Sync zoneinfo database with tzdata2011b from elsie.nci.nih.gov
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34850bd5 1# <pre>
456e9ea2 2# @(#)northamerica 8.40
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3# This file is in the public domain, so clarified as of
4# 2009-05-17 by Arthur David Olson.
34850bd5 5
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6# also includes Central America and the Caribbean
7
8# This data is by no means authoritative; if you think you know better,
9# go ahead and edit the file (and please send any changes to
10# tz@elsie.nci.nih.gov for general use in the future).
11
bc95ec93 12# From Paul Eggert (1999-03-22):
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13# A reliable and entertaining source about time zones is
14# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
15
16###############################################################################
17
18# United States
19
20# From Paul Eggert (1999-03-31):
21# Howse writes (pp 121-125) that time zones were invented by
22# Professor Charles Ferdinand Dowd (1825-1904),
23# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY).
24# His pamphlet ``A System of National Time for Railroads'' (1870)
25# was the result of his proposals at the Convention of Railroad Trunk Lines
26# in New York City (1869-10). His 1870 proposal was based on Washington, DC,
27# but in 1872-05 he moved the proposed origin to Greenwich.
28# His proposal was adopted by the railroads on 1883-11-18 at 12:00,
29# and the most of the country soon followed suit.
30
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31# From Paul Eggert (2005-04-16):
32# That 1883 transition occurred at 12:00 new time, not at 12:00 old time.
33# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005).
34
bd7414aa 35# From Paul Eggert (2006-03-22):
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36# A good source for time zone historical data in the US is
37# Thomas G. Shanks, The American Atlas (5th edition),
38# San Diego: ACS Publications, Inc. (1991).
39# Make sure you have the errata sheet; the book is somewhat useless without it.
bd7414aa 40# It is the source for most of the pre-1991 US entries below.
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41
42# From Paul Eggert (2001-03-06):
43# Daylight Saving Time was first suggested as a joke by Benjamin Franklin
44# in his whimsical essay ``An Economical Project for Diminishing the Cost
45# of Light'' published in the Journal de Paris (1784-04-26).
46# Not everyone is happy with the results:
47#
48# I don't really care how time is reckoned so long as there is some
49# agreement about it, but I object to being told that I am saving
50# daylight when my reason tells me that I am doing nothing of the kind.
51# I even object to the implication that I am wasting something
52# valuable if I stay in bed after the sun has risen. As an admirer
53# of moonlight I resent the bossy insistence of those who want to
54# reduce my time for enjoying it. At the back of the Daylight Saving
55# scheme I detect the bony, blue-fingered hand of Puritanism, eager
56# to push people into bed earlier, and get them up earlier, to make
57# them healthy, wealthy and wise in spite of themselves.
58#
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59# -- Robertson Davies, The diary of Samuel Marchbanks,
60# Clarke, Irwin (1947), XIX, Sunday
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61#
62# For more about the first ten years of DST in the United States, see
63# Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html">
64# Ten years of daylight saving from the Pittsburgh standpoint
65# (Carnegie Library of Pittsburgh, 1927)</a>.
66#
67# Shanks says that DST was called "War Time" in the US in 1918 and 1919.
68# However, DST was imposed by the Standard Time Act of 1918, which
69# was the first nationwide legal time standard, and apparently
70# time was just called "Standard Time" or "Daylight Saving Time".
71
72# From Arthur David Olson:
73# US Daylight Saving Time ended on the last Sunday of *October* in 1974.
74# See, for example, the front page of the Saturday, 1974-10-26
75# and Sunday, 1974-10-27 editions of the Washington Post.
76
77# From Arthur David Olson:
78# Before the Uniform Time Act of 1966 took effect in 1967, observance of
79# Daylight Saving Time in the US was by local option, except during wartime.
80
81# From Arthur David Olson (2000-09-25):
82# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama.
83# In the introduction, Oboler spoke of "Eastern Peace Time."
84# An AltaVista search turned up
85# <a href="http://rowayton.org/rhs/hstaug45.html">:
86# "When the time is announced over the radio now, it is 'Eastern Peace
87# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful."
88# </a> (August 1945) by way of confirmation.
89
9ffe4b14 90# From Joseph Gallant citing
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91# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):
92# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set
93# to switch to London for Attlee's address, but the American people
94# never got to hear his speech live. According to one press account,
95# CBS' Bob Trout was first to announce the word of Japan's surrender,
96# but a few seconds later, NBC, ABC and Mutual also flashed the word
97# of surrender, all of whom interrupting the bells of Big Ben in
98# London which were to precede Mr. Attlee's speech.
99
100# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From
101# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times:
102#
103# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender.
104# Any announcement from Asia would reach St. John's New York newsroom on a
105# wire service teletype machine, which had prescribed signals for major news.
106# Associated Press, for example, would ring five bells before spewing out
107# typed copy of an important story, and 10 bells for news "of transcendental
108# importance."
109#
110# On Aug. 14, stalling while talking steadily into the NBC networks' open
111# microphone, St. John heard five bells and waited only to hear a sixth bell,
112# before announcing confidently: "Ladies and gentlemen, World War II is over.
113# The Japanese have agreed to our surrender terms."
114#
115# He had scored a 20-second scoop on other broadcasters.
116
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117# From Arthur David Olson (2005-08-22):
118# Paul has been careful to use the "US" rules only in those locations
119# that are part of the United States; this reflects the real scope of
120# U.S. government action. So even though the "US" rules have changed
121# in the latest release, other countries won't be affected.
122
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123# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
124Rule US 1918 1919 - Mar lastSun 2:00 1:00 D
125Rule US 1918 1919 - Oct lastSun 2:00 0 S
126Rule US 1942 only - Feb 9 2:00 1:00 W # War
127Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace
128Rule US 1945 only - Sep 30 2:00 0 S
9ffe4b14 129Rule US 1967 2006 - Oct lastSun 2:00 0 S
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130Rule US 1967 1973 - Apr lastSun 2:00 1:00 D
131Rule US 1974 only - Jan 6 2:00 1:00 D
132Rule US 1975 only - Feb 23 2:00 1:00 D
133Rule US 1976 1986 - Apr lastSun 2:00 1:00 D
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134Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D
135Rule US 2007 max - Mar Sun>=8 2:00 1:00 D
136Rule US 2007 max - Nov Sun>=1 2:00 0 S
984263bc 137
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138# From Arthur David Olson, 2005-12-19
139# We generate the files specified below to guard against old files with
140# obsolete information being left in the time zone binary directory.
141# We limit the list to names that have appeared in previous versions of
142# this time zone package.
143# We do these as separate Zones rather than as Links to avoid problems if
144# a particular place changes whether it observes DST.
145# We put these specifications here in the northamerica file both to
146# increase the chances that they'll actually get compiled and to
147# avoid the need to duplicate the US rules in another file.
148
149# Zone NAME GMTOFF RULES FORMAT [UNTIL]
150Zone EST -5:00 - EST
151Zone MST -7:00 - MST
152Zone HST -10:00 - HST
153Zone EST5EDT -5:00 US E%sT
154Zone CST6CDT -6:00 US C%sT
155Zone MST7MDT -7:00 US M%sT
156Zone PST8PDT -8:00 US P%sT
157
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158# From Bob Devine (1988-01-28):
159# ...Alaska (and Hawaii) had the timezone names changed in 1967.
160# old new
161# Pacific Standard Time(PST) -same-
162# Yukon Standard Time(YST) -same-
163# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST)
164# Nome Standard Time (NT) Bering Standard Time (BST)
165#
166# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz.
167# The YST zone now covers nearly all of the state, AHST just part
168# of the Aleutian islands. No DST.
169
170# From Paul Eggert (1995-12-19):
171# The tables below use `NST', not `NT', for Nome Standard Time.
172# I invented `CAWT' for Central Alaska War Time.
173
174# From U. S. Naval Observatory (1989-01-19):
175# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON
176# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30
177# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON
178# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30
179# USA MOUNTAIN 7 H BEHIND UTC DENVER
180# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30
181# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO
182# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30
183# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST)
184# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT)
185# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W
186# USA - " - 9 H BEHIND UTC APR 3 - OCT 30
187# USA HAWAII 10 H BEHIND UTC
188# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY
189
190# From Arthur David Olson (1989-01-21):
191# The above dates are for 1988.
192# Note the "AKST" and "AKDT" abbreviations, the claim that there's
193# no DST in Samoa, and the claim that there is DST in Alaska and the
194# Aleutians.
195
196# From Arthur David Olson (1988-02-13):
197# Legal standard time zone names, from United States Code (1982 Edition and
198# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names
199# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966
200# took effect), as explained in sections 263 and 261:
201# (none)
202# United States standard eastern time
203# United States standard mountain time
204# United States standard central time
205# United States standard Pacific time
206# (none)
207# United States standard Alaska time
208# (none)
209# Next, names from 1967-04-01 until 1983-11-30 (the date for
210# public law 98-181):
211# Atlantic standard time
212# eastern standard time
213# central standard time
214# mountain standard time
215# Pacific standard time
216# Yukon standard time
217# Alaska-Hawaii standard time
218# Bering standard time
219# And after 1983-11-30:
220# Atlantic standard time
221# eastern standard time
222# central standard time
223# mountain standard time
224# Pacific standard time
225# Alaska standard time
226# Hawaii-Aleutian standard time
227# Samoa standard time
228# The law doesn't give abbreviations.
229#
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230# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow:
231# Public law 106-564 (2000-12-23) introduced the abbreviation
232# "Chamorro Standard Time" for time in Guam and the Northern Marianas.
233# See the file "australasia".
bd7414aa 234
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235# From Arthur David Olson, 2005-08-09
236# The following was signed into law on 2005-08-08.
237#
238# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS.
239# (a) Amendment- Section 3(a) of the Uniform Time Act of 1966 (15
240# U.S.C. 260a(a)) is amended--
241# (1) by striking `first Sunday of April' and inserting `second
242# Sunday of March'; and
243# (2) by striking `last Sunday of October' and inserting `first
244# Sunday of November'.
245# (b) Effective Date- Subsection (a) shall take effect 1 year after the
246# date of enactment of this Act or March 1, 2007, whichever is later.
247# (c) Report to Congress- Not later than 9 months after the effective
248# date stated in subsection (b), the Secretary shall report to Congress
249# on the impact of this section on energy consumption in the United
250# States.
251# (d) Right to Revert- Congress retains the right to revert the
252# Daylight Saving Time back to the 2005 time schedules once the
253# Department study is complete.
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254
255# US eastern time, represented by New York
256
257# Connecticut, Delaware, District of Columbia, most of Florida,
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258# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky
259# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts,
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260# New Hampshire, New Jersey, New York, North Carolina, Ohio,
261# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee,
262# Vermont, Virginia, West Virginia
263
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264# From Dave Cantor (2004-11-02):
265# Early this summer I had the occasion to visit the Mount Washington
266# Observatory weather station atop (of course!) Mount Washington [, NH]....
267# One of the staff members said that the station was on Eastern Standard Time
268# and didn't change their clocks for Daylight Saving ... so that their
269# reports will always have times which are 5 hours behind UTC.
270
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271# From Paul Eggert (2005-08-26):
272# According to today's Huntsville Times
273# <http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1>
274# a few towns on Alabama's "eastern border with Georgia, such as Phenix City
275# in Russell County, Lanett in Chambers County and some towns in Lee County,
276# set their watches and clocks on Eastern time." It quotes H.H. "Bubba"
277# Roberts, city administrator in Phenix City. as saying "We are in the Central
278# time zone, but we do go by the Eastern time zone because so many people work
bd7414aa 279# in Columbus."
e1e23b59 280
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281# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
282Rule NYC 1920 only - Mar lastSun 2:00 1:00 D
283Rule NYC 1920 only - Oct lastSun 2:00 0 S
284Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D
285Rule NYC 1921 1954 - Sep lastSun 2:00 0 S
286Rule NYC 1955 1966 - Oct lastSun 2:00 0 S
287# Zone NAME GMTOFF RULES FORMAT [UNTIL]
bc95ec93 288Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58
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289 -5:00 US E%sT 1920
290 -5:00 NYC E%sT 1942
291 -5:00 US E%sT 1946
292 -5:00 NYC E%sT 1967
293 -5:00 US E%sT
294
295# US central time, represented by Chicago
296
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297# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia,
298# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and
299# Washington counties), Illinois, western Indiana
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300# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
301# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western
302# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern
303# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota,
304# western Tennessee, most of Texas, Wisconsin
305
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306# From Larry M. Smith (2006-04-26) re Wisconsin:
307# http://www.legis.state.wi.us/statutes/Stat0175.pdf ...
308# is currently enforced at the 01:00 time of change. Because the local
309# "bar time" in the state corresponds to 02:00, a number of citations
310# are issued for the "sale of class 'B' alcohol after prohibited
311# hours" within the deviated hour of this change every year....
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312#
313# From Douglas R. Bomberg (2007-03-12):
314# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI
315# Statue 175 closer in synch with the US Congress' intent....
316# http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf
bd7414aa 317
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318# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
319Rule Chicago 1920 only - Jun 13 2:00 1:00 D
320Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S
321Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D
322Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D
323Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S
324Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S
325# Zone NAME GMTOFF RULES FORMAT [UNTIL]
bc95ec93 326Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24
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327 -6:00 US C%sT 1920
328 -6:00 Chicago C%sT 1936 Mar 1 2:00
329 -5:00 - EST 1936 Nov 15 2:00
330 -6:00 Chicago C%sT 1942
331 -6:00 US C%sT 1946
332 -6:00 Chicago C%sT 1967
333 -6:00 US C%sT
334# Oliver County, ND switched from mountain to central time on 1992-10-25.
bc95ec93 335Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48
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336 -7:00 US M%sT 1992 Oct 25 02:00
337 -6:00 US C%sT
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338# Morton County, ND, switched from mountain to central time on
339# 2003-10-26, except for the area around Mandan which was already central time.
340# See <http://dmses.dot.gov/docimages/p63/135818.pdf>.
341# Officially this switch also included part of Sioux County, and
342# Jones, Mellette, and Todd Counties in South Dakota;
343# but in practice these other counties were already observing central time.
344# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>.
345Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21
346 -7:00 US M%sT 2003 Oct 26 02:00
347 -6:00 US C%sT
984263bc 348
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349# From Josh Findley (2011-01-21):
350# ...it appears that Mercer County, North Dakota, changed from the
351# mountain time zone to the central time zone at the last transition from
352# daylight-saving to standard time (on Nov. 7, 2010):
353# <a href="http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm">
354# http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm
355# </a>
356# <a href="http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html">
357# http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html
358# </a>
359
360# From Andy Lipscomb (2011-01-24):
361# ...according to the Census Bureau, the largest city is Beulah (although
362# it's commonly referred to as Beulah-Hazen, with Hazen being the next
363# largest city in Mercer County). Google Maps places Beulah's city hall
364# at 4715'51" north, 10146'40" west, which yields an offset of 6h47'07".
365
366Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53
367 -7:00 US M%sT 2010 Nov 7 2:00
368 -6:00 US C%sT
369
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370# US mountain time, represented by Denver
371#
ba5ba9da 372# Colorado, far western Kansas, Montana, western
984263bc 373# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City),
0e49ec84 374# New Mexico, southwestern North Dakota,
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375# western South Dakota, far western Texas (El Paso County, Hudspeth County,
376# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming
377#
378# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
379Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D
380Rule Denver 1920 only - Oct lastSun 2:00 0 S
381Rule Denver 1921 only - May 22 2:00 0 S
382Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D
383Rule Denver 1965 1966 - Oct lastSun 2:00 0 S
384# Zone NAME GMTOFF RULES FORMAT [UNTIL]
bc95ec93 385Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04
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386 -7:00 US M%sT 1920
387 -7:00 Denver M%sT 1942
388 -7:00 US M%sT 1946
389 -7:00 Denver M%sT 1967
390 -7:00 US M%sT
391
392# US Pacific time, represented by Los Angeles
393#
ba5ba9da 394# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater,
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395# Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties,
396# and the northern three-quarters of Idaho county),
ba5ba9da 397# most of Nevada, most of Oregon, and Washington
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398#
399# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
400Rule CA 1948 only - Mar 14 2:00 1:00 D
401Rule CA 1949 only - Jan 1 2:00 0 S
402Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D
403Rule CA 1950 1961 - Sep lastSun 2:00 0 S
404Rule CA 1962 1966 - Oct lastSun 2:00 0 S
405# Zone NAME GMTOFF RULES FORMAT [UNTIL]
bc95ec93 406Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02
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407 -8:00 US P%sT 1946
408 -8:00 CA P%sT 1967
409 -8:00 US P%sT
410
411# Alaska
412# AK%sT is the modern abbreviation for -9:00 per USNO.
