northamerica revision 8845:4be14673b9bf
1# 2# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3# 4# This code is free software; you can redistribute it and/or modify it 5# under the terms of the GNU General Public License version 2 only, as 6# published by the Free Software Foundation. Oracle designates this 7# particular file as subject to the "Classpath" exception as provided 8# by Oracle in the LICENSE file that accompanied this code. 9# 10# This code is distributed in the hope that it will be useful, but WITHOUT 11# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13# version 2 for more details (a copy is included in the LICENSE file that 14# accompanied this code). 15# 16# You should have received a copy of the GNU General Public License version 17# 2 along with this work; if not, write to the Free Software Foundation, 18# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19# 20# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21# or visit www.oracle.com if you need additional information or have any 22# questions. 23# 24# <pre> 25# This file is in the public domain, so clarified as of 26# 2009-05-17 by Arthur David Olson. 27 28# also includes Central America and the Caribbean 29 30# This data is by no means authoritative; if you think you know better, 31# go ahead and edit the file (and please send any changes to 32# tz@iana.org for general use in the future). 33 34# From Paul Eggert (1999-03-22): 35# A reliable and entertaining source about time zones is 36# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). 37 38############################################################################### 39 40# United States 41 42# From Paul Eggert (1999-03-31): 43# Howse writes (pp 121-125) that time zones were invented by 44# Professor Charles Ferdinand Dowd (1825-1904), 45# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). 46# His pamphlet "A System of National Time for Railroads" (1870) 47# was the result of his proposals at the Convention of Railroad Trunk Lines 48# in New York City (1869-10). His 1870 proposal was based on Washington, DC, 49# but in 1872-05 he moved the proposed origin to Greenwich. 50# His proposal was adopted by the railroads on 1883-11-18 at 12:00, 51# and the most of the country soon followed suit. 52 53# From Paul Eggert (2005-04-16): 54# That 1883 transition occurred at 12:00 new time, not at 12:00 old time. 55# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). 56 57# From Paul Eggert (2006-03-22): 58# A good source for time zone historical data in the US is 59# Thomas G. Shanks, The American Atlas (5th edition), 60# San Diego: ACS Publications, Inc. (1991). 61# Make sure you have the errata sheet; the book is somewhat useless without it. 62# It is the source for most of the pre-1991 US entries below. 63 64# From Paul Eggert (2001-03-06): 65# Daylight Saving Time was first suggested as a joke by Benjamin Franklin 66# in his whimsical essay "An Economical Project for Diminishing the Cost 67# of Light" published in the Journal de Paris (1784-04-26). 68# Not everyone is happy with the results: 69# 70# I don't really care how time is reckoned so long as there is some 71# agreement about it, but I object to being told that I am saving 72# daylight when my reason tells me that I am doing nothing of the kind. 73# I even object to the implication that I am wasting something 74# valuable if I stay in bed after the sun has risen. As an admirer 75# of moonlight I resent the bossy insistence of those who want to 76# reduce my time for enjoying it. At the back of the Daylight Saving 77# scheme I detect the bony, blue-fingered hand of Puritanism, eager 78# to push people into bed earlier, and get them up earlier, to make 79# them healthy, wealthy and wise in spite of themselves. 80# 81# -- Robertson Davies, The diary of Samuel Marchbanks, 82# Clarke, Irwin (1947), XIX, Sunday 83# 84# For more about the first ten years of DST in the United States, see 85# Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html"> 86# Ten years of daylight saving from the Pittsburgh standpoint 87# (Carnegie Library of Pittsburgh, 1927)</a>. 88# 89# Shanks says that DST was called "War Time" in the US in 1918 and 1919. 90# However, DST was imposed by the Standard Time Act of 1918, which 91# was the first nationwide legal time standard, and apparently 92# time was just called "Standard Time" or "Daylight Saving Time". 93 94# From Arthur David Olson: 95# US Daylight Saving Time ended on the last Sunday of *October* in 1974. 96# See, for example, the front page of the Saturday, 1974-10-26 97# and Sunday, 1974-10-27 editions of the Washington Post. 98 99# From Arthur David Olson: 100# Before the Uniform Time Act of 1966 took effect in 1967, observance of 101# Daylight Saving Time in the US was by local option, except during wartime. 102 103# From Arthur David Olson (2000-09-25): 104# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. 105# In the introduction, Oboler spoke of "Eastern Peace Time." 106# An AltaVista search turned up 107# <a href="http://rowayton.org/rhs/hstaug45.html">: 108# "When the time is announced over the radio now, it is 'Eastern Peace 109# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." 110# </a> (August 1945) by way of confirmation. 111 112# From Joseph Gallant citing 113# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): 114# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set 115# to switch to London for Attlee's address, but the American people 116# never got to hear his speech live. According to one press account, 117# CBS' Bob Trout was first to announce the word of Japan's surrender, 118# but a few seconds later, NBC, ABC and Mutual also flashed the word 119# of surrender, all of whom interrupting the bells of Big Ben in 120# London which were to precede Mr. Attlee's speech. 121 122# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From 123# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: 124# 125# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. 126# Any announcement from Asia would reach St. John's New York newsroom on a 127# wire service teletype machine, which had prescribed signals for major news. 128# Associated Press, for example, would ring five bells before spewing out 129# typed copy of an important story, and 10 bells for news "of transcendental 130# importance." 131# 132# On Aug. 14, stalling while talking steadily into the NBC networks' open 133# microphone, St. John heard five bells and waited only to hear a sixth bell, 134# before announcing confidently: "Ladies and gentlemen, World War II is over. 135# The Japanese have agreed to our surrender terms." 136# 137# He had scored a 20-second scoop on other broadcasters. 138 139# From Arthur David Olson (2005-08-22): 140# Paul has been careful to use the "US" rules only in those locations 141# that are part of the United States; this reflects the real scope of 142# U.S. government action. So even though the "US" rules have changed 143# in the latest release, other countries won't be affected. 144 145# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 146Rule US 1918 1919 - Mar lastSun 2:00 1:00 D 147Rule US 1918 1919 - Oct lastSun 2:00 0 S 148Rule US 1942 only - Feb 9 2:00 1:00 W # War 149Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace 150Rule US 1945 only - Sep 30 2:00 0 S 151Rule US 1967 2006 - Oct lastSun 2:00 0 S 152Rule US 1967 1973 - Apr lastSun 2:00 1:00 D 153Rule US 1974 only - Jan 6 2:00 1:00 D 154Rule US 1975 only - Feb 23 2:00 1:00 D 155Rule US 1976 1986 - Apr lastSun 2:00 1:00 D 156Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D 157Rule US 2007 max - Mar Sun>=8 2:00 1:00 D 158Rule US 2007 max - Nov Sun>=1 2:00 0 S 159 160# From Arthur David Olson, 2005-12-19 161# We generate the files specified below to guard against old files with 162# obsolete information being left in the time zone binary directory. 163# We limit the list to names that have appeared in previous versions of 164# this time zone package. 165# We do these as separate Zones rather than as Links to avoid problems if 166# a particular place changes whether it observes DST. 167# We put these specifications here in the northamerica file both to 168# increase the chances that they'll actually get compiled and to 169# avoid the need to duplicate the US rules in another file. 170 171# Zone NAME GMTOFF RULES FORMAT [UNTIL] 172Zone EST -5:00 - EST 173Zone MST -7:00 - MST 174Zone HST -10:00 - HST 175Zone EST5EDT -5:00 US E%sT 176Zone CST6CDT -6:00 US C%sT 177Zone MST7MDT -7:00 US M%sT 178Zone PST8PDT -8:00 US P%sT 179 180# From Bob Devine (1988-01-28): 181# ...Alaska (and Hawaii) had the timezone names changed in 1967. 182# old new 183# Pacific Standard Time(PST) -same- 184# Yukon Standard Time(YST) -same- 185# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) 186# Nome Standard Time (NT) Bering Standard Time (BST) 187# 188# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. 189# The YST zone now covers nearly all of the state, AHST just part 190# of the Aleutian islands. No DST. 191 192# From Paul Eggert (1995-12-19): 193# The tables below use 'NST', not 'NT', for Nome Standard Time. 194# I invented 'CAWT' for Central Alaska War Time. 195 196# From U. S. Naval Observatory (1989-01-19): 197# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON 198# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 199# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON 200# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 201# USA MOUNTAIN 7 H BEHIND UTC DENVER 202# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 203# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO 204# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 205# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) 206# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) 207# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W 208# USA - " - 9 H BEHIND UTC APR 3 - OCT 30 209# USA HAWAII 10 H BEHIND UTC 210# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY 211 212# From Arthur David Olson (1989-01-21): 213# The above dates are for 1988. 214# Note the "AKST" and "AKDT" abbreviations, the claim that there's 215# no DST in Samoa, and the claim that there is DST in Alaska and the 216# Aleutians. 217 218# From Arthur David Olson (1988-02-13): 219# Legal standard time zone names, from United States Code (1982 Edition and 220# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names 221# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 222# took effect), as explained in sections 263 and 261: 223# (none) 224# United States standard eastern time 225# United States standard mountain time 226# United States standard central time 227# United States standard Pacific time 228# (none) 229# United States standard Alaska time 230# (none) 231# Next, names from 1967-04-01 until 1983-11-30 (the date for 232# public law 98-181): 233# Atlantic standard time 234# eastern standard time 235# central standard time 236# mountain standard time 237# Pacific standard time 238# Yukon standard time 239# Alaska-Hawaii standard time 240# Bering standard time 241# And after 1983-11-30: 242# Atlantic standard time 243# eastern standard time 244# central standard time 245# mountain standard time 246# Pacific standard time 247# Alaska standard time 248# Hawaii-Aleutian standard time 249# Samoa standard time 250# The law doesn't give abbreviations. 251# 252# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: 253# Public law 106-564 (2000-12-23) introduced the abbreviation 254# "Chamorro Standard Time" for time in Guam and the Northern Marianas. 255# See the file "australasia". 256 257# From Arthur David Olson, 2005-08-09 258# The following was signed into law on 2005-08-08. 259# 260# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. 261# (a) Amendment- Section 3(a) of the Uniform Time Act of 1966 (15 262# U.S.C. 260a(a)) is amended-- 263# (1) by striking 'first Sunday of April' and inserting 'second 264# Sunday of March'; and 265# (2) by striking 'last Sunday of October' and inserting 'first 266# Sunday of November'. 267# (b) Effective Date- Subsection (a) shall take effect 1 year after the 268# date of enactment of this Act or March 1, 2007, whichever is later. 269# (c) Report to Congress- Not later than 9 months after the effective 270# date stated in subsection (b), the Secretary shall report to Congress 271# on the impact of this section on energy consumption in the United 272# States. 273# (d) Right to Revert- Congress retains the right to revert the 274# Daylight Saving Time back to the 2005 time schedules once the 275# Department study is complete. 276 277# US eastern time, represented by New York 278 279# Connecticut, Delaware, District of Columbia, most of Florida, 280# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky 281# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, 282# New Hampshire, New Jersey, New York, North Carolina, Ohio, 283# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 284# Vermont, Virginia, West Virginia 285 286# From Dave Cantor (2004-11-02): 287# Early this summer I had the occasion to visit the Mount Washington 288# Observatory weather station atop (of course!) Mount Washington [, NH].... 289# One of the staff members said that the station was on Eastern Standard Time 290# and didn't change their clocks for Daylight Saving ... so that their 291# reports will always have times which are 5 hours behind UTC. 292 293# From Paul Eggert (2005-08-26): 294# According to today's Huntsville Times 295# <http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1> 296# a few towns on Alabama's "eastern border with Georgia, such as Phenix City 297# in Russell County, Lanett in Chambers County and some towns in Lee County, 298# set their watches and clocks on Eastern time." It quotes H.H. "Bubba" 299# Roberts, city administrator in Phenix City. as saying "We are in the Central 300# time zone, but we do go by the Eastern time zone because so many people work 301# in Columbus." 302 303# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 304Rule NYC 1920 only - Mar lastSun 2:00 1:00 D 305Rule NYC 1920 only - Oct lastSun 2:00 0 S 306Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 307Rule NYC 1921 1954 - Sep lastSun 2:00 0 S 308Rule NYC 1955 1966 - Oct lastSun 2:00 0 S 309# Zone NAME GMTOFF RULES FORMAT [UNTIL] 310Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 311 -5:00 US E%sT 1920 312 -5:00 NYC E%sT 1942 313 -5:00 US E%sT 1946 314 -5:00 NYC E%sT 1967 315 -5:00 US E%sT 316 317# US central time, represented by Chicago 318 319# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, 320# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and 321# Washington counties), Illinois, western Indiana 322# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 323# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 324# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 325# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 326# western Tennessee, most of Texas, Wisconsin 327 328# From Larry M. Smith (2006-04-26) re Wisconsin: 329# http://www.legis.state.wi.us/statutes/Stat0175.pdf ... 330# is currently enforced at the 01:00 time of change. Because the local 331# "bar time" in the state corresponds to 02:00, a number of citations 332# are issued for the "sale of class 'B' alcohol after prohibited 333# hours" within the deviated hour of this change every year.... 334# 335# From Douglas R. Bomberg (2007-03-12): 336# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI 337# Statue 175 closer in synch with the US Congress' intent.... 338# http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf 339 340# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 341Rule Chicago 1920 only - Jun 13 2:00 1:00 D 342Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S 343Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D 344Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 345Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S 346Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S 347# Zone NAME GMTOFF RULES FORMAT [UNTIL] 348Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 349 -6:00 US C%sT 1920 350 -6:00 Chicago C%sT 1936 Mar 1 2:00 351 -5:00 - EST 1936 Nov 15 2:00 352 -6:00 Chicago C%sT 1942 353 -6:00 US C%sT 1946 354 -6:00 Chicago C%sT 1967 355 -6:00 US C%sT 356# Oliver County, ND switched from mountain to central time on 1992-10-25. 357Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 358 -7:00 US M%sT 1992 Oct 25 02:00 359 -6:00 US C%sT 360# Morton County, ND, switched from mountain to central time on 361# 2003-10-26, except for the area around Mandan which was already central time. 362# See <http://dmses.dot.gov/docimages/p63/135818.pdf>. 363# Officially this switch also included part of Sioux County, and 364# Jones, Mellette, and Todd Counties in South Dakota; 365# but in practice these other counties were already observing central time. 366# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. 367Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 368 -7:00 US M%sT 2003 Oct 26 02:00 369 -6:00 US C%sT 370 371# From Josh Findley (2011-01-21): 372# ...it appears that Mercer County, North Dakota, changed from the 373# mountain time zone to the central time zone at the last transition from 374# daylight-saving to standard time (on Nov. 7, 2010): 375# <a href="http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm"> 376# http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm 377# </a> 378# <a href="http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html"> 379# http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html 380# </a> 381 382# From Andy Lipscomb (2011-01-24): 383# ...according to the Census Bureau, the largest city is Beulah (although 384# it's commonly referred to as Beulah-Hazen, with Hazen being the next 385# largest city in Mercer County). Google Maps places Beulah's city hall 386# at 4715'51" north, 10146'40" west, which yields an offset of 6h47'07". 