northamerica revision 13684:ab2ab8a6f54c
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# This file is in the public domain, so clarified as of 25# 2009-05-17 by Arthur David Olson. 26 27# also includes Central America and the Caribbean 28 29# This file is by no means authoritative; if you think you know better, 30# go ahead and edit the file (and please send any changes to 31# tz@iana.org for general use in the future). For more, please see 32# the file CONTRIBUTING in the tz distribution. 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, Ten years of daylight saving from the Pittsburgh standpoint 86# (Carnegie Library of Pittsburgh, 1927). 87# http://www.clpgh.org/exhibit/dst.html 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# 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# (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 lastSun 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 ... "Chamorro Standard Time" 254# for time in Guam and the Northern Marianas. See the file "australasia". 255# 256# From Paul Eggert (2015-04-17): 257# HST and HDT are standardized abbreviations for Hawaii-Aleutian 258# standard and daylight times. See section 9.47 (p 234) of the 259# U.S. Government Printing Office Style Manual (2008) 260# http://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf 261 262# From Arthur David Olson, 2005-08-09 263# The following was signed into law on 2005-08-08. 264# 265# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. 266# (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15 267# U.S.C. 260a(a)) is amended-- 268# (1) by striking "first Sunday of April" and inserting "second 269# Sunday of March"; and 270# (2) by striking "last Sunday of October" and inserting "first 271# Sunday of November'. 272# (b) Effective Date.--Subsection (a) shall take effect 1 year after the 273# date of enactment of this Act or March 1, 2007, whichever is later. 274# (c) Report to Congress.--Not later than 9 months after the effective 275# date stated in subsection (b), the Secretary shall report to Congress 276# on the impact of this section on energy consumption in the United 277# States. 278# (d) Right to Revert.--Congress retains the right to revert the 279# Daylight Saving Time back to the 2005 time schedules once the 280# Department study is complete. 281 282# US eastern time, represented by New York 283 284# Connecticut, Delaware, District of Columbia, most of Florida, 285# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky 286# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, 287# New Hampshire, New Jersey, New York, North Carolina, Ohio, 288# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 289# Vermont, Virginia, West Virginia 290 291# From Dave Cantor (2004-11-02): 292# Early this summer I had the occasion to visit the Mount Washington 293# Observatory weather station atop (of course!) Mount Washington [, NH].... 294# One of the staff members said that the station was on Eastern Standard Time 295# and didn't change their clocks for Daylight Saving ... so that their 296# reports will always have times which are 5 hours behind UTC. 297 298# From Paul Eggert (2005-08-26): 299# According to today's Huntsville Times 300# http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1 301# a few towns on Alabama's "eastern border with Georgia, such as Phenix City 302# in Russell County, Lanett in Chambers County and some towns in Lee County, 303# set their watches and clocks on Eastern time." It quotes H.H. "Bubba" 304# Roberts, city administrator in Phenix City. as saying "We are in the Central 305# time zone, but we do go by the Eastern time zone because so many people work 306# in Columbus." 307 308# From Paul Eggert (2014-09-06): 309# Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208 310# says that New York City Hall time was 3 minutes 58.4 seconds fast of 311# Eastern time (i.e., -4:56:01.6) just before the 1883 switch. Round to the 312# nearest second. 313 314# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 315Rule NYC 1920 only - Mar lastSun 2:00 1:00 D 316Rule NYC 1920 only - Oct lastSun 2:00 0 S 317Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 318Rule NYC 1921 1954 - Sep lastSun 2:00 0 S 319Rule NYC 1955 1966 - Oct lastSun 2:00 0 S 320# Zone NAME GMTOFF RULES FORMAT [UNTIL] 321Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 322 -5:00 US E%sT 1920 323 -5:00 NYC E%sT 1942 324 -5:00 US E%sT 1946 325 -5:00 NYC E%sT 1967 326 -5:00 US E%sT 327 328# US central time, represented by Chicago 329 330# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, 331# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and 332# Washington counties), Illinois, western Indiana 333# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 334# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 335# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 336# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 337# western Tennessee, most of Texas, Wisconsin 338 339# From Larry M. Smith (2006-04-26) re Wisconsin: 340# http://www.legis.state.wi.us/statutes/Stat0175.pdf ... 341# is currently enforced at the 01:00 time of change. Because the local 342# "bar time" in the state corresponds to 02:00, a number of citations 343# are issued for the "sale of class 'B' alcohol after prohibited 344# hours" within the deviated hour of this change every year.... 345# 346# From Douglas R. Bomberg (2007-03-12): 347# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI 348# Statue 175 closer in synch with the US Congress' intent.... 