413#
414# From Paul Eggert (2001-05-30):
415# Howse writes that Alaska switched from the Julian to the Gregorian calendar,
416# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
417# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian,
418# also a Friday. Include only the time zone part of this transition,
419# ignoring the switch from Julian to Gregorian, since we can't represent
420# the Julian calendar.
421#
422# As far as we know, none of the exact locations mentioned below were
423# permanently inhabited in 1867 by anyone using either calendar.
424# (Yakutat was colonized by the Russians in 1799, but the settlement
425# was destroyed in 1805 by a Yakutat-kon war party.) However, there
426# were nearby inhabitants in some cases and for our purposes perhaps
427# it's best to simply use the official transition.
428#
429# Zone NAME GMTOFF RULES FORMAT [UNTIL]
430Zone America/Juneau 15:02:19 - LMT 1867 Oct 18
431 -8:57:41 - LMT 1900 Aug 20 12:00
432 -8:00 - PST 1942
433 -8:00 US P%sT 1946
434 -8:00 - PST 1969
435 -8:00 US P%sT 1983 Oct 30 2:00
ba5ba9da 436 -9:00 US Y%sT 1983 Nov 30
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437 -9:00 US AK%sT
438Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18
439 -9:18:55 - LMT 1900 Aug 20 12:00
440 -9:00 - YST 1942
441 -9:00 US Y%sT 1946
442 -9:00 - YST 1969
ba5ba9da 443 -9:00 US Y%sT 1983 Nov 30
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444 -9:00 US AK%sT
445Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18
446 -9:59:36 - LMT 1900 Aug 20 12:00
447 -10:00 - CAT 1942
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448 -10:00 US CAT/CAWT 1945 Aug 14 23:00u
449 -10:00 US CAT/CAPT 1946 # Peace
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450 -10:00 - CAT 1967 Apr
451 -10:00 - AHST 1969
452 -10:00 US AH%sT 1983 Oct 30 2:00
ba5ba9da 453 -9:00 US Y%sT 1983 Nov 30
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454 -9:00 US AK%sT
455Zone America/Nome 12:58:21 - LMT 1867 Oct 18
456 -11:01:38 - LMT 1900 Aug 20 12:00
457 -11:00 - NST 1942
458 -11:00 US N%sT 1946
459 -11:00 - NST 1967 Apr
460 -11:00 - BST 1969
461 -11:00 US B%sT 1983 Oct 30 2:00
ba5ba9da 462 -9:00 US Y%sT 1983 Nov 30
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463 -9:00 US AK%sT
464Zone America/Adak 12:13:21 - LMT 1867 Oct 18
465 -11:46:38 - LMT 1900 Aug 20 12:00
466 -11:00 - NST 1942
467 -11:00 US N%sT 1946
468 -11:00 - NST 1967 Apr
469 -11:00 - BST 1969
470 -11:00 US B%sT 1983 Oct 30 2:00
ba5ba9da 471 -10:00 US AH%sT 1983 Nov 30
984263bc 472 -10:00 US HA%sT
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473# The following switches don't quite make our 1970 cutoff.
474#
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475# Shanks writes that part of southwest Alaska (e.g. Aniak)
476# switched from -11:00 to -10:00 on 1968-09-22 at 02:00,
477# and another part (e.g. Akiak) made the same switch five weeks later.
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478#
479# From David Flater (2004-11-09):
480# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska
481# Historic Preservation Commission, provided this information, which
482# suggests that Unalaska deviated from statutory time from early 1967
483# possibly until 1983:
484#
485# Minutes of the Unalaska City Council Meeting, January 10, 1967:
486# "Except for St. Paul and Akutan, Unalaska is the only important
487# location not on Alaska Standard Time. The following resolution was
488# made by William Robinson and seconded by Henry Swanson: Be it
489# resolved that the City of Unalaska hereby goes to Alaska Standard
490# Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday,
491# January 14, Alaska Standard Time.) This resolution was passed with
492# three votes for and one against."
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493
494# Hawaii
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495
496# From Arthur David Olson (2010-12-09):
497# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225
498# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09,
499# the article is available at
500# <a href="http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf">
501# http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf
502# </a>
503# and indicates that standard time was adopted effective noon, January
504# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight
505# saving for the period between the last Sunday of each April and the
506# last Sunday of each September, but less than a month later repealed the
507# act," (page 220), that year-round daylight saving time was in effect
508# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for
509# when clocks changed) and that clocks were changed by 30 minutes
510# effective the second Sunday of June, 1947 (page 219, with no time of
511# day given for when clocks changed). A footnote for the 1933 changes
512# cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933)
513# and Act 163 (approved 21 May 1933)."
514
515# From Arthur David Olson (2011-01-19):
516# The following is from "Laws of the Territory of Hawaii Passed by the
517# Seventeenth Legislature: Regular Session 1933," available (as of
518# 2011-01-19) at American University's Pence Law Library. Page 85: "Act
519# 90...At 2 o'clock ante meridian of the last Sunday in April of each
520# year, the standard time of this Territory shall be advanced one
521# hour...This Act shall take effect upon its approval. Approved this 26th
522# day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of
523# Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is
524# hereby repealed...This Act shall take effect upon its approval, upon
525# which date the standard time of this Territory shall be restored to
526# that existing immediately prior to the taking effect of said Act 90.
527# Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor
528# of the Territory of Hawaii."
984263bc 529#
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530# Note that 1933-05-21 was a Sunday.
531# We're left to guess the time of day when Act 163 was approved; guess noon.
532
533Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 #Schmitt&Cox
534 -10:30 - HST 1933 Apr 30 2:00 #Laws 1933
535 -10:30 1:00 HDT 1933 May 21 12:00 #Laws 1933+12
536 -10:30 - HST 1942 Feb 09 2:00 #Schmitt&Cox+2
537 -10:30 1:00 HDT 1945 Sep 30 2:00 #Schmitt&Fox+2
538 -10:30 US H%sT 1947 Jun 8 2:00 #Schmitt&Fox+2
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539 -10:00 - HST
540
541# Now we turn to US areas that have diverged from the consensus since 1970.
542
543# Arizona mostly uses MST.
544
545# From Paul Eggert (2002-10-20):
546#
547# The information in the rest of this paragraph is derived from the
548# <a href="http://www.dlapr.lib.az.us/links/daylight.htm">
549# Daylight Saving Time web page (2002-01-23)</a> maintained by the
550# Arizona State Library, Archives and Public Records.
551# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard
552# time, but by federal law railroads, airlines, bus lines, military
553# personnel, and some engaged in interstate commerce continued to
554# observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix
555# Gazette says that was the date the law changed, and that 04-01 was
556# the date the state's clocks would change. In 1945 the State of
557# Arizona used standard time all year, again with exceptions only as
558# mandated by federal law. Arizona observed DST in 1967, but Arizona
559# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST.
560#
561# Shanks says the 1944 experiment came to an end on 1944-03-17.
562# Go with the Arizona State Library instead.
563
bc95ec93 564Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42
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565 -7:00 US M%sT 1944 Jan 1 00:01
566 -7:00 - MST 1944 Apr 1 00:01
567 -7:00 US M%sT 1944 Oct 1 00:01
568 -7:00 - MST 1967
569 -7:00 US M%sT 1968 Mar 21
570 -7:00 - MST
571# From Arthur David Olson (1988-02-13):
572# A writer from the Inter Tribal Council of Arizona, Inc.,
ba5ba9da 573# notes in private correspondence dated 1987-12-28 that "Presently, only the
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574# Navajo Nation participates in the Daylight Saving Time policy, due to its
575# large size and location in three states." (The "only" means that other
576# tribal nations don't use DST.)
577
578Link America/Denver America/Shiprock
579
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580# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine,
581# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark,
582# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome,
583# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power,
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584# Teton, Twin Falls, Valley, Washington counties, and the southern
585# quarter of Idaho county) and eastern Oregon (most of Malheur County)
ba5ba9da 586# switched four weeks late in 1974.
bc95ec93 587#
984263bc 588# Zone NAME GMTOFF RULES FORMAT [UNTIL]
bc95ec93 589Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11
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590 -8:00 US P%sT 1923 May 13 2:00
591 -7:00 US M%sT 1974
592 -7:00 - MST 1974 Feb 3 2:00
593 -7:00 US M%sT
594
595# Indiana
596#
597# For a map of Indiana's time zone regions, see:
598# <a href="http://www.mccsc.edu/time.html">
599# What time is it in Indiana?
bd7414aa 600# </a> (2006-03-01)
9ffe4b14 601#
0e49ec84 602# From Paul Eggert (2007-08-17):
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603# Since 1970, most of Indiana has been like America/Indiana/Indianapolis,
604# with the following exceptions:
605#
606# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
607# Vandenburgh, and Warrick counties have been like America/Chicago.
608#
609# - Dearborn and Ohio counties have been like America/New_York.
610#
611# - Clark, Floyd, and Harrison counties have been like
612# America/Kentucky/Louisville.
613#
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614# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke,
615# and Switzerland counties have their own time zone histories as noted below.
984263bc 616#
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617# Shanks partitioned Indiana into 345 regions, each with its own time history,
618# and wrote ``Even newspaper reports present contradictory information.''
619# Those Hoosiers! Such a flighty and changeable people!
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620# Fortunately, most of the complexity occurred before our cutoff date of 1970.
621#
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622# Other than Indianapolis, the Indiana place names are so nondescript
623# that they would be ambiguous if we left them at the `America' level.
624# So we reluctantly put them all in a subdirectory `America/Indiana'.
984263bc 625
9ffe4b14 626# From Paul Eggert (2005-08-16):
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627# http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006.
628
629# From Nathan Stratton Treadway (2006-03-30):
630# http://www.dot.gov/affairs/dot0406.htm [3705 B]
631# From Deborah Goldsmith (2006-01-18):
632# http://dmses.dot.gov/docimages/pdf95/382329_web.pdf [2.9 MB]
633# From Paul Eggert (2006-01-20):
634# It says "DOT is relocating the time zone boundary in Indiana to move Starke,
635# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the
636# Eastern Time Zone to the Central Time Zone.... The effective date of
637# this rule is 2:OO a.m. EST Sunday, April 2, 2006, which is the
638# changeover date from standard time to Daylight Saving Time."
639# Strictly speaking, this means the affected counties will change their
640# clocks twice that night, but this obviously is in error. The intent
641# is that 01:59:59 EST be followed by 02:00:00 CDT.
984263bc 642
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643# From Gwillim Law (2007-02-10):
644# The Associated Press has been reporting that Pulaski County, Indiana is
645# going to switch from Central to Eastern Time on March 11, 2007....
646# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL
647
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648# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
649Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D
650Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S
651Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D
652# Zone NAME GMTOFF RULES FORMAT [UNTIL]
9ffe4b14 653Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22
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654 -6:00 US C%sT 1920
655 -6:00 Indianapolis C%sT 1942
656 -6:00 US C%sT 1946
657 -6:00 Indianapolis C%sT 1955 Apr 24 2:00
658 -5:00 - EST 1957 Sep 29 2:00
659 -6:00 - CST 1958 Apr 27 2:00
660 -5:00 - EST 1969
661 -5:00 US E%sT 1971
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662 -5:00 - EST 2006
663 -5:00 US E%sT
984263bc 664#
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665# Eastern Crawford County, Indiana, left its clocks alone in 1974,
666# as well as from 1976 through 2005.
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667# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
668Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D
669Rule Marengo 1951 only - Sep lastSun 2:00 0 S
670Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D
671Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S
672# Zone NAME GMTOFF RULES FORMAT [UNTIL]
bc95ec93 673Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37
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674 -6:00 US C%sT 1951
675 -6:00 Marengo C%sT 1961 Apr 30 2:00
676 -5:00 - EST 1969
677 -5:00 US E%sT 1974 Jan 6 2:00
678 -6:00 1:00 CDT 1974 Oct 27 2:00
679 -5:00 US E%sT 1976
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680 -5:00 - EST 2006
681 -5:00 US E%sT
984263bc 682#
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683# Daviess, Dubois, Knox, and Martin Counties, Indiana,
684# switched from eastern to central time in April 2006, then switched back
685# in November 2007.
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686# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
687Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D
688Rule Vincennes 1946 only - Sep lastSun 2:00 0 S
689Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D
690Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S
691Rule Vincennes 1955 only - May 1 0:00 1:00 D
692Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D
693Rule Vincennes 1960 only - Oct lastSun 2:00 0 S
694Rule Vincennes 1961 only - Sep lastSun 2:00 0 S
695Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S
696# Zone NAME GMTOFF RULES FORMAT [UNTIL]
697Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53
698 -6:00 US C%sT 1946
699 -6:00 Vincennes C%sT 1964 Apr 26 2:00
700 -5:00 - EST 1969
701 -5:00 US E%sT 1971
702 -5:00 - EST 2006 Apr 2 2:00
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703 -6:00 US C%sT 2007 Nov 4 2:00
704 -5:00 US E%sT
705#
706# Perry County, Indiana, switched from eastern to central time in April 2006.
707# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
708Rule Perry 1946 only - Apr lastSun 2:00 1:00 D
709Rule Perry 1946 only - Sep lastSun 2:00 0 S
710Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D
711Rule Perry 1953 1959 - Sep lastSun 2:00 0 S
712Rule Perry 1955 only - May 1 0:00 1:00 D
713Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D
714Rule Perry 1960 only - Oct lastSun 2:00 0 S
715Rule Perry 1961 only - Sep lastSun 2:00 0 S
716Rule Perry 1962 1963 - Oct lastSun 2:00 0 S
717# Zone NAME GMTOFF RULES FORMAT [UNTIL]
718Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57
719 -6:00 US C%sT 1946
720 -6:00 Perry C%sT 1964 Apr 26 2:00
721 -5:00 - EST 1969
722 -5:00 US E%sT 1971
723 -5:00 - EST 2006 Apr 2 2:00
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724 -6:00 US C%sT
725#
726# Pike County, Indiana moved from central to eastern time in 1977,
0e49ec84 727# then switched back in 2006, then switched back again in 2007.
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728# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
729Rule Pike 1955 only - May 1 0:00 1:00 D
730Rule Pike 1955 1960 - Sep lastSun 2:00 0 S
731Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D
732Rule Pike 1961 1964 - Oct lastSun 2:00 0 S
733# Zone NAME GMTOFF RULES FORMAT [UNTIL]
734Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53
735 -6:00 US C%sT 1955
736 -6:00 Pike C%sT 1965 Apr 25 2:00
737 -5:00 - EST 1966 Oct 30 2:00
738 -6:00 US C%sT 1977 Oct 30 2:00
739 -5:00 - EST 2006 Apr 2 2:00
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740 -6:00 US C%sT 2007 Nov 4 2:00
741 -5:00 US E%sT
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742#
743# Starke County, Indiana moved from central to eastern time in 1991,
744# then switched back in 2006.
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745# From Arthur David Olson (1991-10-28):
746# An article on page A3 of the Sunday, 1991-10-27 Washington Post
747# notes that Starke County switched from Central time to Eastern time as of
748# 1991-10-27.
749# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
750Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D
751Rule Starke 1947 1954 - Sep lastSun 2:00 0 S
752Rule Starke 1955 1956 - Oct lastSun 2:00 0 S
753Rule Starke 1957 1958 - Sep lastSun 2:00 0 S
754Rule Starke 1959 1961 - Oct lastSun 2:00 0 S
755# Zone NAME GMTOFF RULES FORMAT [UNTIL]
bc95ec93 756Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30
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757 -6:00 US C%sT 1947
758 -6:00 Starke C%sT 1962 Apr 29 2:00
759 -5:00 - EST 1963 Oct 27 2:00
760 -6:00 US C%sT 1991 Oct 27 2:00
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761 -5:00 - EST 2006 Apr 2 2:00
762 -6:00 US C%sT
984263bc 763#
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764# Pulaski County, Indiana, switched from eastern to central time in
765# April 2006 and then switched back in March 2007.
766# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
767Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D
768Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S
769Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S
770Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S
771# Zone NAME GMTOFF RULES FORMAT [UNTIL]
772Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35
773 -6:00 US C%sT 1946
774 -6:00 Pulaski C%sT 1961 Apr 30 2:00
775 -5:00 - EST 1969
776 -5:00 US E%sT 1971
777 -5:00 - EST 2006 Apr 2 2:00
778 -6:00 US C%sT 2007 Mar 11 2:00
779 -5:00 US E%sT
780#
bd7414aa 781# Switzerland County, Indiana, did not observe DST from 1973 through 2005.
984263bc 782# Zone NAME GMTOFF RULES FORMAT [UNTIL]
bc95ec93 783Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44
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784 -6:00 US C%sT 1954 Apr 25 2:00
785 -5:00 - EST 1969
786 -5:00 US E%sT 1973
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787 -5:00 - EST 2006
788 -5:00 US E%sT
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789
790# Part of Kentucky left its clocks alone in 1974.
9ffe4b14 791# This also includes Clark, Floyd, and Harrison counties in Indiana.
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792# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
793Rule Louisville 1921 only - May 1 2:00 1:00 D
794Rule Louisville 1921 only - Sep 1 2:00 0 S
795Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D
796Rule Louisville 1941 only - Sep lastSun 2:00 0 S
797Rule Louisville 1946 only - Jun 2 2:00 0 S
798Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S
799Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S
800# Zone NAME GMTOFF RULES FORMAT [UNTIL]
9ffe4b14 801Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58
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802 -6:00 US C%sT 1921
803 -6:00 Louisville C%sT 1942
804 -6:00 US C%sT 1946
805 -6:00 Louisville C%sT 1961 Jul 23 2:00
806 -5:00 - EST 1968
807 -5:00 US E%sT 1974 Jan 6 2:00
808 -6:00 1:00 CDT 1974 Oct 27 2:00
809 -5:00 US E%sT
984263bc 810#
bd7414aa 811# Wayne County, Kentucky
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812#
813# From
814# <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml">
815# Lake Cumberland LIFE
816# </a> (1999-01-29) via WKYM-101.7:
817# Clinton County has joined Wayne County in asking the DoT to change from
818# the Central to the Eastern time zone.... The Wayne County government made
819# the same request in December. And while Russell County officials have not
820# taken action, the majority of respondents to a poll conducted there in
821# August indicated they would like to change to "fast time" also.
822# The three Lake Cumberland counties are the farthest east of any U.S.
823# location in the Central time zone.
824#
825# From Rich Wales (2000-08-29):
826# After prolonged debate, and despite continuing deep differences of opinion,
827# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern
828# (-0500) time. They won't "fall back" this year. See Sara Shipley,
829# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400).
830#
831# From Paul Eggert (2001-07-16):
832# The final rule was published in the
833# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22">
834# Federal Register 65, 160 (2000-08-17), page 50154-50158.
835# </a>
836#
bc95ec93 837Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36
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838 -6:00 US C%sT 1946
839 -6:00 - CST 1968
840 -6:00 US C%sT 2000 Oct 29 2:00
841 -5:00 US E%sT
842
843
844# From Rives McDow (2000-08-30):
845# Here ... are all the changes in the US since 1985.
846# Kearny County, KS (put all of county on central;
847# previously split between MST and CST) ... 1990-10
848# Starke County, IN (from CST to EST) ... 1991-10
849# Oliver County, ND (from MST to CST) ... 1992-10
850# West Wendover, NV (from PST TO MST) ... 1999-10
851# Wayne County, KY (from CST to EST) ... 2000-10
852#
853# From Paul Eggert (2001-07-17):
854# We don't know where the line used to be within Kearny County, KS,
855# so omit that change for now.
856# See America/Indiana/Knox for the Starke County, IN change.
857# See America/North_Dakota/Center for the Oliver County, ND change.
858# West Wendover, NV officially switched from Pacific to mountain time on
859# 1999-10-31. See the
860# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15">
861# Federal Register 64, 203 (1999-10-21), page 56705-56707.
862# </a>
863# However, the Federal Register says that West Wendover already operated
864# on mountain time, and the rule merely made this official;
865# hence a separate tz entry is not needed.
866
867# Michigan
868#
869# From Bob Devine (1988-01-28):
870# Michigan didn't observe DST from 1968 to 1973.
871#
872# From Paul Eggert (1999-03-31):
873# Shanks writes that Michigan started using standard time on 1885-09-18,
874# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01)
875# that Detroit kept
876#
877# local time until 1900 when the City Council decreed that clocks should
878# be put back twenty-eight minutes to Central Standard Time. Half the
879# city obeyed, half refused. After considerable debate, the decision
880# was rescinded and the city reverted to Sun time. A derisive offer to
881# erect a sundial in front of the city hall was referred to the
882# Committee on Sewers. Then, in 1905, Central time was adopted
883# by city vote.
884#
885# This story is too entertaining to be false, so go with Howse over Shanks.
886#
887# From Paul Eggert (2001-03-06):
888# Garland (1927) writes ``Cleveland and Detroit advanced their clocks
889# one hour in 1914.'' This change is not in Shanks. We have no more
890# info, so omit this for now.
891#
892# Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
893# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
894Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D
895Rule Detroit 1948 only - Sep lastSun 2:00 0 S
896Rule Detroit 1967 only - Jun 14 2:00 1:00 D
897Rule Detroit 1967 only - Oct lastSun 2:00 0 S
898# Zone NAME GMTOFF RULES FORMAT [UNTIL]
899Zone America/Detroit -5:32:11 - LMT 1905
900 -6:00 - CST 1915 May 15 2:00
901 -5:00 - EST 1942
902 -5:00 US E%sT 1946
903 -5:00 Detroit E%sT 1973
904 -5:00 US E%sT 1975
905 -5:00 - EST 1975 Apr 27 2:00
906 -5:00 US E%sT
907#
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908# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan,
909# switched from EST to CST/CDT in 1973.
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910# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
911Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D
912Rule Menominee 1946 only - Sep lastSun 2:00 0 S
913Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D
914Rule Menominee 1966 only - Oct lastSun 2:00 0 S
915# Zone NAME GMTOFF RULES FORMAT [UNTIL]
916Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00
917 -6:00 US C%sT 1946
918 -6:00 Menominee C%sT 1969 Apr 27 2:00
919 -5:00 - EST 1973 Apr 29 2:00
920 -6:00 US C%sT
921
922# Navassa
923# administered by the US Fish and Wildlife Service
924# claimed by US under the provisions of the 1856 Guano Islands Act
925# also claimed by Haiti
926# occupied 1857/1900 by the Navassa Phosphate Co
927# US lighthouse 1917/1996-09
928# currently uninhabited
929# see Mark Fineman, ``An Isle Rich in Guano and Discord'',
930# _Los Angeles Times_ (1998-11-10), A1, A10; it cites
931# Jimmy Skaggs, _The Great Guano Rush_ (1994).
932
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933################################################################################
934
935
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936# From Paul Eggert (2006-03-22):
937# A good source for time zone historical data outside the U.S. is
938# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
939# San Diego: ACS Publications, Inc. (2003).
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940#
941# Gwillim Law writes that a good source
942# for recent time zone data is the International Air Transport
943# Association's Standard Schedules Information Manual (IATA SSIM),
944# published semiannually. Law sent in several helpful summaries
945# of the IATA's data after 1990.
946#
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947# Except where otherwise noted, Shanks & Pottenger is the source for
948# entries through 1990, and IATA SSIM is the source for entries afterwards.
984263bc 949#
ba5ba9da
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950# Other sources occasionally used include:
951#
952# Edward W. Whitman, World Time Differences,
953# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated),
954# which I found in the UCLA library.
955#
956# <a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf">
957# William Willett, The Waste of Daylight, 19th edition
958# </a> (1914-03)
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959#
960# See the `europe' file for Greenland.
961
962# Canada
963
9ffe4b14 964# From Alain LaBont<e'> (1994-11-14):
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965# I post here the time zone abbreviations standardized in Canada
966# for both English and French in the CAN/CSA-Z234.4-89 standard....
967#
968# UTC Standard time Daylight savings time
969# offset French English French English
970# -2:30 - - HAT NDT
971# -3 - - HAA ADT
972# -3:30 HNT NST - -
973# -4 HNA AST HAE EDT
974# -5 HNE EST HAC CDT
975# -6 HNC CST HAR MDT
976# -7 HNR MST HAP PDT
977# -8 HNP PST HAY YDT
978# -9 HNY YST - -
979#
980# HN: Heure Normale ST: Standard Time
981# HA: Heure Avanc<e'>e DT: Daylight saving Time
982#
983# A: de l'Atlantique Atlantic
984# C: du Centre Central
985# E: de l'Est Eastern
986# M: Mountain
987# N: Newfoundland
988# P: du Pacifique Pacific
989# R: des Rocheuses
990# T: de Terre-Neuve
991# Y: du Yukon Yukon
992#
bc95ec93 993# From Paul Eggert (1994-11-22):
984263bc
MD
994# Alas, this sort of thing must be handled by localization software.
995
bd7414aa
SW
996# Unless otherwise specified, the data for Canada are all from Shanks
997# & Pottenger.
998
8393cd87
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999# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31,
1000# 2007-03-01):
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SW
1001# The British Columbia government announced yesterday that it will
1002# adjust daylight savings next year to align with changes in the
1003# U.S. and the rest of Canada....
1004# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm
70fc4940
SW
1005# ...
1006# Nova Scotia
bd7414aa 1007# Daylight saving time will be extended by four weeks starting in 2007....
70fc4940
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1008# http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf
1009#
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SW
1010# [For New Brunswick] the new legislation dictates that the time change is to
1011# be done at 02:00 instead of 00:01.
1012# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf
1013# ...
1014# Manitoba has traditionally changed the clock every fall at 03:00.
1015# As of 2006, the transition is to take place one hour earlier at 02:00.
1016# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php
1017# ...
1018# [Alberta, Ontario, Quebec] will follow US rules.
70fc4940 1019# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM
bd7414aa 1020# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm
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1021# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF
1022# ...
1023# P.E.I. will follow US rules....
1024# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf
bd7414aa 1025# ...
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1026# Province of Newfoundland and Labrador....
1027# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm
bd7414aa 1028# ...
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SW
1029# Yukon
1030# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf
bd7414aa
SW
1031# ...
1032# N.W.T. will follow US rules. Whoever maintains the government web site
1033# does not seem to believe in bookmarks. To see the news release, click the
1034# following link and search for "Daylight Savings Time Change". Press the
1035# "Daylight Savings Time Change" link; it will fire off a popup using
1036# JavaScript.
1037# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive
70fc4940 1038# ...
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SW
1039# Nunavut
1040# An amendment to the Interpretation Act was registered on February 19/2007....
1041# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf
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SW
1042
1043# From Paul Eggert (2006-04-25):
984263bc 1044# H. David Matthews and Mary Vincent's map
34850bd5 1045# <a href="http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp">
984263bc
MD
1046# "It's about TIME", _Canadian Geographic_ (September-October 1998)
1047# </a> contains detailed boundaries for regions observing nonstandard
1048# time and daylight saving time arrangements in Canada circa 1998.
1049#
34850bd5
SW
1050# INMS, the Institute for National Measurement Standards in Ottawa, has <a
1051# href="http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php">
984263bc
MD
1052# information about standard and daylight saving time zones in Canada.
1053# </a> (updated periodically).
1054# Its unofficial information is often taken from Matthews and Vincent.
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SW
1055
1056# From Paul Eggert (2006-06-27):
1057# For now, assume all of DST-observing Canada will fall into line with the
1058# new US DST rules,
984263bc
MD
1059
1060# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1061Rule Canada 1918 only - Apr 14 2:00 1:00 D
1062Rule Canada 1918 only - Oct 31 2:00 0 S
ba5ba9da
JR
1063Rule Canada 1942 only - Feb 9 2:00 1:00 W # War
1064Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace
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MD
1065Rule Canada 1945 only - Sep 30 2:00 0 S
1066Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D
34850bd5
SW
1067Rule Canada 1974 2006 - Oct lastSun 2:00 0 S
1068Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D
1069Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D
1070Rule Canada 2007 max - Nov Sun>=1 2:00 0 S
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MD
1071
1072
bd7414aa 1073# Newfoundland and Labrador
984263bc
MD
1074
1075# From Paul Eggert (2000-10-02):
1076# Matthews and Vincent (1998) write that Labrador should use NST/NDT,
1077# but the only part of Labrador that follows the rules is the
1078# southeast corner, including Port Hope Simpson and Mary's Harbour,
1079# but excluding, say, Black Tickle.
1080
1081# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
ba5ba9da 1082Rule StJohns 1917 only - Apr 8 2:00 1:00 D
984263bc 1083Rule StJohns 1917 only - Sep 17 2:00 0 S
bd7414aa 1084# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger.
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MD
1085Rule StJohns 1919 only - May 5 23:00 1:00 D
1086Rule StJohns 1919 only - Aug 12 23:00 0 S
bd7414aa 1087# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger.
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MD
1088Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D
1089Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S
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SW
1090# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks &
1091# Pottenger.
ba5ba9da
JR
1092Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D
1093Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S
1094# Whitman gives the following transitions:
1095# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07
bd7414aa 1096# but go with Shanks & Pottenger and assume they used Canadian rules.
984263bc 1097# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives
bd7414aa 1098# Apr 30 - Sep 24; go with Shanks & Pottenger.
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MD
1099Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D
1100Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S
1101Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D
1102Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S
1103Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S
1104# From Paul Eggert (2000-10-02):
1105# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches
1106# at 00:01 local time. For now, assume it started in 1987.
1107Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D
bd7414aa 1108Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S
984263bc 1109Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD
bd7414aa
SW
1110Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D
1111Rule StJohns 2007 max - Mar Sun>=8 0:01 1:00 D
1112Rule StJohns 2007 max - Nov Sun>=1 0:01 0 S
1113#
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MD
1114# St John's has an apostrophe, but Posix file names can't have apostrophes.
1115# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1116Zone America/St_Johns -3:30:52 - LMT 1884
ba5ba9da
JR
1117 -3:30:52 StJohns N%sT 1918
1118 -3:30:52 Canada N%sT 1919
984263bc 1119 -3:30:52 StJohns N%sT 1935 Mar 30
ba5ba9da
JR
1120 -3:30 StJohns N%sT 1942 May 11
1121 -3:30 Canada N%sT 1946
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MD
1122 -3:30 StJohns N%sT
1123
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MD
1124# most of east Labrador
1125
1126# The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'.
1127# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1128Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay
ba5ba9da
JR
1129 -3:30:52 - NST 1918
1130 -3:30:52 Canada N%sT 1919
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MD
1131 -3:30:52 - NST 1935 Mar 30
1132 -3:30 - NST 1936
ba5ba9da
JR
1133 -3:30 StJohns N%sT 1942 May 11
1134 -3:30 Canada N%sT 1946
984263bc
MD
1135 -3:30 StJohns N%sT 1966 Mar 15 2:00
1136 -4:00 StJohns A%sT
1137
1138
bd7414aa 1139# west Labrador, Nova Scotia, Prince Edward I
984263bc 1140
bd7414aa
SW
1141# From Paul Eggert (2006-03-22):
1142# Shanks & Pottenger write that since 1970 most of this region has been like
1143# Halifax. Many locales did not observe peacetime DST until 1972;
984263bc 1144# Glace Bay, NS is the largest that we know of.
