%sT    1920
289                        -5:00   NYC     E%sT    1942
290                        -5:00   US      E%sT    1946
291                        -5:00   NYC     E%sT    1967
292                        -5:00   US      E%sT
293
294# US central time, represented by Chicago
295
296# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia,
297# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and
298# Washington counties), Illinois, western Indiana
299# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
300# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western
301# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern
302# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota,
303# western Tennessee, most of Texas, Wisconsin
304
305# From Larry M. Smith (2006-04-26) re Wisconsin:
306# http://www.legis.state.wi.us/statutes/Stat0175.pdf ...
307# is currently enforced at the 01:00 time of change.  Because the local
308# "bar time" in the state corresponds to 02:00, a number of citations
309# are issued for the "sale of class 'B' alcohol after prohibited
310# hours" within the deviated hour of this change every year....
311#
312# From Douglas R. Bomberg (2007-03-12):
313# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI
314# Statue 175 closer in synch with the US Congress' intent....
315# http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf
316
317# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
318Rule    Chicago 1920    only    -       Jun     13      2:00    1:00    D
319Rule    Chicago 1920    1921    -       Oct     lastSun 2:00    0       S
320Rule    Chicago 1921    only    -       Mar     lastSun 2:00    1:00    D
321Rule    Chicago 1922    1966    -       Apr     lastSun 2:00    1:00    D
322Rule    Chicago 1922    1954    -       Sep     lastSun 2:00    0       S
323Rule    Chicago 1955    1966    -       Oct     lastSun 2:00    0       S
324# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
325Zone America/Chicago    -5:50:36 -      LMT     1883 Nov 18 12:09:24
326                        -6:00   US      C%sT    1920
327                        -6:00   Chicago C%sT    1936 Mar  1 2:00
328                        -5:00   -       EST     1936 Nov 15 2:00
329                        -6:00   Chicago C%sT    1942
330                        -6:00   US      C%sT    1946
331                        -6:00   Chicago C%sT    1967
332                        -6:00   US      C%sT
333# Oliver County, ND switched from mountain to central time on 1992-10-25.
334Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48
335                        -7:00   US      M%sT    1992 Oct 25 02:00
336                        -6:00   US      C%sT
337# Morton County, ND, switched from mountain to central time on
338# 2003-10-26, except for the area around Mandan which was already central time.
339# See <http://dmses.dot.gov/docimages/p63/135818.pdf>.
340# Officially this switch also included part of Sioux County, and
341# Jones, Mellette, and Todd Counties in South Dakota;
342# but in practice these other counties were already observing central time.
343# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>.
344Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21
345                        -7:00   US      M%sT    2003 Oct 26 02:00
346                        -6:00   US      C%sT
347
348# From Josh Findley (2011-01-21):
349# ...it appears that Mercer County, North Dakota, changed from the
350# mountain time zone to the central time zone at the last transition from
351# daylight-saving to standard time (on Nov. 7, 2010):
352# <a href="http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm">
353# http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm
354# </a>
355# <a href="http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html">
356# http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html
357# </a>
358
359# From Andy Lipscomb (2011-01-24):
360# ...according to the Census Bureau, the largest city is Beulah (although
361# it's commonly referred to as Beulah-Hazen, with Hazen being the next
362# largest city in Mercer County).  Google Maps places Beulah's city hall
363# at 4715'51" north, 10146'40" west, which yields an offset of 6h47'07".
364
365Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53
366                        -7:00   US      M%sT    2010 Nov  7 2:00
367                        -6:00   US      C%sT
368
369# US mountain time, represented by Denver
370#
371# Colorado, far western Kansas, Montana, western
372# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City),
373# New Mexico, southwestern North Dakota,
374# western South Dakota, far western Texas (El Paso County, Hudspeth County,
375# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming
376#
377# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
378Rule    Denver  1920    1921    -       Mar     lastSun 2:00    1:00    D
379Rule    Denver  1920    only    -       Oct     lastSun 2:00    0       S
380Rule    Denver  1921    only    -       May     22      2:00    0       S
381Rule    Denver  1965    1966    -       Apr     lastSun 2:00    1:00    D
382Rule    Denver  1965    1966    -       Oct     lastSun 2:00    0       S
383# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
384Zone America/Denver     -6:59:56 -      LMT     1883 Nov 18 12:00:04
385                        -7:00   US      M%sT    1920
386                        -7:00   Denver  M%sT    1942
387                        -7:00   US      M%sT    1946
388                        -7:00   Denver  M%sT    1967
389                        -7:00   US      M%sT
390
391# US Pacific time, represented by Los Angeles
392#
393# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater,
394# Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties,
395# and the northern three-quarters of Idaho county),
396# most of Nevada, most of Oregon, and Washington
397#
398# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
399Rule    CA      1948    only    -       Mar     14      2:00    1:00    D
400Rule    CA      1949    only    -       Jan      1      2:00    0       S
401Rule    CA      1950    1966    -       Apr     lastSun 2:00    1:00    D
402Rule    CA      1950    1961    -       Sep     lastSun 2:00    0       S
403Rule    CA      1962    1966    -       Oct     lastSun 2:00    0       S
404# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
405Zone America/Los_Angeles -7:52:58 -     LMT     1883 Nov 18 12:07:02
406                        -8:00   US      P%sT    1946
407                        -8:00   CA      P%sT    1967
408                        -8:00   US      P%sT
409
410# Alaska
411# AK%sT is the modern abbreviation for -9:00 per USNO.
412#
413# From Paul Eggert (2001-05-30):
414# Howse writes that Alaska switched from the Julian to the Gregorian calendar,
415# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
416# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian,
417# also a Friday.  Include only the time zone part of this transition,
418# ignoring the switch from Julian to Gregorian, since we can't represent
419# the Julian calendar.
420#
421# As far as we know, none of the exact locations mentioned below were
422# permanently inhabited in 1867 by anyone using either calendar.
423# (Yakutat was colonized by the Russians in 1799, but the settlement
424# was destroyed in 1805 by a Yakutat-kon war party.)  However, there
425# were nearby inhabitants in some cases and for our purposes perhaps
426# it's best to simply use the official transition.
427#
428
429# From Steve Ferguson (2011-01-31):
430# The author lives in Alaska and many of the references listed are only
431# available to Alaskan residents.
432#
433# <a href="http://www.alaskahistoricalsociety.org/index.cfm?section=discover%20alaska&page=Glimpses%20of%20the%20Past&viewpost=2&ContentId=98">
434# http://www.alaskahistoricalsociety.org/index.cfm?section=discover%20alaska&page=Glimpses%20of%20the%20Past&viewpost=2&ContentId=98
435# </a>
436
437# From Arthur David Olson (2011-02-01):
438# Here's database-relevant material from the 2001 "Alaska History" article:
439#
440# On September 20 [1979]...DOT...officials decreed that on April 27,
441# 1980, Juneau and other nearby communities would move to Yukon Time.
442# Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on
443# Pacific Time.
444#
445# ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the
446# Department's September 1979 decision. Juneau and other communities in
447# northern Southeast reverted to Pacific Time on October 26.
448#
449# On October 28 [1983]...the Metlakatla Indian Community Council voted
450# unanimously to keep the reservation on Pacific Time.
451#
452# According to DOT official Joanne Petrie, Indian reservations are not
453# bound to follow time zones imposed by neighboring jurisdictions.
454#
455# (The last is consistent with how the database now handles the Navajo
456# Nation.)
457
458# From Arthur David Olson (2011-02-09):
459# I just spoke by phone with a staff member at the Metlakatla Indian
460# Community office (using contact information available at
461# <a href="http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla">
462# http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla
463# </a>).
464# It's shortly after 1:00 here on the east coast of the United States;
465# the staffer said it was shortly after 10:00 there. When I asked whether
466# that meant they were on Pacific time, they said no--they were on their
467# own time. I asked about daylight saving; they said it wasn't used. I
468# did not inquire about practices in the past.
469
470# From Arthur David Olson (2011-08-17):
471# For lack of better information, assume that Metlakatla's
472# abandonment of use of daylight saving resulted from the 1983 vote.
473
474# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
475Zone America/Juneau      15:02:19 -     LMT     1867 Oct 18
476                         -8:57:41 -     LMT     1900 Aug 20 12:00
477                         -8:00  -       PST     1942
478                         -8:00  US      P%sT    1946
479                         -8:00  -       PST     1969
480                         -8:00  US      P%sT    1980 Apr 27 2:00
481                         -9:00  US      Y%sT    1980 Oct 26 2:00
482                         -8:00  US      P%sT    1983 Oct 30 2:00
483                         -9:00  US      Y%sT    1983 Nov 30
484                         -9:00  US      AK%sT
485Zone America/Sitka       14:58:47 -     LMT     1867 Oct 18
486                         -9:01:13 -     LMT     1900 Aug 20 12:00
487                         -8:00  -       PST     1942
488                         -8:00  US      P%sT    1946
489                         -8:00  -       PST     1969
490                         -8:00  US      P%sT    1983 Oct 30 2:00
491                         -9:00  US      Y%sT    1983 Nov 30
492                         -9:00  US      AK%sT
493Zone America/Metlakatla  15:13:42 -     LMT     1867 Oct 18
494                         -8:46:18 -     LMT     1900 Aug 20 12:00
495                         -8:00  -       PST     1942
496                         -8:00  US      P%sT    1946
497                         -8:00  -       PST     1969
498                         -8:00  US      P%sT    1983 Oct 30 2:00
499                         -8:00  -       MeST
500Zone America/Yakutat     14:41:05 -     LMT     1867 Oct 18
501                         -9:18:55 -     LMT     1900 Aug 20 12:00
502                         -9:00  -       YST     1942
503                         -9:00  US      Y%sT    1946
504                         -9:00  -       YST     1969
505                         -9:00  US      Y%sT    1983 Nov 30
506                         -9:00  US      AK%sT
507Zone America/Anchorage   14:00:24 -     LMT     1867 Oct 18
508                         -9:59:36 -     LMT     1900 Aug 20 12:00
509                        -10:00  -       CAT     1942
510                        -10:00  US      CAT/CAWT 1945 Aug 14 23:00u
511                        -10:00  US      CAT/CAPT 1946 # Peace
512                        -10:00  -       CAT     1967 Apr
513                        -10:00  -       AHST    1969
514                        -10:00  US      AH%sT   1983 Oct 30 2:00
515                         -9:00  US      Y%sT    1983 Nov 30
516                         -9:00  US      AK%sT
517Zone America/Nome        12:58:21 -     LMT     1867 Oct 18
518                        -11:01:38 -     LMT     1900 Aug 20 12:00
519                        -11:00  -       NST     1942
520                        -11:00  US      N%sT    1946
521                        -11:00  -       NST     1967 Apr
522                        -11:00  -       BST     1969
523                        -11:00  US      B%sT    1983 Oct 30 2:00
524                         -9:00  US      Y%sT    1983 Nov 30
525                         -9:00  US      AK%sT
526Zone America/Adak        12:13:21 -     LMT     1867 Oct 18
527                        -11:46:38 -     LMT     1900 Aug 20 12:00
528                        -11:00  -       NST     1942
529                        -11:00  US      N%sT    1946
530                        -11:00  -       NST     1967 Apr
531                        -11:00  -       BST     1969
532                        -11:00  US      B%sT    1983 Oct 30 2:00
533                        -10:00  US      AH%sT   1983 Nov 30
534                        -10:00  US      HA%sT
535# The following switches don't quite make our 1970 cutoff.
536#
537# Shanks writes that part of southwest Alaska (e.g. Aniak)
538# switched from -11:00 to -10:00 on 1968-09-22 at 02:00,
539# and another part (e.g. Akiak) made the same switch five weeks later.
540#
541# From David Flater (2004-11-09):
542# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska
543# Historic Preservation Commission, provided this information, which
544# suggests that Unalaska deviated from statutory time from early 1967
545# possibly until 1983:
546#
547#  Minutes of the Unalaska City Council Meeting, January 10, 1967:
548#  "Except for St. Paul and Akutan, Unalaska is the only important
549#  location not on Alaska Standard Time.  The following resolution was
550#  made by William Robinson and seconded by Henry Swanson:  Be it
551#  resolved that the City of Unalaska hereby goes to Alaska Standard
552#  Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday,
553#  January 14, Alaska Standard Time.)  This resolution was passed with
554#  three votes for and one against."
555
556# Hawaii
557
558# From Arthur David Olson (2010-12-09):
559# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225
560# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09,
561# the article is available at
562# <a href="http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf">
563# http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf
564# </a>
565# and indicates that standard time was adopted effective noon, January
566# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight
567# saving for the period between the last Sunday of each April and the
568# last Sunday of each September, but less than a month later repealed the
569# act," (page 220), that year-round daylight saving time was in effect
570# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for
571# when clocks changed) and that clocks were changed by 30 minutes
572# effective the second Sunday of June, 1947 (page 219, with no time of
573# day given for when clocks changed). A footnote for the 1933 changes
574# cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933)
575# and Act 163 (approved 21 May 1933)."
576
577# From Arthur David Olson (2011-01-19):
578# The following is from "Laws of the Territory of Hawaii Passed by the
579# Seventeenth Legislature: Regular Session 1933," available (as of
580# 2011-01-19) at American University's Pence Law Library. Page 85: "Act
581# 90...At 2 o'clock ante meridian of the last Sunday in April of each
582# year, the standard time of this Territory shall be advanced one
583# hour...This Act shall take effect upon its approval. Approved this 26th
584# day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of
585# Hawaii." Page 172:  "Act 163...Act 90 of the Session Laws of 1933 is
586# hereby repealed...This Act shall take effect upon its approval, upon
587# which date the standard time of this Territory shall be restored to
588# that existing immediately prior to the taking effect of said Act 90.
589# Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor
590# of the Territory of Hawaii."
591#
592# Note that 1933-05-21 was a Sunday.
593# We're left to guess the time of day when Act 163 was approved; guess noon.
594
595Zone Pacific/Honolulu   -10:31:26 -     LMT     1896 Jan 13 12:00 #Schmitt&Cox
596                        -10:30  -       HST     1933 Apr 30 2:00 #Laws 1933
597                        -10:30  1:00    HDT     1933 May 21 12:00 #Laws 1933+12
598                        -10:30  -       HST     1942 Feb 09 2:00 #Schmitt&Cox+2
599                        -10:30  1:00    HDT     1945 Sep 30 2:00 #Schmitt&Cox+2
600                        -10:30  -       HST     1947 Jun  8 2:00 #Schmitt&Cox+2
601                        -10:00  -       HST
602
603# Now we turn to US areas that have diverged from the consensus since 1970.
604
605# Arizona mostly uses MST.
606
607# From Paul Eggert (2002-10-20):
608#
609# The information in the rest of this paragraph is derived from the
610# <a href="http://www.dlapr.lib.az.us/links/daylight.htm">
611# Daylight Saving Time web page (2002-01-23)</a> maintained by the
612# Arizona State Library, Archives and Public Records.
613# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard
614# time, but by federal law railroads, airlines, bus lines, military
615# personnel, and some engaged in interstate commerce continued to
616# observe war (i.e., daylight saving) time.  The 1944-03-17 Phoenix
617# Gazette says that was the date the law changed, and that 04-01 was
618# the date the state's clocks would change.  In 1945 the State of
619# Arizona used standard time all year, again with exceptions only as
620# mandated by federal law.  Arizona observed DST in 1967, but Arizona
621# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST.
622#
623# Shanks says the 1944 experiment came to an end on 1944-03-17.
624# Go with the Arizona State Library instead.
625
626Zone America/Phoenix    -7:28:18 -      LMT     1883 Nov 18 11:31:42
627                        -7:00   US      M%sT    1944 Jan  1 00:01
628                        -7:00   -       MST     1944 Apr  1 00:01
629                        -7:00   US      M%sT    1944 Oct  1 00:01
630                        -7:00   -       MST     1967
631                        -7:00   US      M%sT    1968 Mar 21
632                        -7:00   -       MST
633# From Arthur David Olson (1988-02-13):
634# A writer from the Inter Tribal Council of Arizona, Inc.,
635# notes in private correspondence dated 1987-12-28 that "Presently, only the
636# Navajo Nation participates in the Daylight Saving Time policy, due to its
637# large size and location in three states."  (The "only" means that other
638# tribal nations don't use DST.)
639
640Link America/Denver America/Shiprock
641
642# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine,
643# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark,
644# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome,
645# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power,
646# Teton, Twin Falls, Valley, Washington counties, and the southern
647# quarter of Idaho county) and eastern Oregon (most of Malheur County)
648# switched four weeks late in 1974.
649#
650# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
651Zone America/Boise      -7:44:49 -      LMT     1883 Nov 18 12:15:11
652                        -8:00   US      P%sT    1923 May 13 2:00
653                        -7:00   US      M%sT    1974
654                        -7:00   -       MST     1974 Feb  3 2:00
655                        -7:00   US      M%sT
656
657# Indiana
658#
659# For a map of Indiana's time zone regions, see:
660# <a href="http://www.mccsc.edu/time.html">
661# What time is it in Indiana?
662# </a> (2006-03-01)
663#
664# From Paul Eggert (2007-08-17):
665# Since 1970, most of Indiana has been like America/Indiana/Indianapolis,
666# with the following exceptions:
667#
668# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
669#   Vandenburgh, and Warrick counties have been like America/Chicago.
670#
671# - Dearborn and Ohio counties have been like America/New_York.
672#
673# - Clark, Floyd, and Harrison counties have been like
674#   America/Kentucky/Louisville.
675#
676# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke,
677#   and Switzerland counties have their own time zone histories as noted below.
678#
679# Shanks partitioned Indiana into 345 regions, each with its own time history,
680# and wrote ``Even newspaper reports present contradictory information.''
681# Those Hoosiers!  Such a flighty and changeable people!
682# Fortunately, most of the complexity occurred before our cutoff date of 1970.
683#
684# Other than Indianapolis, the Indiana place names are so nondescript
685# that they would be ambiguous if we left them at the `America' level.
686# So we reluctantly put them all in a subdirectory `America/Indiana'.
687
688# From Paul Eggert (2005-08-16):
689# http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006.