387 388Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53 389 -7:00 US M%sT 2010 Nov 7 2:00 390 -6:00 US C%sT 391 392# US mountain time, represented by Denver 393# 394# Colorado, far western Kansas, Montana, western 395# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 396# New Mexico, southwestern North Dakota, 397# western South Dakota, far western Texas (El Paso County, Hudspeth County, 398# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 399# 400# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 401Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 402Rule Denver 1920 only - Oct lastSun 2:00 0 S 403Rule Denver 1921 only - May 22 2:00 0 S 404Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 405Rule Denver 1965 1966 - Oct lastSun 2:00 0 S 406# Zone NAME GMTOFF RULES FORMAT [UNTIL] 407Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 408 -7:00 US M%sT 1920 409 -7:00 Denver M%sT 1942 410 -7:00 US M%sT 1946 411 -7:00 Denver M%sT 1967 412 -7:00 US M%sT 413 414# US Pacific time, represented by Los Angeles 415# 416# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 417# Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, 418# and the northern three-quarters of Idaho county), 419# most of Nevada, most of Oregon, and Washington 420# 421# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 422Rule CA 1948 only - Mar 14 2:00 1:00 D 423Rule CA 1949 only - Jan 1 2:00 0 S 424Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D 425Rule CA 1950 1961 - Sep lastSun 2:00 0 S 426Rule CA 1962 1966 - Oct lastSun 2:00 0 S 427# Zone NAME GMTOFF RULES FORMAT [UNTIL] 428Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 429 -8:00 US P%sT 1946 430 -8:00 CA P%sT 1967 431 -8:00 US P%sT 432 433# Alaska 434# AK%sT is the modern abbreviation for -9:00 per USNO. 435# 436# From Paul Eggert (2001-05-30): 437# Howse writes that Alaska switched from the Julian to the Gregorian calendar, 438# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 439# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 440# also a Friday. Include only the time zone part of this transition, 441# ignoring the switch from Julian to Gregorian, since we can't represent 442# the Julian calendar. 443# 444# As far as we know, none of the exact locations mentioned below were 445# permanently inhabited in 1867 by anyone using either calendar. 446# (Yakutat was colonized by the Russians in 1799, but the settlement 447# was destroyed in 1805 by a Yakutat-kon war party.) However, there 448# were nearby inhabitants in some cases and for our purposes perhaps 449# it's best to simply use the official transition. 450# 451 452# From Steve Ferguson (2011-01-31): 453# The author lives in Alaska and many of the references listed are only 454# available to Alaskan residents. 455# 456# <a href="http://www.alaskahistoricalsociety.org/index.cfm?section=discover%20alaska&page=Glimpses%20of%20the%20Past&viewpost=2&ContentId=98"> 457# http://www.alaskahistoricalsociety.org/index.cfm?section=discover%20alaska&page=Glimpses%20of%20the%20Past&viewpost=2&ContentId=98 458# </a> 459 460# From Arthur David Olson (2011-02-01): 461# Here's database-relevant material from the 2001 "Alaska History" article: 462# 463# On September 20 [1979]...DOT...officials decreed that on April 27, 464# 1980, Juneau and other nearby communities would move to Yukon Time. 465# Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on 466# Pacific Time. 467# 468# ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the 469# Department's September 1979 decision. Juneau and other communities in 470# northern Southeast reverted to Pacific Time on October 26. 471# 472# On October 28 [1983]...the Metlakatla Indian Community Council voted 473# unanimously to keep the reservation on Pacific Time. 474# 475# According to DOT official Joanne Petrie, Indian reservations are not 476# bound to follow time zones imposed by neighboring jurisdictions. 477# 478# (The last is consistent with how the database now handles the Navajo 479# Nation.) 480 481# From Arthur David Olson (2011-02-09): 482# I just spoke by phone with a staff member at the Metlakatla Indian 483# Community office (using contact information available at 484# <a href="http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla"> 485# http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla 486# </a>). 487# It's shortly after 1:00 here on the east coast of the United States; 488# the staffer said it was shortly after 10:00 there. When I asked whether 489# that meant they were on Pacific time, they said no--they were on their 490# own time. I asked about daylight saving; they said it wasn't used. I 491# did not inquire about practices in the past. 492 493# From Arthur David Olson (2011-08-17): 494# For lack of better information, assume that Metlakatla's 495# abandonment of use of daylight saving resulted from the 1983 vote. 496 497# Zone NAME GMTOFF RULES FORMAT [UNTIL] 498Zone America/Juneau 15:02:19 - LMT 1867 Oct 18 499 -8:57:41 - LMT 1900 Aug 20 12:00 500 -8:00 - PST 1942 501 -8:00 US P%sT 1946 502 -8:00 - PST 1969 503 -8:00 US P%sT 1980 Apr 27 2:00 504 -9:00 US Y%sT 1980 Oct 26 2:00 505 -8:00 US P%sT 1983 Oct 30 2:00 506 -9:00 US Y%sT 1983 Nov 30 507 -9:00 US AK%sT 508Zone America/Sitka 14:58:47 - LMT 1867 Oct 18 509 -9:01:13 - LMT 1900 Aug 20 12:00 510 -8:00 - PST 1942 511 -8:00 US P%sT 1946 512 -8:00 - PST 1969 513 -8:00 US P%sT 1983 Oct 30 2:00 514 -9:00 US Y%sT 1983 Nov 30 515 -9:00 US AK%sT 516Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 18 517 -8:46:18 - LMT 1900 Aug 20 12:00 518 -8:00 - PST 1942 519 -8:00 US P%sT 1946 520 -8:00 - PST 1969 521 -8:00 US P%sT 1983 Oct 30 2:00 522 -8:00 - MeST 523Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 524 -9:18:55 - LMT 1900 Aug 20 12:00 525 -9:00 - YST 1942 526 -9:00 US Y%sT 1946 527 -9:00 - YST 1969 528 -9:00 US Y%sT 1983 Nov 30 529 -9:00 US AK%sT 530Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18 531 -9:59:36 - LMT 1900 Aug 20 12:00 532 -10:00 - CAT 1942 533 -10:00 US CAT/CAWT 1945 Aug 14 23:00u 534 -10:00 US CAT/CAPT 1946 # Peace 535 -10:00 - CAT 1967 Apr 536 -10:00 - AHST 1969 537 -10:00 US AH%sT 1983 Oct 30 2:00 538 -9:00 US Y%sT 1983 Nov 30 539 -9:00 US AK%sT 540Zone America/Nome 12:58:21 - LMT 1867 Oct 18 541 -11:01:38 - LMT 1900 Aug 20 12:00 542 -11:00 - NST 1942 543 -11:00 US N%sT 1946 544 -11:00 - NST 1967 Apr 545 -11:00 - BST 1969 546 -11:00 US B%sT 1983 Oct 30 2:00 547 -9:00 US Y%sT 1983 Nov 30 548 -9:00 US AK%sT 549Zone America/Adak 12:13:21 - LMT 1867 Oct 18 550 -11:46:38 - LMT 1900 Aug 20 12:00 551 -11:00 - NST 1942 552 -11:00 US N%sT 1946 553 -11:00 - NST 1967 Apr 554 -11:00 - BST 1969 555 -11:00 US B%sT 1983 Oct 30 2:00 556 -10:00 US AH%sT 1983 Nov 30 557 -10:00 US HA%sT 558# The following switches don't quite make our 1970 cutoff. 559# 560# Shanks writes that part of southwest Alaska (e.g. Aniak) 561# switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 562# and another part (e.g. Akiak) made the same switch five weeks later. 563# 564# From David Flater (2004-11-09): 565# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 566# Historic Preservation Commission, provided this information, which 567# suggests that Unalaska deviated from statutory time from early 1967 568# possibly until 1983: 569# 570# Minutes of the Unalaska City Council Meeting, January 10, 1967: 571# "Except for St. Paul and Akutan, Unalaska is the only important 572# location not on Alaska Standard Time. The following resolution was 573# made by William Robinson and seconded by Henry Swanson: Be it 574# resolved that the City of Unalaska hereby goes to Alaska Standard 575# Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 576# January 14, Alaska Standard Time.) This resolution was passed with 577# three votes for and one against." 578 579# Hawaii 580 581# From Arthur David Olson (2010-12-09): 582# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 583# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, 584# the article is available at 585# <a href="http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf"> 586# http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf 587# </a> 588# and indicates that standard time was adopted effective noon, January 589# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight 590# saving for the period between the last Sunday of each April and the 591# last Sunday of each September, but less than a month later repealed the 592# act," (page 220), that year-round daylight saving time was in effect 593# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for 594# when clocks changed) and that clocks were changed by 30 minutes 595# effective the second Sunday of June, 1947 (page 219, with no time of 596# day given for when clocks changed). A footnote for the 1933 changes 597# cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) 598# and Act 163 (approved 21 May 1933)." 599 600# From Arthur David Olson (2011-01-19): 601# The following is from "Laws of the Territory of Hawaii Passed by the 602# Seventeenth Legislature: Regular Session 1933," available (as of 603# 2011-01-19) at American University's Pence Law Library. Page 85: "Act 604# 90...At 2 o'clock ante meridian of the last Sunday in April of each 605# year, the standard time of this Territory shall be advanced one 606# hour...This Act shall take effect upon its approval. Approved this 26th 607# day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of 608# Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is 609# hereby repealed...This Act shall take effect upon its approval, upon 610# which date the standard time of this Territory shall be restored to 611# that existing immediately prior to the taking effect of said Act 90. 612# Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor 613# of the Territory of Hawaii." 614# 615# Note that 1933-05-21 was a Sunday. 616# We're left to guess the time of day when Act 163 was approved; guess noon. 617 618Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 #Schmitt&Cox 619 -10:30 - HST 1933 Apr 30 2:00 #Laws 1933 620 -10:30 1:00 HDT 1933 May 21 12:00 #Laws 1933+12 621 -10:30 - HST 1942 Feb 09 2:00 #Schmitt&Cox+2 622 -10:30 1:00 HDT 1945 Sep 30 2:00 #Schmitt&Cox+2 623 -10:30 - HST 1947 Jun 8 2:00 #Schmitt&Cox+2 624 -10:00 - HST 625 626Link Pacific/Honolulu Pacific/Johnston 627 628# Now we turn to US areas that have diverged from the consensus since 1970. 629 630# Arizona mostly uses MST. 631 632# From Paul Eggert (2002-10-20): 633# 634# The information in the rest of this paragraph is derived from the 635# <a href="http://www.dlapr.lib.az.us/links/daylight.htm"> 636# Daylight Saving Time web page (2002-01-23)</a> maintained by the 637# Arizona State Library, Archives and Public Records. 638# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 639# time, but by federal law railroads, airlines, bus lines, military 640# personnel, and some engaged in interstate commerce continued to 641# observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 642# Gazette says that was the date the law changed, and that 04-01 was 643# the date the state's clocks would change. In 1945 the State of 644# Arizona used standard time all year, again with exceptions only as 645# mandated by federal law. Arizona observed DST in 1967, but Arizona 646# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 647# 648# Shanks says the 1944 experiment came to an end on 1944-03-17. 649# Go with the Arizona State Library instead. 650 651Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 652 -7:00 US M%sT 1944 Jan 1 00:01 653 -7:00 - MST 1944 Apr 1 00:01 654 -7:00 US M%sT 1944 Oct 1 00:01 655 -7:00 - MST 1967 656 -7:00 US M%sT 1968 Mar 21 657 -7:00 - MST 658# From Arthur David Olson (1988-02-13): 659# A writer from the Inter Tribal Council of Arizona, Inc., 660# notes in private correspondence dated 1987-12-28 that "Presently, only the 661# Navajo Nation participates in the Daylight Saving Time policy, due to its 662# large size and location in three states." (The "only" means that other 663# tribal nations don't use DST.) 664# 665# From Paul Eggert (2013-08-26): 666# See America/Denver for a zone appropriate for the Navajo Nation. 667 668# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 669# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 670# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 671# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 672# Teton, Twin Falls, Valley, Washington counties, and the southern 673# quarter of Idaho county) and eastern Oregon (most of Malheur County) 674# switched four weeks late in 1974. 675# 676# Zone NAME GMTOFF RULES FORMAT [UNTIL] 677Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 678 -8:00 US P%sT 1923 May 13 2:00 679 -7:00 US M%sT 1974 680 -7:00 - MST 1974 Feb 3 2:00 681 -7:00 US M%sT 682 683# Indiana 684# 685# For a map of Indiana's time zone regions, see: 686# <a href="http://www.mccsc.edu/time.html"> 687# What time is it in Indiana? 688# </a> (2006-03-01) 689# 690# From Paul Eggert (2007-08-17): 691# Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 692# with the following exceptions: 693# 694# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 695# Vandenburgh, and Warrick counties have been like America/Chicago. 696# 697# - Dearborn and Ohio counties have been like America/New_York. 698# 699# - Clark, Floyd, and Harrison counties have been like 700# America/Kentucky/Louisville. 701# 702# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, 703# and Switzerland counties have their own time zone histories as noted below. 704# 705# Shanks partitioned Indiana into 345 regions, each with its own time history, 706# and wrote "Even newspaper reports present contradictory information." 707# Those Hoosiers! Such a flighty and changeable people! 708# Fortunately, most of the complexity occurred before our cutoff date of 1970. 709# 710# Other than Indianapolis, the Indiana place names are so nondescript 711# that they would be ambiguous if we left them at the 'America' level. 712# So we reluctantly put them all in a subdirectory 'America/Indiana'. 713 714# From Paul Eggert (2005-08-16): 715# http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006. 716 717# From Nathan Stratton Treadway (2006-03-30): 718# http://www.dot.gov/affairs/dot0406.htm [3705 B] 719# From Deborah Goldsmith (2006-01-18): 720# http://dmses.dot.gov/docimages/pdf95/382329_web.pdf [2.9 MB] 721# From Paul Eggert (2006-01-20): 722# It says "DOT is relocating the time zone boundary in Indiana to move Starke, 723# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 724# Eastern Time Zone to the Central Time Zone.... The effective date of 725# this rule is 2:OO a.m. EST Sunday, April 2, 2006, which is the 726# changeover date from standard time to Daylight Saving Time." 727# Strictly speaking, this means the affected counties will change their 728# clocks twice that night, but this obviously is in error. The intent 729# is that 01:59:59 EST be followed by 02:00:00 CDT. 730 731# From Gwillim Law (2007-02-10): 732# The Associated Press has been reporting that Pulaski County, Indiana is 733# going to switch from Central to Eastern Time on March 11, 2007.... 734# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 735 736# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 737Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D 738Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 739Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 740# Zone NAME GMTOFF RULES FORMAT [UNTIL] 741Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 742 -6:00 US C%sT 1920 743 -6:00 Indianapolis C%sT 1942 744 -6:00 US C%sT 1946 745 -6:00 Indianapolis C%sT 1955 Apr 24 2:00 746 -5:00 - EST 1957 Sep 29 2:00 747 -6:00 - CST 1958 Apr 27 2:00 748 -5:00 - EST 1969 749 -5:00 US E%sT 1971 750 -5:00 - EST 2006 751 -5:00 US E%sT 752# 753# Eastern Crawford County, Indiana, left its clocks alone in 1974, 754# as well as from 1976 through 2005. 755# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 756Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D 757Rule Marengo 1951 only - Sep lastSun 2:00 0 S 758Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 759Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S 760# Zone NAME GMTOFF RULES FORMAT [UNTIL] 761Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 762 -6:00 US C%sT 1951 763 -6:00 Marengo C%sT 1961 Apr 30 2:00 764 -5:00 - EST 1969 765 -5:00 US E%sT 1974 Jan 6 2:00 766 -6:00 1:00 CDT 1974 Oct 27 2:00 767 -5:00 US E%sT 1976 768 -5:00 - EST 2006 769 -5:00 US E%sT 770# 771# Daviess, Dubois, Knox, and Martin Counties, Indiana, 772# switched from eastern to central time in April 2006, then switched back 773# in November 2007. 774# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 775Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 776Rule Vincennes 1946 only - Sep lastSun 2:00 0 S 777Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 778Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 779Rule Vincennes 1955 only - May 1 0:00 1:00 D 780Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 781Rule Vincennes 1960 only - Oct lastSun 2:00 0 S 782Rule Vincennes 1961 only - Sep lastSun 2:00 0 S 783Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 784# Zone NAME GMTOFF RULES FORMAT [UNTIL] 785Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 786 -6:00 US C%sT 1946 787 -6:00 Vincennes C%sT 1964 Apr 26 2:00 788 -5:00 - EST 1969 789 -5:00 US E%sT 1971 790 -5:00 - EST 2006 Apr 2 2:00 791 -6:00 US C%sT 2007 Nov 4 2:00 792 -5:00 US E%sT 793# 794# Perry County, Indiana, switched from eastern to central time in April 2006. 795# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 796Rule Perry 1946 only - Apr lastSun 2:00 1:00 D 797Rule Perry 1946 only - Sep lastSun 2:00 0 S 798Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D 799Rule Perry 1953 1959 - Sep lastSun 2:00 0 S 800Rule Perry 1955 only - May 1 0:00 1:00 D 801Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D 802Rule Perry 1960 only - Oct lastSun 2:00 0 S 803Rule Perry 1961 only - Sep lastSun 2:00 0 S 804Rule Perry 1962 1963 - Oct lastSun 2:00 0 S 805# Zone NAME GMTOFF RULES FORMAT [UNTIL] 806Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 807 -6:00 US C%sT 1946 808 -6:00 Perry C%sT 1964 Apr 26 2:00 809 -5:00 - EST 1969 810 -5:00 US E%sT 1971 811 -5:00 - EST 2006 Apr 2 2:00 812 -6:00 US C%sT 813# 814# Pike County, Indiana moved from central to eastern time in 1977, 815# then switched back in 2006, then switched back again in 2007. 816# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 817Rule Pike 1955 only - May 1 0:00 1:00 D 818Rule Pike 1955 1960 - Sep lastSun 2:00 0 S 819Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 820Rule Pike 1961 1964 - Oct lastSun 2:00 0 S 821# Zone NAME GMTOFF RULES FORMAT [UNTIL] 822Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 823 -6:00 US C%sT 1955 824 -6:00 Pike C%sT 1965 Apr 25 2:00 825 -5:00 - EST 1966 Oct 30 2:00 826 -6:00 US C%sT 1977 Oct 30 2:00 827 -5:00 - EST 2006 Apr 2 2:00 828 -6:00 US C%sT 2007 Nov 4 2:00 829 -5:00 US E%sT 830# 831# Starke County, Indiana moved from central to eastern time in 1991, 832# then switched back in 2006. 833# From Arthur David Olson (1991-10-28): 834# An article on page A3 of the Sunday, 1991-10-27 Washington Post 835# notes that Starke County switched from Central time to Eastern time as of 836# 1991-10-27. 837# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 838Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 839Rule Starke 1947 1954 - Sep lastSun 2:00 0 S 840Rule Starke 1955 1956 - Oct lastSun 2:00 0 S 841Rule Starke 1957 1958 - Sep lastSun 2:00 0 S 842Rule Starke 1959 1961 - Oct lastSun 2:00 0 S 843# Zone NAME GMTOFF RULES FORMAT [UNTIL] 844Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 845 -6:00 US C%sT 1947 846 -6:00 Starke C%sT 1962 Apr 29 2:00 847 -5:00 - EST 1963 Oct 27 2:00 848 -6:00 US C%sT 1991 Oct 27 2:00 849 -5:00 - EST 2006 Apr 2 2:00 850 -6:00 US C%sT 851# 852# Pulaski County, Indiana, switched from eastern to central time in 853# April 2006 and then switched back in March 2007. 854# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 855Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 856Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 857Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 858Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 859# Zone NAME GMTOFF RULES FORMAT [UNTIL] 860Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 861 -6:00 US C%sT 1946 862 -6:00 Pulaski C%sT 1961 Apr 30 2:00 863 -5:00 - EST 1969 864 -5:00 US E%sT 1971 865 -5:00 - EST 2006 Apr 2 2:00 866 -6:00 US C%sT 2007 Mar 11 2:00 867 -5:00 US E%sT 868# 869# Switzerland County, Indiana, did not observe DST from 1973 through 2005. 870# Zone NAME GMTOFF RULES FORMAT [UNTIL] 871Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 872 -6:00 US C%sT 1954 Apr 25 2:00 873 -5:00 - EST 1969 874 -5:00 US E%sT 1973 875 -5:00 - EST 2006 876 -5:00 US E%sT 877 878# Part of Kentucky left its clocks alone in 1974. 879# This also includes Clark, Floyd, and Harrison counties in Indiana. 880# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 881Rule Louisville 1921 only - May 1 2:00 1:00 D 882Rule Louisville 1921 only - Sep 1 2:00 0 S 883Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 884Rule Louisville 1941 only - Sep lastSun 2:00 0 S 885Rule Louisville 1946 only - Jun 2 2:00 0 S 886Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S 887Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S 888# Zone NAME GMTOFF RULES FORMAT [UNTIL] 889Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 890 -6:00 US C%sT 1921 891 -6:00 Louisville C%sT 1942 892 -6:00 US C%sT 1946 893 -6:00 Louisville C%sT 1961 Jul 23 2:00 894 -5:00 - EST 1968 895 -5:00 US E%sT 1974 Jan 6 2:00 896 -6:00 1:00 CDT 1974 Oct 27 2:00 897 -5:00 US E%sT 898# 899# Wayne County, Kentucky 900# 901# From 902# <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml"> 903# Lake Cumberland LIFE 904# </a> (1999-01-29) via WKYM-101.7: 905# Clinton County has joined Wayne County in asking the DoT to change from 906# the Central to the Eastern time zone.... The Wayne County government made 907# the same request in December. And while Russell County officials have not 908# taken action, the majority of respondents to a poll conducted there in 909# August indicated they would like to change to "fast time" also. 910# The three Lake Cumberland counties are the farthest east of any U.S. 911# location in the Central time zone. 912# 913# From Rich Wales (2000-08-29): 914# After prolonged debate, and despite continuing deep differences of opinion, 915# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 916# (-0500) time. They won't "fall back" this year. See Sara Shipley, 917# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 918# 919# From Paul Eggert (2001-07-16): 920# The final rule was published in the 921# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22"> 922# Federal Register 65, 160 (2000-08-17), page 50154-50158. 923# </a> 924# 925Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 926 -6:00 US C%sT 1946 927 -6:00 - CST 1968 928 -6:00 US C%sT 2000 Oct 29 2:00 929 -5:00 US E%sT 930 931 932# From Rives McDow (2000-08-30): 933# Here ... are all the changes in the US since 1985. 934# Kearny County, KS (put all of county on central; 935# previously split between MST and CST) ... 1990-10 936# Starke County, IN (from CST to EST) ... 1991-10 937# Oliver County, ND (from MST to CST) ... 1992-10 938# West Wendover, NV (from PST TO MST) ... 1999-10 939# Wayne County, KY (from CST to EST) ... 2000-10 940# 941# From Paul Eggert (2001-07-17): 942# We don't know where the line used to be within Kearny County, KS, 943# so omit that change for now. 944# See America/Indiana/Knox for the Starke County, IN change. 945# See America/North_Dakota/Center for the Oliver County, ND change. 946# West Wendover, NV officially switched from Pacific to mountain time on 947# 1999-10-31. See the 948# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15"> 949# Federal Register 64, 203 (1999-10-21), page 56705-56707. 950# </a> 951# However, the Federal Register says that West Wendover already operated 952# on mountain time, and the rule merely made this official; 953# hence a separate tz entry is not needed. 954 955# Michigan 956# 957# From Bob Devine (1988-01-28): 958# Michigan didn't observe DST from 1968 to 1973. 959# 960# From Paul Eggert (1999-03-31): 961# Shanks writes that Michigan started using standard time on 1885-09-18, 962# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 963# that Detroit kept 964# 965# local time until 1900 when the City Council decreed that clocks should 966# be put back twenty-eight minutes to Central Standard Time. Half the 967# city obeyed, half refused. After considerable debate, the decision 968# was rescinded and the city reverted to Sun time. A derisive offer to 969# erect a sundial in front of the city hall was referred to the 970# Committee on Sewers. Then, in 1905, Central time was adopted 971# by city vote. 972# 973# This story is too entertaining to be false, so go with Howse over Shanks. 974# 975# From Paul Eggert (2001-03-06): 976# Garland (1927) writes "Cleveland and Detroit advanced their clocks 977# one hour in 1914." This change is not in Shanks. We have no more 978# info, so omit this for now. 979# 980# Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 981# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 982Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D 983Rule Detroit 1948 only - Sep lastSun 2:00 0 S 984Rule Detroit 1967 only - Jun 14 2:00 1:00 D 985Rule Detroit 1967 only - Oct lastSun 2:00 0 S 986# Zone NAME GMTOFF RULES FORMAT [UNTIL] 987Zone America/Detroit -5:32:11 - LMT 1905 988 -6:00 - CST 1915 May 15 2:00 989 -5:00 - EST 1942 990 -5:00 US E%sT 1946 991 -5:00 Detroit E%sT 1973 992 -5:00 US E%sT 1975 993 -5:00 - EST 1975 Apr 27 2:00 994 -5:00 US E%sT 995# 996# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 997# switched from EST to CST/CDT in 1973. 998# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 999Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D 1000Rule Menominee 1946 only - Sep lastSun 2:00 0 S 1001Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D 1002Rule Menominee 1966 only - Oct lastSun 2:00 0 S 1003# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1004Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 1005 -6:00 US C%sT 1946 1006 -6:00 Menominee C%sT 1969 Apr 27 2:00 1007 -5:00 - EST 1973 Apr 29 2:00 1008 -6:00 US C%sT 1009 1010# Navassa 1011# administered by the US Fish and Wildlife Service 1012# claimed by US under the provisions of the 1856 Guano Islands Act 1013# also claimed by Haiti 1014# occupied 1857/1900 by the Navassa Phosphate Co 1015# US lighthouse 1917/1996-09 1016# currently uninhabited 1017# see Mark Fineman, "An Isle Rich in Guano and Discord", 1018# _Los Angeles Times_ (1998-11-10), A1, A10; it cites 1019# Jimmy Skaggs, _The Great Guano Rush_ (1994). 1020 1021################################################################################ 1022 1023 1024# From Paul Eggert (2006-03-22): 1025# A good source for time zone historical data outside the U.S. is 1026# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 1027# San Diego: ACS Publications, Inc. (2003). 1028# 1029# Gwillim Law writes that a good source 1030# for recent time zone data is the International Air Transport 1031# Association's Standard Schedules Information Manual (IATA SSIM), 1032# published semiannually. Law sent in several helpful summaries 1033# of the IATA's data after 1990. 1034# 1035# Except where otherwise noted, Shanks & Pottenger is the source for 1036# entries through 1990, and IATA SSIM is the source for entries afterwards. 1037# 1038# Other sources occasionally used include: 1039# 1040# Edward W. Whitman, World Time Differences, 1041# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 1042# which I found in the UCLA library. 1043# 1044# <a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf"> 1045# William Willett, The Waste of Daylight, 19th edition 1046# </a> (1914-03) 1047# 1048# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 1049# <http://www.jstor.org/stable/1774359>. 1050# 1051# See the 'europe' file for Greenland. 1052 1053# Canada 1054 1055# From Alain LaBont<e'> (1994-11-14): 1056# I post here the time zone abbreviations standardized in Canada 1057# for both English and French in the CAN/CSA-Z234.4-89 standard.... 1058# 1059# UTC Standard time Daylight savings time 1060# offset French English French English 1061# -2:30 - - HAT NDT 1062# -3 - - HAA ADT 1063# -3:30 HNT NST - - 1064# -4 HNA AST HAE EDT 1065# -5 HNE EST HAC CDT 1066# -6 HNC CST HAR MDT 1067# -7 HNR MST HAP PDT 1068# -8 HNP PST HAY YDT 1069# -9 HNY YST - - 1070# 1071# HN: Heure Normale ST: Standard Time 1072# HA: Heure Avanc<e'>e DT: Daylight saving Time 1073# 1074# A: de l'Atlantique Atlantic 1075# C: du Centre Central 1076# E: de l'Est Eastern 1077# M: Mountain 1078# N: Newfoundland 1079# P: du Pacifique Pacific 1080# R: des Rocheuses 1081# T: de Terre-Neuve 1082# Y: du Yukon Yukon 1083# 1084# From Paul Eggert (1994-11-22): 1085# Alas, this sort of thing must be handled by localization software. 1086 1087# Unless otherwise specified, the data for Canada are all from Shanks 1088# & Pottenger. 1089 1090# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 1091# 2007-03-01): 1092# The British Columbia government announced yesterday that it will 1093# adjust daylight savings next year to align with changes in the 1094# U.S. and the rest of Canada.... 1095# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm 1096# ... 1097# Nova Scotia 1098# Daylight saving time will be extended by four weeks starting in 2007.... 1099# http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf 1100# 1101# [For New Brunswick] the new legislation dictates that the time change is to 1102# be done at 02:00 instead of 00:01. 1103# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 1104# ... 1105# Manitoba has traditionally changed the clock every fall at 03:00. 1106# As of 2006, the transition is to take place one hour earlier at 02:00. 1107# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 1108# ... 1109# [Alberta, Ontario, Quebec] will follow US rules. 1110# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 1111# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 1112# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 1113# ... 1114# P.E.I. will follow US rules.... 1115# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 1116# ... 1117# Province of Newfoundland and Labrador.... 1118# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 1119# ... 1120# Yukon 1121# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 1122# ... 1123# N.W.T. will follow US rules. Whoever maintains the government web site 1124# does not seem to believe in bookmarks. To see the news release, click the 1125# following link and search for "Daylight Savings Time Change". Press the 1126# "Daylight Savings Time Change" link; it will fire off a popup using 1127# JavaScript. 1128# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 1129# ... 1130# Nunavut 1131# An amendment to the Interpretation Act was registered on February 19/2007.... 1132# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 1133 1134# From Paul Eggert (2006-04-25): 1135# H. David Matthews and Mary Vincent's map 1136# <a href="http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp"> 1137# "It's about TIME", _Canadian Geographic_ (September-October 1998) 1138# </a> contains detailed boundaries for regions observing nonstandard 1139# time and daylight saving time arrangements in Canada circa 1998. 1140# 1141# INMS, the Institute for National Measurement Standards in Ottawa, has <a 1142# href="http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php"> 1143# information about standard and daylight saving time zones in Canada. 1144# </a> (updated periodically). 1145# Its unofficial information is often taken from Matthews and Vincent. 1146 1147# From Paul Eggert (2006-06-27): 1148# For now, assume all of DST-observing Canada will fall into line with the 1149# new US DST rules, 1150 1151# From Chris Walton (2011-12-01) 1152# In the first of Tammy Hardwick's articles 1153# <a href="http://www.ilovecreston.com/?p=articles&t=spec&ar=260"> 1154# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1155# </a> 1156# she quotes the Friday November 1/1918 edition of the Creston Review. 1157# The quote includes these two statements: 1158# 'Sunday the CPR went back to the old system of time...' 1159# '... The daylight saving scheme was dropped all over Canada at the same time,' 1160# These statements refer to a transition from daylight time to standard time 1161# that occurred nationally on Sunday October 27/1918. This transition was 1162# also documented in the Saturday October 26/1918 edition of the Toronto Star. 1163 1164# In light of that evidence, we alter the date from the earlier believed 1165# Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day 1166# than Thursday) in all Canadian rulesets. 1167 1168# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1169Rule Canada 1918 only - Apr 14 2:00 1:00 D 1170Rule Canada 1918 only - Oct 27 2:00 0 S 1171Rule Canada 1942 only - Feb 9 2:00 1:00 W # War 1172Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 1173Rule Canada 1945 only - Sep 30 2:00 0 S 1174Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 1175Rule Canada 1974 2006 - Oct lastSun 2:00 0 S 1176Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 1177Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 1178Rule Canada 2007 max - Nov Sun>=1 2:00 0 S 1179 1180 1181# Newfoundland and Labrador 1182 1183# From Paul Eggert (2000-10-02): 1184# Matthews and Vincent (1998) write that Labrador should use NST/NDT, 1185# but the only part of Labrador that follows the rules is the 1186# southeast corner, including Port Hope Simpson and Mary's Harbour, 1187# but excluding, say, Black Tickle. 1188 1189# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1190Rule StJohns 1917 only - Apr 8 2:00 1:00 D 1191Rule StJohns 1917 only - Sep 17 2:00 0 S 1192# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 1193Rule StJohns 1919 only - May 5 23:00 1:00 D 1194Rule StJohns 1919 only - Aug 12 23:00 0 S 1195# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 1196Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 1197Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S 1198# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 1199# Pottenger. 1200Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 1201Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 1202# Whitman gives the following transitions: 1203# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 1204# but go with Shanks & Pottenger and assume they used Canadian rules. 1205# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 1206# Apr 30 - Sep 24; go with Shanks & Pottenger. 1207Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 1208Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 1209Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 1210Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S 1211Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S 1212# From Paul Eggert (2000-10-02): 1213# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 1214# at 00:01 local time. For now, assume it started in 1987. 1215 1216# From Michael Pelley (2011-09-12): 1217# We received today, Monday, September 12, 2011, notification that the 1218# changes to the Newfoundland Standard Time Act have been proclaimed. 