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SW
1145# Shanks & Pottenger also write that Liverpool, NS was the only town
1146# in Canada to observe DST in 1971 but not 1970; for now we'll assume
1147# this is a typo.
984263bc
MD
1148
1149# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
bd7414aa
SW
1150Rule Halifax 1916 only - Apr 1 0:00 1:00 D
1151Rule Halifax 1916 only - Oct 1 0:00 0 S
1152Rule Halifax 1920 only - May 9 0:00 1:00 D
1153Rule Halifax 1920 only - Aug 29 0:00 0 S
1154Rule Halifax 1921 only - May 6 0:00 1:00 D
1155Rule Halifax 1921 1922 - Sep 5 0:00 0 S
1156Rule Halifax 1922 only - Apr 30 0:00 1:00 D
1157Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D
1158Rule Halifax 1923 only - Sep 4 0:00 0 S
1159Rule Halifax 1924 only - Sep 15 0:00 0 S
1160Rule Halifax 1925 only - Sep 28 0:00 0 S
1161Rule Halifax 1926 only - May 16 0:00 1:00 D
1162Rule Halifax 1926 only - Sep 13 0:00 0 S
1163Rule Halifax 1927 only - May 1 0:00 1:00 D
1164Rule Halifax 1927 only - Sep 26 0:00 0 S
1165Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D
1166Rule Halifax 1928 only - Sep 9 0:00 0 S
1167Rule Halifax 1929 only - Sep 3 0:00 0 S
1168Rule Halifax 1930 only - Sep 15 0:00 0 S
1169Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S
1170Rule Halifax 1932 only - May 1 0:00 1:00 D
1171Rule Halifax 1933 only - Apr 30 0:00 1:00 D
1172Rule Halifax 1933 only - Oct 2 0:00 0 S
1173Rule Halifax 1934 only - May 20 0:00 1:00 D
1174Rule Halifax 1934 only - Sep 16 0:00 0 S
1175Rule Halifax 1935 only - Jun 2 0:00 1:00 D
1176Rule Halifax 1935 only - Sep 30 0:00 0 S
1177Rule Halifax 1936 only - Jun 1 0:00 1:00 D
1178Rule Halifax 1936 only - Sep 14 0:00 0 S
1179Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D
1180Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S
1181Rule Halifax 1939 only - May 28 0:00 1:00 D
1182Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D
1183Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D
1184Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S
1185Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D
1186Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S
1187Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D
1188Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S
1189Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D
1190Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S
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MD
1191# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1192Zone America/Halifax -4:14:24 - LMT 1902 Jun 15
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JR
1193 -4:00 Halifax A%sT 1918
1194 -4:00 Canada A%sT 1919
1195 -4:00 Halifax A%sT 1942 Feb 9 2:00s
1196 -4:00 Canada A%sT 1946
1197 -4:00 Halifax A%sT 1974
1198 -4:00 Canada A%sT
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MD
1199Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15
1200 -4:00 Canada A%sT 1953
1201 -4:00 Halifax A%sT 1954
1202 -4:00 - AST 1972
ba5ba9da
JR
1203 -4:00 Halifax A%sT 1974
1204 -4:00 Canada A%sT
984263bc 1205
bd7414aa 1206# New Brunswick
984263bc 1207
70fc4940
SW
1208# From Paul Eggert (2007-01-31):
1209# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf>
1210# says they changed at 00:01 through 2006, and
bd7414aa 1211# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it
70fc4940 1212# clear that this was the case since at least 1993.
bd7414aa 1213# For now, assume it started in 1993.
984263bc 1214
bd7414aa
SW
1215# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1216Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D
1217Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S
1218Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D
1219Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S
1220Rule Moncton 1939 only - May 27 1:00 1:00 D
1221Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S
1222Rule Moncton 1940 only - May 19 1:00 1:00 D
1223Rule Moncton 1941 only - May 4 1:00 1:00 D
1224Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D
1225Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S
1226Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S
1227Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D
1228Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S
1229# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1230Zone America/Moncton -4:19:08 - LMT 1883 Dec 9
1231 -5:00 - EST 1902 Jun 15
1232 -4:00 Canada A%sT 1933
1233 -4:00 Moncton A%sT 1942
1234 -4:00 Canada A%sT 1946
1235 -4:00 Moncton A%sT 1973
1236 -4:00 Canada A%sT 1993
1237 -4:00 Moncton A%sT 2007
1238 -4:00 Canada A%sT
1239
1240# Quebec
1241
1242# From Paul Eggert (2006-07-09):
1243# Shanks & Pottenger write that since 1970 most of Quebec has been
1244# like Montreal.
1245
1246# From Paul Eggert (2006-06-27):
1247# Matthews and Vincent (1998) also write that Quebec east of the -63
1248# meridian is supposed to observe AST, but residents as far east as
1249# Natashquan use EST/EDT, and residents east of Natashquan use AST.
1250# In "Official time in Quebec" the Quebec department of justice writes in
1251# http://www.justice.gouv.qc.ca/english/publications/generale/temps-regl-1-a.htm
1252# that "The residents of the Municipality of the
1253# Cote-Nord-du-Golfe-Saint-Laurent and the municipalities of Saint-Augustin,
1254# Bonne-Esperance and Blanc-Sablon apply the Official Time Act as it is
1255# written and use Atlantic standard time all year round. The same applies to
1256# the residents of the Native facilities along the lower North Shore."
1257# <http://www.assnat.qc.ca/eng/37legislature2/Projets-loi/Publics/06-a002.htm>
1258# says this common practice was codified into law as of 2007.
1259# For lack of better info, guess this practice began around 1970, contra to
1260# Shanks & Pottenger who have this region observing AST/ADT.
1261
1262# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1263Rule Mont 1917 only - Mar 25 2:00 1:00 D
1264Rule Mont 1917 only - Apr 24 0:00 0 S
1265Rule Mont 1919 only - Mar 31 2:30 1:00 D
1266Rule Mont 1919 only - Oct 25 2:30 0 S
1267Rule Mont 1920 only - May 2 2:30 1:00 D
1268Rule Mont 1920 1922 - Oct Sun>=1 2:30 0 S
1269Rule Mont 1921 only - May 1 2:00 1:00 D
1270Rule Mont 1922 only - Apr 30 2:00 1:00 D
1271Rule Mont 1924 only - May 17 2:00 1:00 D
1272Rule Mont 1924 1926 - Sep lastSun 2:30 0 S
1273Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D
1274# The 1927-to-1937 rules can be expressed more simply as
1275# Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D
1276# Rule Mont 1927 1937 - Sep lastSat 24:00 0 S
1277# The rules below avoid use of 24:00
1278# (which pre-1998 versions of zic cannot handle).
1279Rule Mont 1927 only - May 1 0:00 1:00 D
1280Rule Mont 1927 1932 - Sep lastSun 0:00 0 S
1281Rule Mont 1928 1931 - Apr lastSun 0:00 1:00 D
1282Rule Mont 1932 only - May 1 0:00 1:00 D
1283Rule Mont 1933 1940 - Apr lastSun 0:00 1:00 D
1284Rule Mont 1933 only - Oct 1 0:00 0 S
1285Rule Mont 1934 1939 - Sep lastSun 0:00 0 S
1286Rule Mont 1946 1973 - Apr lastSun 2:00 1:00 D
1287Rule Mont 1945 1948 - Sep lastSun 2:00 0 S
1288Rule Mont 1949 1950 - Oct lastSun 2:00 0 S
1289Rule Mont 1951 1956 - Sep lastSun 2:00 0 S
1290Rule Mont 1957 1973 - Oct lastSun 2:00 0 S
1291
1292# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1293Zone America/Blanc-Sablon -3:48:28 - LMT 1884
1294 -4:00 Canada A%sT 1970
1295 -4:00 - AST
1296Zone America/Montreal -4:54:16 - LMT 1884
1297 -5:00 Mont E%sT 1918
1298 -5:00 Canada E%sT 1919
1299 -5:00 Mont E%sT 1942 Feb 9 2:00s
1300 -5:00 Canada E%sT 1946
1301 -5:00 Mont E%sT 1974
1302 -5:00 Canada E%sT
1303
1304
1305# Ontario
1306
1307# From Paul Eggert (2006-07-09):
1308# Shanks & Pottenger write that since 1970 most of Ontario has been like
1309# Toronto.
984263bc
MD
1310# Thunder Bay skipped DST in 1973.
1311# Many smaller locales did not observe peacetime DST until 1974;
1312# Nipigon (EST) and Rainy River (CST) are the largest that we know of.
1313# Far west Ontario is like Winnipeg; far east Quebec is like Halifax.
1314
ba5ba9da
JR
1315# From Mark Brader (2003-07-26):
1316# [According to the Toronto Star] Orillia, Ontario, adopted DST
1317# effective Saturday, 1912-06-22, 22:00; the article mentions that
1318# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw
1319# have already done so. In Orillia DST was to run until Saturday,
1320# 1912-08-31 (no time mentioned), but it was met with considerable
1321# hostility from certain segments of the public, and was revoked after
1322# only two weeks -- I copied it as Saturday, 1912-07-07, 22:00, but
1323# presumably that should be -07-06. (1912-06-19, -07-12; also letters
1324# earlier in June).
1325#
1326# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21).
1327
984263bc 1328# From Paul Eggert (1997-10-17):
ba5ba9da 1329# Mark Brader writes that an article in the 1997-10-14 Toronto Star
984263bc
MD
1330# says that Atikokan, Ontario currently does not observe DST,
1331# but will vote on 11-10 whether to use EST/EDT.
1332# He also writes that the
1333# <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html">
1334# Ontario Time Act (1990, Chapter T.9)
1335# </a>
1336# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT.
1337# Officially Atikokan is therefore on CST/CDT, and most likely this report
1338# concerns a non-official time observed as a matter of local practice.
bd7414aa 1339#
984263bc
MD
1340# From Paul Eggert (2000-10-02):
1341# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and
1342# New Osnaburgh observe CST all year, that Big Trout Lake observes
1343# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in
1344# violation of the official Ontario rules.
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SW
1345#
1346# From Paul Eggert (2006-07-09):
1347# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the
1348# 2005-07-21 Chronicle-Journal, which said:
1349#
1350# The clocks in Atikokan stay set on standard time year-round.
1351# This means they spend about half the time on central time and
1352# the other half on eastern time.
1353#
1354# For the most part, the system works, Mayor Dennis Brown said.
1355#
1356# "The majority of businesses in Atikokan deal more with Eastern
1357# Canada, but there are some that deal with Western Canada," he
1358# said. "I don't see any changes happening here."
1359#
1360# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang
1361# [New Osnaburgh] follow the same practice."
984263bc 1362
bd7414aa
SW
1363# From Garry McKinnon (2006-07-14) via Chris Walton:
1364# I chatted with a member of my board who has an outstanding memory
1365# and a long history in Atikokan (and in the telecom industry) and he
1366# can say for certain that Atikokan has been practicing the current
1367# time keeping since 1952, at least.
ba5ba9da 1368
bd7414aa
SW
1369# From Paul Eggert (2006-07-17):
1370# Shanks & Pottenger say that Atikokan has agreed with Rainy River
1371# ever since standard time was introduced, but the information from
1372# McKinnon sounds more authoritative. For now, assume that Atikokan
1373# switched to EST immediately after WWII era daylight saving time
1374# ended. This matches the old (less-populous) America/Coral_Harbour
1375# entry since our cutoff date of 1970, so we can move
1376# America/Coral_Harbour to the 'backward' file.
1377
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SW
1378# From Mark Brader (2010-03-06):
1379#
1380# Currently the database has:
1381#
1382# # Ontario
1383#
1384# # From Paul Eggert (2006-07-09):
1385# # Shanks & Pottenger write that since 1970 most of Ontario has been like
1386# # Toronto.
1387# # Thunder Bay skipped DST in 1973.
1388# # Many smaller locales did not observe peacetime DST until 1974;
1389# # Nipigon (EST) and Rainy River (CST) are the largest that we know of.
1390#
1391# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom
1392# right corner of page 1, it says that Toronto will return to standard
1393# time at 2 am Sunday morning (which agrees with the database), and that:
1394#
1395# The one-hour setback will go into effect throughout most of Ontario,
1396# except in areas like Windsor which remains on standard time all year.
1397#
1398# Windsor is, of course, a lot larger than Nipigon.
1399#
1400# I only came across this incidentally. I don't know if Windsor began
1401# observing DST when Detroit did, or in 1974, or on some other date.
1402#
1403# By the way, the article continues by noting that:
1404#
1405# Some cities in the United States have pushed the deadline back
1406# three weeks and will change over from daylight saving in October.
1407
1408# From Arthur David Olson (2010-07-17):
1409#
1410# "Standard Time and Time Zones in Canada" appeared in
1411# The Journal of The Royal Astronomical Society of Canada,
1412# volume 26, number 2 (February 1932) and, as of 2010-07-17,
1413# was available at
1414# <a href="http://adsabs.harvard.edu/full/1932JRASC..26...49S">
1415# http://adsabs.harvard.edu/full/1932JRASC..26...49S
1416# </a>
1417#
1418# It includes the text below (starting on page 57):
1419#
1420# A list of the places in Canada using daylight saving time would
1421# require yearly revision. From information kindly furnished by
1422# the provincial governments and by the postmasters in many cities
1423# and towns, it is found that the following places used daylight sav-
1424# ing in 1930. The information for the province of Quebec is definite,
1425# for the other provinces only approximate:
1426#
1427# Province Daylight saving time used
1428# Prince Edward Island Not used.
1429# Nova Scotia In Halifax only.
1430# New Brunswick In St. John only.
1431# Quebec In the following places:
1432# Montreal Lachine
1433# Quebec Mont-Royal
1434# Levis Iberville
1435# St. Lambert Cap de la Madeleine
1436# Verdun Loretteville
1437# Westmount Richmond
1438# Outremont St. Jerome
1439# Longueuil Greenfield Park
1440# Arvida Waterloo
1441# Chambly-Canton Beaulieu
1442# Melbourne La Tuque
1443# St. Theophile Buckingham
1444# Ontario Used generally in the cities and towns along
1445# the southerly part of the province. Not
1446# used in the northwesterlhy part.
1447# Manitoba Not used.
1448# Saskatchewan In Regina only.
1449# Alberta Not used.
1450# British Columbia Not used.
1451#
1452# With some exceptions, the use of daylight saving may be said to be limited
1453# to those cities and towns lying between Quebec city and Windsor, Ont.
1454
bd7414aa 1455# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
ba5ba9da
JR
1456Rule Toronto 1919 only - Mar 30 23:30 1:00 D
1457Rule Toronto 1919 only - Oct 26 0:00 0 S
1458Rule Toronto 1920 only - May 2 2:00 1:00 D
1459Rule Toronto 1920 only - Sep 26 0:00 0 S
1460Rule Toronto 1921 only - May 15 2:00 1:00 D
1461Rule Toronto 1921 only - Sep 15 2:00 0 S
1462Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D
bd7414aa
SW
1463# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16"
1464# was meant.
ba5ba9da
JR
1465Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S
1466Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D
1467# The 1927-to-1939 rules can be expressed more simply as
1468# Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S
1469# Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D
1470# Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D
1471# Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S
1472# The rules below avoid use of Sun>=25
1473# (which pre-2004 versions of zic cannot handle).
1474Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S
1475Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D
1476Rule Toronto 1932 only - May 1 2:00 1:00 D
1477Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D
1478Rule Toronto 1933 only - Oct 1 2:00 0 S
1479Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S
1480Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S
1481Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D
1482Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D
1483Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S
1484Rule Toronto 1949 only - Nov lastSun 0:00 0 S
1485Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D
1486Rule Toronto 1950 only - Nov lastSun 2:00 0 S
1487Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S
bd7414aa
SW
1488# Shanks & Pottenger say Toronto ended DST a week early in 1971,
1489# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this
1490# is wrong, and that he had confirmed it by checking the 1971-10-30
1491# Toronto Star, which said that DST was ending 1971-10-31 as usual.
ba5ba9da
JR
1492Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S
1493
1494# From Paul Eggert (2003-07-27):
1495# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and
1496# Port Arthur, Ontario, the principle of the Bill has been in
1497# operation for the past three years, and in the City of Moose Jaw,
1498# Saskatchewan, for one year."