690
691# From Nathan Stratton Treadway (2006-03-30):
692# http://www.dot.gov/affairs/dot0406.htm [3705 B]
693# From Deborah Goldsmith (2006-01-18):
694# http://dmses.dot.gov/docimages/pdf95/382329_web.pdf [2.9 MB]
695# From Paul Eggert (2006-01-20):
696# It says "DOT is relocating the time zone boundary in Indiana to move Starke,
697# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the
698# Eastern Time Zone to the Central Time Zone.... The effective date of
699# this rule is 2:OO a.m. EST Sunday, April 2, 2006, which is the
700# changeover date from standard time to Daylight Saving Time."
701# Strictly speaking, this means the affected counties will change their
702# clocks twice that night, but this obviously is in error.  The intent
703# is that 01:59:59 EST be followed by 02:00:00 CDT.
704
705# From Gwillim Law (2007-02-10):
706# The Associated Press has been reporting that Pulaski County, Indiana is
707# going to switch from Central to Eastern Time on March 11, 2007....
708# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL
709
710# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
711Rule Indianapolis 1941  only    -       Jun     22      2:00    1:00    D
712Rule Indianapolis 1941  1954    -       Sep     lastSun 2:00    0       S
713Rule Indianapolis 1946  1954    -       Apr     lastSun 2:00    1:00    D
714# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
715Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22
716                        -6:00   US      C%sT    1920
717                        -6:00 Indianapolis C%sT 1942
718                        -6:00   US      C%sT    1946
719                        -6:00 Indianapolis C%sT 1955 Apr 24 2:00
720                        -5:00   -       EST     1957 Sep 29 2:00
721                        -6:00   -       CST     1958 Apr 27 2:00
722                        -5:00   -       EST     1969
723                        -5:00   US      E%sT    1971
724                        -5:00   -       EST     2006
725                        -5:00   US      E%sT
726#
727# Eastern Crawford County, Indiana, left its clocks alone in 1974,
728# as well as from 1976 through 2005.
729# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
730Rule    Marengo 1951    only    -       Apr     lastSun 2:00    1:00    D
731Rule    Marengo 1951    only    -       Sep     lastSun 2:00    0       S
732Rule    Marengo 1954    1960    -       Apr     lastSun 2:00    1:00    D
733Rule    Marengo 1954    1960    -       Sep     lastSun 2:00    0       S
734# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
735Zone America/Indiana/Marengo -5:45:23 - LMT     1883 Nov 18 12:14:37
736                        -6:00   US      C%sT    1951
737                        -6:00   Marengo C%sT    1961 Apr 30 2:00
738                        -5:00   -       EST     1969
739                        -5:00   US      E%sT    1974 Jan  6 2:00
740                        -6:00   1:00    CDT     1974 Oct 27 2:00
741                        -5:00   US      E%sT    1976
742                        -5:00   -       EST     2006
743                        -5:00   US      E%sT
744#
745# Daviess, Dubois, Knox, and Martin Counties, Indiana,
746# switched from eastern to central time in April 2006, then switched back
747# in November 2007.
748# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
749Rule Vincennes  1946    only    -       Apr     lastSun 2:00    1:00    D
750Rule Vincennes  1946    only    -       Sep     lastSun 2:00    0       S
751Rule Vincennes  1953    1954    -       Apr     lastSun 2:00    1:00    D
752Rule Vincennes  1953    1959    -       Sep     lastSun 2:00    0       S
753Rule Vincennes  1955    only    -       May      1      0:00    1:00    D
754Rule Vincennes  1956    1963    -       Apr     lastSun 2:00    1:00    D
755Rule Vincennes  1960    only    -       Oct     lastSun 2:00    0       S
756Rule Vincennes  1961    only    -       Sep     lastSun 2:00    0       S
757Rule Vincennes  1962    1963    -       Oct     lastSun 2:00    0       S
758# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
759Zone America/Indiana/Vincennes -5:50:07 - LMT   1883 Nov 18 12:09:53
760                        -6:00   US      C%sT    1946
761                        -6:00 Vincennes C%sT    1964 Apr 26 2:00
762                        -5:00   -       EST     1969
763                        -5:00   US      E%sT    1971
764                        -5:00   -       EST     2006 Apr  2 2:00
765                        -6:00   US      C%sT    2007 Nov  4 2:00
766                        -5:00   US      E%sT
767#
768# Perry County, Indiana, switched from eastern to central time in April 2006.
769# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
770Rule Perry      1946    only    -       Apr     lastSun 2:00    1:00    D
771Rule Perry      1946    only    -       Sep     lastSun 2:00    0       S
772Rule Perry      1953    1954    -       Apr     lastSun 2:00    1:00    D
773Rule Perry      1953    1959    -       Sep     lastSun 2:00    0       S
774Rule Perry      1955    only    -       May      1      0:00    1:00    D
775Rule Perry      1956    1963    -       Apr     lastSun 2:00    1:00    D
776Rule Perry      1960    only    -       Oct     lastSun 2:00    0       S
777Rule Perry      1961    only    -       Sep     lastSun 2:00    0       S
778Rule Perry      1962    1963    -       Oct     lastSun 2:00    0       S
779# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
780Zone America/Indiana/Tell_City -5:47:03 - LMT   1883 Nov 18 12:12:57
781                        -6:00   US      C%sT    1946
782                        -6:00 Perry     C%sT    1964 Apr 26 2:00
783                        -5:00   -       EST     1969
784                        -5:00   US      E%sT    1971
785                        -5:00   -       EST     2006 Apr  2 2:00
786                        -6:00   US      C%sT
787#
788# Pike County, Indiana moved from central to eastern time in 1977,
789# then switched back in 2006, then switched back again in 2007.
790# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
791Rule    Pike    1955    only    -       May      1      0:00    1:00    D
792Rule    Pike    1955    1960    -       Sep     lastSun 2:00    0       S
793Rule    Pike    1956    1964    -       Apr     lastSun 2:00    1:00    D
794Rule    Pike    1961    1964    -       Oct     lastSun 2:00    0       S
795# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
796Zone America/Indiana/Petersburg -5:49:07 - LMT  1883 Nov 18 12:10:53
797                        -6:00   US      C%sT    1955
798                        -6:00   Pike    C%sT    1965 Apr 25 2:00
799                        -5:00   -       EST     1966 Oct 30 2:00
800                        -6:00   US      C%sT    1977 Oct 30 2:00
801                        -5:00   -       EST     2006 Apr  2 2:00
802                        -6:00   US      C%sT    2007 Nov  4 2:00
803                        -5:00   US      E%sT
804#
805# Starke County, Indiana moved from central to eastern time in 1991,
806# then switched back in 2006.
807# From Arthur David Olson (1991-10-28):
808# An article on page A3 of the Sunday, 1991-10-27 Washington Post
809# notes that Starke County switched from Central time to Eastern time as of
810# 1991-10-27.
811# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
812Rule    Starke  1947    1961    -       Apr     lastSun 2:00    1:00    D
813Rule    Starke  1947    1954    -       Sep     lastSun 2:00    0       S
814Rule    Starke  1955    1956    -       Oct     lastSun 2:00    0       S
815Rule    Starke  1957    1958    -       Sep     lastSun 2:00    0       S
816Rule    Starke  1959    1961    -       Oct     lastSun 2:00    0       S
817# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
818Zone America/Indiana/Knox -5:46:30 -    LMT     1883 Nov 18 12:13:30
819                        -6:00   US      C%sT    1947
820                        -6:00   Starke  C%sT    1962 Apr 29 2:00
821                        -5:00   -       EST     1963 Oct 27 2:00
822                        -6:00   US      C%sT    1991 Oct 27 2:00
823                        -5:00   -       EST     2006 Apr  2 2:00
824                        -6:00   US      C%sT
825#
826# Pulaski County, Indiana, switched from eastern to central time in
827# April 2006 and then switched back in March 2007.
828# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
829Rule    Pulaski 1946    1960    -       Apr     lastSun 2:00    1:00    D
830Rule    Pulaski 1946    1954    -       Sep     lastSun 2:00    0       S
831Rule    Pulaski 1955    1956    -       Oct     lastSun 2:00    0       S
832Rule    Pulaski 1957    1960    -       Sep     lastSun 2:00    0       S
833# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
834Zone America/Indiana/Winamac -5:46:25 - LMT     1883 Nov 18 12:13:35
835                        -6:00   US      C%sT    1946
836                        -6:00   Pulaski C%sT    1961 Apr 30 2:00
837                        -5:00   -       EST     1969
838                        -5:00   US      E%sT    1971
839                        -5:00   -       EST     2006 Apr  2 2:00
840                        -6:00   US      C%sT    2007 Mar 11 2:00
841                        -5:00   US      E%sT
842#
843# Switzerland County, Indiana, did not observe DST from 1973 through 2005.
844# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
845Zone America/Indiana/Vevay -5:40:16 -   LMT     1883 Nov 18 12:19:44
846                        -6:00   US      C%sT    1954 Apr 25 2:00
847                        -5:00   -       EST     1969
848                        -5:00   US      E%sT    1973
849                        -5:00   -       EST     2006
850                        -5:00   US      E%sT
851
852# Part of Kentucky left its clocks alone in 1974.
853# This also includes Clark, Floyd, and Harrison counties in Indiana.
854# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
855Rule Louisville 1921    only    -       May     1       2:00    1:00    D
856Rule Louisville 1921    only    -       Sep     1       2:00    0       S
857Rule Louisville 1941    1961    -       Apr     lastSun 2:00    1:00    D
858Rule Louisville 1941    only    -       Sep     lastSun 2:00    0       S
859Rule Louisville 1946    only    -       Jun     2       2:00    0       S
860Rule Louisville 1950    1955    -       Sep     lastSun 2:00    0       S
861Rule Louisville 1956    1960    -       Oct     lastSun 2:00    0       S
862# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
863Zone America/Kentucky/Louisville -5:43:02 -     LMT     1883 Nov 18 12:16:58
864                        -6:00   US      C%sT    1921
865                        -6:00 Louisville C%sT   1942
866                        -6:00   US      C%sT    1946
867                        -6:00 Louisville C%sT   1961 Jul 23 2:00
868                        -5:00   -       EST     1968
869                        -5:00   US      E%sT    1974 Jan  6 2:00
870                        -6:00   1:00    CDT     1974 Oct 27 2:00
871                        -5:00   US      E%sT
872#
873# Wayne County, Kentucky
874#
875# From
876# <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml">
877# Lake Cumberland LIFE
878# </a> (1999-01-29) via WKYM-101.7:
879# Clinton County has joined Wayne County in asking the DoT to change from
880# the Central to the Eastern time zone....  The Wayne County government made
881# the same request in December.  And while Russell County officials have not
882# taken action, the majority of respondents to a poll conducted there in
883# August indicated they would like to change to "fast time" also.
884# The three Lake Cumberland counties are the farthest east of any U.S.
885# location in the Central time zone.
886#
887# From Rich Wales (2000-08-29):
888# After prolonged debate, and despite continuing deep differences of opinion,
889# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern
890# (-0500) time.  They won't "fall back" this year.  See Sara Shipley,
891# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400).
892#
893# From Paul Eggert (2001-07-16):
894# The final rule was published in the
895# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22">
896# Federal Register 65, 160 (2000-08-17), page 50154-50158.
897# </a>
898#
899Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36
900                        -6:00   US      C%sT    1946
901                        -6:00   -       CST     1968
902                        -6:00   US      C%sT    2000 Oct 29  2:00
903                        -5:00   US      E%sT
904
905
906# From Rives McDow (2000-08-30):
907# Here ... are all the changes in the US since 1985.
908# Kearny County, KS (put all of county on central;
909#       previously split between MST and CST) ... 1990-10
910# Starke County, IN (from CST to EST) ... 1991-10
911# Oliver County, ND (from MST to CST) ... 1992-10
912# West Wendover, NV (from PST TO MST) ... 1999-10
913# Wayne County, KY (from CST to EST) ... 2000-10
914#
915# From Paul Eggert (2001-07-17):
916# We don't know where the line used to be within Kearny County, KS,
917# so omit that change for now.
918# See America/Indiana/Knox for the Starke County, IN change.
919# See America/North_Dakota/Center for the Oliver County, ND change.
920# West Wendover, NV officially switched from Pacific to mountain time on
921# 1999-10-31.  See the
922# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15">
923# Federal Register 64, 203 (1999-10-21), page 56705-56707.
924# </a>
925# However, the Federal Register says that West Wendover already operated
926# on mountain time, and the rule merely made this official;
927# hence a separate tz entry is not needed.
928
929# Michigan
930#
931# From Bob Devine (1988-01-28):
932# Michigan didn't observe DST from 1968 to 1973.
933#
934# From Paul Eggert (1999-03-31):
935# Shanks writes that Michigan started using standard time on 1885-09-18,
936# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01)
937# that Detroit kept
938#
939#       local time until 1900 when the City Council decreed that clocks should
940#       be put back twenty-eight minutes to Central Standard Time.  Half the
941#       city obeyed, half refused.  After considerable debate, the decision
942#       was rescinded and the city reverted to Sun time.  A derisive offer to
943#       erect a sundial in front of the city hall was referred to the
944#       Committee on Sewers.  Then, in 1905, Central time was adopted
945#       by city vote.
946#
947# This story is too entertaining to be false, so go with Howse over Shanks.
948#
949# From Paul Eggert (2001-03-06):
950# Garland (1927) writes ``Cleveland and Detroit advanced their clocks
951# one hour in 1914.''  This change is not in Shanks.  We have no more
952# info, so omit this for now.
953#
954# Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
955# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
956Rule    Detroit 1948    only    -       Apr     lastSun 2:00    1:00    D
957Rule    Detroit 1948    only    -       Sep     lastSun 2:00    0       S
958Rule    Detroit 1967    only    -       Jun     14      2:00    1:00    D
959Rule    Detroit 1967    only    -       Oct     lastSun 2:00    0       S
960# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
961Zone America/Detroit    -5:32:11 -      LMT     1905
962                        -6:00   -       CST     1915 May 15 2:00
963                        -5:00   -       EST     1942
964                        -5:00   US      E%sT    1946
965                        -5:00   Detroit E%sT    1973
966                        -5:00   US      E%sT    1975
967                        -5:00   -       EST     1975 Apr 27 2:00
968                        -5:00   US      E%sT
969#
970# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan,
971# switched from EST to CST/CDT in 1973.
972# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
973Rule Menominee  1946    only    -       Apr     lastSun 2:00    1:00    D
974Rule Menominee  1946    only    -       Sep     lastSun 2:00    0       S
975Rule Menominee  1966    only    -       Apr     lastSun 2:00    1:00    D
976Rule Menominee  1966    only    -       Oct     lastSun 2:00    0       S
977# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
978Zone America/Menominee  -5:50:27 -      LMT     1885 Sep 18 12:00
979                        -6:00   US      C%sT    1946
980                        -6:00 Menominee C%sT    1969 Apr 27 2:00
981                        -5:00   -       EST     1973 Apr 29 2:00
982                        -6:00   US      C%sT
983
984# Navassa
985# administered by the US Fish and Wildlife Service
986# claimed by US under the provisions of the 1856 Guano Islands Act
987# also claimed by Haiti
988# occupied 1857/1900 by the Navassa Phosphate Co
989# US lighthouse 1917/1996-09
990# currently uninhabited
991# see Mark Fineman, ``An Isle Rich in Guano and Discord'',
992# _Los Angeles Times_ (1998-11-10), A1, A10; it cites
993# Jimmy Skaggs, _The Great Guano Rush_ (1994).
994
995################################################################################
996
997
998# From Paul Eggert (2006-03-22):
999# A good source for time zone historical data outside the U.S. is
1000# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
1001# San Diego: ACS Publications, Inc. (2003).
1002#
1003# Gwillim Law writes that a good source
1004# for recent time zone data is the International Air Transport
1005# Association's Standard Schedules Information Manual (IATA SSIM),
1006# published semiannually.  Law sent in several helpful summaries
1007# of the IATA's data after 1990.
1008#
1009# Except where otherwise noted, Shanks & Pottenger is the source for
1010# entries through 1990, and IATA SSIM is the source for entries afterwards.
1011#
1012# Other sources occasionally used include:
1013#
1014#       Edward W. Whitman, World Time Differences,
1015#       Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated),
1016#       which I found in the UCLA library.
1017#
1018#       <a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf">
1019#       William Willett, The Waste of Daylight, 19th edition
1020#       </a> (1914-03)
1021#
1022# See the `europe' file for Greenland.
1023
1024# Canada
1025
1026# From Alain LaBont<e'> (1994-11-14):
1027# I post here the time zone abbreviations standardized in Canada
1028# for both English and French in the CAN/CSA-Z234.4-89 standard....
1029#
1030#       UTC     Standard time   Daylight savings time
1031#       offset  French  English French  English
1032#       -2:30   -       -       HAT     NDT
1033#       -3      -       -       HAA     ADT
1034#       -3:30   HNT     NST     -       -
1035#       -4      HNA     AST     HAE     EDT
1036#       -5      HNE     EST     HAC     CDT
1037#       -6      HNC     CST     HAR     MDT
1038#       -7      HNR     MST     HAP     PDT
1039#       -8      HNP     PST     HAY     YDT
1040#       -9      HNY     YST     -       -
1041#
1042#       HN: Heure Normale       ST: Standard Time
1043#       HA: Heure Avanc<e'>e    DT: Daylight saving Time
1044#
1045#       A: de l'Atlantique      Atlantic
1046#       C: du Centre            Central
1047#       E: de l'Est             Eastern
1048#       M:                      Mountain
1049#       N:                      Newfoundland
1050#       P: du Pacifique         Pacific
1051#       R: des Rocheuses
1052#       T: de Terre-Neuve
1053#       Y: du Yukon             Yukon
1054#
1055# From Paul Eggert (1994-11-22):
1056# Alas, this sort of thing must be handled by localization software.
1057
1058# Unless otherwise specified, the data for Canada are all from Shanks
1059# & Pottenger.
1060
1061# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31,
1062# 2007-03-01):
1063# The British Columbia government announced yesterday that it will
1064# adjust daylight savings next year to align with changes in the
1065# U.S. and the rest of Canada....