1219# The change in the Act stipulates that the change from Daylight Savings 1220# Time to Standard Time and from Standard Time to Daylight Savings Time 1221# now occurs at 2:00AM. 1222# ... 1223# <a href="http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm"> 1224# http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm 1225# </a> 1226# ... 1227# MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery 1228# Office of the Chief Information Officer 1229# Executive Council 1230# Government of Newfoundland & Labrador 1231 1232Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 1233Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S 1234Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 1235Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1236Rule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D 1237Rule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S 1238# 1239# St John's has an apostrophe, but Posix file names can't have apostrophes. 1240# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1241Zone America/St_Johns -3:30:52 - LMT 1884 1242 -3:30:52 StJohns N%sT 1918 1243 -3:30:52 Canada N%sT 1919 1244 -3:30:52 StJohns N%sT 1935 Mar 30 1245 -3:30 StJohns N%sT 1942 May 11 1246 -3:30 Canada N%sT 1946 1247 -3:30 StJohns N%sT 2011 Nov 1248 -3:30 Canada N%sT 1249 1250# most of east Labrador 1251 1252# The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'. 1253# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1254Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 1255 -3:30:52 - NST 1918 1256 -3:30:52 Canada N%sT 1919 1257 -3:30:52 - NST 1935 Mar 30 1258 -3:30 - NST 1936 1259 -3:30 StJohns N%sT 1942 May 11 1260 -3:30 Canada N%sT 1946 1261 -3:30 StJohns N%sT 1966 Mar 15 2:00 1262 -4:00 StJohns A%sT 2011 Nov 1263 -4:00 Canada A%sT 1264 1265 1266# west Labrador, Nova Scotia, Prince Edward I 1267 1268# From Paul Eggert (2006-03-22): 1269# Shanks & Pottenger write that since 1970 most of this region has been like 1270# Halifax. Many locales did not observe peacetime DST until 1972; 1271# Glace Bay, NS is the largest that we know of. 1272# Shanks & Pottenger also write that Liverpool, NS was the only town 1273# in Canada to observe DST in 1971 but not 1970; for now we'll assume 1274# this is a typo. 1275 1276# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1277Rule Halifax 1916 only - Apr 1 0:00 1:00 D 1278Rule Halifax 1916 only - Oct 1 0:00 0 S 1279Rule Halifax 1920 only - May 9 0:00 1:00 D 1280Rule Halifax 1920 only - Aug 29 0:00 0 S 1281Rule Halifax 1921 only - May 6 0:00 1:00 D 1282Rule Halifax 1921 1922 - Sep 5 0:00 0 S 1283Rule Halifax 1922 only - Apr 30 0:00 1:00 D 1284Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1285Rule Halifax 1923 only - Sep 4 0:00 0 S 1286Rule Halifax 1924 only - Sep 15 0:00 0 S 1287Rule Halifax 1925 only - Sep 28 0:00 0 S 1288Rule Halifax 1926 only - May 16 0:00 1:00 D 1289Rule Halifax 1926 only - Sep 13 0:00 0 S 1290Rule Halifax 1927 only - May 1 0:00 1:00 D 1291Rule Halifax 1927 only - Sep 26 0:00 0 S 1292Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1293Rule Halifax 1928 only - Sep 9 0:00 0 S 1294Rule Halifax 1929 only - Sep 3 0:00 0 S 1295Rule Halifax 1930 only - Sep 15 0:00 0 S 1296Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1297Rule Halifax 1932 only - May 1 0:00 1:00 D 1298Rule Halifax 1933 only - Apr 30 0:00 1:00 D 1299Rule Halifax 1933 only - Oct 2 0:00 0 S 1300Rule Halifax 1934 only - May 20 0:00 1:00 D 1301Rule Halifax 1934 only - Sep 16 0:00 0 S 1302Rule Halifax 1935 only - Jun 2 0:00 1:00 D 1303Rule Halifax 1935 only - Sep 30 0:00 0 S 1304Rule Halifax 1936 only - Jun 1 0:00 1:00 D 1305Rule Halifax 1936 only - Sep 14 0:00 0 S 1306Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1307Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1308Rule Halifax 1939 only - May 28 0:00 1:00 D 1309Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1310Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1311Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1312Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1313Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1314Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1315Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1316Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1317Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S 1318# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1319Zone America/Halifax -4:14:24 - LMT 1902 Jun 15 1320 -4:00 Halifax A%sT 1918 1321 -4:00 Canada A%sT 1919 1322 -4:00 Halifax A%sT 1942 Feb 9 2:00s 1323 -4:00 Canada A%sT 1946 1324 -4:00 Halifax A%sT 1974 1325 -4:00 Canada A%sT 1326Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 1327 -4:00 Canada A%sT 1953 1328 -4:00 Halifax A%sT 1954 1329 -4:00 - AST 1972 1330 -4:00 Halifax A%sT 1974 1331 -4:00 Canada A%sT 1332 1333# New Brunswick 1334 1335# From Paul Eggert (2007-01-31): 1336# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 1337# says they changed at 00:01 through 2006, and 1338# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1339# clear that this was the case since at least 1993. 1340# For now, assume it started in 1993. 1341 1342# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1343Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1344Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1345Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1346Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1347Rule Moncton 1939 only - May 27 1:00 1:00 D 1348Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1349Rule Moncton 1940 only - May 19 1:00 1:00 D 1350Rule Moncton 1941 only - May 4 1:00 1:00 D 1351Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1352Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1353Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1354Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1355Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1356# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1357Zone America/Moncton -4:19:08 - LMT 1883 Dec 9 1358 -5:00 - EST 1902 Jun 15 1359 -4:00 Canada A%sT 1933 1360 -4:00 Moncton A%sT 1942 1361 -4:00 Canada A%sT 1946 1362 -4:00 Moncton A%sT 1973 1363 -4:00 Canada A%sT 1993 1364 -4:00 Moncton A%sT 2007 1365 -4:00 Canada A%sT 1366 1367# Quebec 1368 1369# From Paul Eggert (2013-08-30): 1370# Since 1970 most of Quebec has been like Toronto. 1371# However, because earlier versions of the tz database mistakenly relied on data 1372# from Shanks & Pottenger saying that Quebec differed from Ontario after 1970, 1373# a separate entry was created for most of Quebec. We're loath to lose 1374# its pre-1970 info, even though the tz database is normally limited to 1375# zones that differ after 1970, so keep this otherwise out-of-scope entry. 1376 1377# Matthews and Vincent (1998) also write that Quebec east of the -63 1378# meridian is supposed to observe AST, but residents as far east as 1379# Natashquan use EST/EDT, and residents east of Natashquan use AST. 1380# The Quebec department of justice writes in 1381# "The situation in Minganie and Basse-Cote-Nord" 1382# http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm 1383# that the coastal strip from just east of Natashquan to Blanc-Sablon 1384# observes Atlantic standard time all year round. 1385# http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en 1386# says this common practice was codified into law as of 2007. 1387# For lack of better info, guess this practice began around 1970, contra to 1388# Shanks & Pottenger who have this region observing AST/ADT. 1389# for post-1970 data America/Puerto_Rico. 1390 1391# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1392Rule Mont 1917 only - Mar 25 2:00 1:00 D 1393Rule Mont 1917 only - Apr 24 0:00 0 S 1394Rule Mont 1919 only - Mar 31 2:30 1:00 D 1395Rule Mont 1919 only - Oct 25 2:30 0 S 1396Rule Mont 1920 only - May 2 2:30 1:00 D 1397Rule Mont 1920 1922 - Oct Sun>=1 2:30 0 S 1398Rule Mont 1921 only - May 1 2:00 1:00 D 1399Rule Mont 1922 only - Apr 30 2:00 1:00 D 1400Rule Mont 1924 only - May 17 2:00 1:00 D 1401Rule Mont 1924 1926 - Sep lastSun 2:30 0 S 1402Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D 1403# The 1927-to-1937 rules can be expressed more simply as 1404# Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D 1405# Rule Mont 1927 1937 - Sep lastSat 24:00 0 S 1406# The rules below avoid use of 24:00 1407# (which pre-1998 versions of zic cannot handle). 1408Rule Mont 1927 only - May 1 0:00 1:00 D 1409Rule Mont 1927 1932 - Sep lastSun 0:00 0 S 1410Rule Mont 1928 1931 - Apr lastSun 0:00 1:00 D 1411Rule Mont 1932 only - May 1 0:00 1:00 D 1412Rule Mont 1933 1940 - Apr lastSun 0:00 1:00 D 1413Rule Mont 1933 only - Oct 1 0:00 0 S 1414Rule Mont 1934 1939 - Sep lastSun 0:00 0 S 1415Rule Mont 1946 1973 - Apr lastSun 2:00 1:00 D 1416Rule Mont 1945 1948 - Sep lastSun 2:00 0 S 1417Rule Mont 1949 1950 - Oct lastSun 2:00 0 S 1418Rule Mont 1951 1956 - Sep lastSun 2:00 0 S 1419Rule Mont 1957 1973 - Oct lastSun 2:00 0 S 1420 1421# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1422Zone America/Blanc-Sablon -3:48:28 - LMT 1884 1423 -4:00 Canada A%sT 1970 1424 -4:00 - AST 1425Zone America/Montreal -4:54:16 - LMT 1884 1426 -5:00 Mont E%sT 1918 1427 -5:00 Canada E%sT 1919 1428 -5:00 Mont E%sT 1942 Feb 9 2:00s 1429 -5:00 Canada E%sT 1946 1430 -5:00 Mont E%sT 1974 1431 -5:00 Canada E%sT 1432 1433# Ontario 1434 1435# From Paul Eggert (2006-07-09): 1436# Shanks & Pottenger write that since 1970 most of Ontario has been like 1437# Toronto. 1438# Thunder Bay skipped DST in 1973. 1439# Many smaller locales did not observe peacetime DST until 1974; 1440# Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1441# Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 1442 1443# From Mark Brader (2003-07-26): 1444# [According to the Toronto Star] Orillia, Ontario, adopted DST 1445# effective Saturday, 1912-06-22, 22:00; the article mentions that 1446# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1447# have already done so. In Orillia DST was to run until Saturday, 1448# 1912-08-31 (no time mentioned), but it was met with considerable 1449# hostility from certain segments of the public, and was revoked after 1450# only two weeks -- I copied it as Saturday, 1912-07-07, 22:00, but 1451# presumably that should be -07-06. (1912-06-19, -07-12; also letters 1452# earlier in June). 1453# 1454# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1455 1456# From Paul Eggert (1997-10-17): 1457# Mark Brader writes that an article in the 1997-10-14 Toronto Star 1458# says that Atikokan, Ontario currently does not observe DST, 1459# but will vote on 11-10 whether to use EST/EDT. 1460# He also writes that the 1461# <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html"> 1462# Ontario Time Act (1990, Chapter T.9) 1463# </a> 1464# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 1465# Officially Atikokan is therefore on CST/CDT, and most likely this report 1466# concerns a non-official time observed as a matter of local practice. 1467# 1468# From Paul Eggert (2000-10-02): 1469# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 1470# New Osnaburgh observe CST all year, that Big Trout Lake observes 1471# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 1472# violation of the official Ontario rules. 1473# 1474# From Paul Eggert (2006-07-09): 1475# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the 1476# 2005-07-21 Chronicle-Journal, which said: 1477# 1478# The clocks in Atikokan stay set on standard time year-round. 1479# This means they spend about half the time on central time and 1480# the other half on eastern time. 1481# 1482# For the most part, the system works, Mayor Dennis Brown said. 1483# 1484# "The majority of businesses in Atikokan deal more with Eastern 1485# Canada, but there are some that deal with Western Canada," he 1486# said. "I don't see any changes happening here." 1487# 1488# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang 1489# [New Osnaburgh] follow the same practice." 1490 1491# From Garry McKinnon (2006-07-14) via Chris Walton: 1492# I chatted with a member of my board who has an outstanding memory 1493# and a long history in Atikokan (and in the telecom industry) and he 1494# can say for certain that Atikokan has been practicing the current 1495# time keeping since 1952, at least. 1496 1497# From Paul Eggert (2006-07-17): 1498# Shanks & Pottenger say that Atikokan has agreed with Rainy River 1499# ever since standard time was introduced, but the information from 1500# McKinnon sounds more authoritative. For now, assume that Atikokan 1501# switched to EST immediately after WWII era daylight saving time 1502# ended. This matches the old (less-populous) America/Coral_Harbour 1503# entry since our cutoff date of 1970, so we can move 1504# America/Coral_Harbour to the 'backward' file. 1505 1506# From Mark Brader (2010-03-06): 1507# 1508# Currently the database has: 1509# 1510# # Ontario 1511# 1512# # From Paul Eggert (2006-07-09): 1513# # Shanks & Pottenger write that since 1970 most of Ontario has been like 1514# # Toronto. 1515# # Thunder Bay skipped DST in 1973. 1516# # Many smaller locales did not observe peacetime DST until 1974; 1517# # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1518# 1519# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom 1520# right corner of page 1, it says that Toronto will return to standard 1521# time at 2 am Sunday morning (which agrees with the database), and that: 1522# 1523# The one-hour setback will go into effect throughout most of Ontario, 1524# except in areas like Windsor which remains on standard time all year. 1525# 1526# Windsor is, of course, a lot larger than Nipigon. 1527# 1528# I only came across this incidentally. I don't know if Windsor began 1529# observing DST when Detroit did, or in 1974, or on some other date. 1530# 1531# By the way, the article continues by noting that: 1532# 1533# Some cities in the United States have pushed the deadline back 1534# three weeks and will change over from daylight saving in October. 1535 1536# From Arthur David Olson (2010-07-17): 1537# 1538# "Standard Time and Time Zones in Canada" appeared in 1539# The Journal of The Royal Astronomical Society of Canada, 1540# volume 26, number 2 (February 1932) and, as of 2010-07-17, 1541# was available at 1542# <a href="http://adsabs.harvard.edu/full/1932JRASC..26...49S"> 1543# http://adsabs.harvard.edu/full/1932JRASC..26...49S 1544# </a> 1545# 1546# It includes the text below (starting on page 57): 1547# 1548# A list of the places in Canada using daylight saving time would 1549# require yearly revision. From information kindly furnished by 1550# the provincial governments and by the postmasters in many cities 1551# and towns, it is found that the following places used daylight sav- 1552# ing in 1930. The information for the province of Quebec is definite, 1553# for the other provinces only approximate: 1554# 1555# Province Daylight saving time used 1556# Prince Edward Island Not used. 1557# Nova Scotia In Halifax only. 1558# New Brunswick In St. John only. 1559# Quebec In the following places: 1560# Montreal Lachine 1561# Quebec Mont-Royal 1562# Levis Iberville 1563# St. Lambert Cap de la Madeleine 1564# Verdun Loretteville 1565# Westmount Richmond 1566# Outremont St. Jerome 1567# Longueuil Greenfield Park 1568# Arvida Waterloo 1569# Chambly-Canton Beaulieu 1570# Melbourne La Tuque 1571# St. Theophile Buckingham 1572# Ontario Used generally in the cities and towns along 1573# the southerly part of the province. Not 1574# used in the northwesterlhy part. 1575# Manitoba Not used. 1576# Saskatchewan In Regina only. 1577# Alberta Not used. 1578# British Columbia Not used. 1579# 1580# With some exceptions, the use of daylight saving may be said to be limited 1581# to those cities and towns lying between Quebec city and Windsor, Ont. 1582 1583# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1584Rule Toronto 1919 only - Mar 30 23:30 1:00 D 1585Rule Toronto 1919 only - Oct 26 0:00 0 S 1586Rule Toronto 1920 only - May 2 2:00 1:00 D 1587Rule Toronto 1920 only - Sep 26 0:00 0 S 1588Rule Toronto 1921 only - May 15 2:00 1:00 D 1589Rule Toronto 1921 only - Sep 15 2:00 0 S 1590Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1591# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1592# was meant. 1593Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1594Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1595# The 1927-to-1939 rules can be expressed more simply as 1596# Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1597# Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1598# Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1599# Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1600# The rules below avoid use of Sun>=25 1601# (which pre-2004 versions of zic cannot handle). 1602Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1603Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1604Rule Toronto 1932 only - May 1 2:00 1:00 D 1605Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1606Rule Toronto 1933 only - Oct 1 2:00 0 S 1607Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1608Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1609Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1610Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1611Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1612Rule Toronto 1949 only - Nov lastSun 0:00 0 S 1613Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1614Rule Toronto 1950 only - Nov lastSun 2:00 0 S 1615Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1616# Shanks & Pottenger say Toronto ended DST a week early in 1971, 1617# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 1618# is wrong, and that he had confirmed it by checking the 1971-10-30 1619# Toronto Star, which said that DST was ending 1971-10-31 as usual. 