1499
1500# From David Bryan via Tory Tronrud, Director/Curator,
1501# Thunder Bay Museum (2003-11-12):
1502# There is some suggestion, however, that, by-law or not, daylight
1503# savings time was being practiced in Fort William and Port Arthur
1504# before 1909.... [I]n 1910, the line between the Eastern and Central
1505# Time Zones was permanently moved about two hundred miles west to
1506# include the Thunder Bay area.... When Canada adopted daylight
1507# savings time in 1916, Fort William and Port Arthur, having done so
1508# already, did not change their clocks.... During the Second World
1509# War,... [t]he cities agreed to implement DST during the summer
1510# months for the remainder of the war years.
1511
984263bc 1512# Zone NAME GMTOFF RULES FORMAT [UNTIL]
ba5ba9da
JR
1513Zone America/Toronto -5:17:32 - LMT 1895
1514 -5:00 Canada E%sT 1919
1515 -5:00 Toronto E%sT 1942 Feb 9 2:00s
1516 -5:00 Canada E%sT 1946
1517 -5:00 Toronto E%sT 1974
1518 -5:00 Canada E%sT
984263bc 1519Zone America/Thunder_Bay -5:57:00 - LMT 1895
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JR
1520 -6:00 - CST 1910
1521 -5:00 - EST 1942
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MD
1522 -5:00 Canada E%sT 1970
1523 -5:00 Mont E%sT 1973
1524 -5:00 - EST 1974
1525 -5:00 Canada E%sT
1526Zone America/Nipigon -5:53:04 - LMT 1895
ba5ba9da
JR
1527 -5:00 Canada E%sT 1940 Sep 29
1528 -5:00 1:00 EDT 1942 Feb 9 2:00s
984263bc 1529 -5:00 Canada E%sT
bd7414aa 1530Zone America/Rainy_River -6:18:16 - LMT 1895
ba5ba9da
JR
1531 -6:00 Canada C%sT 1940 Sep 29
1532 -6:00 1:00 CDT 1942 Feb 9 2:00s
984263bc 1533 -6:00 Canada C%sT
bd7414aa
SW
1534Zone America/Atikokan -6:06:28 - LMT 1895
1535 -6:00 Canada C%sT 1940 Sep 29
1536 -6:00 1:00 CDT 1942 Feb 9 2:00s
1537 -6:00 Canada C%sT 1945 Sep 30 2:00
1538 -5:00 - EST
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MD
1539
1540
1541# Manitoba
1542
bd7414aa
SW
1543# From Rob Douglas (2006-04-06):
1544# the old Manitoba Time Act - as amended by Bill 2, assented to
1545# March 27, 1987 ... said ...
1546# "between two o'clock Central Standard Time in the morning of
1547# the first Sunday of April of each year and two o'clock Central
1548# Standard Time in the morning of the last Sunday of October next
1549# following, one hour in advance of Central Standard Time."...
1550# I believe that the English legislation [of the old time act] had =
1551# been assented to (March 22, 1967)....
1552# Also, as far as I can tell, there was no order-in-council varying
1553# the time of Daylight Saving Time for 2005 and so the provisions of
1554# the 1987 version would apply - the changeover was at 2:00 Central
1555# Standard Time (i.e. not until 3:00 Central Daylight Time).
1556
1557# From Paul Eggert (2006-04-10):
1558# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s)
1559# starting 1966. Since 02:00s is clearly correct for 1967 on, assume
1560# it was also 02:00s in 1966.
1561
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MD
1562# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1563Rule Winn 1916 only - Apr 23 0:00 1:00 D
1564Rule Winn 1916 only - Sep 17 0:00 0 S
1565Rule Winn 1918 only - Apr 14 2:00 1:00 D
1566Rule Winn 1918 only - Oct 31 2:00 0 S
1567Rule Winn 1937 only - May 16 2:00 1:00 D
1568Rule Winn 1937 only - Sep 26 2:00 0 S
ba5ba9da
JR
1569Rule Winn 1942 only - Feb 9 2:00 1:00 W # War
1570Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace
984263bc
MD
1571Rule Winn 1945 only - Sep lastSun 2:00 0 S
1572Rule Winn 1946 only - May 12 2:00 1:00 D
1573Rule Winn 1946 only - Oct 13 2:00 0 S
1574Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D
1575Rule Winn 1947 1949 - Sep lastSun 2:00 0 S
1576Rule Winn 1950 only - May 1 2:00 1:00 D
1577Rule Winn 1950 only - Sep 30 2:00 0 S
1578Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D
1579Rule Winn 1951 1958 - Sep lastSun 2:00 0 S
1580Rule Winn 1959 only - Oct lastSun 2:00 0 S
1581Rule Winn 1960 only - Sep lastSun 2:00 0 S
1582Rule Winn 1963 only - Apr lastSun 2:00 1:00 D
1583Rule Winn 1963 only - Sep 22 2:00 0 S
bd7414aa
SW
1584Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D
1585Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S
1586Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D
984263bc
MD
1587# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1588Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16
bd7414aa
SW
1589 -6:00 Winn C%sT 2006
1590 -6:00 Canada C%sT
984263bc
MD
1591
1592
1593# Saskatchewan
1594
ba5ba9da
JR
1595# From Mark Brader (2003-07-26):
1596# The first actual adoption of DST in Canada was at the municipal
1597# level. As the [Toronto] Star put it (1912-06-07), "While people
1598# elsewhere have long been talking of legislation to save daylight,
1599# the city of Moose Jaw [Saskatchewan] has acted on its own hook."
1600# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned:
1601# presumably late evening, as below), and would run until "the end of
1602# the summer". The discrepancy between municipal time and railroad
1603# time was noted.
1604
1605# From Paul Eggert (2003-07-27):
1606# Willett (1914-03) notes that DST "has been in operation ... in the
1607# City of Moose Jaw, Saskatchewan, for one year."
1608
bd7414aa
SW
1609# From Paul Eggert (2006-03-22):
1610# Shanks & Pottenger say that since 1970 this region has mostly been as Regina.
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MD
1611# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972.
1612# Other western towns (e.g. Lloydminster) are like Edmonton.
1613# Matthews and Vincent (1998) write that Denare Beach and Creighton
1614# are like Winnipeg, in violation of Saskatchewan law.
1615
9ffe4b14 1616# From W. Jones (1992-11-06):
984263bc
MD
1617# The. . .below is based on information I got from our law library, the
1618# provincial archives, and the provincial Community Services department.
1619# A precise history would require digging through newspaper archives, and
1620# since you didn't say what you wanted, I didn't bother.
1621#
1622# Saskatchewan is split by a time zone meridian (105W) and over the years
1623# the boundary became pretty ragged as communities near it reevaluated
1624# their affiliations in one direction or the other. In 1965 a provincial
1625# referendum favoured legislating common time practices.
1626#
1627# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of
1628# Saskatchewan 1978) was proclaimed, and established that the eastern
1629# part of Saskatchewan would use CST year round, that districts in
1630# northwest Saskatchewan would by default follow CST but could opt to
1631# follow Mountain Time rules (thus 1 hour difference in the winter and
1632# zero in the summer), and that districts in southwest Saskatchewan would
1633# by default follow MT but could opt to follow CST.
1634#
1635# It took a few years for the dust to settle (I know one story of a town
1636# on one time zone having its school in another, such that a mom had to
1637# serve her family lunch in two shifts), but presently it seems that only
1638# a few towns on the border with Alberta (e.g. Lloydminster) follow MT
1639# rules any more; all other districts appear to have used CST year round
1640# since sometime in the 1960s.
1641
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SW
1642# From Chris Walton (2006-06-26):
1643# The Saskatchewan time act which was last updated in 1996 is about 30 pages
1644# long and rather painful to read.
1645# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf
1646
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MD
1647# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1648Rule Regina 1918 only - Apr 14 2:00 1:00 D
1649Rule Regina 1918 only - Oct 31 2:00 0 S
1650Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D
1651Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S
1652Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D
1653Rule Regina 1937 only - Oct Sun>=8 0:00 0 S
1654Rule Regina 1938 only - Oct Sun>=1 0:00 0 S
1655Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S
ba5ba9da
JR
1656Rule Regina 1942 only - Feb 9 2:00 1:00 W # War
1657Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace
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MD
1658Rule Regina 1945 only - Sep lastSun 2:00 0 S
1659Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D
1660Rule Regina 1946 only - Oct Sun>=8 2:00 0 S
ba5ba9da
JR
1661Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D
1662Rule Regina 1947 1957 - Sep lastSun 2:00 0 S
1663Rule Regina 1959 only - Apr lastSun 2:00 1:00 D
984263bc
MD
1664Rule Regina 1959 only - Oct lastSun 2:00 0 S
1665#
1666Rule Swift 1957 only - Apr lastSun 2:00 1:00 D
1667Rule Swift 1957 only - Oct lastSun 2:00 0 S
1668Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D
1669Rule Swift 1959 only - Oct lastSun 2:00 0 S
1670Rule Swift 1960 1961 - Sep lastSun 2:00 0 S
1671# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1672Zone America/Regina -6:58:36 - LMT 1905 Sep
1673 -7:00 Regina M%sT 1960 Apr lastSun 2:00
1674 -6:00 - CST
1675Zone America/Swift_Current -7:11:20 - LMT 1905 Sep
1676 -7:00 Canada M%sT 1946 Apr lastSun 2:00
1677 -7:00 Regina M%sT 1950
1678 -7:00 Swift M%sT 1972 Apr lastSun 2:00
1679 -6:00 - CST
1680
1681
1682# Alberta
1683
1684# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1685Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D
1686Rule Edm 1918 only - Oct 31 2:00 0 S
1687Rule Edm 1919 only - May 27 2:00 0 S
1688Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D
1689Rule Edm 1920 only - Oct lastSun 2:00 0 S
1690Rule Edm 1921 1923 - Sep lastSun 2:00 0 S
ba5ba9da
JR
1691Rule Edm 1942 only - Feb 9 2:00 1:00 W # War
1692Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace
984263bc
MD
1693Rule Edm 1945 only - Sep lastSun 2:00 0 S
1694Rule Edm 1947 only - Apr lastSun 2:00 1:00 D
1695Rule Edm 1947 only - Sep lastSun 2:00 0 S
1696Rule Edm 1967 only - Apr lastSun 2:00 1:00 D
1697Rule Edm 1967 only - Oct lastSun 2:00 0 S
1698Rule Edm 1969 only - Apr lastSun 2:00 1:00 D
1699Rule Edm 1969 only - Oct lastSun 2:00 0 S
1700Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D
bd7414aa 1701Rule Edm 1972 2006 - Oct lastSun 2:00 0 S
984263bc
MD
1702# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1703Zone America/Edmonton -7:33:52 - LMT 1906 Sep
bd7414aa
SW
1704 -7:00 Edm M%sT 1987
1705 -7:00 Canada M%sT
984263bc
MD
1706
1707
1708# British Columbia
1709
bd7414aa
SW
1710# From Paul Eggert (2006-03-22):
1711# Shanks & Pottenger write that since 1970 most of this region has
1712# been like Vancouver.
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MD
1713# Dawson Creek uses MST. Much of east BC is like Edmonton.
1714# Matthews and Vincent (1998) write that Creston is like Dawson Creek.
1715
1716# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1717Rule Vanc 1918 only - Apr 14 2:00 1:00 D
1718Rule Vanc 1918 only - Oct 31 2:00 0 S
ba5ba9da
JR
1719Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War
1720Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace
984263bc
MD
1721Rule Vanc 1945 only - Sep 30 2:00 0 S
1722Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D
1723Rule Vanc 1946 only - Oct 13 2:00 0 S
1724Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S
bd7414aa 1725Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S
984263bc
MD
1726# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1727Zone America/Vancouver -8:12:28 - LMT 1884
bd7414aa
SW
1728 -8:00 Vanc P%sT 1987
1729 -8:00 Canada P%sT
984263bc
MD
1730Zone America/Dawson_Creek -8:00:56 - LMT 1884
1731 -8:00 Canada P%sT 1947
1732 -8:00 Vanc P%sT 1972 Aug 30 2:00
1733 -7:00 - MST
1734
1735
1736# Northwest Territories, Nunavut, Yukon
1737
bd7414aa 1738# From Paul Eggert (2006-03-22):
984263bc 1739# Dawson switched to PST in 1973. Inuvik switched to MST in 1979.
9ffe4b14 1740# Mathew Englander (1996-10-07) gives the following refs:
984263bc
MD
1741# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
1742# c. 7 defines Yukon standard time as UTC-9. This is still valid;
1743# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).
1744# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.
1745# * O.I.C. 1980/02 established DST.
1746# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00.
bd7414aa
SW
1747# Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go
1748# with Englander.
1749# From Chris Walton (2006-06-26):
1750# Here is a link to the old daylight saving portion of the interpretation
1751# act which was last updated in 1987:
1752# http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf
984263bc
MD
1753
1754# From Rives McDow (1999-09-04):
1755# Nunavut ... moved ... to incorporate the whole territory into one time zone.
1756# <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html">
1757# Nunavut moves to single time zone Oct. 31
1758# </a>
1759#
1760# From Antoine Leca (1999-09-06):
1761# We then need to create a new timezone for the Kitikmeot region of Nunavut
1762# to differentiate it from the Yellowknife region.
1763
1764# From Paul Eggert (1999-09-20):
1765# <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html">
1766# Basic Facts: The New Territory
1767# </a> (1999) reports that Pangnirtung operates on eastern time,
1768# and that Coral Harbour does not observe DST. We don't know when
1769# Pangnirtung switched to eastern time; we'll guess 1995.
984263bc
MD
1770
1771# From Rives McDow (1999-11-08):
1772# On October 31, when the rest of Nunavut went to Central time,
1773# Pangnirtung wobbled. Here is the result of their wobble:
1774#
1775# The following businesses and organizations in Pangnirtung use Central Time:
1776#
1777# First Air, Power Corp, Nunavut Construction, Health Center, RCMP,
1778# Eastern Arctic National Parks, A & D Specialist
1779#
1780# The following businesses and organizations in Pangnirtung use Eastern Time:
1781#
1782# Hamlet office, All other businesses, Both schools, Airport operator
1783#
1784# This has made for an interesting situation there, which warranted the news.
1785# No one there that I spoke with seems concerned, or has plans to
1786# change the local methods of keeping time, as it evidently does not
1787# really interfere with any activities or make things difficult locally.
1788# They plan to celebrate New Year's turn-over twice, one hour apart,
1789# so it appears that the situation will last at least that long.
1790# The Nunavut Intergovernmental Affairs hopes that they will "come to
1791# their senses", but the locals evidently don't see any problem with
1792# the current state of affairs.
1793
1794# From Michaela Rodrigue, writing in the
1795# <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html">
1796# Nunatsiaq News (1999-11-19)</a>:
1797# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones,
1798# central - or Nunavut time - for government offices, and eastern time
1799# for municipal offices and schools.... Igloolik [was similar but then]
1800# made the switch to central time on Saturday, Nov. 6.
1801
1802# From Paul Eggert (2000-10-02):
1803# Matthews and Vincent (1998) say the following, but we lack histories
1804# for these potential new Zones.
1805#
1806# The Canadian Forces station at Alert uses Eastern Time while the
1807# handful of residents at the Eureka weather station [in the Central
1808# zone] skip daylight savings. Baffin Island, which is crossed by the
1809# Central, Eastern and Atlantic Time zones only uses Eastern Time.
1810# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of
1811# Central Time and Southampton Island [in the Central zone] is not
1812# required to use daylight savings.
1813
1814# From
1815# <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html">
1816# Nunavut now has two time zones
1817# </a> (2000-11-10):
1818# The Nunavut government would allow its employees in Kugluktuk and
1819# Cambridge Bay to operate on central time year-round, putting them
1820# one hour behind the rest of Nunavut for six months during the winter.
1821# At the end of October the two communities had rebelled against
1822# Nunavut's unified time zone, refusing to shift to eastern time with
1823# the rest of the territory for the winter. Cambridge Bay remained on
1824# central time, while Kugluktuk, even farther west, reverted to
1825# mountain time, which they had used before the advent of Nunavut's
1826# unified time zone in 1999.