1066# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm
1067# ...
1068# Nova Scotia
1069# Daylight saving time will be extended by four weeks starting in 2007....
1070# http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf
1071#
1072# [For New Brunswick] the new legislation dictates that the time change is to
1073# be done at 02:00 instead of 00:01.
1074# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf
1075# ...
1076# Manitoba has traditionally changed the clock every fall at 03:00.
1077# As of 2006, the transition is to take place one hour earlier at 02:00.
1078# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php
1079# ...
1080# [Alberta, Ontario, Quebec] will follow US rules.
1081# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM
1082# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm
1083# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF
1084# ...
1085# P.E.I. will follow US rules....
1086# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf
1087# ...
1088# Province of Newfoundland and Labrador....
1089# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm
1090# ...
1091# Yukon
1092# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf
1093# ...
1094# N.W.T. will follow US rules.  Whoever maintains the government web site
1095# does not seem to believe in bookmarks.  To see the news release, click the
1096# following link and search for "Daylight Savings Time Change".  Press the
1097# "Daylight Savings Time Change" link; it will fire off a popup using
1098# JavaScript.
1099# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive
1100# ...
1101# Nunavut
1102# An amendment to the Interpretation Act was registered on February 19/2007....
1103# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf
1104
1105# From Paul Eggert (2006-04-25):
1106# H. David Matthews and Mary Vincent's map
1107# <a href="http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp">
1108# "It's about TIME", _Canadian Geographic_ (September-October 1998)
1109# </a> contains detailed boundaries for regions observing nonstandard
1110# time and daylight saving time arrangements in Canada circa 1998.
1111#
1112# INMS, the Institute for National Measurement Standards in Ottawa, has <a
1113# href="http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php">
1114# information about standard and daylight saving time zones in Canada.
1115# </a> (updated periodically).
1116# Its unofficial information is often taken from Matthews and Vincent.
1117
1118# From Paul Eggert (2006-06-27):
1119# For now, assume all of DST-observing Canada will fall into line with the
1120# new US DST rules,
1121
1122# From Chris Walton (2011-12-01)
1123# In the first of Tammy Hardwick's articles
1124# <a href="http://www.ilovecreston.com/?p=articles&t=spec&ar=260">
1125# http://www.ilovecreston.com/?p=articles&t=spec&ar=260
1126# </a>
1127# she quotes the Friday November 1/1918 edition of the Creston Review.
1128# The quote includes these two statements:
1129# 'Sunday the CPR went back to the old system of time...'
1130# '... The daylight saving scheme was dropped all over Canada at the same time,'
1131# These statements refer to a transition from daylight time to standard time
1132# that occurred nationally on Sunday October 27/1918.  This transition was
1133# also documented in the Saturday October 26/1918 edition of the Toronto Star.
1134
1135# In light of that evidence, we alter the date from the earlier believed
1136# Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day
1137# than Thursday) in all Canadian rulesets.
1138
1139# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
1140Rule    Canada  1918    only    -       Apr     14      2:00    1:00    D
1141Rule    Canada  1918    only    -       Oct     27      2:00    0       S
1142Rule    Canada  1942    only    -       Feb      9      2:00    1:00    W # War
1143Rule    Canada  1945    only    -       Aug     14      23:00u  1:00    P # Peace
1144Rule    Canada  1945    only    -       Sep     30      2:00    0       S
1145Rule    Canada  1974    1986    -       Apr     lastSun 2:00    1:00    D
1146Rule    Canada  1974    2006    -       Oct     lastSun 2:00    0       S
1147Rule    Canada  1987    2006    -       Apr     Sun>=1  2:00    1:00    D
1148Rule    Canada  2007    max     -       Mar     Sun>=8  2:00    1:00    D
1149Rule    Canada  2007    max     -       Nov     Sun>=1  2:00    0       S
1150
1151
1152# Newfoundland and Labrador
1153
1154# From Paul Eggert (2000-10-02):
1155# Matthews and Vincent (1998) write that Labrador should use NST/NDT,
1156# but the only part of Labrador that follows the rules is the
1157# southeast corner, including Port Hope Simpson and Mary's Harbour,
1158# but excluding, say, Black Tickle.
1159
1160# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
1161Rule    StJohns 1917    only    -       Apr      8      2:00    1:00    D
1162Rule    StJohns 1917    only    -       Sep     17      2:00    0       S
1163# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger.
1164Rule    StJohns 1919    only    -       May      5      23:00   1:00    D
1165Rule    StJohns 1919    only    -       Aug     12      23:00   0       S
1166# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger.
1167Rule    StJohns 1920    1935    -       May     Sun>=1  23:00   1:00    D
1168Rule    StJohns 1920    1935    -       Oct     lastSun 23:00   0       S
1169# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks &
1170# Pottenger.
1171Rule    StJohns 1936    1941    -       May     Mon>=9  0:00    1:00    D
1172Rule    StJohns 1936    1941    -       Oct     Mon>=2  0:00    0       S
1173# Whitman gives the following transitions:
1174# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07
1175# but go with Shanks & Pottenger and assume they used Canadian rules.
1176# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives
1177# Apr 30 - Sep 24; go with Shanks & Pottenger.
1178Rule    StJohns 1946    1950    -       May     Sun>=8  2:00    1:00    D
1179Rule    StJohns 1946    1950    -       Oct     Sun>=2  2:00    0       S
1180Rule    StJohns 1951    1986    -       Apr     lastSun 2:00    1:00    D
1181Rule    StJohns 1951    1959    -       Sep     lastSun 2:00    0       S
1182Rule    StJohns 1960    1986    -       Oct     lastSun 2:00    0       S
1183# From Paul Eggert (2000-10-02):
1184# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches
1185# at 00:01 local time.  For now, assume it started in 1987.
1186
1187# From Michael Pelley (2011-09-12):
1188# We received today, Monday, September 12, 2011, notification that the
1189# changes to the Newfoundland Standard Time Act have been proclaimed.
1190# The change in the Act stipulates that the change from Daylight Savings
1191# Time to Standard Time and from Standard Time to Daylight Savings Time
1192# now occurs at 2:00AM.
1193# ...
1194# <a href="http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm">
1195# http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm
1196# </a>
1197# ...
1198# MICHAEL PELLEY  |  Manager of Enterprise Architecture - Solution Delivery
1199# Office of the Chief Information Officer
1200# Executive Council
1201# Government of Newfoundland & Labrador
1202
1203Rule    StJohns 1987    only    -       Apr     Sun>=1  0:01    1:00    D
1204Rule    StJohns 1987    2006    -       Oct     lastSun 0:01    0       S
1205Rule    StJohns 1988    only    -       Apr     Sun>=1  0:01    2:00    DD
1206Rule    StJohns 1989    2006    -       Apr     Sun>=1  0:01    1:00    D
1207Rule    StJohns 2007    2011    -       Mar     Sun>=8  0:01    1:00    D
1208Rule    StJohns 2007    2010    -       Nov     Sun>=1  0:01    0       S
1209#
1210# St John's has an apostrophe, but Posix file names can't have apostrophes.
1211# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1212Zone America/St_Johns   -3:30:52 -      LMT     1884
1213                        -3:30:52 StJohns N%sT   1918
1214                        -3:30:52 Canada N%sT    1919
1215                        -3:30:52 StJohns N%sT   1935 Mar 30
1216                        -3:30   StJohns N%sT    1942 May 11
1217                        -3:30   Canada  N%sT    1946
1218                        -3:30   StJohns N%sT    2011 Nov
1219                        -3:30   Canada  N%sT
1220
1221# most of east Labrador
1222
1223# The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'.
1224# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1225Zone America/Goose_Bay  -4:01:40 -      LMT     1884 # Happy Valley-Goose Bay
1226                        -3:30:52 -      NST     1918
1227                        -3:30:52 Canada N%sT    1919
1228                        -3:30:52 -      NST     1935 Mar 30
1229                        -3:30   -       NST     1936
1230                        -3:30   StJohns N%sT    1942 May 11
1231                        -3:30   Canada  N%sT    1946
1232                        -3:30   StJohns N%sT    1966 Mar 15 2:00
1233                        -4:00   StJohns A%sT    2011 Nov
1234                        -4:00   Canada  A%sT
1235
1236
1237# west Labrador, Nova Scotia, Prince Edward I
1238
1239# From Paul Eggert (2006-03-22):
1240# Shanks & Pottenger write that since 1970 most of this region has been like
1241# Halifax.  Many locales did not observe peacetime DST until 1972;
1242# Glace Bay, NS is the largest that we know of.
1243# Shanks & Pottenger also write that Liverpool, NS was the only town
1244# in Canada to observe DST in 1971 but not 1970; for now we'll assume
1245# this is a typo.
1246
1247# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
1248Rule    Halifax 1916    only    -       Apr      1      0:00    1:00    D
1249Rule    Halifax 1916    only    -       Oct      1      0:00    0       S
1250Rule    Halifax 1920    only    -       May      9      0:00    1:00    D
1251Rule    Halifax 1920    only    -       Aug     29      0:00    0       S
1252Rule    Halifax 1921    only    -       May      6      0:00    1:00    D
1253Rule    Halifax 1921    1922    -       Sep      5      0:00    0       S
1254Rule    Halifax 1922    only    -       Apr     30      0:00    1:00    D
1255Rule    Halifax 1923    1925    -       May     Sun>=1  0:00    1:00    D
1256Rule    Halifax 1923    only    -       Sep      4      0:00    0       S
1257Rule    Halifax 1924    only    -       Sep     15      0:00    0       S
1258Rule    Halifax 1925    only    -       Sep     28      0:00    0       S
1259Rule    Halifax 1926    only    -       May     16      0:00    1:00    D
1260Rule    Halifax 1926    only    -       Sep     13      0:00    0       S
1261Rule    Halifax 1927    only    -       May      1      0:00    1:00    D
1262Rule    Halifax 1927    only    -       Sep     26      0:00    0       S
1263Rule    Halifax 1928    1931    -       May     Sun>=8  0:00    1:00    D
1264Rule    Halifax 1928    only    -       Sep      9      0:00    0       S
1265Rule    Halifax 1929    only    -       Sep      3      0:00    0       S
1266Rule    Halifax 1930    only    -       Sep     15      0:00    0       S
1267Rule    Halifax 1931    1932    -       Sep     Mon>=24 0:00    0       S
1268Rule    Halifax 1932    only    -       May      1      0:00    1:00    D
1269Rule    Halifax 1933    only    -       Apr     30      0:00    1:00    D
1270Rule    Halifax 1933    only    -       Oct      2      0:00    0       S
1271Rule    Halifax 1934    only    -       May     20      0:00    1:00    D
1272Rule    Halifax 1934    only    -       Sep     16      0:00    0       S
1273Rule    Halifax 1935    only    -       Jun      2      0:00    1:00    D
1274Rule    Halifax 1935    only    -       Sep     30      0:00    0       S
1275Rule    Halifax 1936    only    -       Jun      1      0:00    1:00    D
1276Rule    Halifax 1936    only    -       Sep     14      0:00    0       S
1277Rule    Halifax 1937    1938    -       May     Sun>=1  0:00    1:00    D
1278Rule    Halifax 1937    1941    -       Sep     Mon>=24 0:00    0       S
1279Rule    Halifax 1939    only    -       May     28      0:00    1:00    D
1280Rule    Halifax 1940    1941    -       May     Sun>=1  0:00    1:00    D
1281Rule    Halifax 1946    1949    -       Apr     lastSun 2:00    1:00    D
1282Rule    Halifax 1946    1949    -       Sep     lastSun 2:00    0       S
1283Rule    Halifax 1951    1954    -       Apr     lastSun 2:00    1:00    D
1284Rule    Halifax 1951    1954    -       Sep     lastSun 2:00    0       S
1285Rule    Halifax 1956    1959    -       Apr     lastSun 2:00    1:00    D
1286Rule    Halifax 1956    1959    -       Sep     lastSun 2:00    0       S
1287Rule    Halifax 1962    1973    -       Apr     lastSun 2:00    1:00    D
1288Rule    Halifax 1962    1973    -       Oct     lastSun 2:00    0       S
1289# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1290Zone America/Halifax    -4:14:24 -      LMT     1902 Jun 15
1291                        -4:00   Halifax A%sT    1918
1292                        -4:00   Canada  A%sT    1919
1293                        -4:00   Halifax A%sT    1942 Feb  9 2:00s
1294                        -4:00   Canada  A%sT    1946
1295                        -4:00   Halifax A%sT    1974
1296                        -4:00   Canada  A%sT
1297Zone America/Glace_Bay  -3:59:48 -      LMT     1902 Jun 15
1298                        -4:00   Canada  A%sT    1953
1299                        -4:00   Halifax A%sT    1954
1300                        -4:00   -       AST     1972
1301                        -4:00   Halifax A%sT    1974
1302                        -4:00   Canada  A%sT
1303
1304# New Brunswick
1305
1306# From Paul Eggert (2007-01-31):
1307# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf>
1308# says they changed at 00:01 through 2006, and
1309# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it
1310# clear that this was the case since at least 1993.
1311# For now, assume it started in 1993.
1312
1313# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
1314Rule    Moncton 1933    1935    -       Jun     Sun>=8  1:00    1:00    D
1315Rule    Moncton 1933    1935    -       Sep     Sun>=8  1:00    0       S
1316Rule    Moncton 1936    1938    -       Jun     Sun>=1  1:00    1:00    D
1317Rule    Moncton 1936    1938    -       Sep     Sun>=1  1:00    0       S
1318Rule    Moncton 1939    only    -       May     27      1:00    1:00    D
1319Rule    Moncton 1939    1941    -       Sep     Sat>=21 1:00    0       S
1320Rule    Moncton 1940    only    -       May     19      1:00    1:00    D
1321Rule    Moncton 1941    only    -       May      4      1:00    1:00    D
1322Rule    Moncton 1946    1972    -       Apr     lastSun 2:00    1:00    D
1323Rule    Moncton 1946    1956    -       Sep     lastSun 2:00    0       S
1324Rule    Moncton 1957    1972    -       Oct     lastSun 2:00    0       S
1325Rule    Moncton 1993    2006    -       Apr     Sun>=1  0:01    1:00    D
1326Rule    Moncton 1993    2006    -       Oct     lastSun 0:01    0       S
1327# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1328Zone America/Moncton    -4:19:08 -      LMT     1883 Dec  9
1329                        -5:00   -       EST     1902 Jun 15
1330                        -4:00   Canada  A%sT    1933
1331                        -4:00   Moncton A%sT    1942
1332                        -4:00   Canada  A%sT    1946
1333                        -4:00   Moncton A%sT    1973
1334                        -4:00   Canada  A%sT    1993
1335                        -4:00   Moncton A%sT    2007
1336                        -4:00   Canada  A%sT
1337
1338# Quebec
1339
1340# From Paul Eggert (2006-07-09):
1341# Shanks & Pottenger write that since 1970 most of Quebec has been
1342# like Montreal.
1343
1344# From Paul Eggert (2006-06-27):
1345# Matthews and Vincent (1998) also write that Quebec east of the -63
1346# meridian is supposed to observe AST, but residents as far east as
1347# Natashquan use EST/EDT, and residents east of Natashquan use AST.
1348# In "Official time in Quebec" the Quebec department of justice writes in
1349# http://www.justice.gouv.qc.ca/english/publications/generale/temps-regl-1-a.htm
1350# that "The residents of the Municipality of the
1351# Cote-Nord-du-Golfe-Saint-Laurent and the municipalities of Saint-Augustin,
1352# Bonne-Esperance and Blanc-Sablon apply the Official Time Act as it is
1353# written and use Atlantic standard time all year round. The same applies to
1354# the residents of the Native facilities along the lower North Shore."
1355# <http://www.assnat.qc.ca/eng/37legislature2/Projets-loi/Publics/06-a002.htm>
1356# says this common practice was codified into law as of 2007.
1357# For lack of better info, guess this practice began around 1970, contra to
1358# Shanks & Pottenger who have this region observing AST/ADT.
1359
1360# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
1361Rule    Mont    1917    only    -       Mar     25      2:00    1:00    D
1362Rule    Mont    1917    only    -       Apr     24      0:00    0       S
1363Rule    Mont    1919    only    -       Mar     31      2:30    1:00    D
1364Rule    Mont    1919    only    -       Oct     25      2:30    0       S
1365Rule    Mont    1920    only    -       May      2      2:30    1:00    D
1366Rule    Mont    1920    1922    -       Oct     Sun>=1  2:30    0       S
1367Rule    Mont    1921    only    -       May      1      2:00    1:00    D
1368Rule    Mont    1922    only    -       Apr     30      2:00    1:00    D
1369Rule    Mont    1924    only    -       May     17      2:00    1:00    D
1370Rule    Mont    1924    1926    -       Sep     lastSun 2:30    0       S
1371Rule    Mont    1925    1926    -       May     Sun>=1  2:00    1:00    D
1372# The 1927-to-1937 rules can be expressed more simply as
1373# Rule  Mont    1927    1937    -       Apr     lastSat 24:00   1:00    D
1374# Rule  Mont    1927    1937    -       Sep     lastSat 24:00   0       S
1375# The rules below avoid use of 24:00
1376# (which pre-1998 versions of zic cannot handle).
1377Rule    Mont    1927    only    -       May     1       0:00    1:00    D
1378Rule    Mont    1927    1932    -       Sep     lastSun 0:00    0       S
1379Rule    Mont    1928    1931    -       Apr     lastSun 0:00    1:00    D
1380Rule    Mont    1932    only    -       May     1       0:00    1:00    D
1381Rule    Mont    1933    1940    -       Apr     lastSun 0:00    1:00    D
1382Rule    Mont    1933    only    -       Oct     1       0:00    0       S
1383Rule    Mont    1934    1939    -       Sep     lastSun 0:00    0       S
1384Rule    Mont    1946    1973    -       Apr     lastSun 2:00    1:00    D
1385Rule    Mont    1945    1948    -       Sep     lastSun 2:00    0       S
1386Rule    Mont    1949    1950    -       Oct     lastSun 2:00    0       S
1387Rule    Mont    1951    1956    -       Sep     lastSun 2:00    0       S
1388Rule    Mont    1957    1973    -       Oct     lastSun 2:00    0       S
1389
1390# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1391Zone America/Blanc-Sablon -3:48:28 -    LMT     1884
1392                        -4:00   Canada  A%sT    1970
1393                        -4:00   -       AST
1394Zone America/Montreal   -4:54:16 -      LMT     1884
1395                        -5:00   Mont    E%sT    1918
1396                        -5:00   Canada  E%sT    1919
1397                        -5:00   Mont    E%sT    1942 Feb  9 2:00s
1398                        -5:00   Canada  E%sT    1946
1399                        -5:00   Mont    E%sT    1974
1400                        -5:00   Canada  E%sT
1401
1402
1403# Ontario
1404
1405# From Paul Eggert (2006-07-09):
1406# Shanks & Pottenger write that since 1970 most of Ontario has been like
1407# Toronto.