1620Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1621 1622# From Paul Eggert (2003-07-27): 1623# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1624# Port Arthur, Ontario, the principle of the Bill has been in 1625# operation for the past three years, and in the City of Moose Jaw, 1626# Saskatchewan, for one year." 1627 1628# From David Bryan via Tory Tronrud, Director/Curator, 1629# Thunder Bay Museum (2003-11-12): 1630# There is some suggestion, however, that, by-law or not, daylight 1631# savings time was being practiced in Fort William and Port Arthur 1632# before 1909.... [I]n 1910, the line between the Eastern and Central 1633# Time Zones was permanently moved about two hundred miles west to 1634# include the Thunder Bay area.... When Canada adopted daylight 1635# savings time in 1916, Fort William and Port Arthur, having done so 1636# already, did not change their clocks.... During the Second World 1637# War,... [t]he cities agreed to implement DST during the summer 1638# months for the remainder of the war years. 1639 1640# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1641Zone America/Toronto -5:17:32 - LMT 1895 1642 -5:00 Canada E%sT 1919 1643 -5:00 Toronto E%sT 1942 Feb 9 2:00s 1644 -5:00 Canada E%sT 1946 1645 -5:00 Toronto E%sT 1974 1646 -5:00 Canada E%sT 1647Zone America/Thunder_Bay -5:57:00 - LMT 1895 1648 -6:00 - CST 1910 1649 -5:00 - EST 1942 1650 -5:00 Canada E%sT 1970 1651 -5:00 Toronto E%sT 1973 1652 -5:00 - EST 1974 1653 -5:00 Canada E%sT 1654Zone America/Nipigon -5:53:04 - LMT 1895 1655 -5:00 Canada E%sT 1940 Sep 29 1656 -5:00 1:00 EDT 1942 Feb 9 2:00s 1657 -5:00 Canada E%sT 1658Zone America/Rainy_River -6:18:16 - LMT 1895 1659 -6:00 Canada C%sT 1940 Sep 29 1660 -6:00 1:00 CDT 1942 Feb 9 2:00s 1661 -6:00 Canada C%sT 1662Zone America/Atikokan -6:06:28 - LMT 1895 1663 -6:00 Canada C%sT 1940 Sep 29 1664 -6:00 1:00 CDT 1942 Feb 9 2:00s 1665 -6:00 Canada C%sT 1945 Sep 30 2:00 1666 -5:00 - EST 1667 1668 1669# Manitoba 1670 1671# From Rob Douglas (2006-04-06): 1672# the old Manitoba Time Act - as amended by Bill 2, assented to 1673# March 27, 1987 ... said ... 1674# "between two o'clock Central Standard Time in the morning of 1675# the first Sunday of April of each year and two o'clock Central 1676# Standard Time in the morning of the last Sunday of October next 1677# following, one hour in advance of Central Standard Time."... 1678# I believe that the English legislation [of the old time act] had = 1679# been assented to (March 22, 1967).... 1680# Also, as far as I can tell, there was no order-in-council varying 1681# the time of Daylight Saving Time for 2005 and so the provisions of 1682# the 1987 version would apply - the changeover was at 2:00 Central 1683# Standard Time (i.e. not until 3:00 Central Daylight Time). 1684 1685# From Paul Eggert (2006-04-10): 1686# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1687# starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1688# it was also 02:00s in 1966. 1689 1690# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1691Rule Winn 1916 only - Apr 23 0:00 1:00 D 1692Rule Winn 1916 only - Sep 17 0:00 0 S 1693Rule Winn 1918 only - Apr 14 2:00 1:00 D 1694Rule Winn 1918 only - Oct 27 2:00 0 S 1695Rule Winn 1937 only - May 16 2:00 1:00 D 1696Rule Winn 1937 only - Sep 26 2:00 0 S 1697Rule Winn 1942 only - Feb 9 2:00 1:00 W # War 1698Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 1699Rule Winn 1945 only - Sep lastSun 2:00 0 S 1700Rule Winn 1946 only - May 12 2:00 1:00 D 1701Rule Winn 1946 only - Oct 13 2:00 0 S 1702Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 1703Rule Winn 1947 1949 - Sep lastSun 2:00 0 S 1704Rule Winn 1950 only - May 1 2:00 1:00 D 1705Rule Winn 1950 only - Sep 30 2:00 0 S 1706Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 1707Rule Winn 1951 1958 - Sep lastSun 2:00 0 S 1708Rule Winn 1959 only - Oct lastSun 2:00 0 S 1709Rule Winn 1960 only - Sep lastSun 2:00 0 S 1710Rule Winn 1963 only - Apr lastSun 2:00 1:00 D 1711Rule Winn 1963 only - Sep 22 2:00 0 S 1712Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1713Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1714Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 1715# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1716Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1717 -6:00 Winn C%sT 2006 1718 -6:00 Canada C%sT 1719 1720 1721# Saskatchewan 1722 1723# From Mark Brader (2003-07-26): 1724# The first actual adoption of DST in Canada was at the municipal 1725# level. As the [Toronto] Star put it (1912-06-07), "While people 1726# elsewhere have long been talking of legislation to save daylight, 1727# the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1728# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1729# presumably late evening, as below), and would run until "the end of 1730# the summer". The discrepancy between municipal time and railroad 1731# time was noted. 1732 1733# From Paul Eggert (2003-07-27): 1734# Willett (1914-03) notes that DST "has been in operation ... in the 1735# City of Moose Jaw, Saskatchewan, for one year." 1736 1737# From Paul Eggert (2006-03-22): 1738# Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 1739# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 1740# Other western towns (e.g. Lloydminster) are like Edmonton. 1741# Matthews and Vincent (1998) write that Denare Beach and Creighton 1742# are like Winnipeg, in violation of Saskatchewan law. 1743 1744# From W. Jones (1992-11-06): 1745# The. . .below is based on information I got from our law library, the 1746# provincial archives, and the provincial Community Services department. 1747# A precise history would require digging through newspaper archives, and 1748# since you didn't say what you wanted, I didn't bother. 1749# 1750# Saskatchewan is split by a time zone meridian (105W) and over the years 1751# the boundary became pretty ragged as communities near it reevaluated 1752# their affiliations in one direction or the other. In 1965 a provincial 1753# referendum favoured legislating common time practices. 1754# 1755# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 1756# Saskatchewan 1978) was proclaimed, and established that the eastern 1757# part of Saskatchewan would use CST year round, that districts in 1758# northwest Saskatchewan would by default follow CST but could opt to 1759# follow Mountain Time rules (thus 1 hour difference in the winter and 1760# zero in the summer), and that districts in southwest Saskatchewan would 1761# by default follow MT but could opt to follow CST. 1762# 1763# It took a few years for the dust to settle (I know one story of a town 1764# on one time zone having its school in another, such that a mom had to 1765# serve her family lunch in two shifts), but presently it seems that only 1766# a few towns on the border with Alberta (e.g. Lloydminster) follow MT 1767# rules any more; all other districts appear to have used CST year round 1768# since sometime in the 1960s. 1769 1770# From Chris Walton (2006-06-26): 1771# The Saskatchewan time act which was last updated in 1996 is about 30 pages 1772# long and rather painful to read. 1773# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 1774 1775# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1776Rule Regina 1918 only - Apr 14 2:00 1:00 D 1777Rule Regina 1918 only - Oct 27 2:00 0 S 1778Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 1779Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 1780Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 1781Rule Regina 1937 only - Oct Sun>=8 0:00 0 S 1782Rule Regina 1938 only - Oct Sun>=1 0:00 0 S 1783Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1784Rule Regina 1942 only - Feb 9 2:00 1:00 W # War 1785Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 1786Rule Regina 1945 only - Sep lastSun 2:00 0 S 1787Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 1788Rule Regina 1946 only - Oct Sun>=8 2:00 0 S 1789Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1790Rule Regina 1947 1957 - Sep lastSun 2:00 0 S 1791Rule Regina 1959 only - Apr lastSun 2:00 1:00 D 1792Rule Regina 1959 only - Oct lastSun 2:00 0 S 1793# 1794Rule Swift 1957 only - Apr lastSun 2:00 1:00 D 1795Rule Swift 1957 only - Oct lastSun 2:00 0 S 1796Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 1797Rule Swift 1959 only - Oct lastSun 2:00 0 S 1798Rule Swift 1960 1961 - Sep lastSun 2:00 0 S 1799# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1800Zone America/Regina -6:58:36 - LMT 1905 Sep 1801 -7:00 Regina M%sT 1960 Apr lastSun 2:00 1802 -6:00 - CST 1803Zone America/Swift_Current -7:11:20 - LMT 1905 Sep 1804 -7:00 Canada M%sT 1946 Apr lastSun 2:00 1805 -7:00 Regina M%sT 1950 1806 -7:00 Swift M%sT 1972 Apr lastSun 2:00 1807 -6:00 - CST 1808 1809 1810# Alberta 1811 1812# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1813Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 1814Rule Edm 1918 only - Oct 27 2:00 0 S 1815Rule Edm 1919 only - May 27 2:00 0 S 1816Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 1817Rule Edm 1920 only - Oct lastSun 2:00 0 S 1818Rule Edm 1921 1923 - Sep lastSun 2:00 0 S 1819Rule Edm 1942 only - Feb 9 2:00 1:00 W # War 1820Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 1821Rule Edm 1945 only - Sep lastSun 2:00 0 S 1822Rule Edm 1947 only - Apr lastSun 2:00 1:00 D 1823Rule Edm 1947 only - Sep lastSun 2:00 0 S 1824Rule Edm 1967 only - Apr lastSun 2:00 1:00 D 1825Rule Edm 1967 only - Oct lastSun 2:00 0 S 1826Rule Edm 1969 only - Apr lastSun 2:00 1:00 D 1827Rule Edm 1969 only - Oct lastSun 2:00 0 S 1828Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1829Rule Edm 1972 2006 - Oct lastSun 2:00 0 S 1830# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1831Zone America/Edmonton -7:33:52 - LMT 1906 Sep 1832 -7:00 Edm M%sT 1987 1833 -7:00 Canada M%sT 1834 1835 1836# British Columbia 1837 1838# From Paul Eggert (2006-03-22): 1839# Shanks & Pottenger write that since 1970 most of this region has 1840# been like Vancouver. 1841# Dawson Creek uses MST. Much of east BC is like Edmonton. 1842# Matthews and Vincent (1998) write that Creston is like Dawson Creek. 1843 1844# It seems though that (re: Creston) is not entirely correct: 1845 1846# From Chris Walton (2011-12-01): 1847# There are two areas within the Canadian province of British Columbia 1848# that do not currently observe daylight saving: 1849# a) The Creston Valley (includes the town of Creston and surrounding area) 1850# b) The eastern half of the Peace River Regional District 1851# (includes the cities of Dawson Creek and Fort St. John) 1852 1853# Earlier this year I stumbled across a detailed article about the time 1854# keeping history of Creston; it was written by Tammy Hardwick who is the 1855# manager of the Creston & District Museum. The article was written in May 2009. 1856# <a href="http://www.ilovecreston.com/?p=articles&t=spec&ar=260"> 1857# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1858# </a> 1859# According to the article, Creston has not changed its clocks since June 1918. 1860# i.e. Creston has been stuck on UTC-7 for 93 years. 1861# Dawson Creek, on the other hand, changed its clocks as recently as April 1972. 1862 1863# Unfortunately the exact date for the time change in June 1918 remains 1864# unknown and will be difficult to ascertain. I e-mailed Tammy a few months 1865# ago to ask if Sunday June 2 was a reasonable guess. She said it was just 1866# as plausible as any other date (in June). She also said that after writing the 1867# article she had discovered another time change in 1916; this is the subject 1868# of another article which she wrote in October 2010. 1869# <a href="http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56"> 1870# http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56 1871# </a> 1872 1873# Here is a summary of the three clock change events in Creston's history: 1874# 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7) 1875# Exact date unknown 1876# 2. Oct 1916: switch to Pacific Standard Time (GMT-8) 1877# Exact date in October unknown; Sunday October 1 is a reasonable guess. 1878# 3. June 1918: switch to Pacific Daylight Time (GMT-7) 1879# Exact date in June unknown; Sunday June 2 is a reasonable guess. 1880# note#1: 1881# On Oct 27/1918 when daylight saving ended in the rest of Canada, 1882# Creston did not change its clocks. 1883# note#2: 1884# During WWII when the Federal Government legislated a mandatory clock change, 1885# Creston did not oblige. 1886# note#3: 1887# There is no guarantee that Creston will remain on Mountain Standard Time 1888# (UTC-7) forever. 1889# The subject was debated at least once this year by the town Council. 1890# <a href="http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html"> 1891# http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html 1892# </a> 1893 1894# During a period WWII, summer time (Daylight saying) was mandatory in Canada. 1895# In Creston, that was handled by shifting the area to PST (-8:00) then applying 1896# summer time to cause the offset to be -7:00, the same as it had been before 1897# the change. It can be argued that the timezone abbreviation during this 1898# period should be PDT rather than MST, but that doesn't seem important enough 1899# (to anyone) to further complicate the rules. 1900 1901# The transition dates (and times) are guesses. 1902 1903# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1904Rule Vanc 1918 only - Apr 14 2:00 1:00 D 1905Rule Vanc 1918 only - Oct 27 2:00 0 S 1906Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1907Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 1908Rule Vanc 1945 only - Sep 30 2:00 0 S 1909Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 1910Rule Vanc 1946 only - Oct 13 2:00 0 S 1911Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S 1912Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S 1913# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1914Zone America/Vancouver -8:12:28 - LMT 1884 1915 -8:00 Vanc P%sT 1987 1916 -8:00 Canada P%sT 1917Zone America/Dawson_Creek -8:00:56 - LMT 1884 1918 -8:00 Canada P%sT 1947 1919 -8:00 Vanc P%sT 1972 Aug 30 2:00 1920 -7:00 - MST 1921Zone America/Creston -7:46:04 - LMT 1884 1922 -7:00 - MST 1916 Oct 1 1923 -8:00 - PST 1918 Jun 2 1924 -7:00 - MST 1925 1926# Northwest Territories, Nunavut, Yukon 1927 1928# From Paul Eggert (2006-03-22): 1929# Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 1930# Mathew Englander (1996-10-07) gives the following refs: 1931# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 1932# c. 7 defines Yukon standard time as UTC-9. This is still valid; 1933# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 1934# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 1935# * O.I.C. 1980/02 established DST. 1936# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 1937# Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go 1938# with Englander. 1939# From Chris Walton (2006-06-26): 1940# Here is a link to the old daylight saving portion of the interpretation 1941# act which was last updated in 1987: 1942# http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf 1943 1944# From Rives McDow (1999-09-04): 1945# Nunavut ... moved ... to incorporate the whole territory into one time zone. 1946# <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html"> 1947# Nunavut moves to single time zone Oct. 31 1948# </a> 1949# 1950# From Antoine Leca (1999-09-06): 1951# We then need to create a new timezone for the Kitikmeot region of Nunavut 1952# to differentiate it from the Yellowknife region. 1953 1954# From Paul Eggert (1999-09-20): 1955# <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html"> 1956# Basic Facts: The New Territory 1957# </a> (1999) reports that Pangnirtung operates on eastern time, 1958# and that Coral Harbour does not observe DST. We don't know when 1959# Pangnirtung switched to eastern time; we'll guess 1995. 1960 1961# From Rives McDow (1999-11-08): 1962# On October 31, when the rest of Nunavut went to Central time, 1963# Pangnirtung wobbled. Here is the result of their wobble: 1964# 1965# The following businesses and organizations in Pangnirtung use Central Time: 1966# 1967# First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 1968# Eastern Arctic National Parks, A & D Specialist 1969# 1970# The following businesses and organizations in Pangnirtung use Eastern Time: 1971# 1972# Hamlet office, All other businesses, Both schools, Airport operator 1973# 1974# This has made for an interesting situation there, which warranted the news. 1975# No one there that I spoke with seems concerned, or has plans to 1976# change the local methods of keeping time, as it evidently does not 1977# really interfere with any activities or make things difficult locally. 1978# They plan to celebrate New Year's turn-over twice, one hour apart, 1979# so it appears that the situation will last at least that long. 1980# The Nunavut Intergovernmental Affairs hopes that they will "come to 1981# their senses", but the locals evidently don't see any problem with 1982# the current state of affairs. 1983 1984# From Michaela Rodrigue, writing in the 1985# <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html"> 1986# Nunatsiaq News (1999-11-19)</a>: 1987# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 1988# central - or Nunavut time - for government offices, and eastern time 1989# for municipal offices and schools.... Igloolik [was similar but then] 1990# made the switch to central time on Saturday, Nov. 6. 1991 1992# From Paul Eggert (2000-10-02): 1993# Matthews and Vincent (1998) say the following, but we lack histories 1994# for these potential new Zones. 