1827#
1828# From Rives McDow (2001-01-20), quoting the Nunavut government:
1829# The preceding decision came into effect at midnight, Saturday Nov 4, 2000.
1830
1831# From Paul Eggert (2000-12-04):
1832# Let's just keep track of the official times for now.
1833
1834# From Rives McDow (2001-03-07):
1835# The premier of Nunavut has issued a ministerial statement advising
1836# that effective 2001-04-01, the territory of Nunavut will revert
1837# back to three time zones (mountain, central, and eastern). Of the
1838# cities in Nunavut, Coral Harbor is the only one that I know of that
1839# has said it will not observe dst, staying on EST year round. I'm
1840# checking for more info, and will get back to you if I come up with
1841# more.
1842# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).]
1843
9ffe4b14
SW
1844# From Gwillim Law (2005-05-21):
1845# According to maps at
1846# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg
1847# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg
1848# (both dated 2003), and
1849# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp
1850# (from a 1998 Canadian Geographic article), the de facto and de jure time
1851# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year
1852# round. Using Google, it's easy to find other websites that confirm this.
1853# I wasn't able to find how far back this time regimen goes, but since it
1854# predates the creation of Nunavut, it probably goes back many years....
1855# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used.
1856#
1857# From Paul Eggert (2005-07-26):
1858# For lack of better information, assume that Southampton Island observed
1859# daylight saving only during wartime.
1860
8393cd87
SW
1861# From Chris Walton (2007-03-01):
1862# ... the community of Resolute (located on Cornwallis Island in
1863# Nunavut) moved from Central Time to Eastern Time last November.
1864# Basically the community did not change its clocks at the end of
1865# daylight saving....
1866# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html
1867
1868# From Chris Walton (2007-03-14):
1869# Today I phoned the "hamlet office" to find out what Resolute was doing with
1870# its clocks.
1871#
1872# The individual that answered the phone confirmed that the clocks did not
1873# move at the end of daylight saving on October 29/2006. He also told me that
1874# the clocks did not move this past weekend (March 11/2007)....
09695390
SW
1875
1876# From Chris Walton (2008-11-13):
1877# ...the residents of Resolute believe that they are changing "time zones"
1878# twice a year. In winter months, local time is qualified with "Eastern
1879# Time" which is really "Eastern Standard Time (UTC-5)". In summer
1880# months, local time is qualified with "Central Time" which is really
1881# "Central Daylight Time (UTC-5)"...
8393cd87 1882
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MD
1883# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1884Rule NT_YK 1918 only - Apr 14 2:00 1:00 D
1885Rule NT_YK 1918 only - Oct 27 2:00 0 S
1886Rule NT_YK 1919 only - May 25 2:00 1:00 D
1887Rule NT_YK 1919 only - Nov 1 0:00 0 S
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1888Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War
1889Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace
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1890Rule NT_YK 1945 only - Sep 30 2:00 0 S
1891Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD
1892Rule NT_YK 1965 only - Oct lastSun 2:00 0 S
1893Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D
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1894Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S
1895Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D
984263bc 1896# Zone NAME GMTOFF RULES FORMAT [UNTIL]
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1897# aka Panniqtuuq
1898Zone America/Pangnirtung 0 - zzz 1921 # trading post est.
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1899 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00
1900 -5:00 Canada E%sT 1999 Oct 31 2:00
1901 -6:00 Canada C%sT 2000 Oct 29 2:00
1902 -5:00 Canada E%sT
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1903# formerly Frobisher Bay
1904Zone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est.
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1905 -5:00 NT_YK E%sT 1999 Oct 31 2:00
1906 -6:00 Canada C%sT 2000 Oct 29 2:00
1907 -5:00 Canada E%sT
8393cd87 1908# aka Qausuittuq
09695390
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1909# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1910Rule Resolute 2006 max - Nov Sun>=1 2:00 0 ES
1911Rule Resolute 2007 max - Mar Sun>=8 2:00 0 CD
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1912Zone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded
1913 -6:00 NT_YK C%sT 2000 Oct 29 2:00
1914 -5:00 - EST 2001 Apr 1 3:00
1915 -6:00 Canada C%sT 2006 Oct 29 2:00
09695390 1916 -5:00 Resolute %sT
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1917# aka Kangiqiniq
1918Zone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded
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1919 -6:00 NT_YK C%sT 2000 Oct 29 2:00
1920 -5:00 - EST 2001 Apr 1 3:00
1921 -6:00 Canada C%sT
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1922# aka Iqaluktuuttiaq
1923Zone America/Cambridge_Bay 0 - zzz 1920 # trading post est.?
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1924 -7:00 NT_YK M%sT 1999 Oct 31 2:00
1925 -6:00 Canada C%sT 2000 Oct 29 2:00
1926 -5:00 - EST 2000 Nov 5 0:00
1927 -6:00 - CST 2001 Apr 1 3:00
1928 -7:00 Canada M%sT
8393cd87 1929Zone America/Yellowknife 0 - zzz 1935 # Yellowknife founded?
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1930 -7:00 NT_YK M%sT 1980
1931 -7:00 Canada M%sT
8393cd87 1932Zone America/Inuvik 0 - zzz 1953 # Inuvik founded
984263bc 1933 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00
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1934 -7:00 NT_YK M%sT 1980
1935 -7:00 Canada M%sT
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1936Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20
1937 -9:00 NT_YK Y%sT 1966 Jul 1 2:00
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1938 -8:00 NT_YK P%sT 1980
1939 -8:00 Canada P%sT
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1940Zone America/Dawson -9:17:40 - LMT 1900 Aug 20
1941 -9:00 NT_YK Y%sT 1973 Oct 28 0:00
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1942 -8:00 NT_YK P%sT 1980
1943 -8:00 Canada P%sT
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1944
1945
1946###############################################################################
1947
1948# Mexico
1949
1950# From Paul Eggert (2001-03-05):
1951# The Investigation and Analysis Service of the
1952# Mexican Library of Congress (MLoC) has published a
1953# <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/">
1954# history of Mexican local time (in Spanish)
1955# </a>.
1956#
bd7414aa 1957# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC.
984263bc 1958# (In all cases we go with the MLoC.)
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1959# S&P report that Baja was at -8:00 in 1922/1923.
1960# S&P say the 1930 transition in Baja was 1930-11-16.
1961# S&P report no DST during summer 1931.
1962# S&P report a transition at 1932-03-30 23:00, not 1932-04-01.
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1963
1964# From Gwillim Law (2001-02-20):
1965# There are some other discrepancies between the Decrees page and the
1966# tz database. I think they can best be explained by supposing that
1967# the researchers who prepared the Decrees page failed to find some of
1968# the relevant documents.
1969
9ffe4b14 1970# From Alan Perry (1996-02-15):
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1971# A guy from our Mexico subsidiary finally found the Presidential Decree
1972# outlining the timezone changes in Mexico.
1973#
1974# ------------- Begin Forwarded Message -------------
1975#
1976# I finally got my hands on the Official Presidential Decree that sets up the
1977# rules for the DST changes. The rules are:
1978#
1979# 1. The country is divided in 3 timezones:
1980# - Baja California Norte (the Mexico/BajaNorte TZ)
1981# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ)
1982# - The rest of the country (the Mexico/General TZ)
1983#
1984# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October
1985# at 2:00 AM, the times in each zone are as follows:
1986# BajaNorte: GMT+7
1987# BajaSur: GMT+6
1988# General: GMT+5
1989#
1990# 3. The rest of the year, the times are as follows:
1991# BajaNorte: GMT+8
1992# BajaSur: GMT+7
1993# General: GMT+6
1994#
1995# The Decree was published in Mexico's Official Newspaper on January 4th.
1996#
1997# -------------- End Forwarded Message --------------
1998# From Paul Eggert (1996-06-12):
1999# For an English translation of the decree, see
2000# <a href="http://mexico-travel.com/extra/timezone_eng.html">
2001# ``Diario Oficial: Time Zone Changeover'' (1996-01-04).
2002# </a>
2003
2004# From Rives McDow (1998-10-08):
2005# The State of Quintana Roo has reverted back to central STD and DST times
2006# (i.e. UTC -0600 and -0500 as of 1998-08-02).
2007
2008# From Rives McDow (2000-01-10):
2009# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time
2010# zone 5 hours from the International Date Line, and will not observe daylight
2011# savings time so as to stay on the same time zone as the southern part of
2012# Arizona year round.
2013
2014# From Jesper Norgaard, translating
2015# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17):
2016# In Oaxaca, the 55.000 teachers from the Section 22 of the National
2017# Syndicate of Education Workers, refuse to apply daylight saving each
2018# year, so that the more than 10,000 schools work at normal hour the
2019# whole year.
2020
2021# From Gwillim Law (2001-01-19):
2022# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says
2023# (translated):...
2024# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced
2025# that Summer Time will be reduced from seven to five months, starting
2026# this year....
2027# <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001>
2028# [translated], says "summer time will ... take effect on the first Sunday
2029# in May, and end on the last Sunday of September.
2030
2031# From Arthur David Olson (2001-01-25):
2032# The 2001-01-24 traditional Washington Post contained the page one
2033# story "Timely Issue Divides Mexicans."...
2034# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html
2035# ... Mexico City Mayor Lopez Obrador "...is threatening to keep
2036# Mexico City and its 20 million residents on a different time than
2037# the rest of the country..." In particular, Lopez Obrador would abolish
2038# observation of Daylight Saving Time.
2039
2040# <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre">
2041# Official statute published by the Energy Department
2042# </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules,
2043# and Sonora with no DST. This was reported by Jesper Norgaard (2001-02-03).
2044
2045# From Paul Eggert (2001-03-03):
2046#
2047# <a href="http://www.latimes.com/news/nation/20010303/t000018766.html">
2048# James F. Smith writes in today's LA Times
2049# </a>
2050# * Sonora will continue to observe standard time.
2051# * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that
2052# the Federal District will not adopt DST.
2053# * 4 of 16 district leaders announced they'll ignore the decree.
2054# * The decree does not affect federal-controlled facilities including
2055# the airport, banks, hospitals, and schools.
2056#
2057# For now we'll assume that the Federal District will bow to federal rules.
2058
2059# From Jesper Norgaard (2001-04-01):
2060# I found some references to the Mexican application of daylight
2061# saving, which modifies what I had already sent you, stating earlier
2062# that a number of northern Mexican states would go on daylight
2063# saving. The modification reverts this to only cover Baja California
2064# (Norte), while all other states (except Sonora, who has no daylight
2065# saving all year) will follow the original decree of president
2066# Vicente Fox, starting daylight saving May 6, 2001 and ending
2067# September 30, 2001.
2068# References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp>
2069# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31)
2070
2071# From Reuters (2001-09-04):
2072# Mexico's Supreme Court on Tuesday declared that daylight savings was
2073# unconstitutional in Mexico City, creating the possibility the
2074# capital will be in a different time zone from the rest of the nation
2075# next year.... The Supreme Court's ruling takes effect at 2:00
2076# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to
2077# standard time. "This is so residents of the Federal District are not
2078# subject to unexpected time changes," a statement from the court said.
2079
2080# From Jesper Norgaard Welen (2002-03-12):
2081# ... consulting my local grocery store(!) and my coworkers, they all insisted
2082# that a new decision had been made to reinstate US style DST in Mexico....
2083# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20)
2084# confirms this. Sonora as usual is the only state where DST is not applied.
2085
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2086# From Steffen Thorsen (2009-12-28):
2087#
2088# Steffen Thorsen wrote:
2089# > Mexico's House of Representatives has approved a proposal for northern
2090# > Mexico's border cities to share the same daylight saving schedule as
2091# > the United States.
2092# Now this has passed both the Congress and the Senate, so starting from
2093# 2010, some border regions will be the same:
2094# <a href="http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/">
2095# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/
2096# </a>
2097# <a href="http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939">
2098# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939
2099# </a>
2100# (Spanish)
2101#
2102# Could not find the new law text, but the proposed law text changes are here:
2103# <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf">
2104# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf
2105# </a>
2106# (Gaceta Parlamentaria)
2107#
2108# There is also a list of the votes here:
2109# <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html">
2110# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html
2111# </a>
2112#
2113# Our page:
2114# <a href="http://www.timeanddate.com/news/time/north-mexico-dst-change.html">
2115# http://www.timeanddate.com/news/time/north-mexico-dst-change.html
2116# </a>
2117
2118# From Arthur David Olson (2010-01-20):
2119# The page
2120# <a href="http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010">
2121# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010
2122# </a>
2123# includes this text:
2124# En los municipios fronterizos de Tijuana y Mexicali en Baja California;
2125# Ju&aacute;rez y Ojinaga en Chihuahua; Acu&ntilde;a y Piedras Negras en Coahuila;
2126# An&aacute;huac en Nuevo Le&oacute;n; y Nuevo Laredo, Reynosa y Matamoros en
2127# Tamaulipas, la aplicaci&oacute;n de este horario estacional surtir&aacute; efecto
2128# desde las dos horas del segundo domingo de marzo y concluir&aacute; a las dos
2129# horas del primer domingo de noviembre.
2130# En los municipios fronterizos que se encuentren ubicados en la franja
2131# fronteriza norte en el territorio comprendido entre la l&iacute;nea
2132# internacional y la l&iacute;nea paralela ubicada a una distancia de veinte
2133# kil&oacute;metros, as&iacute; como la Ciudad de Ensenada, Baja California, hacia el
2134# interior del pa&iacute;s, la aplicaci&oacute;n de este horario estacional surtir&aacute;
2135# efecto desde las dos horas del segundo domingo de marzo y concluir&aacute; a
2136# las dos horas del primer domingo de noviembre.
2137
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2138# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2139Rule Mexico 1939 only - Feb 5 0:00 1:00 D
2140Rule Mexico 1939 only - Jun 25 0:00 0 S
2141Rule Mexico 1940 only - Dec 9 0:00 1:00 D
2142Rule Mexico 1941 only - Apr 1 0:00 0 S
ba5ba9da 2143Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War
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2144Rule Mexico 1944 only - May 1 0:00 0 S
2145Rule Mexico 1950 only - Feb 12 0:00 1:00 D
2146Rule Mexico 1950 only - Jul 30 0:00 0 S
2147Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D
2148Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S
2149Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D
2150Rule Mexico 2001 only - Sep lastSun 2:00 0 S
2151Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D
2152Rule Mexico 2002 max - Oct lastSun 2:00 0 S
2153# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2154# Quintana Roo
2155Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56
2156 -6:00 - CST 1981 Dec 23
2157 -5:00 Mexico E%sT 1998 Aug 2 2:00
2158 -6:00 Mexico C%sT
2159# Campeche, Yucatan
2160Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32
2161 -6:00 - CST 1981 Dec 23
2162 -5:00 - EST 1982 Dec 2
2163 -6:00 Mexico C%sT
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2164# Coahuila, Durango, Nuevo Leon, Tamaulipas (near US border)
2165Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00
2166 -6:00 - CST 1988
2167 -6:00 US C%sT 1989
2168 -6:00 Mexico C%sT 2010
2169 -6:00 US C%sT
2170# Coahuila, Durango, Nuevo Leon, Tamaulipas (away from US border)
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2171Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44
2172 -6:00 - CST 1988
2173 -6:00 US C%sT 1989
2174 -6:00 Mexico C%sT
2175# Central Mexico
f68bfda6 2176Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24
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2177 -7:00 - MST 1927 Jun 10 23:00
2178 -6:00 - CST 1930 Nov 15
2179 -7:00 - MST 1931 May 1 23:00
2180 -6:00 - CST 1931 Oct
2181 -7:00 - MST 1932 Apr 1
2182 -6:00 Mexico C%sT 2001 Sep 30 02:00
2183 -6:00 - CST 2002 Feb 20
2184 -6:00 Mexico C%sT
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2185# Chihuahua (near US border)
2186Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20
2187 -7:00 - MST 1927 Jun 10 23:00
2188 -6:00 - CST 1930 Nov 15
2189 -7:00 - MST 1931 May 1 23:00
2190 -6:00 - CST 1931 Oct
2191 -7:00 - MST 1932 Apr 1
2192 -6:00 - CST 1996
2193 -6:00 Mexico C%sT 1998
2194 -6:00 - CST 1998 Apr Sun>=1 3:00
2195 -7:00 Mexico M%sT 2010
2196 -7:00 US M%sT
2197# Chihuahua (away from US border)
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2198Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40
2199 -7:00 - MST 1927 Jun 10 23:00
2200 -6:00 - CST 1930 Nov 15
2201 -7:00 - MST 1931 May 1 23:00
2202 -6:00 - CST 1931 Oct
2203 -7:00 - MST 1932 Apr 1
2204 -6:00 - CST 1996
2205 -6:00 Mexico C%sT 1998
2206 -6:00 - CST 1998 Apr Sun>=1 3:00
2207 -7:00 Mexico M%sT
2208# Sonora
2209Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08
2210 -7:00 - MST 1927 Jun 10 23:00
2211 -6:00 - CST 1930 Nov 15
2212 -7:00 - MST 1931 May 1 23:00
2213 -6:00 - CST 1931 Oct
2214 -7:00 - MST 1932 Apr 1
2215 -6:00 - CST 1942 Apr 24
2216 -7:00 - MST 1949 Jan 14
2217 -8:00 - PST 1970
2218 -7:00 Mexico M%sT 1999
2219 -7:00 - MST
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2220
2221# From Alexander Krivenyshev (2010-04-21):
2222# According to news, Bah&iacute;a de Banderas (Mexican state of Nayarit)
2223# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to
2224# share the same time zone as nearby city Puerto Vallarta, Jalisco).