1408# Thunder Bay skipped DST in 1973.
1409# Many smaller locales did not observe peacetime DST until 1974;
1410# Nipigon (EST) and Rainy River (CST) are the largest that we know of.
1411# Far west Ontario is like Winnipeg; far east Quebec is like Halifax.
1412
1413# From Mark Brader (2003-07-26):
1414# [According to the Toronto Star] Orillia, Ontario, adopted DST
1415# effective Saturday, 1912-06-22, 22:00; the article mentions that
1416# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw
1417# have already done so.  In Orillia DST was to run until Saturday,
1418# 1912-08-31 (no time mentioned), but it was met with considerable
1419# hostility from certain segments of the public, and was revoked after
1420# only two weeks -- I copied it as Saturday, 1912-07-07, 22:00, but
1421# presumably that should be -07-06.  (1912-06-19, -07-12; also letters
1422# earlier in June).
1423#
1424# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21).
1425
1426# From Paul Eggert (1997-10-17):
1427# Mark Brader writes that an article in the 1997-10-14 Toronto Star
1428# says that Atikokan, Ontario currently does not observe DST,
1429# but will vote on 11-10 whether to use EST/EDT.
1430# He also writes that the
1431# <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html">
1432# Ontario Time Act (1990, Chapter T.9)
1433# </a>
1434# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT.
1435# Officially Atikokan is therefore on CST/CDT, and most likely this report
1436# concerns a non-official time observed as a matter of local practice.
1437#
1438# From Paul Eggert (2000-10-02):
1439# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and
1440# New Osnaburgh observe CST all year, that Big Trout Lake observes
1441# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in
1442# violation of the official Ontario rules.
1443#
1444# From Paul Eggert (2006-07-09):
1445# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the
1446# 2005-07-21 Chronicle-Journal, which said:
1447#
1448#       The clocks in Atikokan stay set on standard time year-round.
1449#       This means they spend about half the time on central time and
1450#       the other half on eastern time.
1451#
1452#       For the most part, the system works, Mayor Dennis Brown said.
1453#
1454#       "The majority of businesses in Atikokan deal more with Eastern
1455#       Canada, but there are some that deal with Western Canada," he
1456#       said.  "I don't see any changes happening here."
1457#
1458# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang
1459# [New Osnaburgh] follow the same practice."
1460
1461# From Garry McKinnon (2006-07-14) via Chris Walton:
1462# I chatted with a member of my board who has an outstanding memory
1463# and a long history in Atikokan (and in the telecom industry) and he
1464# can say for certain that Atikokan has been practicing the current
1465# time keeping since 1952, at least.
1466
1467# From Paul Eggert (2006-07-17):
1468# Shanks & Pottenger say that Atikokan has agreed with Rainy River
1469# ever since standard time was introduced, but the information from
1470# McKinnon sounds more authoritative.  For now, assume that Atikokan
1471# switched to EST immediately after WWII era daylight saving time
1472# ended.  This matches the old (less-populous) America/Coral_Harbour
1473# entry since our cutoff date of 1970, so we can move
1474# America/Coral_Harbour to the 'backward' file.
1475
1476# From Mark Brader (2010-03-06):
1477#
1478# Currently the database has:
1479#
1480# # Ontario
1481#
1482# # From Paul Eggert (2006-07-09):
1483# # Shanks & Pottenger write that since 1970 most of Ontario has been like
1484# # Toronto.
1485# # Thunder Bay skipped DST in 1973.
1486# # Many smaller locales did not observe peacetime DST until 1974;
1487# # Nipigon (EST) and Rainy River (CST) are the largest that we know of.
1488#
1489# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom
1490# right corner of page 1, it says that Toronto will return to standard
1491# time at 2 am Sunday morning (which agrees with the database), and that:
1492#
1493#     The one-hour setback will go into effect throughout most of Ontario,
1494#     except in areas like Windsor which remains on standard time all year.
1495#
1496# Windsor is, of course, a lot larger than Nipigon.
1497#
1498# I only came across this incidentally.  I don't know if Windsor began
1499# observing DST when Detroit did, or in 1974, or on some other date.
1500#
1501# By the way, the article continues by noting that:
1502#
1503#     Some cities in the United States have pushed the deadline back
1504#     three weeks and will change over from daylight saving in October.
1505
1506# From Arthur David Olson (2010-07-17):
1507#
1508# "Standard Time and Time Zones in Canada" appeared in
1509# The Journal of The Royal Astronomical Society of Canada,
1510# volume 26, number 2 (February 1932) and, as of 2010-07-17,
1511# was available at
1512# <a href="http://adsabs.harvard.edu/full/1932JRASC..26...49S">
1513# http://adsabs.harvard.edu/full/1932JRASC..26...49S
1514# </a>
1515#
1516# It includes the text below (starting on page 57):
1517#
1518#   A list of the places in Canada using daylight saving time would
1519# require yearly revision. From information kindly furnished by
1520# the provincial governments and by the postmasters in many cities
1521# and towns, it is found that the following places used daylight sav-
1522# ing in 1930. The information for the province of Quebec is definite,
1523# for the other provinces only approximate:
1524#
1525#       Province        Daylight saving time used
1526# Prince Edward Island  Not used.
1527# Nova Scotia           In Halifax only.
1528# New Brunswick         In St. John only.
1529# Quebec                In the following places:
1530#                       Montreal        Lachine
1531#                       Quebec          Mont-Royal
1532#                       Levis           Iberville
1533#                       St. Lambert     Cap de la Madeleine
1534#                       Verdun          Loretteville
1535#                       Westmount       Richmond
1536#                       Outremont       St. Jerome
1537#                       Longueuil       Greenfield Park
1538#                       Arvida          Waterloo
1539#                       Chambly-Canton  Beaulieu
1540#                       Melbourne       La Tuque
1541#                       St. Theophile   Buckingham
1542# Ontario               Used generally in the cities and towns along
1543#                       the southerly part of the province. Not
1544#                       used in the northwesterlhy part.
1545# Manitoba              Not used.
1546# Saskatchewan          In Regina only.
1547# Alberta               Not used.
1548# British Columbia      Not used.
1549#
1550#   With some exceptions, the use of daylight saving may be said to be limited
1551# to those cities and towns lying between Quebec city and Windsor, Ont.
1552
1553# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
1554Rule    Toronto 1919    only    -       Mar     30      23:30   1:00    D
1555Rule    Toronto 1919    only    -       Oct     26      0:00    0       S
1556Rule    Toronto 1920    only    -       May      2      2:00    1:00    D
1557Rule    Toronto 1920    only    -       Sep     26      0:00    0       S
1558Rule    Toronto 1921    only    -       May     15      2:00    1:00    D
1559Rule    Toronto 1921    only    -       Sep     15      2:00    0       S
1560Rule    Toronto 1922    1923    -       May     Sun>=8  2:00    1:00    D
1561# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16"
1562# was meant.
1563Rule    Toronto 1922    1926    -       Sep     Sun>=15 2:00    0       S
1564Rule    Toronto 1924    1927    -       May     Sun>=1  2:00    1:00    D
1565# The 1927-to-1939 rules can be expressed more simply as
1566# Rule  Toronto 1927    1937    -       Sep     Sun>=25 2:00    0       S
1567# Rule  Toronto 1928    1937    -       Apr     Sun>=25 2:00    1:00    D
1568# Rule  Toronto 1938    1940    -       Apr     lastSun 2:00    1:00    D
1569# Rule  Toronto 1938    1939    -       Sep     lastSun 2:00    0       S
1570# The rules below avoid use of Sun>=25
1571# (which pre-2004 versions of zic cannot handle).
1572Rule    Toronto 1927    1932    -       Sep     lastSun 2:00    0       S
1573Rule    Toronto 1928    1931    -       Apr     lastSun 2:00    1:00    D
1574Rule    Toronto 1932    only    -       May     1       2:00    1:00    D
1575Rule    Toronto 1933    1940    -       Apr     lastSun 2:00    1:00    D
1576Rule    Toronto 1933    only    -       Oct     1       2:00    0       S
1577Rule    Toronto 1934    1939    -       Sep     lastSun 2:00    0       S
1578Rule    Toronto 1945    1946    -       Sep     lastSun 2:00    0       S
1579Rule    Toronto 1946    only    -       Apr     lastSun 2:00    1:00    D
1580Rule    Toronto 1947    1949    -       Apr     lastSun 0:00    1:00    D
1581Rule    Toronto 1947    1948    -       Sep     lastSun 0:00    0       S
1582Rule    Toronto 1949    only    -       Nov     lastSun 0:00    0       S
1583Rule    Toronto 1950    1973    -       Apr     lastSun 2:00    1:00    D
1584Rule    Toronto 1950    only    -       Nov     lastSun 2:00    0       S
1585Rule    Toronto 1951    1956    -       Sep     lastSun 2:00    0       S
1586# Shanks & Pottenger say Toronto ended DST a week early in 1971,
1587# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this
1588# is wrong, and that he had confirmed it by checking the 1971-10-30
1589# Toronto Star, which said that DST was ending 1971-10-31 as usual.
1590Rule    Toronto 1957    1973    -       Oct     lastSun 2:00    0       S
1591
1592# From Paul Eggert (2003-07-27):
1593# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and
1594# Port Arthur, Ontario, the principle of the Bill has been in
1595# operation for the past three years, and in the City of Moose Jaw,
1596# Saskatchewan, for one year."
1597
1598# From David Bryan via Tory Tronrud, Director/Curator,
1599# Thunder Bay Museum (2003-11-12):
1600# There is some suggestion, however, that, by-law or not, daylight
1601# savings time was being practiced in Fort William and Port Arthur
1602# before 1909.... [I]n 1910, the line between the Eastern and Central
1603# Time Zones was permanently moved about two hundred miles west to
1604# include the Thunder Bay area....  When Canada adopted daylight
1605# savings time in 1916, Fort William and Port Arthur, having done so
1606# already, did not change their clocks....  During the Second World
1607# War,... [t]he cities agreed to implement DST during the summer
1608# months for the remainder of the war years.
1609
1610# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1611Zone America/Toronto    -5:17:32 -      LMT     1895
1612                        -5:00   Canada  E%sT    1919
1613                        -5:00   Toronto E%sT    1942 Feb  9 2:00s
1614                        -5:00   Canada  E%sT    1946
1615                        -5:00   Toronto E%sT    1974
1616                        -5:00   Canada  E%sT
1617Zone America/Thunder_Bay -5:57:00 -     LMT     1895
1618                        -6:00   -       CST     1910
1619                        -5:00   -       EST     1942
1620                        -5:00   Canada  E%sT    1970
1621                        -5:00   Mont    E%sT    1973
1622                        -5:00   -       EST     1974
1623                        -5:00   Canada  E%sT
1624Zone America/Nipigon    -5:53:04 -      LMT     1895
1625                        -5:00   Canada  E%sT    1940 Sep 29
1626                        -5:00   1:00    EDT     1942 Feb  9 2:00s
1627                        -5:00   Canada  E%sT
1628Zone America/Rainy_River -6:18:16 -     LMT     1895
1629                        -6:00   Canada  C%sT    1940 Sep 29
1630                        -6:00   1:00    CDT     1942 Feb  9 2:00s
1631                        -6:00   Canada  C%sT
1632Zone America/Atikokan   -6:06:28 -      LMT     1895
1633                        -6:00   Canada  C%sT    1940 Sep 29
1634                        -6:00   1:00    CDT     1942 Feb  9 2:00s
1635                        -6:00   Canada  C%sT    1945 Sep 30 2:00
1636                        -5:00   -       EST
1637
1638
1639# Manitoba
1640
1641# From Rob Douglas (2006-04-06):
1642# the old Manitoba Time Act - as amended by Bill 2, assented to
1643# March 27, 1987 ... said ...
1644# "between two o'clock Central Standard Time in the morning of
1645# the first Sunday of April of each year and two o'clock Central
1646# Standard Time in the morning of the last Sunday of October next
1647# following, one hour in advance of Central Standard Time."...
1648# I believe that the English legislation [of the old time act] had =
1649# been assented to (March 22, 1967)....
1650# Also, as far as I can tell, there was no order-in-council varying
1651# the time of Daylight Saving Time for 2005 and so the provisions of
1652# the 1987 version would apply - the changeover was at 2:00 Central
1653# Standard Time (i.e. not until 3:00 Central Daylight Time).
1654
1655# From Paul Eggert (2006-04-10):
1656# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s)
1657# starting 1966.  Since 02:00s is clearly correct for 1967 on, assume
1658# it was also 02:00s in 1966.
1659
1660# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
1661Rule    Winn    1916    only    -       Apr     23      0:00    1:00    D
1662Rule    Winn    1916    only    -       Sep     17      0:00    0       S
1663Rule    Winn    1918    only    -       Apr     14      2:00    1:00    D
1664Rule    Winn    1918    only    -       Oct     27      2:00    0       S
1665Rule    Winn    1937    only    -       May     16      2:00    1:00    D
1666Rule    Winn    1937    only    -       Sep     26      2:00    0       S
1667Rule    Winn    1942    only    -       Feb      9      2:00    1:00    W # War
1668Rule    Winn    1945    only    -       Aug     14      23:00u  1:00    P # Peace
1669Rule    Winn    1945    only    -       Sep     lastSun 2:00    0       S
1670Rule    Winn    1946    only    -       May     12      2:00    1:00    D
1671Rule    Winn    1946    only    -       Oct     13      2:00    0       S
1672Rule    Winn    1947    1949    -       Apr     lastSun 2:00    1:00    D
1673Rule    Winn    1947    1949    -       Sep     lastSun 2:00    0       S
1674Rule    Winn    1950    only    -       May      1      2:00    1:00    D
1675Rule    Winn    1950    only    -       Sep     30      2:00    0       S
1676Rule    Winn    1951    1960    -       Apr     lastSun 2:00    1:00    D
1677Rule    Winn    1951    1958    -       Sep     lastSun 2:00    0       S
1678Rule    Winn    1959    only    -       Oct     lastSun 2:00    0       S
1679Rule    Winn    1960    only    -       Sep     lastSun 2:00    0       S
1680Rule    Winn    1963    only    -       Apr     lastSun 2:00    1:00    D
1681Rule    Winn    1963    only    -       Sep     22      2:00    0       S
1682Rule    Winn    1966    1986    -       Apr     lastSun 2:00s   1:00    D
1683Rule    Winn    1966    2005    -       Oct     lastSun 2:00s   0       S
1684Rule    Winn    1987    2005    -       Apr     Sun>=1  2:00s   1:00    D
1685# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1686Zone America/Winnipeg   -6:28:36 -      LMT     1887 Jul 16
1687                        -6:00   Winn    C%sT    2006
1688                        -6:00   Canada  C%sT
1689
1690
1691# Saskatchewan
1692
1693# From Mark Brader (2003-07-26):
1694# The first actual adoption of DST in Canada was at the municipal
1695# level.  As the [Toronto] Star put it (1912-06-07), "While people
1696# elsewhere have long been talking of legislation to save daylight,
1697# the city of Moose Jaw [Saskatchewan] has acted on its own hook."
1698# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned:
1699# presumably late evening, as below), and would run until "the end of
1700# the summer".  The discrepancy between municipal time and railroad
1701# time was noted.
1702
1703# From Paul Eggert (2003-07-27):
1704# Willett (1914-03) notes that DST "has been in operation ... in the
1705# City of Moose Jaw, Saskatchewan, for one year."
1706
1707# From Paul Eggert (2006-03-22):
1708# Shanks & Pottenger say that since 1970 this region has mostly been as Regina.
1709# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972.
1710# Other western towns (e.g. Lloydminster) are like Edmonton.
1711# Matthews and Vincent (1998) write that Denare Beach and Creighton
1712# are like Winnipeg, in violation of Saskatchewan law.
1713
1714# From W. Jones (1992-11-06):
1715# The. . .below is based on information I got from our law library, the
1716# provincial archives, and the provincial Community Services department.
1717# A precise history would require digging through newspaper archives, and
1718# since you didn't say what you wanted, I didn't bother.
1719#
1720# Saskatchewan is split by a time zone meridian (105W) and over the years
1721# the boundary became pretty ragged as communities near it reevaluated
1722# their affiliations in one direction or the other.  In 1965 a provincial
1723# referendum favoured legislating common time practices.
1724#
1725# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of
1726# Saskatchewan 1978) was proclaimed, and established that the eastern
1727# part of Saskatchewan would use CST year round, that districts in
1728# northwest Saskatchewan would by default follow CST but could opt to
1729# follow Mountain Time rules (thus 1 hour difference in the winter and
1730# zero in the summer), and that districts in southwest Saskatchewan would
1731# by default follow MT but could opt to follow CST.
1732#
1733# It took a few years for the dust to settle (I know one story of a town
1734# on one time zone having its school in another, such that a mom had to
1735# serve her family lunch in two shifts), but presently it seems that only
1736# a few towns on the border with Alberta (e.g. Lloydminster) follow MT
1737# rules any more; all other districts appear to have used CST year round
1738# since sometime in the 1960s.
1739
1740# From Chris Walton (2006-06-26):
1741# The Saskatchewan time act which was last updated in 1996 is about 30 pages
1742# long and rather painful to read.