349# http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf 350 351# From an email administrator of the City of Fort Pierre, SD (2015-12-21): 352# Fort Pierre is technically located in the Mountain time zone as is 353# the rest of Stanley County. Most of Stanley County and Fort Pierre 354# uses the Central time zone due to doing most of their business in 355# Pierre so it simplifies schedules. I have lived in Stanley County 356# all my life and it has been that way since I can remember. (43 years!) 357# 358# From Paul Eggert (2015-12-25): 359# Assume this practice predates 1970, so Fort Pierre can use America/Chicago. 360 361# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 362Rule Chicago 1920 only - Jun 13 2:00 1:00 D 363Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S 364Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D 365Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 366Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S 367Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S 368# Zone NAME GMTOFF RULES FORMAT [UNTIL] 369Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 370 -6:00 US C%sT 1920 371 -6:00 Chicago C%sT 1936 Mar 1 2:00 372 -5:00 - EST 1936 Nov 15 2:00 373 -6:00 Chicago C%sT 1942 374 -6:00 US C%sT 1946 375 -6:00 Chicago C%sT 1967 376 -6:00 US C%sT 377# Oliver County, ND switched from mountain to central time on 1992-10-25. 378Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 379 -7:00 US M%sT 1992 Oct 25 2:00 380 -6:00 US C%sT 381# Morton County, ND, switched from mountain to central time on 382# 2003-10-26, except for the area around Mandan which was already central time. 383# See <http://dmses.dot.gov/docimages/p63/135818.pdf>. 384# Officially this switch also included part of Sioux County, and 385# Jones, Mellette, and Todd Counties in South Dakota; 386# but in practice these other counties were already observing central time. 387# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. 388Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 389 -7:00 US M%sT 2003 Oct 26 2:00 390 -6:00 US C%sT 391 392# From Josh Findley (2011-01-21): 393# ...it appears that Mercer County, North Dakota, changed from the 394# mountain time zone to the central time zone at the last transition from 395# daylight-saving to standard time (on Nov. 7, 2010): 396# http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm 397# http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html 398 399# From Andy Lipscomb (2011-01-24): 400# ...according to the Census Bureau, the largest city is Beulah (although 401# it's commonly referred to as Beulah-Hazen, with Hazen being the next 402# largest city in Mercer County). Google Maps places Beulah's city hall 403# at 47 degrees 15' 51" N, 101 degrees 46' 40" W, which yields an offset 404# of 6h47'07". 405 406Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53 407 -7:00 US M%sT 2010 Nov 7 2:00 408 -6:00 US C%sT 409 410# US mountain time, represented by Denver 411# 412# Colorado, far western Kansas, Montana, western 413# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 414# New Mexico, southwestern North Dakota, 415# western South Dakota, far western Texas (El Paso County, Hudspeth County, 416# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 417# 418# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 419Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 420Rule Denver 1920 only - Oct lastSun 2:00 0 S 421Rule Denver 1921 only - May 22 2:00 0 S 422Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 423Rule Denver 1965 1966 - Oct lastSun 2:00 0 S 424# Zone NAME GMTOFF RULES FORMAT [UNTIL] 425Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 426 -7:00 US M%sT 1920 427 -7:00 Denver M%sT 1942 428 -7:00 US M%sT 1946 429 -7:00 Denver M%sT 1967 430 -7:00 US M%sT 431 432# US Pacific time, represented by Los Angeles 433# 434# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 435# Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county 436# north of the Salmon River, and the towns of Burgdorf and Warren), 437# Nevada (except West Wendover), Oregon (except the northern 3/4 of 438# Malheur county), and Washington 439# 440# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 441Rule CA 1948 only - Mar 14 2:00 1:00 D 442Rule CA 1949 only - Jan 1 2:00 0 S 443Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D 444Rule CA 1950 1961 - Sep lastSun 2:00 0 S 445Rule CA 1962 1966 - Oct lastSun 2:00 0 S 446# Zone NAME GMTOFF RULES FORMAT [UNTIL] 447Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 448 -8:00 US P%sT 1946 449 -8:00 CA P%sT 1967 450 -8:00 US P%sT 451 452# Alaska 453# AK%sT is the modern abbreviation for -9:00 per USNO. 454# 455# From Paul Eggert (2001-05-30): 456# Howse writes that Alaska switched from the Julian to the Gregorian calendar, 457# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 458# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 459# also a Friday. Include only the time zone part of this transition, 460# ignoring the switch from Julian to Gregorian, since we can't represent 461# the Julian calendar. 462# 463# As far as we know, none of the exact locations mentioned below were 464# permanently inhabited in 1867 by anyone using either calendar. 