1995# 1996# The Canadian Forces station at Alert uses Eastern Time while the 1997# handful of residents at the Eureka weather station [in the Central 1998# zone] skip daylight savings. Baffin Island, which is crossed by the 1999# Central, Eastern and Atlantic Time zones only uses Eastern Time. 2000# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 2001# Central Time and Southampton Island [in the Central zone] is not 2002# required to use daylight savings. 2003 2004# From 2005# <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html"> 2006# Nunavut now has two time zones 2007# </a> (2000-11-10): 2008# The Nunavut government would allow its employees in Kugluktuk and 2009# Cambridge Bay to operate on central time year-round, putting them 2010# one hour behind the rest of Nunavut for six months during the winter. 2011# At the end of October the two communities had rebelled against 2012# Nunavut's unified time zone, refusing to shift to eastern time with 2013# the rest of the territory for the winter. Cambridge Bay remained on 2014# central time, while Kugluktuk, even farther west, reverted to 2015# mountain time, which they had used before the advent of Nunavut's 2016# unified time zone in 1999. 2017# 2018# From Rives McDow (2001-01-20), quoting the Nunavut government: 2019# The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 2020 2021# From Paul Eggert (2000-12-04): 2022# Let's just keep track of the official times for now. 2023 2024# From Rives McDow (2001-03-07): 2025# The premier of Nunavut has issued a ministerial statement advising 2026# that effective 2001-04-01, the territory of Nunavut will revert 2027# back to three time zones (mountain, central, and eastern). Of the 2028# cities in Nunavut, Coral Harbor is the only one that I know of that 2029# has said it will not observe dst, staying on EST year round. I'm 2030# checking for more info, and will get back to you if I come up with 2031# more. 2032# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 2033 2034# From Gwillim Law (2005-05-21): 2035# According to maps at 2036# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg 2037# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg 2038# (both dated 2003), and 2039# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 2040# (from a 1998 Canadian Geographic article), the de facto and de jure time 2041# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 2042# round. Using Google, it's easy to find other websites that confirm this. 2043# I wasn't able to find how far back this time regimen goes, but since it 2044# predates the creation of Nunavut, it probably goes back many years.... 2045# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 2046# 2047# From Paul Eggert (2005-07-26): 2048# For lack of better information, assume that Southampton Island observed 2049# daylight saving only during wartime. 2050 2051# From Chris Walton (2007-03-01): 2052# ... the community of Resolute (located on Cornwallis Island in 2053# Nunavut) moved from Central Time to Eastern Time last November. 2054# Basically the community did not change its clocks at the end of 2055# daylight saving.... 2056# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 2057 2058# From Chris Walton (2011-03-21): 2059# Back in 2007 I initiated the creation of a new "zone file" for Resolute 2060# Bay. Resolute Bay is a small community located about 900km north of 2061# the Arctic Circle. The zone file was required because Resolute Bay had 2062# decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007. 2063# 2064# According to new information which I received last week, Resolute Bay 2065# went back to using UTC-6 in the winter of 2007-2008... 2066# 2067# On March 11/2007 most of Canada went onto daylight saving. On March 2068# 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I 2069# talked to somebody that was both knowledgeable and helpful. I was able 2070# to confirm that Resolute Bay was still operating on UTC-5. It was 2071# explained to me that Resolute Bay had been on the Eastern Time zone 2072# (EST) in the winter, and was now back on the Central Time zone (CDT). 2073# i.e. the time zone had changed twice in the last year but the clocks 2074# had not moved. The residents had to know which time zone they were in 2075# so they could follow the correct TV schedule... 2076# 2077# On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I 2078# phoned the Resolute Bay hamlet office...[D]ue to the challenging nature 2079# of the phone call, I decided to seek out an alternate source of 2080# information. I found an e-mail address for somebody by the name of 2081# Stephanie Adams whose job was listed as "Inns North Support Officer for 2082# Arctic Co-operatives." I was under the impression that Stephanie lived 2083# and worked in Resolute Bay... 2084# 2085# On March 14/2011 I phoned the hamlet office again. I was told that 2086# Resolute Bay had been using Central Standard Time over the winter of 2087# 2010-2011 and that the clocks had therefore been moved one hour ahead 2088# on March 13/2011. The person I talked to was aware that Resolute Bay 2089# had previously experimented with Eastern Standard Time but he could not 2090# tell me when the practice had stopped. 2091# 2092# On March 17/2011 I searched the Web to find an e-mail address of 2093# somebody that might be able to tell me exactly when Resolute Bay went 2094# off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz 2095# used to be the mayor of Resolute Bay and he apparently owns half the 2096# businesses including "South Camp Inn." This website has some info on 2097# Aziz: 2098# <a href="http://www.uphere.ca/node/493"> 2099# http://www.uphere.ca/node/493 2100# </a> 2101# 2102# I sent Aziz an e-mail asking when Resolute Bay had stopped using 2103# Eastern Standard Time. 2104# 2105# Aziz responded quickly with this: "hi, The time was not changed for the 2106# 1 year only, the following year, the community went back to the old way 2107# of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in 2108# the winter Zulu plus 6 hrs" 2109# 2110# This of course conflicted with everything I had ascertained in November 2008. 2111# 2112# I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz 2113# responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You 2114# may want to check with the weather office in Resolute Bay or do a 2115# search on the weather through Env. Canada. web site" 2116# 2117# If I had realized the Stephanie did not live in Resolute Bay I would 2118# never have contacted her. I now believe that all the information I 2119# obtained in November 2008 should be ignored... 2120# I apologize for reporting incorrect information in 2008. 2121 2122# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2123Rule NT_YK 1918 only - Apr 14 2:00 1:00 D 2124Rule NT_YK 1918 only - Oct 27 2:00 0 S 2125Rule NT_YK 1919 only - May 25 2:00 1:00 D 2126Rule NT_YK 1919 only - Nov 1 0:00 0 S 2127Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 2128Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 2129Rule NT_YK 1945 only - Sep 30 2:00 0 S 2130Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 2131Rule NT_YK 1965 only - Oct lastSun 2:00 0 S 2132Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 2133Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 2134Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 2135# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2136# aka Panniqtuuq 2137Zone America/Pangnirtung 0 - zzz 1921 # trading post est. 2138 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 2139 -5:00 Canada E%sT 1999 Oct 31 2:00 2140 -6:00 Canada C%sT 2000 Oct 29 2:00 2141 -5:00 Canada E%sT 2142# formerly Frobisher Bay 2143Zone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est. 2144 -5:00 NT_YK E%sT 1999 Oct 31 2:00 2145 -6:00 Canada C%sT 2000 Oct 29 2:00 2146 -5:00 Canada E%sT 2147# aka Qausuittuq 2148Zone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded 2149 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2150 -5:00 - EST 2001 Apr 1 3:00 2151 -6:00 Canada C%sT 2006 Oct 29 2:00 2152 -5:00 - EST 2007 Mar 11 3:00 2153 -6:00 Canada C%sT 2154# aka Kangiqiniq 2155Zone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded 2156 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2157 -5:00 - EST 2001 Apr 1 3:00 2158 -6:00 Canada C%sT 2159# aka Iqaluktuuttiaq 2160Zone America/Cambridge_Bay 0 - zzz 1920 # trading post est.? 2161 -7:00 NT_YK M%sT 1999 Oct 31 2:00 2162 -6:00 Canada C%sT 2000 Oct 29 2:00 2163 -5:00 - EST 2000 Nov 5 0:00 2164 -6:00 - CST 2001 Apr 1 3:00 2165 -7:00 Canada M%sT 2166Zone America/Yellowknife 0 - zzz 1935 # Yellowknife founded? 2167 -7:00 NT_YK M%sT 1980 2168 -7:00 Canada M%sT 2169Zone America/Inuvik 0 - zzz 1953 # Inuvik founded 2170 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 2171 -7:00 NT_YK M%sT 1980 2172 -7:00 Canada M%sT 2173Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 2174 -9:00 NT_YK Y%sT 1966 Jul 1 2:00 2175 -8:00 NT_YK P%sT 1980 2176 -8:00 Canada P%sT 2177Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 2178 -9:00 NT_YK Y%sT 1973 Oct 28 0:00 2179 -8:00 NT_YK P%sT 1980 2180 -8:00 Canada P%sT 2181 2182 2183############################################################################### 2184 2185# Mexico 2186 2187# From Paul Eggert (2001-03-05): 2188# The Investigation and Analysis Service of the 2189# Mexican Library of Congress (MLoC) has published a 2190# <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/"> 2191# history of Mexican local time (in Spanish) 2192# </a>. 2193# 2194# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 2195# (In all cases we go with the MLoC.) 2196# S&P report that Baja was at -8:00 in 1922/1923. 2197# S&P say the 1930 transition in Baja was 1930-11-16. 2198# S&P report no DST during summer 1931. 2199# S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 2200 2201# From Gwillim Law (2001-02-20): 2202# There are some other discrepancies between the Decrees page and the 2203# tz database. I think they can best be explained by supposing that 2204# the researchers who prepared the Decrees page failed to find some of 2205# the relevant documents. 2206 2207# From Alan Perry (1996-02-15): 2208# A guy from our Mexico subsidiary finally found the Presidential Decree 2209# outlining the timezone changes in Mexico. 2210# 2211# ------------- Begin Forwarded Message ------------- 2212# 2213# I finally got my hands on the Official Presidential Decree that sets up the 2214# rules for the DST changes. The rules are: 2215# 2216# 1. The country is divided in 3 timezones: 2217# - Baja California Norte (the Mexico/BajaNorte TZ) 2218# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 2219# - The rest of the country (the Mexico/General TZ) 2220# 2221# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 2222# at 2:00 AM, the times in each zone are as follows: 2223# BajaNorte: GMT+7 2224# BajaSur: GMT+6 2225# General: GMT+5 2226# 2227# 3. The rest of the year, the times are as follows: 2228# BajaNorte: GMT+8 2229# BajaSur: GMT+7 2230# General: GMT+6 2231# 2232# The Decree was published in Mexico's Official Newspaper on January 4th. 2233# 2234# -------------- End Forwarded Message -------------- 2235# From Paul Eggert (1996-06-12): 2236# For an English translation of the decree, see 2237# <a href="http://mexico-travel.com/extra/timezone_eng.html"> 2238# "Diario Oficial: Time Zone Changeover" (1996-01-04). 2239# </a> 2240 2241# From Rives McDow (1998-10-08): 2242# The State of Quintana Roo has reverted back to central STD and DST times 2243# (i.e. UTC -0600 and -0500 as of 1998-08-02). 2244 2245# From Rives McDow (2000-01-10): 2246# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 2247# zone 5 hours from the International Date Line, and will not observe daylight 2248# savings time so as to stay on the same time zone as the southern part of 2249# Arizona year round. 2250 2251# From Jesper Norgaard, translating 2252# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 2253# In Oaxaca, the 55.000 teachers from the Section 22 of the National 2254# Syndicate of Education Workers, refuse to apply daylight saving each 2255# year, so that the more than 10,000 schools work at normal hour the 2256# whole year. 2257 2258# From Gwillim Law (2001-01-19): 2259# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 2260# (translated):... 2261# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 2262# that Summer Time will be reduced from seven to five months, starting 2263# this year.... 2264# <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001> 2265# [translated], says "summer time will ... take effect on the first Sunday 2266# in May, and end on the last Sunday of September. 2267 2268# From Arthur David Olson (2001-01-25): 2269# The 2001-01-24 traditional Washington Post contained the page one 2270# story "Timely Issue Divides Mexicans."... 2271# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 2272# ... Mexico City Mayor Lopez Obrador "...is threatening to keep 2273# Mexico City and its 20 million residents on a different time than 2274# the rest of the country..." In particular, Lopez Obrador would abolish 2275# observation of Daylight Saving Time. 2276 2277# <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre"> 2278# Official statute published by the Energy Department 2279# </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 2280# and Sonora with no DST. This was reported by Jesper Norgaard (2001-02-03). 2281 2282# From Paul Eggert (2001-03-03): 2283# 2284# <a href="http://www.latimes.com/news/nation/20010303/t000018766.html"> 2285# James F. Smith writes in today's LA Times 2286# </a> 2287# * Sonora will continue to observe standard time. 2288# * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that 2289# the Federal District will not adopt DST. 2290# * 4 of 16 district leaders announced they'll ignore the decree. 2291# * The decree does not affect federal-controlled facilities including 2292# the airport, banks, hospitals, and schools. 2293# 2294# For now we'll assume that the Federal District will bow to federal rules. 2295 2296# From Jesper Norgaard (2001-04-01): 2297# I found some references to the Mexican application of daylight 2298# saving, which modifies what I had already sent you, stating earlier 2299# that a number of northern Mexican states would go on daylight 2300# saving. The modification reverts this to only cover Baja California 2301# (Norte), while all other states (except Sonora, who has no daylight 2302# saving all year) will follow the original decree of president 2303# Vicente Fox, starting daylight saving May 6, 2001 and ending 2304# September 30, 2001. 2305# References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp> 2306# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 2307 2308# From Reuters (2001-09-04): 2309# Mexico's Supreme Court on Tuesday declared that daylight savings was 2310# unconstitutional in Mexico City, creating the possibility the 2311# capital will be in a different time zone from the rest of the nation 2312# next year.... The Supreme Court's ruling takes effect at 2:00 2313# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 2314# standard time. "This is so residents of the Federal District are not 2315# subject to unexpected time changes," a statement from the court said. 2316 2317# From Jesper Norgaard Welen (2002-03-12): 2318# ... consulting my local grocery store(!) and my coworkers, they all insisted 2319# that a new decision had been made to reinstate US style DST in Mexico.... 2320# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 2321# confirms this. Sonora as usual is the only state where DST is not applied. 2322 2323# From Steffen Thorsen (2009-12-28): 2324# 2325# Steffen Thorsen wrote: 2326# > Mexico's House of Representatives has approved a proposal for northern 2327# > Mexico's border cities to share the same daylight saving schedule as 2328# > the United States. 2329# Now this has passed both the Congress and the Senate, so starting from 2330# 2010, some border regions will be the same: 2331# <a href="http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/"> 2332# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ 2333# </a> 2334# <a href="http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939"> 2335# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 2336# </a> 2337# (Spanish) 2338# 2339# Could not find the new law text, but the proposed law text changes are here: 2340# <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf"> 2341# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf 2342# </a> 2343# (Gaceta Parlamentaria) 2344# 2345# There is also a list of the votes here: 2346# <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html"> 2347# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html 2348# </a> 2349# 2350# Our page: 2351# <a href="http://www.timeanddate.com/news/time/north-mexico-dst-change.html"> 2352# http://www.timeanddate.com/news/time/north-mexico-dst-change.html 2353# </a> 2354 2355# From Arthur David Olson (2010-01-20): 2356# The page 2357# <a href="http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010"> 2358# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2359# </a> 2360# includes this text: 2361# En los municipios fronterizos de Tijuana y Mexicali en Baja California; 2362# Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila; 2363# Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en 2364# Tamaulipas, la aplicación de este horario estacional surtirá efecto 2365# desde las dos horas del segundo domingo de marzo y concluirá a las dos 2366# horas del primer domingo de noviembre. 2367# En los municipios fronterizos que se encuentren ubicados en la franja 2368# fronteriza norte en el territorio comprendido entre la línea 2369# internacional y la línea paralela ubicada a una distancia de veinte 2370# kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el 2371# interior del país, la aplicación de este horario estacional surtirá 2372# efecto desde las dos horas del segundo domingo de marzo y concluirá a 2373# las dos horas del primer domingo de noviembre. 