1743# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf
1744
1745# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
1746Rule    Regina  1918    only    -       Apr     14      2:00    1:00    D
1747Rule    Regina  1918    only    -       Oct     27      2:00    0       S
1748Rule    Regina  1930    1934    -       May     Sun>=1  0:00    1:00    D
1749Rule    Regina  1930    1934    -       Oct     Sun>=1  0:00    0       S
1750Rule    Regina  1937    1941    -       Apr     Sun>=8  0:00    1:00    D
1751Rule    Regina  1937    only    -       Oct     Sun>=8  0:00    0       S
1752Rule    Regina  1938    only    -       Oct     Sun>=1  0:00    0       S
1753Rule    Regina  1939    1941    -       Oct     Sun>=8  0:00    0       S
1754Rule    Regina  1942    only    -       Feb      9      2:00    1:00    W # War
1755Rule    Regina  1945    only    -       Aug     14      23:00u  1:00    P # Peace
1756Rule    Regina  1945    only    -       Sep     lastSun 2:00    0       S
1757Rule    Regina  1946    only    -       Apr     Sun>=8  2:00    1:00    D
1758Rule    Regina  1946    only    -       Oct     Sun>=8  2:00    0       S
1759Rule    Regina  1947    1957    -       Apr     lastSun 2:00    1:00    D
1760Rule    Regina  1947    1957    -       Sep     lastSun 2:00    0       S
1761Rule    Regina  1959    only    -       Apr     lastSun 2:00    1:00    D
1762Rule    Regina  1959    only    -       Oct     lastSun 2:00    0       S
1763#
1764Rule    Swift   1957    only    -       Apr     lastSun 2:00    1:00    D
1765Rule    Swift   1957    only    -       Oct     lastSun 2:00    0       S
1766Rule    Swift   1959    1961    -       Apr     lastSun 2:00    1:00    D
1767Rule    Swift   1959    only    -       Oct     lastSun 2:00    0       S
1768Rule    Swift   1960    1961    -       Sep     lastSun 2:00    0       S
1769# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1770Zone America/Regina     -6:58:36 -      LMT     1905 Sep
1771                        -7:00   Regina  M%sT    1960 Apr lastSun 2:00
1772                        -6:00   -       CST
1773Zone America/Swift_Current -7:11:20 -   LMT     1905 Sep
1774                        -7:00   Canada  M%sT    1946 Apr lastSun 2:00
1775                        -7:00   Regina  M%sT    1950
1776                        -7:00   Swift   M%sT    1972 Apr lastSun 2:00
1777                        -6:00   -       CST
1778
1779
1780# Alberta
1781
1782# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
1783Rule    Edm     1918    1919    -       Apr     Sun>=8  2:00    1:00    D
1784Rule    Edm     1918    only    -       Oct     27      2:00    0       S
1785Rule    Edm     1919    only    -       May     27      2:00    0       S
1786Rule    Edm     1920    1923    -       Apr     lastSun 2:00    1:00    D
1787Rule    Edm     1920    only    -       Oct     lastSun 2:00    0       S
1788Rule    Edm     1921    1923    -       Sep     lastSun 2:00    0       S
1789Rule    Edm     1942    only    -       Feb      9      2:00    1:00    W # War
1790Rule    Edm     1945    only    -       Aug     14      23:00u  1:00    P # Peace
1791Rule    Edm     1945    only    -       Sep     lastSun 2:00    0       S
1792Rule    Edm     1947    only    -       Apr     lastSun 2:00    1:00    D
1793Rule    Edm     1947    only    -       Sep     lastSun 2:00    0       S
1794Rule    Edm     1967    only    -       Apr     lastSun 2:00    1:00    D
1795Rule    Edm     1967    only    -       Oct     lastSun 2:00    0       S
1796Rule    Edm     1969    only    -       Apr     lastSun 2:00    1:00    D
1797Rule    Edm     1969    only    -       Oct     lastSun 2:00    0       S
1798Rule    Edm     1972    1986    -       Apr     lastSun 2:00    1:00    D
1799Rule    Edm     1972    2006    -       Oct     lastSun 2:00    0       S
1800# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1801Zone America/Edmonton   -7:33:52 -      LMT     1906 Sep
1802                        -7:00   Edm     M%sT    1987
1803                        -7:00   Canada  M%sT
1804
1805
1806# British Columbia
1807
1808# From Paul Eggert (2006-03-22):
1809# Shanks & Pottenger write that since 1970 most of this region has
1810# been like Vancouver.
1811# Dawson Creek uses MST.  Much of east BC is like Edmonton.
1812# Matthews and Vincent (1998) write that Creston is like Dawson Creek.
1813
1814# It seems though that (re: Creston) is not entirely correct:
1815
1816# From Chris Walton (2011-12-01):
1817# There are two areas within the Canadian province of British Columbia
1818# that do not currently observe daylight saving:
1819# a) The Creston Valley (includes the town of Creston and surrounding area)
1820# b) The eastern half of the Peace River Regional District
1821# (includes the cities of Dawson Creek and Fort St. John)
1822
1823# Earlier this year I stumbled across a detailed article about the time
1824# keeping history of Creston; it was written by Tammy Hardwick who is the
1825# manager of the Creston & District Museum. The article was written in May 2009.
1826# <a href="http://www.ilovecreston.com/?p=articles&t=spec&ar=260">
1827# http://www.ilovecreston.com/?p=articles&t=spec&ar=260
1828# </a>
1829# According to the article, Creston has not changed its clocks since June 1918.
1830# i.e. Creston has been stuck on UTC-7 for 93 years.
1831# Dawson Creek, on the other hand, changed its clocks as recently as April 1972.
1832
1833# Unfortunately the exact date for the time change in June 1918 remains
1834# unknown and will be difficult to ascertain.  I e-mailed Tammy a few months
1835# ago to ask if Sunday June 2 was a reasonable guess.  She said it was just
1836# as plausible as any other date (in June).  She also said that after writing the
1837# article she had discovered another time change in 1916; this is the subject
1838# of another article which she wrote in October 2010.
1839# <a href="http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56">
1840# http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56
1841# </a>
1842
1843# Here is a summary of the three clock change events in Creston's history:
1844# 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7)
1845# Exact date unknown
1846# 2. Oct 1916: switch to Pacific Standard Time (GMT-8)
1847# Exact date in October unknown;  Sunday October 1 is a reasonable guess.
1848# 3. June 1918: switch to Pacific Daylight Time (GMT-7)
1849# Exact date in June unknown; Sunday June 2 is a reasonable guess.
1850# note#1:
1851# On Oct 27/1918 when daylight saving ended in the rest of Canada,
1852# Creston did not change its clocks.
1853# note#2:
1854# During WWII when the Federal Government legislated a mandatory clock change,
1855# Creston did not oblige.
1856# note#3:
1857# There is no guarantee that Creston will remain on Mountain Standard Time
1858# (UTC-7) forever.
1859# The subject was debated at least once this year by the town Council.
1860# <a href="http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html">
1861# http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html
1862# </a>
1863
1864# During a period WWII, summer time (Daylight saying) was mandatory in Canada.
1865# In Creston, that was handled by shifting the area to PST (-8:00) then applying
1866# summer time to cause the offset to be -7:00, the same as it had been before
1867# the change.  It can be argued that the timezone abbreviation during this
1868# period should be PDT rather than MST, but that doesn't seem important enough
1869# (to anyone) to further complicate the rules.
1870
1871# The transition dates (and times) are guesses.
1872
1873# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
1874Rule    Vanc    1918    only    -       Apr     14      2:00    1:00    D
1875Rule    Vanc    1918    only    -       Oct     27      2:00    0       S
1876Rule    Vanc    1942    only    -       Feb      9      2:00    1:00    W # War
1877Rule    Vanc    1945    only    -       Aug     14      23:00u  1:00    P # Peace
1878Rule    Vanc    1945    only    -       Sep     30      2:00    0       S
1879Rule    Vanc    1946    1986    -       Apr     lastSun 2:00    1:00    D
1880Rule    Vanc    1946    only    -       Oct     13      2:00    0       S
1881Rule    Vanc    1947    1961    -       Sep     lastSun 2:00    0       S
1882Rule    Vanc    1962    2006    -       Oct     lastSun 2:00    0       S
1883# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1884Zone America/Vancouver  -8:12:28 -      LMT     1884
1885                        -8:00   Vanc    P%sT    1987
1886                        -8:00   Canada  P%sT
1887Zone America/Dawson_Creek -8:00:56 -    LMT     1884
1888                        -8:00   Canada  P%sT    1947
1889                        -8:00   Vanc    P%sT    1972 Aug 30 2:00
1890                        -7:00   -       MST
1891Zone America/Creston    -7:46:04 -      LMT     1884
1892                        -7:00   -       MST     1916 Oct 1
1893                        -8:00   -       PST     1918 Jun 2
1894                        -7:00   -       MST
1895
1896# Northwest Territories, Nunavut, Yukon
1897
1898# From Paul Eggert (2006-03-22):
1899# Dawson switched to PST in 1973.  Inuvik switched to MST in 1979.
1900# Mathew Englander (1996-10-07) gives the following refs:
1901#       * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
1902#       c. 7 defines Yukon standard time as UTC-9.  This is still valid;
1903#       see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).
1904#       * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.
1905#       * O.I.C. 1980/02 established DST.
1906#       * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00.
1907# Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go
1908# with Englander.
1909# From Chris Walton (2006-06-26):
1910# Here is a link to the old daylight saving portion of the interpretation
1911# act which was last updated in 1987:
1912# http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf
1913
1914# From Rives McDow (1999-09-04):
1915# Nunavut ... moved ... to incorporate the whole territory into one time zone.
1916# <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html">
1917# Nunavut moves to single time zone Oct. 31
1918# </a>
1919#
1920# From Antoine Leca (1999-09-06):
1921# We then need to create a new timezone for the Kitikmeot region of Nunavut
1922# to differentiate it from the Yellowknife region.
1923
1924# From Paul Eggert (1999-09-20):
1925# <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html">
1926# Basic Facts: The New Territory
1927# </a> (1999) reports that Pangnirtung operates on eastern time,
1928# and that Coral Harbour does not observe DST.  We don't know when
1929# Pangnirtung switched to eastern time; we'll guess 1995.
1930
1931# From Rives McDow (1999-11-08):
1932# On October 31, when the rest of Nunavut went to Central time,
1933# Pangnirtung wobbled.  Here is the result of their wobble:
1934#
1935# The following businesses and organizations in Pangnirtung use Central Time:
1936#
1937#       First Air, Power Corp, Nunavut Construction, Health Center, RCMP,
1938#       Eastern Arctic National Parks, A & D Specialist
1939#
1940# The following businesses and organizations in Pangnirtung use Eastern Time:
1941#
1942#       Hamlet office, All other businesses, Both schools, Airport operator
1943#
1944# This has made for an interesting situation there, which warranted the news.
1945# No one there that I spoke with seems concerned, or has plans to
1946# change the local methods of keeping time, as it evidently does not
1947# really interfere with any activities or make things difficult locally.
1948# They plan to celebrate New Year's turn-over twice, one hour apart,
1949# so it appears that the situation will last at least that long.
1950# The Nunavut Intergovernmental Affairs hopes that they will "come to
1951# their senses", but the locals evidently don't see any problem with
1952# the current state of affairs.
1953
1954# From Michaela Rodrigue, writing in the
1955# <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html">
1956# Nunatsiaq News (1999-11-19)</a>:
1957# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones,
1958# central - or Nunavut time - for government offices, and eastern time
1959# for municipal offices and schools....  Igloolik [was similar but then]
1960# made the switch to central time on Saturday, Nov. 6.
1961
1962# From Paul Eggert (2000-10-02):
1963# Matthews and Vincent (1998) say the following, but we lack histories
1964# for these potential new Zones.
1965#
1966# The Canadian Forces station at Alert uses Eastern Time while the
1967# handful of residents at the Eureka weather station [in the Central
1968# zone] skip daylight savings.  Baffin Island, which is crossed by the
1969# Central, Eastern and Atlantic Time zones only uses Eastern Time.
1970# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of
1971# Central Time and Southampton Island [in the Central zone] is not
1972# required to use daylight savings.
1973
1974# From
1975# <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html">
1976# Nunavut now has two time zones
1977# </a> (2000-11-10):
1978# The Nunavut government would allow its employees in Kugluktuk and
1979# Cambridge Bay to operate on central time year-round, putting them
1980# one hour behind the rest of Nunavut for six months during the winter.
1981# At the end of October the two communities had rebelled against
1982# Nunavut's unified time zone, refusing to shift to eastern time with
1983# the rest of the territory for the winter.  Cambridge Bay remained on
1984# central time, while Kugluktuk, even farther west, reverted to
1985# mountain time, which they had used before the advent of Nunavut's
1986# unified time zone in 1999.
1987#
1988# From Rives McDow (2001-01-20), quoting the Nunavut government:
1989# The preceding decision came into effect at midnight, Saturday Nov 4, 2000.
1990
1991# From Paul Eggert (2000-12-04):
1992# Let's just keep track of the official times for now.
1993
1994# From Rives McDow (2001-03-07):
1995# The premier of Nunavut has issued a ministerial statement advising
1996# that effective 2001-04-01, the territory of Nunavut will revert
1997# back to three time zones (mountain, central, and eastern).  Of the
1998# cities in Nunavut, Coral Harbor is the only one that I know of that
1999# has said it will not observe dst, staying on EST year round.  I'm
2000# checking for more info, and will get back to you if I come up with
2001# more.
2002# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).]
2003
2004# From Gwillim Law (2005-05-21):
2005# According to maps at
2006# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg
2007# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg
2008# (both dated 2003), and
2009# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp
2010# (from a 1998 Canadian Geographic article), the de facto and de jure time
2011# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year
2012# round.  Using Google, it's easy to find other websites that confirm this.
2013# I wasn't able to find how far back this time regimen goes, but since it
2014# predates the creation of Nunavut, it probably goes back many years....
2015# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used.
2016#
2017# From Paul Eggert (2005-07-26):
2018# For lack of better information, assume that Southampton Island observed
2019# daylight saving only during wartime.
2020
2021# From Chris Walton (2007-03-01):
2022# ... the community of Resolute (located on Cornwallis Island in
2023# Nunavut) moved from Central Time to Eastern Time last November.
2024# Basically the community did not change its clocks at the end of
2025# daylight saving....
2026# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html
2027
2028# From Chris Walton (2011-03-21):
2029# Back in 2007 I initiated the creation of a new "zone file" for Resolute
2030# Bay. Resolute Bay is a small community located about 900km north of
2031# the Arctic Circle. The zone file was required because Resolute Bay had
2032# decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007.
2033#
2034# According to new information which I received last week, Resolute Bay
2035# went back to using UTC-6 in the winter of 2007-2008...
2036#
2037# On March 11/2007 most of Canada went onto daylight saving. On March
2038# 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I
2039# talked to somebody that was both knowledgeable and helpful. I was able
2040# to confirm that Resolute Bay was still operating on UTC-5. It was
2041# explained to me that Resolute Bay had been on the Eastern Time zone
2042# (EST) in the winter, and was now back on the Central Time zone (CDT).
2043# i.e. the time zone had changed twice in the last year but the clocks
2044# had not moved. The residents had to know which time zone they were in
2045# so they could follow the correct TV schedule...
2046#
2047# On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I
2048# phoned the Resolute Bay hamlet office...[D]ue to the challenging nature
2049# of the phone call, I decided to seek out an alternate source of
2050# information. I found an e-mail address for somebody by the name of
2051# Stephanie Adams whose job was listed as "Inns North Support Officer for
2052# Arctic Co-operatives." I was under the impression that Stephanie lived
2053# and worked in Resolute Bay...
2054#
2055# On March 14/2011 I phoned the hamlet office again. I was told that
2056# Resolute Bay had been using Central Standard Time over the winter of
2057# 2010-2011 and that the clocks had therefore been moved one hour ahead
2058# on March 13/2011. The person I talked to was aware that Resolute Bay
2059# had previously experimented with Eastern Standard Time but he could not
2060# tell me when the practice had stopped.
2061#
2062# On March 17/2011 I searched the Web to find an e-mail address of
2063# somebody that might be able to tell me exactly when Resolute Bay went
2064# off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz
2065# used to be the mayor of Resolute Bay and he apparently owns half the
2066# businesses including "South Camp Inn." This website has some info on
2067# Aziz:
2068# <a href="http://www.uphere.ca/node/493">
2069# http://www.uphere.ca/node/493
2070# </a>
2071#
2072# I sent Aziz an e-mail asking when Resolute Bay had stopped using
2073# Eastern Standard Time.
2074#
2075# Aziz responded quickly with this: "hi, The time was not changed for the
2076# 1 year only, the following year, the community went back to the old way
2077# of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in
2078# the winter Zulu plus 6 hrs"
2079#
2080# This of course conflicted with everything I had ascertained in November 2008.
2081#
2082# I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz
2083# responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You
2084# may want to check with the weather office in Resolute Bay or do a
2085# search on the weather through Env. Canada. web site"
2086#
2087# If I had realized the Stephanie did not live in Resolute Bay I would
2088# never have contacted her.  I now believe that all the information I
2089# obtained in November 2008 should be ignored...
2090# I apologize for reporting incorrect information in 2008.
2091
2092# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
2093Rule    NT_YK   1918    only    -       Apr     14      2:00    1:00    D
2094Rule    NT_YK   1918    only    -       Oct     27      2:00    0       S
2095Rule    NT_YK   1919    only    -       May     25      2:00    1:00    D
2096Rule    NT_YK   1919    only    -       Nov      1      0:00    0       S
2097Rule    NT_YK   1942    only    -       Feb      9      2:00    1:00    W # War
2098Rule    NT_YK   1945    only    -       Aug     14      23:00u  1:00    P # Peace
2099Rule    NT_YK   1945    only    -       Sep     30      2:00    0       S
2100Rule    NT_YK   1965    only    -       Apr     lastSun 0:00    2:00    DD
2101Rule    NT_YK   1965    only    -       Oct     lastSun 2:00    0       S
2102Rule    NT_YK   1980    1986    -       Apr     lastSun 2:00    1:00    D
2103Rule    NT_YK   1980    2006    -       Oct     lastSun 2:00    0       S
2104Rule    NT_YK   1987    2006    -       Apr     Sun>=1  2:00    1:00    D
2105# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
2106# aka Panniqtuuq
2107Zone America/Pangnirtung 0      -       zzz     1921 # trading post est.