465# (Yakutat was colonized by the Russians in 1799, but the settlement 466# was destroyed in 1805 by a Yakutat-kon war party.) However, there 467# were nearby inhabitants in some cases and for our purposes perhaps 468# it's best to simply use the official transition. 469 470# From Paul Eggert (2014-07-18): 471# One opinion of the early-1980s turmoil in Alaska over time zones and 472# daylight saving time appeared as graffiti on a Juneau airport wall: 473# "Welcome to Juneau. Please turn your watch back to the 19th century." 474# See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01. 475# http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html 476# 477# Steve Ferguson (2011-01-31) referred to the following source: 478# Norris F. Keeping time in Alaska: national directives, local response. 479# Alaska History 2001;16(1-2). 480# http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/ 481 482# From Arthur David Olson (2011-02-01): 483# Here's database-relevant material from the 2001 "Alaska History" article: 484# 485# On September 20 [1979]...DOT...officials decreed that on April 27, 486# 1980, Juneau and other nearby communities would move to Yukon Time. 487# Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on 488# Pacific Time. 489# 490# ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the 491# Department's September 1979 decision. Juneau and other communities in 492# northern Southeast reverted to Pacific Time on October 26. 493# 494# On October 28 [1983]...the Metlakatla Indian Community Council voted 495# unanimously to keep the reservation on Pacific Time. 496# 497# According to DOT official Joanne Petrie, Indian reservations are not 498# bound to follow time zones imposed by neighboring jurisdictions. 499# 500# (The last is consistent with how the database now handles the Navajo 501# Nation.) 502 503# From Arthur David Olson (2011-02-09): 504# I just spoke by phone with a staff member at the Metlakatla Indian 505# Community office (using contact information available at 506# http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla 507# It's shortly after 1:00 here on the east coast of the United States; 508# the staffer said it was shortly after 10:00 there. When I asked whether 509# that meant they were on Pacific time, they said no - they were on their 510# own time. I asked about daylight saving; they said it wasn't used. I 511# did not inquire about practices in the past. 512 513# From Arthur David Olson (2011-08-17): 514# For lack of better information, assume that Metlakatla's 515# abandonment of use of daylight saving resulted from the 1983 vote. 516 517# From Steffen Thorsen (2015-11-09): 518# It seems Metlakatla did go off PST on Sunday, November 1, changing 519# their time to AKST and are going to follow Alaska's DST, switching 520# between AKST and AKDT from now on.... 521# http://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/ 522 523# Zone NAME GMTOFF RULES FORMAT [UNTIL] 524Zone America/Juneau 15:02:19 - LMT 1867 Oct 18 525 -8:57:41 - LMT 1900 Aug 20 12:00 526 -8:00 - PST 1942 527 -8:00 US P%sT 1946 528 -8:00 - PST 1969 529 -8:00 US P%sT 1980 Apr 27 2:00 530 -9:00 US Y%sT 1980 Oct 26 2:00 531 -8:00 US P%sT 1983 Oct 30 2:00 532 -9:00 US Y%sT 1983 Nov 30 533 -9:00 US AK%sT 534Zone America/Sitka 14:58:47 - LMT 1867 Oct 18 535 -9:01:13 - LMT 1900 Aug 20 12:00 536 -8:00 - PST 1942 537 -8:00 US P%sT 1946 538 -8:00 - PST 1969 539 -8:00 US P%sT 1983 Oct 30 2:00 540 -9:00 US Y%sT 1983 Nov 30 541 -9:00 US AK%sT 542Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 18 543 -8:46:18 - LMT 1900 Aug 20 12:00 544 -8:00 - PST 1942 545 -8:00 US P%sT 1946 546 -8:00 - PST 1969 547 -8:00 US P%sT 1983 Oct 30 2:00 548 -8:00 - PST 2015 Nov 1 2:00 549 -9:00 US AK%sT 550Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 551 -9:18:55 - LMT 1900 Aug 20 12:00 552 -9:00 - YST 1942 553 -9:00 US Y%sT 1946 554 -9:00 - YST 1969 555 -9:00 US Y%sT 1983 Nov 30 556 -9:00 US AK%sT 557Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18 558 -9:59:36 - LMT 1900 Aug 20 12:00 559 -10:00 - CAT 1942 560 -10:00 US CAT/CAWT 1945 Aug 14 23:00u 561 -10:00 US CAT/CAPT 1946 # Peace 562 -10:00 - CAT 1967 Apr 563 -10:00 - AHST 1969 564 -10:00 US AH%sT 1983 Oct 30 2:00 565 -9:00 US Y%sT 1983 Nov 30 566 -9:00 US AK%sT 567Zone America/Nome 12:58:21 - LMT 1867 Oct 18 568 -11:01:38 - LMT 1900 Aug 20 12:00 569 -11:00 - NST 1942 570 -11:00 US N%sT 1946 571 -11:00 - NST 1967 Apr 572 -11:00 - BST 1969 573 -11:00 US B%sT 1983 Oct 30 2:00 574 -9:00 US Y%sT 1983 Nov 30 575 -9:00 US AK%sT 576Zone America/Adak 12:13:21 - LMT 1867 Oct 18 577 -11:46:38 - LMT 1900 Aug 20 12:00 578 -11:00 - NST 1942 579 -11:00 US N%sT 1946 580 -11:00 - NST 1967 Apr 581 -11:00 - BST 1969 582 -11:00 US B%sT 1983 Oct 30 2:00 583 -10:00 US AH%sT 1983 Nov 30 584 -10:00 US H%sT 585# The following switches don't quite make our 1970 cutoff. 586# 587# Shanks writes that part of southwest Alaska (e.g. Aniak) 588# switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 589# and another part (e.g. Akiak) made the same switch five weeks later. 