2374 2375# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2376Rule Mexico 1939 only - Feb 5 0:00 1:00 D 2377Rule Mexico 1939 only - Jun 25 0:00 0 S 2378Rule Mexico 1940 only - Dec 9 0:00 1:00 D 2379Rule Mexico 1941 only - Apr 1 0:00 0 S 2380Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War 2381Rule Mexico 1944 only - May 1 0:00 0 S 2382Rule Mexico 1950 only - Feb 12 0:00 1:00 D 2383Rule Mexico 1950 only - Jul 30 0:00 0 S 2384Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 2385Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S 2386Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D 2387Rule Mexico 2001 only - Sep lastSun 2:00 0 S 2388Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 2389Rule Mexico 2002 max - Oct lastSun 2:00 0 S 2390# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2391# Quintana Roo 2392Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 2393 -6:00 - CST 1981 Dec 23 2394 -5:00 Mexico E%sT 1998 Aug 2 2:00 2395 -6:00 Mexico C%sT 2396# Campeche, Yucatan 2397Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 2398 -6:00 - CST 1981 Dec 23 2399 -5:00 - EST 1982 Dec 2 2400 -6:00 Mexico C%sT 2401# Coahuila, Durango, Nuevo Leon, Tamaulipas (near US border) 2402Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 2403 -6:00 - CST 1988 2404 -6:00 US C%sT 1989 2405 -6:00 Mexico C%sT 2010 2406 -6:00 US C%sT 2407# Coahuila, Durango, Nuevo Leon, Tamaulipas (away from US border) 2408Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 2409 -6:00 - CST 1988 2410 -6:00 US C%sT 1989 2411 -6:00 Mexico C%sT 2412# Central Mexico 2413Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 2414 -7:00 - MST 1927 Jun 10 23:00 2415 -6:00 - CST 1930 Nov 15 2416 -7:00 - MST 1931 May 1 23:00 2417 -6:00 - CST 1931 Oct 2418 -7:00 - MST 1932 Apr 1 2419 -6:00 Mexico C%sT 2001 Sep 30 02:00 2420 -6:00 - CST 2002 Feb 20 2421 -6:00 Mexico C%sT 2422# Chihuahua (near US border) 2423Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 2424 -7:00 - MST 1927 Jun 10 23:00 2425 -6:00 - CST 1930 Nov 15 2426 -7:00 - MST 1931 May 1 23:00 2427 -6:00 - CST 1931 Oct 2428 -7:00 - MST 1932 Apr 1 2429 -6:00 - CST 1996 2430 -6:00 Mexico C%sT 1998 2431 -6:00 - CST 1998 Apr Sun>=1 3:00 2432 -7:00 Mexico M%sT 2010 2433 -7:00 US M%sT 2434# Chihuahua (away from US border) 2435Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 2436 -7:00 - MST 1927 Jun 10 23:00 2437 -6:00 - CST 1930 Nov 15 2438 -7:00 - MST 1931 May 1 23:00 2439 -6:00 - CST 1931 Oct 2440 -7:00 - MST 1932 Apr 1 2441 -6:00 - CST 1996 2442 -6:00 Mexico C%sT 1998 2443 -6:00 - CST 1998 Apr Sun>=1 3:00 2444 -7:00 Mexico M%sT 2445# Sonora 2446Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 2447 -7:00 - MST 1927 Jun 10 23:00 2448 -6:00 - CST 1930 Nov 15 2449 -7:00 - MST 1931 May 1 23:00 2450 -6:00 - CST 1931 Oct 2451 -7:00 - MST 1932 Apr 1 2452 -6:00 - CST 1942 Apr 24 2453 -7:00 - MST 1949 Jan 14 2454 -8:00 - PST 1970 2455 -7:00 Mexico M%sT 1999 2456 -7:00 - MST 2457 2458# From Alexander Krivenyshev (2010-04-21): 2459# According to news, Bahía de Banderas (Mexican state of Nayarit) 2460# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to 2461# share the same time zone as nearby city Puerto Vallarta, Jalisco). 2462# 2463# (Spanish) 2464# Bahía de Banderas homologa su horario al del centro del 2465# país, a partir de este domingo 2466# <a href="http://www.nayarit.gob.mx/notes.asp?id=20748"> 2467# http://www.nayarit.gob.mx/notes.asp?id=20748 2468# </a> 2469# 2470# Bahía de Banderas homologa su horario con el del Centro del 2471# País 2472# <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"> 2473# 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" 2474# </a> 2475# 2476# (English) 2477# Puerto Vallarta and Bahía de Banderas: One Time Zone 2478# <a href="http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml"> 2479# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml 2480# </a> 2481# 2482# or 2483# <a href="http://www.worldtimezone.com/dst_news/dst_news_mexico08.html"> 2484# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html 2485# </a> 2486# 2487# "Mexico's Senate approved the amendments to the Mexican Schedule System that 2488# will allow Bahía de Banderas and Puerto Vallarta to share the same time 2489# zone ..." 2490# Baja California Sur, Nayarit, Sinaloa 2491 2492# From Arthur David Olson (2010-05-01): 2493# Use "Bahia_Banderas" to keep the name to fourteen characters. 2494 2495Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 2496 -7:00 - MST 1927 Jun 10 23:00 2497 -6:00 - CST 1930 Nov 15 2498 -7:00 - MST 1931 May 1 23:00 2499 -6:00 - CST 1931 Oct 2500 -7:00 - MST 1932 Apr 1 2501 -6:00 - CST 1942 Apr 24 2502 -7:00 - MST 1949 Jan 14 2503 -8:00 - PST 1970 2504 -7:00 Mexico M%sT 2505 2506Zone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 2507 -7:00 - MST 1927 Jun 10 23:00 2508 -6:00 - CST 1930 Nov 15 2509 -7:00 - MST 1931 May 1 23:00 2510 -6:00 - CST 1931 Oct 2511 -7:00 - MST 1932 Apr 1 2512 -6:00 - CST 1942 Apr 24 2513 -7:00 - MST 1949 Jan 14 2514 -8:00 - PST 1970 2515 -7:00 Mexico M%sT 2010 Apr 4 2:00 2516 -6:00 Mexico C%sT 2517 2518# Baja California (near US border) 2519Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 2520 -7:00 - MST 1924 2521 -8:00 - PST 1927 Jun 10 23:00 2522 -7:00 - MST 1930 Nov 15 2523 -8:00 - PST 1931 Apr 1 2524 -8:00 1:00 PDT 1931 Sep 30 2525 -8:00 - PST 1942 Apr 24 2526 -8:00 1:00 PWT 1945 Aug 14 23:00u 2527 -8:00 1:00 PPT 1945 Nov 12 # Peace 2528 -8:00 - PST 1948 Apr 5 2529 -8:00 1:00 PDT 1949 Jan 14 2530 -8:00 - PST 1954 2531 -8:00 CA P%sT 1961 2532 -8:00 - PST 1976 2533 -8:00 US P%sT 1996 2534 -8:00 Mexico P%sT 2001 2535 -8:00 US P%sT 2002 Feb 20 2536 -8:00 Mexico P%sT 2010 2537 -8:00 US P%sT 2538# Baja California (away from US border) 2539Zone America/Santa_Isabel -7:39:28 - LMT 1922 Jan 1 0:20:32 2540 -7:00 - MST 1924 2541 -8:00 - PST 1927 Jun 10 23:00 2542 -7:00 - MST 1930 Nov 15 2543 -8:00 - PST 1931 Apr 1 2544 -8:00 1:00 PDT 1931 Sep 30 2545 -8:00 - PST 1942 Apr 24 2546 -8:00 1:00 PWT 1945 Aug 14 23:00u 2547 -8:00 1:00 PPT 1945 Nov 12 # Peace 2548 -8:00 - PST 1948 Apr 5 2549 -8:00 1:00 PDT 1949 Jan 14 2550 -8:00 - PST 1954 2551 -8:00 CA P%sT 1961 2552 -8:00 - PST 1976 2553 -8:00 US P%sT 1996 2554 -8:00 Mexico P%sT 2001 2555 -8:00 US P%sT 2002 Feb 20 2556 -8:00 Mexico P%sT 2557# From Paul Eggert (2006-03-22): 2558# Formerly there was an America/Ensenada zone, which differed from 2559# America/Tijuana only in that it did not observe DST from 1976 2560# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2561# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 2562# that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and 2563# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 2564# DST-observance was a town-by-town matter back then. This concerns 2565# data after 1970 so most likely there should be at least one Zone 2566# other than America/Tijuana for Baja, but it's not clear yet what its 2567# name or contents should be. 2568# 2569# Revillagigedo Is 2570# no information 2571 2572############################################################################### 2573 2574# Anguilla 2575# See 'southamerica'. 2576 2577# Antigua and Barbuda 2578# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2579Zone America/Antigua -4:07:12 - LMT 1912 Mar 2 2580 -5:00 - EST 1951 2581 -4:00 - AST 2582 2583# Bahamas 2584# 2585# For 1899 Milne gives -5:09:29.5; round that. 2586# 2587# From Sue Williams (2006-12-07): 2588# The Bahamas announced about a month ago that they plan to change their DST 2589# rules to sync with the U.S. starting in 2007.... 2590# http://www.jonesbahamas.com/?c=45&a=10412 2591 2592# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2593Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S 2594Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D 2595# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2596Zone America/Nassau -5:09:30 - LMT 1912 Mar 2 2597 -5:00 Bahamas E%sT 1976 2598 -5:00 US E%sT 2599 2600# Barbados 2601 2602# For 1899 Milne gives -3:58:29.2; round that. 2603 2604# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2605Rule Barb 1977 only - Jun 12 2:00 1:00 D 2606Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 2607Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 2608Rule Barb 1979 only - Sep 30 2:00 0 S 2609Rule Barb 1980 only - Sep 25 2:00 0 S 2610# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2611Zone America/Barbados -3:58:29 - LMT 1924 # Bridgetown 2612 -3:58:29 - BMT 1932 # Bridgetown Mean Time 2613 -4:00 Barb A%sT 2614 2615# Belize 2616# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. 2617# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2618Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 2619Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 2620Rule Belize 1973 only - Dec 5 0:00 1:00 D 2621Rule Belize 1974 only - Feb 9 0:00 0 S 2622Rule Belize 1982 only - Dec 18 0:00 1:00 D 2623Rule Belize 1983 only - Feb 12 0:00 0 S 2624# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2625Zone America/Belize -5:52:48 - LMT 1912 Apr 2626 -6:00 Belize C%sT 2627 2628# Bermuda 2629 2630# For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower, 2631# Bermuda dockyard, Ireland I; round that. 2632 2633# From Dan Jones, reporting in The Royal Gazette (2006-06-26): 2634 2635# Next year, however, clocks in the US will go forward on the second Sunday 2636# in March, until the first Sunday in November. And, after the Time Zone 2637# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 2638# Friday, the same thing will happen in Bermuda. 2639# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 2640 2641# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2642Zone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton 2643 -4:00 - AST 1974 Apr 28 2:00 2644 -4:00 Canada A%sT 1976 2645 -4:00 US A%sT 2646 2647# Cayman Is 2648# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2649Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown 2650 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 2651 -5:00 - EST 2652 2653# Costa Rica 2654 2655# Milne gives -5:36:13.3 as San Jose mean time; round to nearest. 2656 2657# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2658Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D 2659Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S 2660Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 2661# IATA SSIM (1991-09) says the following was at 1:00; 2662# go with Shanks & Pottenger. 2663Rule CR 1991 only - Jul 1 0:00 0 S 2664Rule CR 1992 only - Mar 15 0:00 0 S 2665# There are too many San Joses elsewhere, so we'll use 'Costa Rica'. 2666# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2667Zone America/Costa_Rica -5:36:13 - LMT 1890 # San Jose 2668 -5:36:13 - SJMT 1921 Jan 15 # San Jose Mean Time 2669 -6:00 CR C%sT 2670# Coco 2671# no information; probably like America/Costa_Rica 2672 2673# Cuba 2674 2675# From Paul Eggert (2013-02-21): 2676# Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57 2677# for the port, and -5:30 for meteorological observations. 2678# For now, stick with Shanks & Pottenger. 2679 2680# From Arthur David Olson (1999-03-29): 2681# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 2682# the Cuban National Team and the Baltimore Orioles was carried live on 2683# the Orioles Radio Network, including affiliate WTOP in Washington, DC. 2684# During the game, play-by-play announcer Jim Hunter noted that 2685# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 2686# Time today." (The "two hour" remark referred to losing one hour of 2687# sleep on 1999-03-28--when the announcers were in Cuba as it switched 2688# to DST--and one more hour on 1999-04-04--when the announcers will have 2689# returned to Baltimore, which switches on that date.) 2690 2691# From Evert van der Veer via Steffen Thorsen (2004-10-28): 2692# Cuba is not going back to standard time this year. 2693# From Paul Eggert (2006-03-22): 2694# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 2695# says that it's due to a problem at the Antonio Guiteras 2696# thermoelectric plant, and says "This October there will be no return 2697# to normal hours (after daylight saving time)". 2698# For now, let's assume that it's a temporary measure. 2699 2700# From Carlos A. Carnero Delgado (2005-11-12): 2701# This year (just like in 2004-2005) there's no change in time zone 2702# adjustment in Cuba. We will stay in daylight saving time: 2703# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 2704 2705# From Jesper Norgaard Welen (2006-10-21): 2706# An article in GRANMA INTERNACIONAL claims that Cuba will end 2707# the 3 years of permanent DST next weekend, see 2708# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 2709# "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 2710# watches should be set back one hour -- going back to 00:00 hours -- returning 2711# to the normal schedule.... 2712 2713# From Paul Eggert (2007-03-02): 2714# http://www.granma.cubaweb.cu/english/news/art89.html, dated yesterday, 2715# says Cuban clocks will advance at midnight on March 10. 2716# For lack of better information, assume Cuba will use US rules, 2717# except that it switches at midnight standard time as usual. 2718# 2719# From Steffen Thorsen (2007-10-25): 2720# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week 2721# earlier - on the last Sunday of October, just like in 2006. 2722# 2723# He supplied these references: 2724# 2725# http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES 2726# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm 2727# 2728# From Alex Kryvenishev (2007-10-25): 2729# Here is also article from Granma (Cuba): 2730# 2731# [Regira] el Horario Normal desde el [proximo] domingo 28 de octubre 2732# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html 2733# 2734# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html 2735 2736# From Arthur David Olson (2008-03-09): 2737# I'm in Maryland which is now observing United States Eastern Daylight 2738# Time. At 9:44 local time I used RealPlayer to listen to 2739# <a href="http://media.enet.cu/radioreloj"> 2740# http://media.enet.cu/radioreloj 2741# </a>, a Cuban information station, and heard 2742# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), 2743# indicating that Cuba is still on standard time. 2744 2745# From Steffen Thorsen (2008-03-12): 2746# It seems that Cuba will start DST on Sunday, 2007-03-16... 2747# It was announced yesterday, according to this source (in Spanish): 2748# <a href="http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm"> 2749# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm 2750# </a> 2751# 2752# Some more background information is posted here: 2753# <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html"> 2754# http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html 2755# </a> 2756# 2757# The article also says that Cuba has been observing DST since 1963, 2758# while Shanks (and tzdata) has 1965 as the first date (except in the 2759# 1940's). Many other web pages in Cuba also claim that it has been 2760# observed since 1963, but with the exception of 1970 - an exception 2761# which is not present in tzdata/Shanks. So there is a chance we need to 2762# change some historic records as well. 2763# 2764# One example: 2765# <a href="http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm"> 2766# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm 2767# </a> 2768 2769# From Jesper Norgaard Welen (2008-03-13): 2770# The Cuban time change has just been confirmed on the most authoritative 2771# web site, the Granma. Please check out 2772# <a href="http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html"> 2773# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html 2774# </a> 2775# 2776# Basically as expected after Steffen Thorsens information, the change 2777# will take place midnight between Saturday and Sunday. 2778 2779# From Arthur David Olson (2008-03-12): 2780# Assume Sun>=15 (third Sunday) going forward. 2781 2782# From Alexander Krivenyshev (2009-03-04) 2783# According to the Radio Reloj - Cuba will start Daylight Saving Time on 2784# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- 2785# not on midnight March 14 / March 15 as previously thought. 2786# 2787# <a href="http://www.worldtimezone.com/dst_news/dst_news_cuba05.html"> 2788# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html 2789# (in Spanish) 2790# </a> 2791 2792# From Arthur David Olson (2009-03-09) 2793# I listened over the Internet to 2794# <a href="http://media.enet.cu/readioreloj"> 2795# http://media.enet.cu/readioreloj 2796# </a> 2797# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the 2798# the time was announced as "diez cinco"--the same time as here, indicating 2799# that has indeed switched to DST. Assume second Sunday from 2009 forward. 2800 2801# From Steffen Thorsen (2011-03-08): 2802# Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00 2803# this year. Nothing about the end date known so far (if that has 2804# changed at all). 2805# 2806# Source: 2807# <a href="http://granma.co.cu/2011/03/08/nacional/artic01.html"> 2808# http://granma.co.cu/2011/03/08/nacional/artic01.html 2809# </a> 2810# 2811# Our info: 2812# <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html"> 2813# http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html 2814# </a> 2815# 2816# From Steffen Thorsen (2011-10-30) 2817# Cuba will end DST two weeks later this year. Instead of going back 2818# tonight, it has been delayed to 2011-11-13 at 01:00. 2819# 2820# One source (Spanish) 2821# <a href="http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html"> 2822# http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html 2823# </a> 2824# 2825# Our page: 2826# <a href="http://www.timeanddate.com/news/time/cuba-time-changes-2011.html"> 2827# http://www.timeanddate.com/news/time/cuba-time-changes-2011.html 2828# </a> 2829# 2830# From Steffen Thorsen (2012-03-01) 2831# According to Radio Reloj, Cuba will start DST on Midnight between March 2832# 31 and April 1. 