2108                        -4:00   NT_YK   A%sT    1995 Apr Sun>=1 2:00
2109                        -5:00   Canada  E%sT    1999 Oct 31 2:00
2110                        -6:00   Canada  C%sT    2000 Oct 29 2:00
2111                        -5:00   Canada  E%sT
2112# formerly Frobisher Bay
2113Zone America/Iqaluit    0       -       zzz     1942 Aug # Frobisher Bay est.
2114                        -5:00   NT_YK   E%sT    1999 Oct 31 2:00
2115                        -6:00   Canada  C%sT    2000 Oct 29 2:00
2116                        -5:00   Canada  E%sT
2117# aka Qausuittuq
2118Zone America/Resolute   0       -       zzz     1947 Aug 31 # Resolute founded
2119                        -6:00   NT_YK   C%sT    2000 Oct 29 2:00
2120                        -5:00   -       EST     2001 Apr  1 3:00
2121                        -6:00   Canada  C%sT    2006 Oct 29 2:00
2122                        -5:00   -       EST     2007 Mar 11 3:00
2123                        -6:00   Canada  C%sT
2124# aka Kangiqiniq
2125Zone America/Rankin_Inlet 0     -       zzz     1957 # Rankin Inlet founded
2126                        -6:00   NT_YK   C%sT    2000 Oct 29 2:00
2127                        -5:00   -       EST     2001 Apr  1 3:00
2128                        -6:00   Canada  C%sT
2129# aka Iqaluktuuttiaq
2130Zone America/Cambridge_Bay 0    -       zzz     1920 # trading post est.?
2131                        -7:00   NT_YK   M%sT    1999 Oct 31 2:00
2132                        -6:00   Canada  C%sT    2000 Oct 29 2:00
2133                        -5:00   -       EST     2000 Nov  5 0:00
2134                        -6:00   -       CST     2001 Apr  1 3:00
2135                        -7:00   Canada  M%sT
2136Zone America/Yellowknife 0      -       zzz     1935 # Yellowknife founded?
2137                        -7:00   NT_YK   M%sT    1980
2138                        -7:00   Canada  M%sT
2139Zone America/Inuvik     0       -       zzz     1953 # Inuvik founded
2140                        -8:00   NT_YK   P%sT    1979 Apr lastSun 2:00
2141                        -7:00   NT_YK   M%sT    1980
2142                        -7:00   Canada  M%sT
2143Zone America/Whitehorse -9:00:12 -      LMT     1900 Aug 20
2144                        -9:00   NT_YK   Y%sT    1966 Jul 1 2:00
2145                        -8:00   NT_YK   P%sT    1980
2146                        -8:00   Canada  P%sT
2147Zone America/Dawson     -9:17:40 -      LMT     1900 Aug 20
2148                        -9:00   NT_YK   Y%sT    1973 Oct 28 0:00
2149                        -8:00   NT_YK   P%sT    1980
2150                        -8:00   Canada  P%sT
2151
2152
2153###############################################################################
2154
2155# Mexico
2156
2157# From Paul Eggert (2001-03-05):
2158# The Investigation and Analysis Service of the
2159# Mexican Library of Congress (MLoC) has published a
2160# <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/">
2161# history of Mexican local time (in Spanish)
2162# </a>.
2163#
2164# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC.
2165# (In all cases we go with the MLoC.)
2166# S&P report that Baja was at -8:00 in 1922/1923.
2167# S&P say the 1930 transition in Baja was 1930-11-16.
2168# S&P report no DST during summer 1931.
2169# S&P report a transition at 1932-03-30 23:00, not 1932-04-01.
2170
2171# From Gwillim Law (2001-02-20):
2172# There are some other discrepancies between the Decrees page and the
2173# tz database.  I think they can best be explained by supposing that
2174# the researchers who prepared the Decrees page failed to find some of
2175# the relevant documents.
2176
2177# From Alan Perry (1996-02-15):
2178# A guy from our Mexico subsidiary finally found the Presidential Decree
2179# outlining the timezone changes in Mexico.
2180#
2181# ------------- Begin Forwarded Message -------------
2182#
2183# I finally got my hands on the Official Presidential Decree that sets up the
2184# rules for the DST changes. The rules are:
2185#
2186# 1. The country is divided in 3 timezones:
2187#    - Baja California Norte (the Mexico/BajaNorte TZ)
2188#    - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ)
2189#    - The rest of the country (the Mexico/General TZ)
2190#
2191# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October
2192#    at 2:00 AM, the times in each zone are as follows:
2193#    BajaNorte: GMT+7
2194#    BajaSur:   GMT+6
2195#    General:   GMT+5
2196#
2197# 3. The rest of the year, the times are as follows:
2198#    BajaNorte: GMT+8
2199#    BajaSur:   GMT+7
2200#    General:   GMT+6
2201#
2202# The Decree was published in Mexico's Official Newspaper on January 4th.
2203#
2204# -------------- End Forwarded Message --------------
2205# From Paul Eggert (1996-06-12):
2206# For an English translation of the decree, see
2207# <a href="http://mexico-travel.com/extra/timezone_eng.html">
2208# ``Diario Oficial: Time Zone Changeover'' (1996-01-04).
2209# </a>
2210
2211# From Rives McDow (1998-10-08):
2212# The State of Quintana Roo has reverted back to central STD and DST times
2213# (i.e. UTC -0600 and -0500 as of 1998-08-02).
2214
2215# From Rives McDow (2000-01-10):
2216# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time
2217# zone 5 hours from the International Date Line, and will not observe daylight
2218# savings time so as to stay on the same time zone as the southern part of
2219# Arizona year round.
2220
2221# From Jesper Norgaard, translating
2222# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17):
2223# In Oaxaca, the 55.000 teachers from the Section 22 of the National
2224# Syndicate of Education Workers, refuse to apply daylight saving each
2225# year, so that the more than 10,000 schools work at normal hour the
2226# whole year.
2227
2228# From Gwillim Law (2001-01-19):
2229# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says
2230# (translated):...
2231# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced
2232# that Summer Time will be reduced from seven to five months, starting
2233# this year....
2234# <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001>
2235# [translated], says "summer time will ... take effect on the first Sunday
2236# in May, and end on the last Sunday of September.
2237
2238# From Arthur David Olson (2001-01-25):
2239# The 2001-01-24 traditional Washington Post contained the page one
2240# story "Timely Issue Divides Mexicans."...
2241# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html
2242# ... Mexico City Mayor Lopez Obrador "...is threatening to keep
2243# Mexico City and its 20 million residents on a different time than
2244# the rest of the country..." In particular, Lopez Obrador would abolish
2245# observation of Daylight Saving Time.
2246
2247# <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre">
2248# Official statute published by the Energy Department
2249# </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules,
2250# and Sonora with no DST.  This was reported by Jesper Norgaard (2001-02-03).
2251
2252# From Paul Eggert (2001-03-03):
2253#
2254# <a href="http://www.latimes.com/news/nation/20010303/t000018766.html">
2255# James F. Smith writes in today's LA Times
2256# </a>
2257# * Sonora will continue to observe standard time.
2258# * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that
2259#   the Federal District will not adopt DST.
2260# * 4 of 16 district leaders announced they'll ignore the decree.
2261# * The decree does not affect federal-controlled facilities including
2262#   the airport, banks, hospitals, and schools.
2263#
2264# For now we'll assume that the Federal District will bow to federal rules.
2265
2266# From Jesper Norgaard (2001-04-01):
2267# I found some references to the Mexican application of daylight
2268# saving, which modifies what I had already sent you, stating earlier
2269# that a number of northern Mexican states would go on daylight
2270# saving. The modification reverts this to only cover Baja California
2271# (Norte), while all other states (except Sonora, who has no daylight
2272# saving all year) will follow the original decree of president
2273# Vicente Fox, starting daylight saving May 6, 2001 and ending
2274# September 30, 2001.
2275# References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp>
2276# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31)
2277
2278# From Reuters (2001-09-04):
2279# Mexico's Supreme Court on Tuesday declared that daylight savings was
2280# unconstitutional in Mexico City, creating the possibility the
2281# capital will be in a different time zone from the rest of the nation
2282# next year....  The Supreme Court's ruling takes effect at 2:00
2283# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to
2284# standard time. "This is so residents of the Federal District are not
2285# subject to unexpected time changes," a statement from the court said.
2286
2287# From Jesper Norgaard Welen (2002-03-12):
2288# ... consulting my local grocery store(!) and my coworkers, they all insisted
2289# that a new decision had been made to reinstate US style DST in Mexico....
2290# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20)
2291# confirms this.  Sonora as usual is the only state where DST is not applied.
2292
2293# From Steffen Thorsen (2009-12-28):
2294#
2295# Steffen Thorsen wrote:
2296# > Mexico's House of Representatives has approved a proposal for northern
2297# > Mexico's border cities to share the same daylight saving schedule as
2298# > the United States.
2299# Now this has passed both the Congress and the Senate, so starting from
2300# 2010, some border regions will be the same:
2301# <a href="http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/">
2302# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/
2303# </a>
2304# <a href="http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939">
2305# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939
2306# </a>
2307# (Spanish)
2308#
2309# Could not find the new law text, but the proposed law text changes are here:
2310# <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf">
2311# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf
2312# </a>
2313# (Gaceta Parlamentaria)
2314#
2315# There is also a list of the votes here:
2316# <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html">
2317# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html
2318# </a>
2319#
2320# Our page:
2321# <a href="http://www.timeanddate.com/news/time/north-mexico-dst-change.html">
2322# http://www.timeanddate.com/news/time/north-mexico-dst-change.html
2323# </a>
2324
2325# From Arthur David Olson (2010-01-20):
2326# The page
2327# <a href="http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010">
2328# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010
2329# </a>
2330# includes this text:
2331# En los municipios fronterizos de Tijuana y Mexicali en Baja California;
2332# Ju&aacute;rez y Ojinaga en Chihuahua; Acu&ntilde;a y Piedras Negras en Coahuila;
2333# An&aacute;huac en Nuevo Le&oacute;n; y Nuevo Laredo, Reynosa y Matamoros en
2334# Tamaulipas, la aplicaci&oacute;n de este horario estacional surtir&aacute; efecto
2335# desde las dos horas del segundo domingo de marzo y concluir&aacute; a las dos
2336# horas del primer domingo de noviembre.
2337# En los municipios fronterizos que se encuentren ubicados en la franja
2338# fronteriza norte en el territorio comprendido entre la l&iacute;nea
2339# internacional y la l&iacute;nea paralela ubicada a una distancia de veinte
2340# kil&oacute;metros, as&iacute; como la Ciudad de Ensenada, Baja California, hacia el
2341# interior del pa&iacute;s, la aplicaci&oacute;n de este horario estacional surtir&aacute;
2342# efecto desde las dos horas del segundo domingo de marzo y concluir&aacute; a
2343# las dos horas del primer domingo de noviembre.
2344
2345# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
2346Rule    Mexico  1939    only    -       Feb     5       0:00    1:00    D
2347Rule    Mexico  1939    only    -       Jun     25      0:00    0       S
2348Rule    Mexico  1940    only    -       Dec     9       0:00    1:00    D
2349Rule    Mexico  1941    only    -       Apr     1       0:00    0       S
2350Rule    Mexico  1943    only    -       Dec     16      0:00    1:00    W # War
2351Rule    Mexico  1944    only    -       May     1       0:00    0       S
2352Rule    Mexico  1950    only    -       Feb     12      0:00    1:00    D
2353Rule    Mexico  1950    only    -       Jul     30      0:00    0       S
2354Rule    Mexico  1996    2000    -       Apr     Sun>=1  2:00    1:00    D
2355Rule    Mexico  1996    2000    -       Oct     lastSun 2:00    0       S
2356Rule    Mexico  2001    only    -       May     Sun>=1  2:00    1:00    D
2357Rule    Mexico  2001    only    -       Sep     lastSun 2:00    0       S
2358Rule    Mexico  2002    max     -       Apr     Sun>=1  2:00    1:00    D
2359Rule    Mexico  2002    max     -       Oct     lastSun 2:00    0       S
2360# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
2361# Quintana Roo
2362Zone America/Cancun     -5:47:04 -      LMT     1922 Jan  1  0:12:56
2363                        -6:00   -       CST     1981 Dec 23
2364                        -5:00   Mexico  E%sT    1998 Aug  2  2:00
2365                        -6:00   Mexico  C%sT
2366# Campeche, Yucatan
2367Zone America/Merida     -5:58:28 -      LMT     1922 Jan  1  0:01:32
2368                        -6:00   -       CST     1981 Dec 23
2369                        -5:00   -       EST     1982 Dec  2
2370                        -6:00   Mexico  C%sT
2371# Coahuila, Durango, Nuevo Leon, Tamaulipas (near US border)
2372Zone America/Matamoros  -6:40:00 -      LMT     1921 Dec 31 23:20:00
2373                        -6:00   -       CST     1988
2374                        -6:00   US      C%sT    1989
2375                        -6:00   Mexico  C%sT    2010
2376                        -6:00   US      C%sT
2377# Coahuila, Durango, Nuevo Leon, Tamaulipas (away from US border)
2378Zone America/Monterrey  -6:41:16 -      LMT     1921 Dec 31 23:18:44
2379                        -6:00   -       CST     1988
2380                        -6:00   US      C%sT    1989
2381                        -6:00   Mexico  C%sT
2382# Central Mexico
2383Zone America/Mexico_City -6:36:36 -     LMT     1922 Jan  1 0:23:24
2384                        -7:00   -       MST     1927 Jun 10 23:00
2385                        -6:00   -       CST     1930 Nov 15
2386                        -7:00   -       MST     1931 May  1 23:00
2387                        -6:00   -       CST     1931 Oct
2388                        -7:00   -       MST     1932 Apr  1
2389                        -6:00   Mexico  C%sT    2001 Sep 30 02:00
2390                        -6:00   -       CST     2002 Feb 20
2391                        -6:00   Mexico  C%sT
2392# Chihuahua (near US border)
2393Zone America/Ojinaga    -6:57:40 -      LMT     1922 Jan 1 0:02:20
2394                        -7:00   -       MST     1927 Jun 10 23:00
2395                        -6:00   -       CST     1930 Nov 15
2396                        -7:00   -       MST     1931 May  1 23:00
2397                        -6:00   -       CST     1931 Oct
2398                        -7:00   -       MST     1932 Apr  1
2399                        -6:00   -       CST     1996
2400                        -6:00   Mexico  C%sT    1998
2401                        -6:00   -       CST     1998 Apr Sun>=1 3:00
2402                        -7:00   Mexico  M%sT    2010
2403                        -7:00   US      M%sT
2404# Chihuahua (away from US border)
2405Zone America/Chihuahua  -7:04:20 -      LMT     1921 Dec 31 23:55:40
2406                        -7:00   -       MST     1927 Jun 10 23:00
2407                        -6:00   -       CST     1930 Nov 15
2408                        -7:00   -       MST     1931 May  1 23:00
2409                        -6:00   -       CST     1931 Oct
2410                        -7:00   -       MST     1932 Apr  1
2411                        -6:00   -       CST     1996
2412                        -6:00   Mexico  C%sT    1998
2413                        -6:00   -       CST     1998 Apr Sun>=1 3:00
2414                        -7:00   Mexico  M%sT
2415# Sonora
2416Zone America/Hermosillo -7:23:52 -      LMT     1921 Dec 31 23:36:08
2417                        -7:00   -       MST     1927 Jun 10 23:00
2418                        -6:00   -       CST     1930 Nov 15
2419                        -7:00   -       MST     1931 May  1 23:00
2420                        -6:00   -       CST     1931 Oct
2421                        -7:00   -       MST     1932 Apr  1
2422                        -6:00   -       CST     1942 Apr 24
2423                        -7:00   -       MST     1949 Jan 14
2424                        -8:00   -       PST     1970
2425                        -7:00   Mexico  M%sT    1999
2426                        -7:00   -       MST
2427
2428# From Alexander Krivenyshev (2010-04-21):
2429# According to news, Bah&iacute;a de Banderas (Mexican state of Nayarit)
2430# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to
2431# share the same time zone as nearby city Puerto Vallarta, Jalisco).
2432#
2433# (Spanish)
2434# Bah&iacute;a de Banderas homologa su horario al del centro del
2435# pa&iacute;s, a partir de este domingo
2436# <a href="http://www.nayarit.gob.mx/notes.asp?id=20748">
2437# http://www.nayarit.gob.mx/notes.asp?id=20748
2438# </a>
2439#
2440# Bah&iacute;a de Banderas homologa su horario con el del Centro del
2441# Pa&iacute;s
2442# <a href="http://www.bahiadebanderas.gob.mx/principal/index.php?option=com_content&view=article&id=261:bahia-de-banderas-homologa-su-horario-con-el-del-centro-del-pais&catid=42:comunicacion-social&Itemid=50">
2443# http://www.bahiadebanderas.gob.mx/principal/index.php?option=com_content&view=article&id=261:bahia-de-banderas-homologa-su-horario-con-el-del-centro-del-pais&catid=42:comunicacion-social&Itemid=50"
2444# </a>
2445#
2446# (English)
2447# Puerto Vallarta and Bah&iacute;a de Banderas: One Time Zone
2448# <a href="http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml">
2449# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml
2450# </a>
2451#
2452# or
2453# <a href="http://www.worldtimezone.com/dst_news/dst_news_mexico08.html">
2454# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html
2455# </a>
2456#
2457# "Mexico's Senate approved the amendments to the Mexican Schedule System that
2458# will allow Bah&iacute;a de Banderas and Puerto Vallarta to share the same time
2459# zone ..."
2460# Baja California Sur, Nayarit, Sinaloa
2461
2462# From Arthur David Olson (2010-05-01):
2463# Use "Bahia_Banderas" to keep the name to fourteen characters.