590# 591# From David Flater (2004-11-09): 592# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 593# Historic Preservation Commission, provided this information, which 594# suggests that Unalaska deviated from statutory time from early 1967 595# possibly until 1983: 596# 597# Minutes of the Unalaska City Council Meeting, January 10, 1967: 598# "Except for St. Paul and Akutan, Unalaska is the only important 599# location not on Alaska Standard Time. The following resolution was 600# made by William Robinson and seconded by Henry Swanson: Be it 601# resolved that the City of Unalaska hereby goes to Alaska Standard 602# Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 603# January 14, Alaska Standard Time.) This resolution was passed with 604# three votes for and one against." 605 606# Hawaii 607 608# From Arthur David Olson (2010-12-09): 609# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 610# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, 611# the article is available at 612# http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf 613# and indicates that standard time was adopted effective noon, January 614# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight 615# saving for the period between the last Sunday of each April and the 616# last Sunday of each September, but less than a month later repealed the 617# act," (page 220), that year-round daylight saving time was in effect 618# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for 619# when clocks changed) and that clocks were changed by 30 minutes 620# effective the second Sunday of June, 1947 (page 219, with no time of 621# day given for when clocks changed). A footnote for the 1933 changes 622# cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) 623# and Act 163 (approved 21 May 1933)." 624 625# From Arthur David Olson (2011-01-19): 626# The following is from "Laws of the Territory of Hawaii Passed by the 627# Seventeenth Legislature: Regular Session 1933," available (as of 628# 2011-01-19) at American University's Pence Law Library. Page 85: "Act 629# 90...At 2 o'clock ante meridian of the last Sunday in April of each 630# year, the standard time of this Territory shall be advanced one 631# hour...This Act shall take effect upon its approval. Approved this 26th 632# day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of 633# Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is 634# hereby repealed...This Act shall take effect upon its approval, upon 635# which date the standard time of this Territory shall be restored to 636# that existing immediately prior to the taking effect of said Act 90. 637# Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor 638# of the Territory of Hawaii." 639# 640# Note that 1933-05-21 was a Sunday. 641# We're left to guess the time of day when Act 163 was approved; guess noon. 642 643# Zone NAME GMTOFF RULES FORMAT [UNTIL] 644Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 645 -10:30 - HST 1933 Apr 30 2:00 646 -10:30 1:00 HDT 1933 May 21 12:00 647 -10:30 - HST 1942 Feb 9 2:00 648 -10:30 1:00 HDT 1945 Sep 30 2:00 649 -10:30 - HST 1947 Jun 8 2:00 650 -10:00 - HST 651Link Pacific/Honolulu Pacific/Johnston 652 653# Now we turn to US areas that have diverged from the consensus since 1970. 654 655# Arizona mostly uses MST. 656 657# From Paul Eggert (2002-10-20): 658# 659# The information in the rest of this paragraph is derived from the 660# Daylight Saving Time web page 661# <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23) 662# maintained by the Arizona State Library, Archives and Public Records. 663# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 664# time, but by federal law railroads, airlines, bus lines, military 665# personnel, and some engaged in interstate commerce continued to 666# observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 667# Gazette says that was the date the law changed, and that 04-01 was 668# the date the state's clocks would change. In 1945 the State of 669# Arizona used standard time all year, again with exceptions only as 670# mandated by federal law. Arizona observed DST in 1967, but Arizona 671# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 672# 673# Shanks says the 1944 experiment came to an end on 1944-03-17. 674# Go with the Arizona State Library instead. 675 676# Zone NAME GMTOFF RULES FORMAT [UNTIL] 677Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 678 -7:00 US M%sT 1944 Jan 1 0:01 679 -7:00 - MST 1944 Apr 1 0:01 680 -7:00 US M%sT 1944 Oct 1 0:01 681 -7:00 - MST 1967 682 -7:00 US M%sT 1968 Mar 21 683 -7:00 - MST 684# From Arthur David Olson (1988-02-13): 685# A writer from the Inter Tribal Council of Arizona, Inc., 686# notes in private correspondence dated 1987-12-28 that "Presently, only the 687# Navajo Nation participates in the Daylight Saving Time policy, due to its 688# large size and location in three states." (The "only" means that other 689# tribal nations don't use DST.) 690# 691# From Paul Eggert (2013-08-26): 692# See America/Denver for a zone appropriate for the Navajo Nation. 693 694# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 695# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 696# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 697# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 698# Teton, Twin Falls, Valley, Washington counties, and the southern 699# quarter of Idaho county) and eastern Oregon (most of Malheur County) 700# switched four weeks late in 1974. 