2225#
2226# (Spanish)
2227# Bah&iacute;a de Banderas homologa su horario al del centro del
2228# pa&iacute;s, a partir de este domingo
2229# <a href="http://www.nayarit.gob.mx/notes.asp?id=20748">
2230# http://www.nayarit.gob.mx/notes.asp?id=20748
2231# </a>
2232#
2233# Bah&iacute;a de Banderas homologa su horario con el del Centro del
2234# Pa&iacute;s
2235# <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">
2236# 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"
2237# </a>
2238#
2239# (English)
2240# Puerto Vallarta and Bah&iacute;a de Banderas: One Time Zone
2241# <a href="http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml">
2242# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml
2243# </a>
2244#
2245# or
2246# <a href="http://www.worldtimezone.com/dst_news/dst_news_mexico08.html">
2247# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html
2248# </a>
2249#
2250# "Mexico's Senate approved the amendments to the Mexican Schedule System that
2251# will allow Bah&iacute;a de Banderas and Puerto Vallarta to share the same time
2252# zone ..."
984263bc 2253# Baja California Sur, Nayarit, Sinaloa
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2254
2255# From Arthur David Olson (2010-05-01):
2256# Use "Bahia_Banderas" to keep the name to fourteen characters.
2257
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2258Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20
2259 -7:00 - MST 1927 Jun 10 23:00
2260 -6:00 - CST 1930 Nov 15
2261 -7:00 - MST 1931 May 1 23:00
2262 -6:00 - CST 1931 Oct
2263 -7:00 - MST 1932 Apr 1
2264 -6:00 - CST 1942 Apr 24
2265 -7:00 - MST 1949 Jan 14
2266 -8:00 - PST 1970
2267 -7:00 Mexico M%sT
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2268
2269Zone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00
2270 -7:00 - MST 1927 Jun 10 23:00
2271 -6:00 - CST 1930 Nov 15
2272 -7:00 - MST 1931 May 1 23:00
2273 -6:00 - CST 1931 Oct
2274 -7:00 - MST 1932 Apr 1
2275 -6:00 - CST 1942 Apr 24
2276 -7:00 - MST 1949 Jan 14
2277 -8:00 - PST 1970
25d38d10 2278 -7:00 Mexico M%sT 2010 Apr 4 2:00
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2279 -6:00 Mexico C%sT
2280
f68bfda6 2281# Baja California (near US border)
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2282Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56
2283 -7:00 - MST 1924
2284 -8:00 - PST 1927 Jun 10 23:00
2285 -7:00 - MST 1930 Nov 15
2286 -8:00 - PST 1931 Apr 1
2287 -8:00 1:00 PDT 1931 Sep 30
f68bfda6
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2288 -8:00 - PST 1942 Apr 24
2289 -8:00 1:00 PWT 1945 Aug 14 23:00u
2290 -8:00 1:00 PPT 1945 Nov 12 # Peace
2291 -8:00 - PST 1948 Apr 5
2292 -8:00 1:00 PDT 1949 Jan 14
2293 -8:00 - PST 1954
2294 -8:00 CA P%sT 1961
2295 -8:00 - PST 1976
2296 -8:00 US P%sT 1996
2297 -8:00 Mexico P%sT 2001
2298 -8:00 US P%sT 2002 Feb 20
2299 -8:00 Mexico P%sT 2010
2300 -8:00 US P%sT
2301# Baja California (away from US border)
2302Zone America/Santa_Isabel -7:39:28 - LMT 1922 Jan 1 0:20:32
2303 -7:00 - MST 1924
2304 -8:00 - PST 1927 Jun 10 23:00
2305 -7:00 - MST 1930 Nov 15
2306 -8:00 - PST 1931 Apr 1
2307 -8:00 1:00 PDT 1931 Sep 30
984263bc 2308 -8:00 - PST 1942 Apr 24
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2309 -8:00 1:00 PWT 1945 Aug 14 23:00u
2310 -8:00 1:00 PPT 1945 Nov 12 # Peace
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2311 -8:00 - PST 1948 Apr 5
2312 -8:00 1:00 PDT 1949 Jan 14
2313 -8:00 - PST 1954
2314 -8:00 CA P%sT 1961
2315 -8:00 - PST 1976
2316 -8:00 US P%sT 1996
2317 -8:00 Mexico P%sT 2001
2318 -8:00 US P%sT 2002 Feb 20
2319 -8:00 Mexico P%sT
bd7414aa 2320# From Paul Eggert (2006-03-22):
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MD
2321# Formerly there was an America/Ensenada zone, which differed from
2322# America/Tijuana only in that it did not observe DST from 1976
bd7414aa
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2323# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say
2324# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports
984263bc 2325# that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and
bd7414aa 2326# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that
984263bc
MD
2327# DST-observance was a town-by-town matter back then. This concerns
2328# data after 1970 so most likely there should be at least one Zone
2329# other than America/Tijuana for Baja, but it's not clear yet what its
2330# name or contents should be.
2331#
2332# Revillagigedo Is
2333# no information
2334
2335###############################################################################
2336
2337# Anguilla
2338# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2339Zone America/Anguilla -4:12:16 - LMT 1912 Mar 2
2340 -4:00 - AST
2341
2342# Antigua and Barbuda
2343# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2344Zone America/Antigua -4:07:12 - LMT 1912 Mar 2
2345 -5:00 - EST 1951
2346 -4:00 - AST
2347
2348# Bahamas
880368e2
SW
2349#
2350# From Sue Williams (2006-12-07):
8393cd87 2351# The Bahamas announced about a month ago that they plan to change their DST
880368e2
SW
2352# rules to sync with the U.S. starting in 2007....
2353# http://www.jonesbahamas.com/?c=45&a=10412
2354
984263bc 2355# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
a36b983e
SW
2356Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S
2357Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D
984263bc
MD
2358# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2359Zone America/Nassau -5:09:24 - LMT 1912 Mar 2
880368e2
SW
2360 -5:00 Bahamas E%sT 1976
2361 -5:00 US E%sT
984263bc
MD
2362
2363# Barbados
2364# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2365Rule Barb 1977 only - Jun 12 2:00 1:00 D
2366Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S
2367Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D
2368Rule Barb 1979 only - Sep 30 2:00 0 S
2369Rule Barb 1980 only - Sep 25 2:00 0 S
2370# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2371Zone America/Barbados -3:58:28 - LMT 1924 # Bridgetown
2372 -3:58:28 - BMT 1932 # Bridgetown Mean Time
2373 -4:00 Barb A%sT
2374
2375# Belize
bd7414aa 2376# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger.
984263bc
MD
2377# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2378Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD
2379Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S
2380Rule Belize 1973 only - Dec 5 0:00 1:00 D
2381Rule Belize 1974 only - Feb 9 0:00 0 S
2382Rule Belize 1982 only - Dec 18 0:00 1:00 D
2383Rule Belize 1983 only - Feb 12 0:00 0 S
2384# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2385Zone America/Belize -5:52:48 - LMT 1912 Apr
2386 -6:00 Belize C%sT
2387
2388# Bermuda
bd7414aa
SW
2389
2390# From Dan Jones, reporting in The Royal Gazette (2006-06-26):
2391
2392# Next year, however, clocks in the US will go forward on the second Sunday
2393# in March, until the first Sunday in November. And, after the Time Zone
2394# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on
2395# Friday, the same thing will happen in Bermuda.
2396# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135
2397
984263bc
MD
2398# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2399Zone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton
2400 -4:00 - AST 1974 Apr 28 2:00
bd7414aa
SW
2401 -4:00 Bahamas A%sT 1976
2402 -4:00 US A%sT
984263bc
MD
2403
2404# Cayman Is
2405# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2406Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown
2407 -5:07:12 - KMT 1912 Feb # Kingston Mean Time
2408 -5:00 - EST
2409
2410# Costa Rica
2411# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2412Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D
2413Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S
2414Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D
bd7414aa
SW
2415# IATA SSIM (1991-09) says the following was at 1:00;
2416# go with Shanks & Pottenger.
984263bc
MD
2417Rule CR 1991 only - Jul 1 0:00 0 S
2418Rule CR 1992 only - Mar 15 0:00 0 S
2419# There are too many San Joses elsewhere, so we'll use `Costa Rica'.
2420# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2421Zone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose
2422 -5:36:20 - SJMT 1921 Jan 15 # San Jose Mean Time
2423 -6:00 CR C%sT
2424# Coco
2425# no information; probably like America/Costa_Rica
2426
2427# Cuba
2428
2429# From Arthur David Olson (1999-03-29):
2430# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between
2431# the Cuban National Team and the Baltimore Orioles was carried live on
2432# the Orioles Radio Network, including affiliate WTOP in Washington, DC.
2433# During the game, play-by-play announcer Jim Hunter noted that
2434# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving
2435# Time today." (The "two hour" remark referred to losing one hour of
2436# sleep on 1999-03-28--when the announcers were in Cuba as it switched
2437# to DST--and one more hour on 1999-04-04--when the announcers will have
2438# returned to Baltimore, which switches on that date.)
2439
bc95ec93
SW
2440# From Evert van der Veer via Steffen Thorsen (2004-10-28):
2441# Cuba is not going back to standard time this year.
bd7414aa 2442# From Paul Eggert (2006-03-22):
bc95ec93
SW
2443# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html
2444# says that it's due to a problem at the Antonio Guiteras
2445# thermoelectric plant, and says "This October there will be no return
2446# to normal hours (after daylight saving time)".
bd7414aa 2447# For now, let's assume that it's a temporary measure.
bc95ec93 2448
aa65d21a
SW
2449# From Carlos A. Carnero Delgado (2005-11-12):
2450# This year (just like in 2004-2005) there's no change in time zone
2451# adjustment in Cuba. We will stay in daylight saving time:
2452# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html
2453
ff8424c5
SW
2454# From Jesper Norgaard Welen (2006-10-21):
2455# An article in GRANMA INTERNACIONAL claims that Cuba will end
2456# the 3 years of permanent DST next weekend, see
2457# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html
2458# "On Saturday night, October 28 going into Sunday, October 29, at 01:00,
2459# watches should be set back one hour -- going back to 00:00 hours -- returning
2460# to the normal schedule....
bd7414aa 2461
8393cd87
SW
2462# From Paul Eggert (2007-03-02):
2463# http://www.granma.cubaweb.cu/english/news/art89.html, dated yesterday,
2464# says Cuban clocks will advance at midnight on March 10.
2465# For lack of better information, assume Cuba will use US rules,
2466# except that it switches at midnight standard time as usual.
1aec505f
SW
2467#
2468# From Steffen Thorsen (2007-10-25):
ef5158c8 2469# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week
1aec505f 2470# earlier - on the last Sunday of October, just like in 2006.
ef5158c8 2471#
1aec505f 2472# He supplied these references:
ef5158c8 2473#
1aec505f
SW
2474# http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES
2475# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm
ef5158c8 2476#
1aec505f
SW
2477# From Alex Kryvenishev (2007-10-25):
2478# Here is also article from Granma (Cuba):
ef5158c8 2479#
1aec505f
SW
2480# [Regira] el Horario Normal desde el [proximo] domingo 28 de octubre
2481# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html
ef5158c8 2482#
1aec505f 2483# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html
8393cd87 2484
e4a74243
SW
2485# From Arthur David Olson (2008-03-09):
2486# I'm in Maryland which is now observing United States Eastern Daylight
2487# Time. At 9:44 local time I used RealPlayer to listen to
2488# <a href="http://media.enet.cu/radioreloj">
2489# http://media.enet.cu/radioreloj
2490# </a>, a Cuban information station, and heard
2491# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"),
2492# indicating that Cuba is still on standard time.
2493
2494# From Steffen Thorsen (2008-03-12):
2495# It seems that Cuba will start DST on Sunday, 2007-03-16...
2496# It was announced yesterday, according to this source (in Spanish):
2497# <a href="http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm">
2498# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm
2499# </a>
2500#
2501# Some more background information is posted here:
2502# <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html">
2503# http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html
2504# </a>
2505#
2506# The article also says that Cuba has been observing DST since 1963,
2507# while Shanks (and tzdata) has 1965 as the first date (except in the
2508# 1940's). Many other web pages in Cuba also claim that it has been
2509# observed since 1963, but with the exception of 1970 - an exception
2510# which is not present in tzdata/Shanks. So there is a chance we need to
2511# change some historic records as well.
2512#
2513# One example:
2514# <a href="http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm">
2515# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm
2516# </a>
2517
2518# From Jesper Norgaard Welen (2008-03-13):
2519# The Cuban time change has just been confirmed on the most authoritative
2520# web site, the Granma. Please check out
2521# <a href="http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html">
2522# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html
2523# </a>
2524#
2525# Basically as expected after Steffen Thorsens information, the change
2526# will take place midnight between Saturday and Sunday.
2527
2528# From Arthur David Olson (2008-03-12):
2529# Assume Sun>=15 (third Sunday) going forward.
2530
8073154a
SW
2531# From Alexander Krivenyshev (2009-03-04)
2532# According to the Radio Reloj - Cuba will start Daylight Saving Time on
2533# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009-
2534# not on midnight March 14 / March 15 as previously thought.
2535#
2536# <a href="http://www.worldtimezone.com/dst_news/dst_news_cuba05.html">
2537# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html
2538# (in Spanish)
2539# </a>
2540
2541# From Arthur David Olson (2009-03-09)
2542# I listened over the Internet to
2543# <a href="http://media.enet.cu/readioreloj">
2544# http://media.enet.cu/readioreloj
2545# </a>
2546# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the
2547# the time was announced as "diez cinco"--the same time as here, indicating
2548# that has indeed switched to DST. Assume second Sunday from 2009 forward.