2464
2465Zone America/Mazatlan   -7:05:40 -      LMT     1921 Dec 31 23:54:20
2466                        -7:00   -       MST     1927 Jun 10 23:00
2467                        -6:00   -       CST     1930 Nov 15
2468                        -7:00   -       MST     1931 May  1 23:00
2469                        -6:00   -       CST     1931 Oct
2470                        -7:00   -       MST     1932 Apr  1
2471                        -6:00   -       CST     1942 Apr 24
2472                        -7:00   -       MST     1949 Jan 14
2473                        -8:00   -       PST     1970
2474                        -7:00   Mexico  M%sT
2475
2476Zone America/Bahia_Banderas     -7:01:00 -      LMT     1921 Dec 31 23:59:00
2477                        -7:00   -       MST     1927 Jun 10 23:00
2478                        -6:00   -       CST     1930 Nov 15
2479                        -7:00   -       MST     1931 May  1 23:00
2480                        -6:00   -       CST     1931 Oct
2481                        -7:00   -       MST     1932 Apr  1
2482                        -6:00   -       CST     1942 Apr 24
2483                        -7:00   -       MST     1949 Jan 14
2484                        -8:00   -       PST     1970
2485                        -7:00   Mexico  M%sT    2010 Apr 4 2:00
2486                        -6:00   Mexico  C%sT
2487
2488# Baja California (near US border)
2489Zone America/Tijuana    -7:48:04 -      LMT     1922 Jan  1  0:11:56
2490                        -7:00   -       MST     1924
2491                        -8:00   -       PST     1927 Jun 10 23:00
2492                        -7:00   -       MST     1930 Nov 15
2493                        -8:00   -       PST     1931 Apr  1
2494                        -8:00   1:00    PDT     1931 Sep 30
2495                        -8:00   -       PST     1942 Apr 24
2496                        -8:00   1:00    PWT     1945 Aug 14 23:00u
2497                        -8:00   1:00    PPT     1945 Nov 12 # Peace
2498                        -8:00   -       PST     1948 Apr  5
2499                        -8:00   1:00    PDT     1949 Jan 14
2500                        -8:00   -       PST     1954
2501                        -8:00   CA      P%sT    1961
2502                        -8:00   -       PST     1976
2503                        -8:00   US      P%sT    1996
2504                        -8:00   Mexico  P%sT    2001
2505                        -8:00   US      P%sT    2002 Feb 20
2506                        -8:00   Mexico  P%sT    2010
2507                        -8:00   US      P%sT
2508# Baja California (away from US border)
2509Zone America/Santa_Isabel       -7:39:28 -      LMT     1922 Jan  1  0:20:32
2510                        -7:00   -       MST     1924
2511                        -8:00   -       PST     1927 Jun 10 23:00
2512                        -7:00   -       MST     1930 Nov 15
2513                        -8:00   -       PST     1931 Apr  1
2514                        -8:00   1:00    PDT     1931 Sep 30
2515                        -8:00   -       PST     1942 Apr 24
2516                        -8:00   1:00    PWT     1945 Aug 14 23:00u
2517                        -8:00   1:00    PPT     1945 Nov 12 # Peace
2518                        -8:00   -       PST     1948 Apr  5
2519                        -8:00   1:00    PDT     1949 Jan 14
2520                        -8:00   -       PST     1954
2521                        -8:00   CA      P%sT    1961
2522                        -8:00   -       PST     1976
2523                        -8:00   US      P%sT    1996
2524                        -8:00   Mexico  P%sT    2001
2525                        -8:00   US      P%sT    2002 Feb 20
2526                        -8:00   Mexico  P%sT
2527# From Paul Eggert (2006-03-22):
2528# Formerly there was an America/Ensenada zone, which differed from
2529# America/Tijuana only in that it did not observe DST from 1976
2530# through 1995.  This was as per Shanks (1999).  But Shanks & Pottenger say
2531# Ensenada did not observe DST from 1948 through 1975.  Guy Harris reports
2532# that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and
2533# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that
2534# DST-observance was a town-by-town matter back then.  This concerns
2535# data after 1970 so most likely there should be at least one Zone
2536# other than America/Tijuana for Baja, but it's not clear yet what its
2537# name or contents should be.
2538#
2539# Revillagigedo Is
2540# no information
2541
2542###############################################################################
2543
2544# Anguilla
2545# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
2546Zone America/Anguilla   -4:12:16 -      LMT     1912 Mar 2
2547                        -4:00   -       AST
2548
2549# Antigua and Barbuda
2550# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
2551Zone    America/Antigua -4:07:12 -      LMT     1912 Mar 2
2552                        -5:00   -       EST     1951
2553                        -4:00   -       AST
2554
2555# Bahamas
2556#
2557# From Sue Williams (2006-12-07):
2558# The Bahamas announced about a month ago that they plan to change their DST
2559# rules to sync with the U.S. starting in 2007....
2560# http://www.jonesbahamas.com/?c=45&a=10412
2561
2562# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
2563Rule    Bahamas 1964    1975    -       Oct     lastSun 2:00    0       S
2564Rule    Bahamas 1964    1975    -       Apr     lastSun 2:00    1:00    D
2565# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
2566Zone    America/Nassau  -5:09:24 -      LMT     1912 Mar 2
2567                        -5:00   Bahamas E%sT    1976
2568                        -5:00   US      E%sT
2569
2570# Barbados
2571# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
2572Rule    Barb    1977    only    -       Jun     12      2:00    1:00    D
2573Rule    Barb    1977    1978    -       Oct     Sun>=1  2:00    0       S
2574Rule    Barb    1978    1980    -       Apr     Sun>=15 2:00    1:00    D
2575Rule    Barb    1979    only    -       Sep     30      2:00    0       S
2576Rule    Barb    1980    only    -       Sep     25      2:00    0       S
2577# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
2578Zone America/Barbados   -3:58:28 -      LMT     1924            # Bridgetown
2579                        -3:58:28 -      BMT     1932      # Bridgetown Mean Time
2580                        -4:00   Barb    A%sT
2581
2582# Belize
2583# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger.
2584# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
2585Rule    Belize  1918    1942    -       Oct     Sun>=2  0:00    0:30    HD
2586Rule    Belize  1919    1943    -       Feb     Sun>=9  0:00    0       S
2587Rule    Belize  1973    only    -       Dec      5      0:00    1:00    D
2588Rule    Belize  1974    only    -       Feb      9      0:00    0       S
2589Rule    Belize  1982    only    -       Dec     18      0:00    1:00    D
2590Rule    Belize  1983    only    -       Feb     12      0:00    0       S
2591# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
2592Zone    America/Belize  -5:52:48 -      LMT     1912 Apr
2593                        -6:00   Belize  C%sT
2594
2595# Bermuda
2596
2597# From Dan Jones, reporting in The Royal Gazette (2006-06-26):
2598
2599# Next year, however, clocks in the US will go forward on the second Sunday
2600# in March, until the first Sunday in November.  And, after the Time Zone
2601# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on
2602# Friday, the same thing will happen in Bermuda.
2603# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135
2604
2605# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
2606Zone Atlantic/Bermuda   -4:19:04 -      LMT     1930 Jan  1 2:00    # Hamilton
2607                        -4:00   -       AST     1974 Apr 28 2:00
2608                        -4:00   Bahamas A%sT    1976
2609                        -4:00   US      A%sT
2610
2611# Cayman Is
2612# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
2613Zone    America/Cayman  -5:25:32 -      LMT     1890            # Georgetown
2614                        -5:07:12 -      KMT     1912 Feb    # Kingston Mean Time
2615                        -5:00   -       EST
2616
2617# Costa Rica
2618# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
2619Rule    CR      1979    1980    -       Feb     lastSun 0:00    1:00    D
2620Rule    CR      1979    1980    -       Jun     Sun>=1  0:00    0       S
2621Rule    CR      1991    1992    -       Jan     Sat>=15 0:00    1:00    D
2622# IATA SSIM (1991-09) says the following was at 1:00;
2623# go with Shanks & Pottenger.
2624Rule    CR      1991    only    -       Jul      1      0:00    0       S
2625Rule    CR      1992    only    -       Mar     15      0:00    0       S
2626# There are too many San Joses elsewhere, so we'll use `Costa Rica'.
2627# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
2628Zone America/Costa_Rica -5:36:20 -      LMT     1890            # San Jose
2629                        -5:36:20 -      SJMT    1921 Jan 15 # San Jose Mean Time
2630                        -6:00   CR      C%sT
2631# Coco
2632# no information; probably like America/Costa_Rica
2633
2634# Cuba
2635
2636# From Arthur David Olson (1999-03-29):
2637# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between
2638# the Cuban National Team and the Baltimore Orioles was carried live on
2639# the Orioles Radio Network, including affiliate WTOP in Washington, DC.
2640# During the game, play-by-play announcer Jim Hunter noted that
2641# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving
2642# Time today."  (The "two hour" remark referred to losing one hour of
2643# sleep on 1999-03-28--when the announcers were in Cuba as it switched
2644# to DST--and one more hour on 1999-04-04--when the announcers will have
2645# returned to Baltimore, which switches on that date.)
2646
2647# From Evert van der Veer via Steffen Thorsen (2004-10-28):
2648# Cuba is not going back to standard time this year.
2649# From Paul Eggert (2006-03-22):
2650# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html
2651# says that it's due to a problem at the Antonio Guiteras
2652# thermoelectric plant, and says "This October there will be no return
2653# to normal hours (after daylight saving time)".
2654# For now, let's assume that it's a temporary measure.
2655
2656# From Carlos A. Carnero Delgado (2005-11-12):
2657# This year (just like in 2004-2005) there's no change in time zone
2658# adjustment in Cuba.  We will stay in daylight saving time:
2659# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html
2660
2661# From Jesper Norgaard Welen (2006-10-21):
2662# An article in GRANMA INTERNACIONAL claims that Cuba will end
2663# the 3 years of permanent DST next weekend, see
2664# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html
2665# "On Saturday night, October 28 going into Sunday, October 29, at 01:00,
2666# watches should be set back one hour -- going back to 00:00 hours -- returning
2667# to the normal schedule....
2668
2669# From Paul Eggert (2007-03-02):
2670# http://www.granma.cubaweb.cu/english/news/art89.html, dated yesterday,
2671# says Cuban clocks will advance at midnight on March 10.
2672# For lack of better information, assume Cuba will use US rules,
2673# except that it switches at midnight standard time as usual.
2674#
2675# From Steffen Thorsen (2007-10-25):
2676# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week
2677# earlier - on the last Sunday of October, just like in 2006.
2678#
2679# He supplied these references:
2680#
2681# http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES
2682# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm
2683#
2684# From Alex Kryvenishev (2007-10-25):
2685# Here is also article from Granma (Cuba):
2686#
2687# [Regira] el Horario Normal desde el [proximo] domingo 28 de octubre
2688# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html
2689#
2690# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html
2691
2692# From Arthur David Olson (2008-03-09):
2693# I'm in Maryland which is now observing United States Eastern Daylight
2694# Time. At 9:44 local time I used RealPlayer to listen to
2695# <a href="http://media.enet.cu/radioreloj">
2696# http://media.enet.cu/radioreloj
2697# </a>, a Cuban information station, and heard
2698# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"),
2699# indicating that Cuba is still on standard time.
2700
2701# From Steffen Thorsen (2008-03-12):
2702# It seems that Cuba will start DST on Sunday, 2007-03-16...
2703# It was announced yesterday, according to this source (in Spanish):
2704# <a href="http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm">
2705# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm
2706# </a>
2707#
2708# Some more background information is posted here:
2709# <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html">
2710# http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html
2711# </a>
2712#
2713# The article also says that Cuba has been observing DST since 1963,
2714# while Shanks (and tzdata) has 1965 as the first date (except in the
2715# 1940's). Many other web pages in Cuba also claim that it has been
2716# observed since 1963, but with the exception of 1970 - an exception
2717# which is not present in tzdata/Shanks. So there is a chance we need to
2718# change some historic records as well.
2719#
2720# One example:
2721# <a href="http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm">
2722# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm
2723# </a>
2724
2725# From Jesper Norgaard Welen (2008-03-13):
2726# The Cuban time change has just been confirmed on the most authoritative
2727# web site, the Granma.  Please check out
2728# <a href="http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html">
2729# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html
2730# </a>
2731#
2732# Basically as expected after Steffen Thorsens information, the change
2733# will take place midnight between Saturday and Sunday.
2734
2735# From Arthur David Olson (2008-03-12):
2736# Assume Sun>=15 (third Sunday) going forward.
2737
2738# From Alexander Krivenyshev (2009-03-04)
2739# According to the Radio Reloj - Cuba will start Daylight Saving Time on
2740# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009-
2741# not on midnight March 14 / March 15 as previously thought.
2742#
2743# <a href="http://www.worldtimezone.com/dst_news/dst_news_cuba05.html">
2744# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html
2745# (in Spanish)
2746# </a>
2747
2748# From Arthur David Olson (2009-03-09)
2749# I listened over the Internet to
2750# <a href="http://media.enet.cu/readioreloj">
2751# http://media.enet.cu/readioreloj
2752# </a>
2753# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the
2754# the time was announced as "diez cinco"--the same time as here, indicating
2755# that has indeed switched to DST. Assume second Sunday from 2009 forward.
2756
2757# From Steffen Thorsen (2011-03-08):
2758# Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00
2759# this year. Nothing about the end date known so far (if that has
2760# changed at all).
2761#
2762# Source:
2763# <a href="http://granma.co.cu/2011/03/08/nacional/artic01.html">
2764# http://granma.co.cu/2011/03/08/nacional/artic01.html
2765# </a>
2766#
2767# Our info:
2768# <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html">
2769# http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html
2770# </a>
2771#
2772# From Steffen Thorsen (2011-10-30)
2773# Cuba will end DST two weeks later this year. Instead of going back
2774# tonight, it has been delayed to 2011-11-13 at 01:00.
2775#
2776# One source (Spanish)
2777# <a href="http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html">
2778# http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html
2779# </a>
2780#
2781# Our page:
2782# <a href="http://www.timeanddate.com/news/time/cuba-time-changes-2011.html">
2783# http://www.timeanddate.com/news/time/cuba-time-changes-2011.html
2784# </a>
2785#
2786# From Steffen Thorsen (2012-03-01)
2787# According to Radio Reloj, Cuba will start DST on Midnight between March
2788# 31 and April 1.
2789#
2790# Radio Reloj has the following info (Spanish):
2791# <a href="http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril">
2792# http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril
2793# </a>
2794#
2795# Our info on it:
2796# <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html">
2797# http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html
2798# </a>
2799
2800# From Steffen Thorsen (2012-11-03):
2801# Radio Reloj and many other sources report that Cuba is changing back
2802# to standard time on 2012-11-04:
2803# http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre
2804# From Paul Eggert (2012-11-03):
2805# For now, assume the future rule is first Sunday in November.
2806
2807# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
2808Rule    Cuba    1928    only    -       Jun     10      0:00    1:00    D
2809Rule    Cuba    1928    only    -       Oct     10      0:00    0       S
2810Rule    Cuba    1940    1942    -       Jun     Sun>=1  0:00    1:00    D
2811Rule    Cuba    1940    1942    -       Sep     Sun>=1  0:00    0       S
2812Rule    Cuba    1945    1946    -       Jun     Sun>=1  0:00    1:00    D
2813Rule    Cuba    1945    1946    -       Sep     Sun>=1  0:00    0       S
2814Rule    Cuba    1965    only    -       Jun     1       0:00    1:00    D
2815Rule    Cuba    1965    only    -       Sep     30      0:00    0       S
2816Rule    Cuba    1966    only    -       May     29      0:00    1:00    D
2817Rule    Cuba    1966    only    -       Oct     2       0:00    0       S
2818Rule    Cuba    1967    only    -       Apr     8       0:00    1:00    D
2819Rule    Cuba    1967    1968    -       Sep     Sun>=8  0:00    0       S
2820Rule    Cuba    1968    only    -       Apr     14      0:00    1:00    D
2821Rule    Cuba    1969    1977    -       Apr     lastSun 0:00    1:00    D
2822Rule    Cuba    1969    1971    -       Oct     lastSun 0:00    0       S
2823Rule    Cuba    1972    1974    -       Oct     8       0:00    0       S
2824Rule    Cuba    1975    1977    -       Oct     lastSun 0:00    0       S
2825Rule    Cuba    1978    only    -       May     7       0:00    1:00    D
2826Rule    Cuba    1978    1990    -       Oct     Sun>=8  0:00    0       S
2827Rule    Cuba    1979    1980    -       Mar     Sun>=15 0:00    1:00    D
2828Rule    Cuba    1981    1985    -       May     Sun>=5  0:00    1:00    D
2829Rule    Cuba    1986    1989    -       Mar     Sun>=14 0:00    1:00    D
2830Rule    Cuba    1990    1997    -       Apr     Sun>=1  0:00    1:00    D
2831Rule    Cuba    1991    1995    -       Oct     Sun>=8  0:00s   0       S
2832Rule    Cuba    1996    only    -       Oct      6      0:00s   0       S
2833Rule    Cuba    1997    only    -       Oct     12      0:00s   0       S
2834Rule    Cuba    1998    1999    -       Mar     lastSun 0:00s   1:00    D
2835Rule    Cuba    1998    2003    -       Oct     lastSun 0:00s   0       S
2836Rule    Cuba    2000    2004    -       Apr     Sun>=1  0:00s   1:00    D
2837Rule    Cuba    2006    2010    -       Oct     lastSun 0:00s   0       S
2838Rule    Cuba    2007    only    -       Mar     Sun>=8  0:00s   1:00    D
2839Rule    Cuba    2008    only    -       Mar     Sun>=15 0:00s   1:00    D
2840Rule    Cuba    2009    2010    -       Mar     Sun>=8  0:00s   1:00    D
2841Rule    Cuba    2011    only    -       Mar     Sun>=15 0:00s   1:00    D
2842Rule    Cuba    2011    only    -       Nov     13      0:00s   0       S
2843Rule    Cuba    2012    only    -       Apr     1       0:00s   1:00    D
2844Rule    Cuba    2012    max     -       Nov     Sun>=1  0:00s   0       S
2845Rule    Cuba    2013    max     -       Mar     Sun>=8  0:00s   1:00    D
2846
2847# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
2848Zone    America/Havana  -5:29:28 -      LMT     1890
2849                        -5:29:36 -      HMT     1925 Jul 19 12:00 # Havana MT
2850                        -5:00   Cuba    C%sT
2851
2852# Dominica
2853# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
2854Zone America/Dominica   -4:05:36 -      LMT     1911 Jul 1 0:01         # Roseau
2855                        -4:00   -       AST
2856
2857# Dominican Republic
2858
2859# From Steffen Thorsen (2000-10-30):
2860# Enrique Morales reported to me that the Dominican Republic has changed the
2861# time zone to Eastern Standard Time as of Sunday 29 at 2 am....