701# 702# Zone NAME GMTOFF RULES FORMAT [UNTIL] 703Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 704 -8:00 US P%sT 1923 May 13 2:00 705 -7:00 US M%sT 1974 706 -7:00 - MST 1974 Feb 3 2:00 707 -7:00 US M%sT 708 709# Indiana 710# 711# For a map of Indiana's time zone regions, see: 712# http://en.wikipedia.org/wiki/Time_in_Indiana 713# 714# From Paul Eggert (2007-08-17): 715# Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 716# with the following exceptions: 717# 718# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 719# Vanderburgh, and Warrick counties have been like America/Chicago. 720# 721# - Dearborn and Ohio counties have been like America/New_York. 722# 723# - Clark, Floyd, and Harrison counties have been like 724# America/Kentucky/Louisville. 725# 726# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, 727# and Switzerland counties have their own time zone histories as noted below. 728# 729# Shanks partitioned Indiana into 345 regions, each with its own time history, 730# and wrote "Even newspaper reports present contradictory information." 731# Those Hoosiers! Such a flighty and changeable people! 732# Fortunately, most of the complexity occurred before our cutoff date of 1970. 733# 734# Other than Indianapolis, the Indiana place names are so nondescript 735# that they would be ambiguous if we left them at the 'America' level. 736# So we reluctantly put them all in a subdirectory 'America/Indiana'. 737 738# From Paul Eggert (2014-06-26): 739# https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana 740# says "DOT is relocating the time zone boundary in Indiana to move Starke, 741# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 742# Eastern Time Zone to the Central Time Zone.... The effective date of 743# this rule is 2 a.m. EST Sunday, April 2, 2006, which is the 744# changeover date from standard time to Daylight Saving Time." 745# Strictly speaking, this meant the affected counties changed their 746# clocks twice that night, but this obviously was in error. The intent 747# was that 01:59:59 EST be followed by 02:00:00 CDT. 748 749# From Gwillim Law (2007-02-10): 750# The Associated Press has been reporting that Pulaski County, Indiana is 751# going to switch from Central to Eastern Time on March 11, 2007.... 752# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 753 754# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 755Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D 756Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 757Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 758# Zone NAME GMTOFF RULES FORMAT [UNTIL] 759Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 760 -6:00 US C%sT 1920 761 -6:00 Indianapolis C%sT 1942 762 -6:00 US C%sT 1946 763 -6:00 Indianapolis C%sT 1955 Apr 24 2:00 764 -5:00 - EST 1957 Sep 29 2:00 765 -6:00 - CST 1958 Apr 27 2:00 766 -5:00 - EST 1969 767 -5:00 US E%sT 1971 768 -5:00 - EST 2006 769 -5:00 US E%sT 770# 771# Eastern Crawford County, Indiana, left its clocks alone in 1974, 772# as well as from 1976 through 2005. 773# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 774Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D 775Rule Marengo 1951 only - Sep lastSun 2:00 0 S 776Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 777Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S 778# Zone NAME GMTOFF RULES FORMAT [UNTIL] 779Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 780 -6:00 US C%sT 1951 781 -6:00 Marengo C%sT 1961 Apr 30 2:00 782 -5:00 - EST 1969 783 -5:00 US E%sT 1974 Jan 6 2:00 784 -6:00 1:00 CDT 1974 Oct 27 2:00 785 -5:00 US E%sT 1976 786 -5:00 - EST 2006 787 -5:00 US E%sT 788# 789# Daviess, Dubois, Knox, and Martin Counties, Indiana, 790# switched from eastern to central time in April 2006, then switched back 791# in November 2007. 792# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 793Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 794Rule Vincennes 1946 only - Sep lastSun 2:00 0 S 795Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 796Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 797Rule Vincennes 1955 only - May 1 0:00 1:00 D 798Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 799Rule Vincennes 1960 only - Oct lastSun 2:00 0 S 800Rule Vincennes 1961 only - Sep lastSun 2:00 0 S 801Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 802# Zone NAME GMTOFF RULES FORMAT [UNTIL] 803Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 804 -6:00 US C%sT 1946 805 -6:00 Vincennes C%sT 1964 Apr 26 2:00 806 -5:00 - EST 1969 807 -5:00 US E%sT 1971 808 -5:00 - EST 2006 Apr 2 2:00 809 -6:00 US C%sT 2007 Nov 4 2:00 810 -5:00 US E%sT 811# 812# Perry County, Indiana, switched from eastern to central time in April 2006. 813# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 814Rule Perry 1946 only - Apr lastSun 2:00 1:00 D 815Rule Perry 1946 only - Sep lastSun 2:00 0 S 816Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D 817Rule Perry 1953 1959 - Sep lastSun 2:00 0 S 818Rule Perry 1955 only - May 1 0:00 1:00 D 819Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D 820Rule Perry 1960 only - Oct lastSun 2:00 0 S 821Rule Perry 1961 only - Sep lastSun 2:00 0 S 822Rule Perry 1962 1963 - Oct lastSun 2:00 0 S 823# Zone NAME GMTOFF RULES FORMAT [UNTIL] 824Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 825 -6:00 US C%sT 1946 826 -6:00 Perry C%sT 1964 Apr 26 2:00 827 -5:00 - EST 1969 828 -5:00 US E%sT 1971 829 -5:00 - EST 2006 Apr 2 2:00 830 -6:00 US C%sT 831# 832# Pike County, Indiana moved from central to eastern time in 1977, 833# then switched back in 2006, then switched back again in 2007. 834# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 835Rule Pike 1955 only - May 1 0:00 1:00 D 836Rule Pike 1955 1960 - Sep lastSun 2:00 0 S 837Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 838Rule Pike 1961 1964 - Oct lastSun 2:00 0 S 839# Zone NAME GMTOFF RULES FORMAT [UNTIL] 840Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 841 -6:00 US C%sT 1955 842 -6:00 Pike C%sT 1965 Apr 25 2:00 843 -5:00 - EST 1966 Oct 30 2:00 844 -6:00 US C%sT 1977 Oct 30 2:00 845 -5:00 - EST 2006 Apr 2 2:00 846 -6:00 US C%sT 2007 Nov 4 2:00 847 -5:00 US E%sT 848# 849# Starke County, Indiana moved from central to eastern time in 1991, 850# then switched back in 2006. 851# From Arthur David Olson (1991-10-28): 852# An article on page A3 of the Sunday, 1991-10-27 Washington Post 853# notes that Starke County switched from Central time to Eastern time as of 854# 1991-10-27. 855# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 856Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 857Rule Starke 1947 1954 - Sep lastSun 2:00 0 S 858Rule Starke 1955 1956 - Oct lastSun 2:00 0 S 859Rule Starke 1957 1958 - Sep lastSun 2:00 0 S 860Rule Starke 1959 1961 - Oct lastSun 2:00 0 S 861# Zone NAME GMTOFF RULES FORMAT [UNTIL] 862Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 863 -6:00 US C%sT 1947 864 -6:00 Starke C%sT 1962 Apr 29 2:00 865 -5:00 - EST 1963 Oct 27 2:00 866 -6:00 US C%sT 1991 Oct 27 2:00 867 -5:00 - EST 2006 Apr 2 2:00 868 -6:00 US C%sT 869# 870# Pulaski County, Indiana, switched from eastern to central time in 871# April 2006 and then switched back in March 2007. 872# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 873Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 874Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 875Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 876Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 877# Zone NAME GMTOFF RULES FORMAT [UNTIL] 878Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 879 -6:00 US C%sT 1946 880 -6:00 Pulaski C%sT 1961 Apr 30 2:00 881 -5:00 - EST 1969 882 -5:00 US E%sT 1971 883 -5:00 - EST 2006 Apr 2 2:00 884 -6:00 US C%sT 2007 Mar 11 2:00 885 -5:00 US E%sT 886# 887# Switzerland County, Indiana, did not observe DST from 1973 through 2005. 888# Zone NAME GMTOFF RULES FORMAT [UNTIL] 889Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 890 -6:00 US C%sT 1954 Apr 25 2:00 891 -5:00 - EST 1969 892 -5:00 US E%sT 1973 893 -5:00 - EST 2006 894 -5:00 US E%sT 895 896# Part of Kentucky left its clocks alone in 1974. 897# This also includes Clark, Floyd, and Harrison counties in Indiana. 898# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 899Rule Louisville 1921 only - May 1 2:00 1:00 D 900Rule Louisville 1921 only - Sep 1 2:00 0 S 901Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 902Rule Louisville 1941 only - Sep lastSun 2:00 0 S 903Rule Louisville 1946 only - Jun 2 2:00 0 S 904Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S 905Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S 906# Zone NAME GMTOFF RULES FORMAT [UNTIL] 907Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 908 -6:00 US C%sT 1921 909 -6:00 Louisville C%sT 1942 910 -6:00 US C%sT 1946 911 -6:00 Louisville C%sT 1961 Jul 23 2:00 912 -5:00 - EST 1968 913 -5:00 US E%sT 1974 Jan 6 2:00 914 -6:00 1:00 CDT 1974 Oct 27 2:00 915 -5:00 US E%sT 916# 917# Wayne County, Kentucky 918# 919# From Lake Cumberland LIFE 920# http://www.lake-cumberland.com/life/archive/news990129time.shtml 921# (1999-01-29) via WKYM-101.7: 922# Clinton County has joined Wayne County in asking the DoT to change from 923# the Central to the Eastern time zone.... The Wayne County government made 924# the same request in December. And while Russell County officials have not 925# taken action, the majority of respondents to a poll conducted there in 926# August indicated they would like to change to "fast time" also. 927# The three Lake Cumberland counties are the farthest east of any U.S. 928# location in the Central time zone. 929# 930# From Rich Wales (2000-08-29): 931# After prolonged debate, and despite continuing deep differences of opinion, 932# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 933# (-0500) time. They won't "fall back" this year. See Sara Shipley, 934# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 935# 936# From Paul Eggert (2001-07-16): 937# The final rule was published in the 938# Federal Register 65, 160 (2000-08-17), pp 50154-50158. 939# http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22 940# 941Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 942 -6:00 US C%sT 1946 943 -6:00 - CST 1968 944 -6:00 US C%sT 2000 Oct 29 2:00 945 -5:00 US E%sT 946 947 948# From Rives McDow (2000-08-30): 949# Here ... are all the changes in the US since 1985. 950# Kearny County, KS (put all of county on central; 951# previously split between MST and CST) ... 1990-10 952# Starke County, IN (from CST to EST) ... 1991-10 953# Oliver County, ND (from MST to CST) ... 1992-10 954# West Wendover, NV (from PST TO MST) ... 1999-10 955# Wayne County, KY (from CST to EST) ... 2000-10 956# 957# From Paul Eggert (2001-07-17): 958# We don't know where the line used to be within Kearny County, KS, 959# so omit that change for now. 960# See America/Indiana/Knox for the Starke County, IN change. 