2549
984263bc
MD
2550# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2551Rule Cuba 1928 only - Jun 10 0:00 1:00 D
2552Rule Cuba 1928 only - Oct 10 0:00 0 S
2553Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D
2554Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S
2555Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D
2556Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S
2557Rule Cuba 1965 only - Jun 1 0:00 1:00 D
2558Rule Cuba 1965 only - Sep 30 0:00 0 S
2559Rule Cuba 1966 only - May 29 0:00 1:00 D
2560Rule Cuba 1966 only - Oct 2 0:00 0 S
2561Rule Cuba 1967 only - Apr 8 0:00 1:00 D
2562Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S
2563Rule Cuba 1968 only - Apr 14 0:00 1:00 D
2564Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D
2565Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S
2566Rule Cuba 1972 1974 - Oct 8 0:00 0 S
2567Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S
2568Rule Cuba 1978 only - May 7 0:00 1:00 D
2569Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S
2570Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D
2571Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D
2572Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D
2573Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D
2574Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S
2575Rule Cuba 1996 only - Oct 6 0:00s 0 S
2576Rule Cuba 1997 only - Oct 12 0:00s 0 S
2577Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D
bc95ec93 2578Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S
09695390 2579Rule Cuba 2000 2004 - Apr Sun>=1 0:00s 1:00 D
1aec505f 2580Rule Cuba 2006 max - Oct lastSun 0:00s 0 S
e4a74243 2581Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D
8073154a
SW
2582Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D
2583Rule Cuba 2009 max - Mar Sun>=8 0:00s 1:00 D
984263bc
MD
2584
2585# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2586Zone America/Havana -5:29:28 - LMT 1890
2587 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT
2588 -5:00 Cuba C%sT
2589
2590# Dominica
2591# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2592Zone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau
2593 -4:00 - AST
2594
2595# Dominican Republic
2596
2597# From Steffen Thorsen (2000-10-30):
2598# Enrique Morales reported to me that the Dominican Republic has changed the
2599# time zone to Eastern Standard Time as of Sunday 29 at 2 am....
2600# http://www.listin.com.do/antes/261000/republica/princi.html
2601
2602# From Paul Eggert (2000-12-04):
2603# That URL (2000-10-26, in Spanish) says they planned to use US-style DST.
2604
2605# From Rives McDow (2000-12-01):
2606# Dominican Republic changed its mind and presidential decree on Tuesday,
2607# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the
2608# Dominican Republic will be reverting to 8 hours from the International Date
2609# Line, and will not be using DST in the foreseeable future. The reason they
2610# decided to use DST was to be in synch with Puerto Rico, who was also going
2611# to implement DST. When Puerto Rico didn't implement DST, the president
2612# decided to revert.
2613
2614
2615# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2616Rule DR 1966 only - Oct 30 0:00 1:00 D
2617Rule DR 1967 only - Feb 28 0:00 0 S
2618Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD
2619Rule DR 1970 only - Feb 21 0:00 0 S
2620Rule DR 1971 only - Jan 20 0:00 0 S
2621Rule DR 1972 1974 - Jan 21 0:00 0 S
2622# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2623Zone America/Santo_Domingo -4:39:36 - LMT 1890
2624 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT
2625 -5:00 DR E%sT 1974 Oct 27
2626 -4:00 - AST 2000 Oct 29 02:00
2627 -5:00 US E%sT 2000 Dec 3 01:00
2628 -4:00 - AST
2629
2630# El Salvador
bd7414aa 2631
984263bc
MD
2632# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2633Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D
2634Rule Salv 1987 1988 - Sep lastSun 0:00 0 S
ba5ba9da
JR
2635# There are too many San Salvadors elsewhere, so use America/El_Salvador
2636# instead of America/San_Salvador.
984263bc
MD
2637# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2638Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador
2639 -6:00 Salv C%sT
2640
2641# Grenada
2642# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2643Zone America/Grenada -4:07:00 - LMT 1911 Jul # St George's
2644 -4:00 - AST
2645
2646# Guadeloupe
2647# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2648Zone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre
2649 -4:00 - AST
9d5f55b0
SW
2650# St Barthelemy
2651Link America/Guadeloupe America/St_Barthelemy
2652# St Martin (French part)
2653Link America/Guadeloupe America/Marigot
984263bc
MD
2654
2655# Guatemala
bd7414aa
SW
2656#
2657# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen:
2658# Diario Co Latino, at
2659# http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079,
2660# says in an article dated 2006-04-19 that the Guatemalan government had
2661# decided on that date to advance official time by 60 minutes, to lessen the
2662# impact of the elevated cost of oil.... Daylight saving time will last from
2663# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified).
2664# From Paul Eggert (2006-06-22):
2665# The Ministry of Energy and Mines, press release CP-15/2006
2666# (2006-04-19), says DST ends at 24:00. See
2667# <http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf>.
2668
984263bc
MD
2669# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2670Rule Guat 1973 only - Nov 25 0:00 1:00 D
2671Rule Guat 1974 only - Feb 24 0:00 0 S
2672Rule Guat 1983 only - May 21 0:00 1:00 D
2673Rule Guat 1983 only - Sep 22 0:00 0 S
2674Rule Guat 1991 only - Mar 23 0:00 1:00 D
2675Rule Guat 1991 only - Sep 7 0:00 0 S
bd7414aa
SW
2676Rule Guat 2006 only - Apr 30 0:00 1:00 D
2677Rule Guat 2006 only - Oct 1 0:00 0 S
984263bc
MD
2678# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2679Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5
2680 -6:00 Guat C%sT
2681
2682# Haiti
bc95ec93
SW
2683# From Gwillim Law (2005-04-15):
2684# Risto O. Nykanen wrote me that Haiti is now on DST.
2685# I searched for confirmation, and I found a
2686# <a href="http://www.haitianconsulate.org/time.doc"> press release
2687# on the Web page of the Haitian Consulate in Chicago (2005-03-31),
2688# </a>. Translated from French, it says:
2689#
2690# "The Prime Minister's Communication Office notifies the public in general
2691# and the press in particular that, following a decision of the Interior
2692# Ministry and the Territorial Collectivities [I suppose that means the
2693# provinces], Haiti will move to Eastern Daylight Time in the night from next
2694# Saturday the 2nd to Sunday the 3rd.
2695#
2696# "Consequently, the Prime Minister's Communication Office wishes to inform
2697# the population that the country's clocks will be set forward one hour
2698# starting at midnight. This provision will hold until the last Saturday in
2699# October 2005.
2700#
2701# "Port-au-Prince, March 31, 2005"
bd7414aa
SW
2702#
2703# From Steffen Thorsen (2006-04-04):
2704# I have been informed by users that Haiti observes DST this year like
2705# last year, so the current "only" rule for 2005 might be changed to a
2706# "max" rule or to last until 2006. (Who knows if they will observe DST
2707# next year or if they will extend their DST like US/Canada next year).
2708#
2709# I have found this article about it (in French):
2710# http://www.haitipressnetwork.com/news.cfm?articleID=7612
2711#
2712# The reason seems to be an energy crisis.
2713
e1a4f1e4
SW
2714# From Stephen Colebourne (2007-02-22):
2715# Some IATA info: Haiti won't be having DST in 2007.
2716
bc95ec93 2717
984263bc
MD
2718# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2719Rule Haiti 1983 only - May 8 0:00 1:00 D
2720Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D
2721Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S
bd7414aa
SW
2722# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s.
2723# Go with IATA.
984263bc
MD
2724Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D
2725Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S
e1a4f1e4
SW
2726Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D
2727Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S
984263bc
MD
2728# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2729Zone America/Port-au-Prince -4:49:20 - LMT 1890
2730 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT
2731 -5:00 Haiti E%sT
2732
2733# Honduras
bd7414aa
SW
2734# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1.
2735
2736# From Paul Eggert (2006-05-05):
2737# worldtimezone.com reports a 2006-05-02 Spanish-language AP article
2738# saying Honduras will start using DST midnight Saturday, effective 4
2739# months until September. La Tribuna reported today
2740# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president
2741# of Honduras, refused to back down on this.
2742
2743# From Jesper Norgaard Welen (2006-08-08):
2744# It seems that Honduras has returned from DST to standard time this Monday at
2745# 00:00 hours (prolonging Sunday to 25 hours duration).
2746# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html
2747
2748# From Paul Eggert (2006-08-08):
2749# Also see Diario El Heraldo, The country returns to standard time (2006-08-08)
2750# <http://www.elheraldo.hn/nota.php?nid=54941&sec=12>.
2751# It mentions executive decree 18-2006.
2752
2753# From Steffen Thorsen (2006-08-17):
2754# Honduras will observe DST from 2007 to 2009, exact dates are not
2755# published, I have located this authoritative source:
2756# http://www.presidencia.gob.hn/noticia.aspx?nId=47
2757
f2892a6d
SW
2758# From Steffen Thorsen (2007-03-30):
2759# http://www.laprensahn.com/pais_nota.php?id04962=7386
2760# So it seems that Honduras will not enter DST this year....
2761
bd7414aa
SW
2762# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2763Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D
2764Rule Hond 1987 1988 - Sep lastSun 0:00 0 S
f2892a6d
SW
2765Rule Hond 2006 only - May Sun>=1 0:00 1:00 D
2766Rule Hond 2006 only - Aug Mon>=1 0:00 0 S
984263bc
MD
2767# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2768Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr
bd7414aa 2769 -6:00 Hond C%sT
984263bc
MD
2770#
2771# Great Swan I ceded by US to Honduras in 1972
2772
2773# Jamaica
2774
2775# From Bob Devine (1988-01-28):
2776# Follows US rules.
2777
2778# From U. S. Naval Observatory (1989-01-19):
2779# JAMAICA 5 H BEHIND UTC
2780
bd7414aa 2781# From Shanks & Pottenger:
984263bc
MD
2782# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2783Zone America/Jamaica -5:07:12 - LMT 1890 # Kingston
2784 -5:07:12 - KMT 1912 Feb # Kingston Mean Time
2785 -5:00 - EST 1974 Apr 28 2:00
2786 -5:00 US E%sT 1984
2787 -5:00 - EST
2788
2789# Martinique
2790# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2791Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France
2792 -4:04:20 - FFMT 1911 May # Fort-de-France MT
2793 -4:00 - AST 1980 Apr 6
2794 -4:00 1:00 ADT 1980 Sep 28
2795 -4:00 - AST
2796
2797# Montserrat
bd7414aa
SW
2798# From Paul Eggert (2006-03-22):
2799# In 1995 volcanic eruptions forced evacuation of Plymouth, the capital.
2800# world.gazetteer.com says Cork Hill is the most populous location now.
984263bc 2801# Zone NAME GMTOFF RULES FORMAT [UNTIL]
bd7414aa 2802Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Cork Hill
984263bc
MD
2803 -4:00 - AST
2804
2805# Nicaragua
2806#
bd7414aa 2807# This uses Shanks & Pottenger for times before 2005.
984263bc 2808#
bc95ec93
SW
2809# From Steffen Thorsen (2005-04-12):
2810# I've got reports from 8 different people that Nicaragua just started
2811# DST on Sunday 2005-04-10, in order to save energy because of
2812# expensive petroleum. The exact end date for DST is not yet
2813# announced, only "September" but some sites also say "mid-September".
2814# Some background information is available on the President's official site:
2815# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm
2816# The Decree, no 23-2005 is available here:
2817# 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
2818#
9ffe4b14 2819# From Paul Eggert (2005-05-01):
bc95ec93 2820# The decree doesn't say anything about daylight saving, but for now let's
bd7414aa 2821# assume that it is daylight saving....
9ffe4b14
SW
2822#
2823# From Gwillim Law (2005-04-21):
2824# The Associated Press story on the time change, which can be found at
2825# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html
2826# and elsewhere, says (fifth paragraph, translated from Spanish): "The last
2827# time that a change of clocks was applied to save energy was in the year 2000
2828# during the Arnoldo Aleman administration."...
2829# The northamerica file says that Nicaragua has been on UTC-6 continuously
2830# since December 1998. I wasn't able to find any details of Nicaraguan time
2831# changes in 2000. Perhaps a note could be added to the northamerica file, to
2832# the effect that we have indirect evidence that DST was observed in 2000.
bc95ec93 2833#
aa65d21a
SW
2834# From Jesper Norgaard Welen (2005-11-02):
2835# Nicaragua left DST the 2005-10-02 at 00:00 (local time).
2836# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm
2837# (2005-09-26)
2838#
bd7414aa
SW
2839# From Jesper Norgaard Welen (2006-05-05):
2840# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410
2841# (my informal translation)
2842# By order of the president of the republic, Enrique Bolanos, Nicaragua
2843# advanced by sixty minutes their official time, yesterday at 2 in the
2844# morning, and will stay that way until 30.th. of september.
2845#
17f48456
SW
2846# From Jesper Norgaard Welen (2006-09-30):
2847# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf
2848# My informal translation runs:
2849# The natural sun time is restored in all the national territory, in that the
2850# time is returned one hour at 01:00 am of October 1 of 2006.
2851#
984263bc
MD
2852# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2853Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D
2854Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S
bc95ec93 2855Rule Nic 2005 only - Apr 10 0:00 1:00 D
17f48456 2856Rule Nic 2005 only - Oct Sun>=1 0:00 0 S
bd7414aa 2857Rule Nic 2006 only - Apr 30 2:00 1:00 D
17f48456 2858Rule Nic 2006 only - Oct Sun>=1 1:00 0 S
984263bc
MD
2859# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2860Zone America/Managua -5:45:08 - LMT 1890
2861 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time?
2862 -6:00 - CST 1973 May
2863 -5:00 - EST 1975 Feb 16
bd7414aa
SW
2864 -6:00 Nic C%sT 1992 Jan 1 4:00
2865 -5:00 - EST 1992 Sep 24
2866 -6:00 - CST 1993
2867 -5:00 - EST 1997
bc95ec93 2868 -6:00 Nic C%sT
984263bc
MD
2869
2870# Panama
2871# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2872Zone America/Panama -5:18:08 - LMT 1890
2873 -5:19:36 - CMT 1908 Apr 22 # Colon Mean Time
2874 -5:00 - EST
2875
2876# Puerto Rico
2877# There are too many San Juans elsewhere, so we'll use `Puerto_Rico'.
2878# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2879Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan
2880 -4:00 - AST 1942 May 3
bd7414aa 2881 -4:00 US A%sT 1946
984263bc
MD
2882 -4:00 - AST
2883
2884# St Kitts-Nevis
2885# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2886Zone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre
2887 -4:00 - AST
2888
2889# St Lucia
2890# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2891Zone America/St_Lucia -4:04:00 - LMT 1890 # Castries
2892 -4:04:00 - CMT 1912 # Castries Mean Time
2893 -4:00 - AST
2894
2895# St Pierre and Miquelon
2896# There are too many St Pierres elsewhere, so we'll use `Miquelon'.
2897# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2898Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre
2899 -4:00 - AST 1980 May
ba5ba9da
JR
2900 -3:00 - PMST 1987 # Pierre & Miquelon Time
2901 -3:00 Canada PM%sT
984263bc
MD
2902
2903# St Vincent and the Grenadines
2904# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2905Zone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown
2906 -4:04:56 - KMT 1912 # Kingstown Mean Time
2907 -4:00 - AST
2908
2909# Turks and Caicos
e1a4f1e4
SW
2910#
2911# From Chris Dunn in
2912# <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007>
2913# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the
2914# daylight saving dates for time changes have been adjusted to match
2915# the recent U.S. change of dates.
2916#
2917# From Brian Inglis (2007-04-28):
2918# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26]
2919# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three
2920# rows before that there is an out of date entry for Oct:
2921# "Eastern Standard Times Begins 2007
2922# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time"
2923# indicating that the normal ET rules are followed.
2924#
2925# From Paul Eggert (2006-05-01):
bd7414aa 2926# Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998)
e1a4f1e4
SW
2927# says they switch at midnight. Go with Shanks & Pottenger.
2928#
984263bc 2929# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
e1a4f1e4
SW
2930Rule TC 1979 1986 - Apr lastSun 2:00 1:00 D
2931Rule TC 1979 2006 - Oct lastSun 2:00 0 S
2932Rule TC 1987 2006 - Apr Sun>=1 2:00 1:00 D
2933Rule TC 2007 max - Mar Sun>=8 2:00 1:00 D
2934Rule TC 2007 max - Nov Sun>=1 2:00 0 S
984263bc
MD
2935# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2936Zone America/Grand_Turk -4:44:32 - LMT 1890
2937 -5:07:12 - KMT 1912 Feb # Kingston Mean Time
2938 -5:00 TC E%sT
2939
2940# British Virgin Is
2941# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2942Zone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town
2943 -4:00 - AST
2944
2945# Virgin Is
2946# Zone NAME GMTOFF RULES FORMAT [UNTIL]
2947Zone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie
2948 -4:00 - AST