2833# 2834# Radio Reloj has the following info (Spanish): 2835# <a href="http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril"> 2836# http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril 2837# </a> 2838# 2839# Our info on it: 2840# <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html"> 2841# http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html 2842# </a> 2843 2844# From Steffen Thorsen (2012-11-03): 2845# Radio Reloj and many other sources report that Cuba is changing back 2846# to standard time on 2012-11-04: 2847# http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre 2848# From Paul Eggert (2012-11-03): 2849# For now, assume the future rule is first Sunday in November. 2850 2851# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2852Rule Cuba 1928 only - Jun 10 0:00 1:00 D 2853Rule Cuba 1928 only - Oct 10 0:00 0 S 2854Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 2855Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 2856Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 2857Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 2858Rule Cuba 1965 only - Jun 1 0:00 1:00 D 2859Rule Cuba 1965 only - Sep 30 0:00 0 S 2860Rule Cuba 1966 only - May 29 0:00 1:00 D 2861Rule Cuba 1966 only - Oct 2 0:00 0 S 2862Rule Cuba 1967 only - Apr 8 0:00 1:00 D 2863Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 2864Rule Cuba 1968 only - Apr 14 0:00 1:00 D 2865Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 2866Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S 2867Rule Cuba 1972 1974 - Oct 8 0:00 0 S 2868Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S 2869Rule Cuba 1978 only - May 7 0:00 1:00 D 2870Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 2871Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 2872Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 2873Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 2874Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 2875Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 2876Rule Cuba 1996 only - Oct 6 0:00s 0 S 2877Rule Cuba 1997 only - Oct 12 0:00s 0 S 2878Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 2879Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 2880Rule Cuba 2000 2004 - Apr Sun>=1 0:00s 1:00 D 2881Rule Cuba 2006 2010 - Oct lastSun 0:00s 0 S 2882Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D 2883Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D 2884Rule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D 2885Rule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D 2886Rule Cuba 2011 only - Nov 13 0:00s 0 S 2887Rule Cuba 2012 only - Apr 1 0:00s 1:00 D 2888Rule Cuba 2012 max - Nov Sun>=1 0:00s 0 S 2889Rule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D 2890 2891# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2892Zone America/Havana -5:29:28 - LMT 1890 2893 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 2894 -5:00 Cuba C%sT 2895 2896# Dominica 2897# See 'southamerica'. 2898 2899# Dominican Republic 2900 2901# From Steffen Thorsen (2000-10-30): 2902# Enrique Morales reported to me that the Dominican Republic has changed the 2903# time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 2904# http://www.listin.com.do/antes/261000/republica/princi.html 2905 2906# From Paul Eggert (2000-12-04): 2907# That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 2908 2909# From Rives McDow (2000-12-01): 2910# Dominican Republic changed its mind and presidential decree on Tuesday, 2911# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 2912# Dominican Republic will be reverting to 8 hours from the International Date 2913# Line, and will not be using DST in the foreseeable future. The reason they 2914# decided to use DST was to be in synch with Puerto Rico, who was also going 2915# to implement DST. When Puerto Rico didn't implement DST, the president 2916# decided to revert. 2917 2918 2919# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2920Rule DR 1966 only - Oct 30 0:00 1:00 D 2921Rule DR 1967 only - Feb 28 0:00 0 S 2922Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 2923Rule DR 1970 only - Feb 21 0:00 0 S 2924Rule DR 1971 only - Jan 20 0:00 0 S 2925Rule DR 1972 1974 - Jan 21 0:00 0 S 2926# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2927Zone America/Santo_Domingo -4:39:36 - LMT 1890 2928 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 2929 -5:00 DR E%sT 1974 Oct 27 2930 -4:00 - AST 2000 Oct 29 02:00 2931 -5:00 US E%sT 2000 Dec 3 01:00 2932 -4:00 - AST 2933 2934# El Salvador 2935 2936# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2937Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 2938Rule Salv 1987 1988 - Sep lastSun 0:00 0 S 2939# There are too many San Salvadors elsewhere, so use America/El_Salvador 2940# instead of America/San_Salvador. 2941# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2942Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 2943 -6:00 Salv C%sT 2944 2945# Grenada 2946# Guadeloupe 2947# St Barthelemy 2948# St Martin (French part) 2949# See 'southamerica'. 2950 2951# Guatemala 2952# 2953# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 2954# Diario Co Latino, at 2955# http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079, 2956# says in an article dated 2006-04-19 that the Guatemalan government had 2957# decided on that date to advance official time by 60 minutes, to lessen the 2958# impact of the elevated cost of oil.... Daylight saving time will last from 2959# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 2960# From Paul Eggert (2006-06-22): 2961# The Ministry of Energy and Mines, press release CP-15/2006 2962# (2006-04-19), says DST ends at 24:00. See 2963# <http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf>. 2964 2965# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2966Rule Guat 1973 only - Nov 25 0:00 1:00 D 2967Rule Guat 1974 only - Feb 24 0:00 0 S 2968Rule Guat 1983 only - May 21 0:00 1:00 D 2969Rule Guat 1983 only - Sep 22 0:00 0 S 2970Rule Guat 1991 only - Mar 23 0:00 1:00 D 2971Rule Guat 1991 only - Sep 7 0:00 0 S 2972Rule Guat 2006 only - Apr 30 0:00 1:00 D 2973Rule Guat 2006 only - Oct 1 0:00 0 S 2974# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2975Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5 2976 -6:00 Guat C%sT 2977 2978# Haiti 2979# From Gwillim Law (2005-04-15): 2980# Risto O. Nykanen wrote me that Haiti is now on DST. 2981# I searched for confirmation, and I found a 2982# <a href="http://www.haitianconsulate.org/time.doc"> press release 2983# on the Web page of the Haitian Consulate in Chicago (2005-03-31), 2984# </a>. Translated from French, it says: 2985# 2986# "The Prime Minister's Communication Office notifies the public in general 2987# and the press in particular that, following a decision of the Interior 2988# Ministry and the Territorial Collectivities [I suppose that means the 2989# provinces], Haiti will move to Eastern Daylight Time in the night from next 2990# Saturday the 2nd to Sunday the 3rd. 2991# 2992# "Consequently, the Prime Minister's Communication Office wishes to inform 2993# the population that the country's clocks will be set forward one hour 2994# starting at midnight. This provision will hold until the last Saturday in 2995# October 2005. 2996# 2997# "Port-au-Prince, March 31, 2005" 2998# 2999# From Steffen Thorsen (2006-04-04): 3000# I have been informed by users that Haiti observes DST this year like 3001# last year, so the current "only" rule for 2005 might be changed to a 3002# "max" rule or to last until 2006. (Who knows if they will observe DST 3003# next year or if they will extend their DST like US/Canada next year). 3004# 3005# I have found this article about it (in French): 3006# http://www.haitipressnetwork.com/news.cfm?articleID=7612 3007# 3008# The reason seems to be an energy crisis. 3009 3010# From Stephen Colebourne (2007-02-22): 3011# Some IATA info: Haiti won't be having DST in 2007. 3012 3013# From Steffen Thorsen (2012-03-11): 3014# According to several news sources, Haiti will observe DST this year, 3015# apparently using the same start and end date as USA/Canada. 3016# So this means they have already changed their time. 3017# 3018# http://www.alterpresse.org/spip.php?article12510 3019# http://radiovision2000haiti.net/home/?p=13253 3020# 3021# From Arthur David Olson (2012-03-11): 3022# The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to 3023# 3:00 a.m. rather than the traditional Haitian jump at midnight. 3024# Assume a US-style fall back as well. 3025 3026# From Steffen Thorsen (2013-03-10): 3027# It appears that Haiti is observing DST this year as well, same rules 3028# as US/Canada. They did it last year as well, and it looks like they 3029# are going to observe DST every year now... 3030# 3031# http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/ 3032# http://www.canalplushaiti.net/?p=6714 3033 3034# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3035Rule Haiti 1983 only - May 8 0:00 1:00 D 3036Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 3037Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S 3038# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 3039# Go with IATA. 3040Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 3041Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 3042Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 3043Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S 3044Rule Haiti 2012 max - Mar Sun>=8 2:00 1:00 D 3045Rule Haiti 2012 max - Nov Sun>=1 2:00 0 S 3046# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3047Zone America/Port-au-Prince -4:49:20 - LMT 1890 3048 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 3049 -5:00 Haiti E%sT 3050 3051# Honduras 3052# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 3053 3054# From Paul Eggert (2006-05-05): 3055# worldtimezone.com reports a 2006-05-02 Spanish-language AP article 3056# saying Honduras will start using DST midnight Saturday, effective 4 3057# months until September. La Tribuna reported today 3058# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 3059# of Honduras, refused to back down on this. 3060 3061# From Jesper Norgaard Welen (2006-08-08): 3062# It seems that Honduras has returned from DST to standard time this Monday at 3063# 00:00 hours (prolonging Sunday to 25 hours duration). 3064# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html 3065 3066# From Paul Eggert (2006-08-08): 3067# Also see Diario El Heraldo, The country returns to standard time (2006-08-08) 3068# <http://www.elheraldo.hn/nota.php?nid=54941&sec=12>. 3069# It mentions executive decree 18-2006. 3070 3071# From Steffen Thorsen (2006-08-17): 3072# Honduras will observe DST from 2007 to 2009, exact dates are not 3073# published, I have located this authoritative source: 3074# http://www.presidencia.gob.hn/noticia.aspx?nId=47 3075 3076# From Steffen Thorsen (2007-03-30): 3077# http://www.laprensahn.com/pais_nota.php?id04962=7386 3078# So it seems that Honduras will not enter DST this year.... 3079 3080# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3081Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 3082Rule Hond 1987 1988 - Sep lastSun 0:00 0 S 3083Rule Hond 2006 only - May Sun>=1 0:00 1:00 D 3084Rule Hond 2006 only - Aug Mon>=1 0:00 0 S 3085# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3086Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 3087 -6:00 Hond C%sT 3088# 3089# Great Swan I ceded by US to Honduras in 1972 3090 3091# Jamaica 3092# Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an 3093# unspecified official document, and says "This time is used throughout the 3094# island". Go with Milne. Round to the nearest second as required by zic. 3095# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3096Zone America/Jamaica -5:07:11 - LMT 1890 # Kingston 3097 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3098 -5:00 - EST 1974 Apr 28 2:00 3099 -5:00 US E%sT 1984 3100 -5:00 - EST 3101 3102# Martinique 3103# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3104Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 3105 -4:04:20 - FFMT 1911 May # Fort-de-France MT 3106 -4:00 - AST 1980 Apr 6 3107 -4:00 1:00 ADT 1980 Sep 28 3108 -4:00 - AST 3109 3110# Montserrat 3111# See 'southamerica'. 3112 3113# Nicaragua 3114# 3115# This uses Shanks & Pottenger for times before 2005. 3116# 3117# From Steffen Thorsen (2005-04-12): 3118# I've got reports from 8 different people that Nicaragua just started 3119# DST on Sunday 2005-04-10, in order to save energy because of 3120# expensive petroleum. The exact end date for DST is not yet 3121# announced, only "September" but some sites also say "mid-September". 3122# Some background information is available on the President's official site: 3123# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 3124# The Decree, no 23-2005 is available here: 3125# 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 3126# 3127# From Paul Eggert (2005-05-01): 3128# The decree doesn't say anything about daylight saving, but for now let's 3129# assume that it is daylight saving.... 3130# 3131# From Gwillim Law (2005-04-21): 3132# The Associated Press story on the time change, which can be found at 3133# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 3134# and elsewhere, says (fifth paragraph, translated from Spanish): "The last 3135# time that a change of clocks was applied to save energy was in the year 2000 3136# during the Arnoldo Aleman administration."... 3137# The northamerica file says that Nicaragua has been on UTC-6 continuously 3138# since December 1998. I wasn't able to find any details of Nicaraguan time 3139# changes in 2000. Perhaps a note could be added to the northamerica file, to 3140# the effect that we have indirect evidence that DST was observed in 2000. 3141# 3142# From Jesper Norgaard Welen (2005-11-02): 3143# Nicaragua left DST the 2005-10-02 at 00:00 (local time). 3144# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 3145# (2005-09-26) 3146# 3147# From Jesper Norgaard Welen (2006-05-05): 3148# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 3149# (my informal translation) 3150# By order of the president of the republic, Enrique Bolanos, Nicaragua 3151# advanced by sixty minutes their official time, yesterday at 2 in the 3152# morning, and will stay that way until 30.th. of september. 3153# 3154# From Jesper Norgaard Welen (2006-09-30): 3155# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf 3156# My informal translation runs: 3157# The natural sun time is restored in all the national territory, in that the 3158# time is returned one hour at 01:00 am of October 1 of 2006. 3159# 3160# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3161Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 3162Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 3163Rule Nic 2005 only - Apr 10 0:00 1:00 D 3164Rule Nic 2005 only - Oct Sun>=1 0:00 0 S 3165Rule Nic 2006 only - Apr 30 2:00 1:00 D 3166Rule Nic 2006 only - Oct Sun>=1 1:00 0 S 3167# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3168Zone America/Managua -5:45:08 - LMT 1890 3169 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 3170 -6:00 - CST 1973 May 3171 -5:00 - EST 1975 Feb 16 3172 -6:00 Nic C%sT 1992 Jan 1 4:00 3173 -5:00 - EST 1992 Sep 24 3174 -6:00 - CST 1993 3175 -5:00 - EST 1997 3176 -6:00 Nic C%sT 3177 3178# Panama 3179# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3180Zone America/Panama -5:18:08 - LMT 1890 3181 -5:19:36 - CMT 1908 Apr 22 # Colon Mean Time 3182 -5:00 - EST 3183 3184# Puerto Rico 3185# There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'. 3186# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3187Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 3188 -4:00 - AST 1942 May 3 3189 -4:00 US A%sT 1946 3190 -4:00 - AST 3191 3192# St Kitts-Nevis 3193# St Lucia 3194# See 'southamerica'. 3195 3196# St Pierre and Miquelon 3197# There are too many St Pierres elsewhere, so we'll use 'Miquelon'. 3198# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3199Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 3200 -4:00 - AST 1980 May 3201 -3:00 - PMST 1987 # Pierre & Miquelon Time 3202 -3:00 Canada PM%sT 3203 3204# St Vincent and the Grenadines 3205# See 'southamerica'. 3206 3207# Turks and Caicos 3208# 3209# From Chris Dunn in 3210# <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007> 3211# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the 3212# daylight saving dates for time changes have been adjusted to match 3213# the recent U.S. change of dates. 3214# 3215# From Brian Inglis (2007-04-28): 3216# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 3217# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 3218# rows before that there is an out of date entry for Oct: 3219# "Eastern Standard Times Begins 2007 3220# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 3221# indicating that the normal ET rules are followed. 3222# 3223# From Paul Eggert (2006-05-01): 3224# Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998) 3225# says they switch at midnight. Go with Shanks & Pottenger. 3226# 3227# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3228Rule TC 1979 1986 - Apr lastSun 2:00 1:00 D 3229Rule TC 1979 2006 - Oct lastSun 2:00 0 S 3230Rule TC 1987 2006 - Apr Sun>=1 2:00 1:00 D 3231Rule TC 2007 max - Mar Sun>=8 2:00 1:00 D 3232Rule TC 2007 max - Nov Sun>=1 2:00 0 S 3233# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3234Zone America/Grand_Turk -4:44:32 - LMT 1890 3235 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3236 -5:00 TC E%sT 3237 3238# British Virgin Is 3239# Virgin Is 3240# See 'southamerica'. 3241