961# See America/North_Dakota/Center for the Oliver County, ND change. 962# West Wendover, NV officially switched from Pacific to mountain time on 963# 1999-10-31. See the 964# Federal Register 64, 203 (1999-10-21), pp 56705-56707. 965# http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15 966# However, the Federal Register says that West Wendover already operated 967# on mountain time, and the rule merely made this official; 968# hence a separate tz entry is not needed. 969 970# Michigan 971# 972# From Bob Devine (1988-01-28): 973# Michigan didn't observe DST from 1968 to 1973. 974# 975# From Paul Eggert (1999-03-31): 976# Shanks writes that Michigan started using standard time on 1885-09-18, 977# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 978# that Detroit kept 979# 980# local time until 1900 when the City Council decreed that clocks should 981# be put back twenty-eight minutes to Central Standard Time. Half the 982# city obeyed, half refused. After considerable debate, the decision 983# was rescinded and the city reverted to Sun time. A derisive offer to 984# erect a sundial in front of the city hall was referred to the 985# Committee on Sewers. Then, in 1905, Central time was adopted 986# by city vote. 987# 988# This story is too entertaining to be false, so go with Howse over Shanks. 989# 990# From Paul Eggert (2001-03-06): 991# Garland (1927) writes "Cleveland and Detroit advanced their clocks 992# one hour in 1914." This change is not in Shanks. We have no more 993# info, so omit this for now. 994# 995# Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 996# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 997Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D 998Rule Detroit 1948 only - Sep lastSun 2:00 0 S 999Rule Detroit 1967 only - Jun 14 2:00 1:00 D 1000Rule Detroit 1967 only - Oct lastSun 2:00 0 S 1001# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1002Zone America/Detroit -5:32:11 - LMT 1905 1003 -6:00 - CST 1915 May 15 2:00 1004 -5:00 - EST 1942 1005 -5:00 US E%sT 1946 1006 -5:00 Detroit E%sT 1973 1007 -5:00 US E%sT 1975 1008 -5:00 - EST 1975 Apr 27 2:00 1009 -5:00 US E%sT 1010# 1011# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 1012# switched from EST to CST/CDT in 1973. 1013# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 1014Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D 1015Rule Menominee 1946 only - Sep lastSun 2:00 0 S 1016Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D 1017Rule Menominee 1966 only - Oct lastSun 2:00 0 S 1018# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1019Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 1020 -6:00 US C%sT 1946 1021 -6:00 Menominee C%sT 1969 Apr 27 2:00 1022 -5:00 - EST 1973 Apr 29 2:00 1023 -6:00 US C%sT 1024 1025# Navassa 1026# administered by the US Fish and Wildlife Service 1027# claimed by US under the provisions of the 1856 Guano Islands Act 1028# also claimed by Haiti 1029# occupied 1857/1900 by the Navassa Phosphate Co 1030# US lighthouse 1917/1996-09 1031# currently uninhabited 1032# see Mark Fineman, "An Isle Rich in Guano and Discord", 1033# _Los Angeles Times_ (1998-11-10), A1, A10; it cites 1034# Jimmy Skaggs, _The Great Guano Rush_ (1994). 1035 1036################################################################################ 1037 1038 1039# From Paul Eggert (2014-10-31): 1040# 1041# Unless otherwise specified, the source for data through 1990 is: 1042# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 1043# San Diego: ACS Publications, Inc. (2003). 1044# Unfortunately this book contains many errors and cites no sources. 1045# 1046# Gwillim Law writes that a good source 1047# for recent time zone data is the International Air Transport 1048# Association's Standard Schedules Information Manual (IATA SSIM), 1049# published semiannually. Law sent in several helpful summaries 1050# of the IATA's data after 1990. Except where otherwise noted, 1051# IATA SSIM is the source for entries after 1990. 1052# 1053# Other sources occasionally used include: 1054# 1055# Edward W. Whitman, World Time Differences, 1056# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 1057# which I found in the UCLA library. 1058# 1059# William Willett, The Waste of Daylight, 19th edition 1060# <http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf> 1061# [PDF] (1914-03) 1062# 1063# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 1064# <http://www.jstor.org/stable/1774359>. 1065# 1066# See the 'europe' file for Greenland. 1067 1068# Canada 1069 1070# From Alain LaBont�� (1994-11-14): 1071# I post here the time zone abbreviations standardized in Canada 1072# for both English and French in the CAN/CSA-Z234.4-89 standard.... 1073# 1074# UTC Standard time Daylight saving time 1075# offset French English French English 1076# -2:30 - - HAT NDT 1077# -3 - - HAA ADT 1078# -3:30 HNT NST - - 1079# -4 HNA AST HAE EDT 1080# -5 HNE EST HAC CDT 1081# -6 HNC CST HAR MDT 1082# -7 HNR MST HAP PDT 1083# -8 HNP PST HAY YDT 1084# -9 HNY YST - - 1085# 1086# HN: Heure Normale ST: Standard Time 1087# HA: Heure Avanc��e DT: Daylight saving Time 1088# 1089# A: de l'Atlantique Atlantic 1090# C: du Centre Central 1091# E: de l'Est Eastern 1092# M: Mountain 1093# N: Newfoundland 1094# P: du Pacifique Pacific 1095# R: des Rocheuses 1096# T: de Terre-Neuve 1097# Y: du Yukon Yukon 1098# 1099# From Paul Eggert (1994-11-22): 1100# Alas, this sort of thing must be handled by localization software. 