2862# http://www.listin.com.do/antes/261000/republica/princi.html
2863
2864# From Paul Eggert (2000-12-04):
2865# That URL (2000-10-26, in Spanish) says they planned to use US-style DST.
2866
2867# From Rives McDow (2000-12-01):
2868# Dominican Republic changed its mind and presidential decree on Tuesday,
2869# November 28, 2000, with a new decree.  On Sunday, December 3 at 1:00 AM the
2870# Dominican Republic will be reverting to 8 hours from the International Date
2871# Line, and will not be using DST in the foreseeable future.  The reason they
2872# decided to use DST was to be in synch with Puerto Rico, who was also going
2873# to implement DST.  When Puerto Rico didn't implement DST, the president
2874# decided to revert.
2875
2876
2877# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
2878Rule    DR      1966    only    -       Oct     30      0:00    1:00    D
2879Rule    DR      1967    only    -       Feb     28      0:00    0       S
2880Rule    DR      1969    1973    -       Oct     lastSun 0:00    0:30    HD
2881Rule    DR      1970    only    -       Feb     21      0:00    0       S
2882Rule    DR      1971    only    -       Jan     20      0:00    0       S
2883Rule    DR      1972    1974    -       Jan     21      0:00    0       S
2884# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
2885Zone America/Santo_Domingo -4:39:36 -   LMT     1890
2886                        -4:40   -       SDMT    1933 Apr  1 12:00 # S. Dom. MT
2887                        -5:00   DR      E%sT    1974 Oct 27
2888                        -4:00   -       AST     2000 Oct 29 02:00
2889                        -5:00   US      E%sT    2000 Dec  3 01:00
2890                        -4:00   -       AST
2891
2892# El Salvador
2893
2894# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
2895Rule    Salv    1987    1988    -       May     Sun>=1  0:00    1:00    D
2896Rule    Salv    1987    1988    -       Sep     lastSun 0:00    0       S
2897# There are too many San Salvadors elsewhere, so use America/El_Salvador
2898# instead of America/San_Salvador.
2899# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
2900Zone America/El_Salvador -5:56:48 -     LMT     1921            # San Salvador
2901                        -6:00   Salv    C%sT
2902
2903# Grenada
2904# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
2905Zone    America/Grenada -4:07:00 -      LMT     1911 Jul        # St George's
2906                        -4:00   -       AST
2907
2908# Guadeloupe
2909# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
2910Zone America/Guadeloupe -4:06:08 -      LMT     1911 Jun 8      # Pointe a Pitre
2911                        -4:00   -       AST
2912# St Barthelemy
2913Link America/Guadeloupe America/St_Barthelemy
2914# St Martin (French part)
2915Link America/Guadeloupe America/Marigot
2916
2917# Guatemala
2918#
2919# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen:
2920# Diario Co Latino, at
2921# http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079,
2922# says in an article dated 2006-04-19 that the Guatemalan government had
2923# decided on that date to advance official time by 60 minutes, to lessen the
2924# impact of the elevated cost of oil....  Daylight saving time will last from
2925# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified).
2926# From Paul Eggert (2006-06-22):
2927# The Ministry of Energy and Mines, press release CP-15/2006
2928# (2006-04-19), says DST ends at 24:00.  See
2929# <http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf>.
2930
2931# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
2932Rule    Guat    1973    only    -       Nov     25      0:00    1:00    D
2933Rule    Guat    1974    only    -       Feb     24      0:00    0       S
2934Rule    Guat    1983    only    -       May     21      0:00    1:00    D
2935Rule    Guat    1983    only    -       Sep     22      0:00    0       S
2936Rule    Guat    1991    only    -       Mar     23      0:00    1:00    D
2937Rule    Guat    1991    only    -       Sep      7      0:00    0       S
2938Rule    Guat    2006    only    -       Apr     30      0:00    1:00    D
2939Rule    Guat    2006    only    -       Oct      1      0:00    0       S
2940# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
2941Zone America/Guatemala  -6:02:04 -      LMT     1918 Oct 5
2942                        -6:00   Guat    C%sT
2943
2944# Haiti
2945# From Gwillim Law (2005-04-15):
2946# Risto O. Nykanen wrote me that Haiti is now on DST.
2947# I searched for confirmation, and I found a
2948# <a href="http://www.haitianconsulate.org/time.doc"> press release
2949# on the Web page of the Haitian Consulate in Chicago (2005-03-31),
2950# </a>.  Translated from French, it says:
2951#
2952#  "The Prime Minister's Communication Office notifies the public in general
2953#   and the press in particular that, following a decision of the Interior
2954#   Ministry and the Territorial Collectivities [I suppose that means the
2955#   provinces], Haiti will move to Eastern Daylight Time in the night from next
2956#   Saturday the 2nd to Sunday the 3rd.
2957#
2958#  "Consequently, the Prime Minister's Communication Office wishes to inform
2959#   the population that the country's clocks will be set forward one hour
2960#   starting at midnight.  This provision will hold until the last Saturday in
2961#   October 2005.
2962#
2963#  "Port-au-Prince, March 31, 2005"
2964#
2965# From Steffen Thorsen (2006-04-04):
2966# I have been informed by users that Haiti observes DST this year like
2967# last year, so the current "only" rule for 2005 might be changed to a
2968# "max" rule or to last until 2006. (Who knows if they will observe DST
2969# next year or if they will extend their DST like US/Canada next year).
2970#
2971# I have found this article about it (in French):
2972# http://www.haitipressnetwork.com/news.cfm?articleID=7612
2973#
2974# The reason seems to be an energy crisis.
2975
2976# From Stephen Colebourne (2007-02-22):
2977# Some IATA info: Haiti won't be having DST in 2007.
2978
2979# From Steffen Thorsen (2012-03-11):
2980# According to several news sources, Haiti will observe DST this year,
2981# apparently using the same start and end date as USA/Canada.
2982# So this means they have already changed their time.
2983#
2984# (Sources in French):
2985# <a href="http://www.alterpresse.org/spip.php?article12510">
2986# http://www.alterpresse.org/spip.php?article12510
2987# </a>
2988# <a href="http://radiovision2000haiti.net/home/?p=13253">
2989# http://radiovision2000haiti.net/home/?p=13253
2990# </a>
2991#
2992# Our coverage:
2993# <a href="http://www.timeanddate.com/news/time/haiti-dst-2012.html">
2994# http://www.timeanddate.com/news/time/haiti-dst-2012.html
2995# </a>
2996
2997# From Arthur David Olson (2012-03-11):
2998# The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to
2999# 3:00 a.m. rather than the traditional Haitian jump at midnight.
3000# Assume a US-style fall back as well XXX.
3001# Do not yet assume that the change carries forward past 2012 XXX.
3002
3003# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
3004Rule    Haiti   1983    only    -       May     8       0:00    1:00    D
3005Rule    Haiti   1984    1987    -       Apr     lastSun 0:00    1:00    D
3006Rule    Haiti   1983    1987    -       Oct     lastSun 0:00    0       S
3007# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s.
3008# Go with IATA.
3009Rule    Haiti   1988    1997    -       Apr     Sun>=1  1:00s   1:00    D
3010Rule    Haiti   1988    1997    -       Oct     lastSun 1:00s   0       S
3011Rule    Haiti   2005    2006    -       Apr     Sun>=1  0:00    1:00    D
3012Rule    Haiti   2005    2006    -       Oct     lastSun 0:00    0       S
3013Rule    Haiti   2012    only    -       Mar     Sun>=8  2:00    1:00    D
3014Rule    Haiti   2012    only    -       Nov     Sun>=1  2:00    0       S
3015# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
3016Zone America/Port-au-Prince -4:49:20 -  LMT     1890
3017                        -4:49   -       PPMT    1917 Jan 24 12:00 # P-a-P MT
3018                        -5:00   Haiti   E%sT
3019
3020# Honduras
3021# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1.
3022
3023# From Paul Eggert (2006-05-05):
3024# worldtimezone.com reports a 2006-05-02 Spanish-language AP article
3025# saying Honduras will start using DST midnight Saturday, effective 4
3026# months until September.  La Tribuna reported today
3027# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president
3028# of Honduras, refused to back down on this.
3029
3030# From Jesper Norgaard Welen (2006-08-08):
3031# It seems that Honduras has returned from DST to standard time this Monday at
3032# 00:00 hours (prolonging Sunday to 25 hours duration).
3033# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html
3034
3035# From Paul Eggert (2006-08-08):
3036# Also see Diario El Heraldo, The country returns to standard time (2006-08-08)
3037# <http://www.elheraldo.hn/nota.php?nid=54941&sec=12>.
3038# It mentions executive decree 18-2006.
3039
3040# From Steffen Thorsen (2006-08-17):
3041# Honduras will observe DST from 2007 to 2009, exact dates are not
3042# published, I have located this authoritative source:
3043# http://www.presidencia.gob.hn/noticia.aspx?nId=47
3044
3045# From Steffen Thorsen (2007-03-30):
3046# http://www.laprensahn.com/pais_nota.php?id04962=7386
3047# So it seems that Honduras will not enter DST this year....
3048
3049# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
3050Rule    Hond    1987    1988    -       May     Sun>=1  0:00    1:00    D
3051Rule    Hond    1987    1988    -       Sep     lastSun 0:00    0       S
3052Rule    Hond    2006    only    -       May     Sun>=1  0:00    1:00    D
3053Rule    Hond    2006    only    -       Aug     Mon>=1  0:00    0       S
3054# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
3055Zone America/Tegucigalpa -5:48:52 -     LMT     1921 Apr
3056                        -6:00   Hond    C%sT
3057#
3058# Great Swan I ceded by US to Honduras in 1972
3059
3060# Jamaica
3061
3062# From Bob Devine (1988-01-28):
3063# Follows US rules.
3064
3065# From U. S. Naval Observatory (1989-01-19):
3066# JAMAICA             5 H  BEHIND UTC
3067
3068# From Shanks & Pottenger:
3069# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
3070Zone    America/Jamaica -5:07:12 -      LMT     1890            # Kingston
3071                        -5:07:12 -      KMT     1912 Feb    # Kingston Mean Time
3072                        -5:00   -       EST     1974 Apr 28 2:00
3073                        -5:00   US      E%sT    1984
3074                        -5:00   -       EST
3075
3076# Martinique
3077# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
3078Zone America/Martinique -4:04:20 -      LMT     1890            # Fort-de-France
3079                        -4:04:20 -      FFMT    1911 May     # Fort-de-France MT
3080                        -4:00   -       AST     1980 Apr  6
3081                        -4:00   1:00    ADT     1980 Sep 28
3082                        -4:00   -       AST
3083
3084# Montserrat
3085# From Paul Eggert (2006-03-22):
3086# In 1995 volcanic eruptions forced evacuation of Plymouth, the capital.
3087# world.gazetteer.com says Cork Hill is the most populous location now.
3088# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
3089Zone America/Montserrat -4:08:52 -      LMT     1911 Jul 1 0:01   # Cork Hill
3090                        -4:00   -       AST
3091
3092# Nicaragua
3093#
3094# This uses Shanks & Pottenger for times before 2005.
3095#
3096# From Steffen Thorsen (2005-04-12):
3097# I've got reports from 8 different people that Nicaragua just started
3098# DST on Sunday 2005-04-10, in order to save energy because of
3099# expensive petroleum.  The exact end date for DST is not yet
3100# announced, only "September" but some sites also say "mid-September".
3101# Some background information is available on the President's official site:
3102# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm
3103# The Decree, no 23-2005 is available here:
3104# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2005/Decreto%2023-2005%20Se%20adelanta%20en%20una%20hora%20en%20todo%20el%20territorio%20nacional%20apartir%20de%20las%2024horas%20del%2009%20de%20Abril.pdf
3105#
3106# From Paul Eggert (2005-05-01):
3107# The decree doesn't say anything about daylight saving, but for now let's
3108# assume that it is daylight saving....
3109#
3110# From Gwillim Law (2005-04-21):
3111# The Associated Press story on the time change, which can be found at
3112# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html
3113# and elsewhere, says (fifth paragraph, translated from Spanish):  "The last
3114# time that a change of clocks was applied to save energy was in the year 2000
3115# during the Arnoldo Aleman administration."...
3116# The northamerica file says that Nicaragua has been on UTC-6 continuously
3117# since December 1998.  I wasn't able to find any details of Nicaraguan time
3118# changes in 2000.  Perhaps a note could be added to the northamerica file, to
3119# the effect that we have indirect evidence that DST was observed in 2000.
3120#
3121# From Jesper Norgaard Welen (2005-11-02):
3122# Nicaragua left DST the 2005-10-02 at 00:00 (local time).
3123# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm
3124# (2005-09-26)
3125#
3126# From Jesper Norgaard Welen (2006-05-05):
3127# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410
3128# (my informal translation)
3129# By order of the president of the republic, Enrique Bolanos, Nicaragua
3130# advanced by sixty minutes their official time, yesterday at 2 in the
3131# morning, and will stay that way until 30.th. of september.
3132#
3133# From Jesper Norgaard Welen (2006-09-30):
3134# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf
3135# My informal translation runs:
3136# The natural sun time is restored in all the national territory, in that the
3137# time is returned one hour at 01:00 am of October 1 of 2006.
3138#
3139# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
3140Rule    Nic     1979    1980    -       Mar     Sun>=16 0:00    1:00    D
3141Rule    Nic     1979    1980    -       Jun     Mon>=23 0:00    0       S
3142Rule    Nic     2005    only    -       Apr     10      0:00    1:00    D
3143Rule    Nic     2005    only    -       Oct     Sun>=1  0:00    0       S
3144Rule    Nic     2006    only    -       Apr     30      2:00    1:00    D
3145Rule    Nic     2006    only    -       Oct     Sun>=1  1:00    0       S
3146# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
3147Zone    America/Managua -5:45:08 -      LMT     1890
3148                        -5:45:12 -      MMT     1934 Jun 23 # Managua Mean Time?
3149                        -6:00   -       CST     1973 May
3150                        -5:00   -       EST     1975 Feb 16
3151                        -6:00   Nic     C%sT    1992 Jan  1 4:00
3152                        -5:00   -       EST     1992 Sep 24
3153                        -6:00   -       CST     1993
3154                        -5:00   -       EST     1997
3155                        -6:00   Nic     C%sT
3156
3157# Panama
3158# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
3159Zone    America/Panama  -5:18:08 -      LMT     1890
3160                        -5:19:36 -      CMT     1908 Apr 22   # Colon Mean Time
3161                        -5:00   -       EST
3162
3163# Puerto Rico
3164# There are too many San Juans elsewhere, so we'll use `Puerto_Rico'.
3165# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
3166Zone America/Puerto_Rico -4:24:25 -     LMT     1899 Mar 28 12:00    # San Juan
3167                        -4:00   -       AST     1942 May  3
3168                        -4:00   US      A%sT    1946
3169                        -4:00   -       AST
3170
3171# St Kitts-Nevis
3172# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
3173Zone America/St_Kitts   -4:10:52 -      LMT     1912 Mar 2      # Basseterre
3174                        -4:00   -       AST
3175
3176# St Lucia
3177# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
3178Zone America/St_Lucia   -4:04:00 -      LMT     1890            # Castries
3179                        -4:04:00 -      CMT     1912        # Castries Mean Time
3180                        -4:00   -       AST
3181
3182# St Pierre and Miquelon
3183# There are too many St Pierres elsewhere, so we'll use `Miquelon'.
3184# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
3185Zone America/Miquelon   -3:44:40 -      LMT     1911 May 15     # St Pierre
3186                        -4:00   -       AST     1980 May
3187                        -3:00   -       PMST    1987 # Pierre & Miquelon Time
3188                        -3:00   Canada  PM%sT
3189
3190# St Vincent and the Grenadines
3191# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
3192Zone America/St_Vincent -4:04:56 -      LMT     1890            # Kingstown
3193                        -4:04:56 -      KMT     1912       # Kingstown Mean Time
3194                        -4:00   -       AST
3195
3196# Turks and Caicos
3197#
3198# From Chris Dunn in
3199# <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007>
3200# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the
3201# daylight saving dates for time changes have been adjusted to match
3202# the recent U.S. change of dates.
3203#
3204# From Brian Inglis (2007-04-28):
3205# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26]
3206# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three
3207# rows before that there is an out of date entry for Oct:
3208# "Eastern Standard Times Begins 2007
3209# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time"
3210# indicating that the normal ET rules are followed.
3211#
3212# From Paul Eggert (2006-05-01):
3213# Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998)
3214# says they switch at midnight.  Go with Shanks & Pottenger.
3215#
3216# Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
3217Rule    TC      1979    1986    -       Apr     lastSun 2:00    1:00    D
3218Rule    TC      1979    2006    -       Oct     lastSun 2:00    0       S
3219Rule    TC      1987    2006    -       Apr     Sun>=1  2:00    1:00    D
3220Rule    TC      2007    max     -       Mar     Sun>=8  2:00    1:00    D
3221Rule    TC      2007    max     -       Nov     Sun>=1  2:00    0       S
3222# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
3223Zone America/Grand_Turk -4:44:32 -      LMT     1890
3224                        -5:07:12 -      KMT     1912 Feb    # Kingston Mean Time
3225                        -5:00   TC      E%sT
3226
3227# British Virgin Is
3228# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
3229Zone America/Tortola    -4:18:28 -      LMT     1911 Jul    # Road Town
3230                        -4:00   -       AST
3231
3232# Virgin Is
3233# Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
3234Zone America/St_Thomas  -4:19:44 -      LMT     1911 Jul    # Charlotte Amalie
3235                        -4:00   -       AST
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