1101 1102# Unless otherwise specified, the data entries for Canada are all from Shanks 1103# & Pottenger. 1104 1105# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 1106# 2007-03-01): 1107# The British Columbia government announced yesterday that it will 1108# adjust daylight savings next year to align with changes in the 1109# U.S. and the rest of Canada.... 1110# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm 1111# ... 1112# Nova Scotia 1113# Daylight saving time will be extended by four weeks starting in 2007.... 1114# http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf 1115# 1116# [For New Brunswick] the new legislation dictates that the time change is to 1117# be done at 02:00 instead of 00:01. 1118# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 1119# ... 1120# Manitoba has traditionally changed the clock every fall at 03:00. 1121# As of 2006, the transition is to take place one hour earlier at 02:00. 1122# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 1123# ... 1124# [Alberta, Ontario, Quebec] will follow US rules. 1125# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 1126# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 1127# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 1128# ... 1129# P.E.I. will follow US rules.... 1130# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 1131# ... 1132# Province of Newfoundland and Labrador.... 1133# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 1134# ... 1135# Yukon 1136# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 1137# ... 1138# N.W.T. will follow US rules. Whoever maintains the government web site 1139# does not seem to believe in bookmarks. To see the news release, click the 1140# following link and search for "Daylight Savings Time Change". Press the 1141# "Daylight Savings Time Change" link; it will fire off a popup using 1142# JavaScript. 1143# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 1144# ... 1145# Nunavut 1146# An amendment to the Interpretation Act was registered on February 19/2007.... 1147# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 1148 1149# From Paul Eggert (2014-10-18): 1150# H. David Matthews and Mary Vincent's map 1151# "It's about TIME", _Canadian Geographic_ (September-October 1998) 1152# http://www.canadiangeographic.ca/Magazine/SO98/alacarte.asp 1153# contains detailed boundaries for regions observing nonstandard 1154# time and daylight saving time arrangements in Canada circa 1998. 1155# 1156# National Research Council Canada maintains info about time zones and DST. 1157# http://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html 1158# http://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5 1159# Its unofficial information is often taken from Matthews and Vincent. 1160 1161# From Paul Eggert (2006-06-27): 1162# For now, assume all of DST-observing Canada will fall into line with the 1163# new US DST rules, 1164 1165# From Chris Walton (2011-12-01) 1166# In the first of Tammy Hardwick's articles 1167# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1168# she quotes the Friday November 1/1918 edition of the Creston Review. 1169# The quote includes these two statements: 1170# 'Sunday the CPR went back to the old system of time...' 1171# '... The daylight saving scheme was dropped all over Canada at the same time,' 1172# These statements refer to a transition from daylight time to standard time 1173# that occurred nationally on Sunday October 27/1918. This transition was 1174# also documented in the Saturday October 26/1918 edition of the Toronto Star. 1175 1176# In light of that evidence, we alter the date from the earlier believed 1177# Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day 1178# than Thursday) in all Canadian rulesets. 1179 1180# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1181Rule Canada 1918 only - Apr 14 2:00 1:00 D 1182Rule Canada 1918 only - Oct 27 2:00 0 S 1183Rule Canada 1942 only - Feb 9 2:00 1:00 W # War 1184Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 1185Rule Canada 1945 only - Sep 30 2:00 0 S 1186Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 1187Rule Canada 1974 2006 - Oct lastSun 2:00 0 S 1188Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 1189Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 1190Rule Canada 2007 max - Nov Sun>=1 2:00 0 S 1191 1192 1193# Newfoundland and Labrador 1194 1195# From Paul Eggert (2000-10-02): 1196# Matthews and Vincent (1998) write that Labrador should use NST/NDT, 1197# but the only part of Labrador that follows the rules is the 1198# southeast corner, including Port Hope Simpson and Mary's Harbour, 1199# but excluding, say, Black Tickle. 1200 1201# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1202Rule StJohns 1917 only - Apr 8 2:00 1:00 D 1203Rule StJohns 1917 only - Sep 17 2:00 0 S 1204# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 1205Rule StJohns 1919 only - May 5 23:00 1:00 D 1206Rule StJohns 1919 only - Aug 12 23:00 0 S 1207# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 1208Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 1209Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S 1210# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 1211# Pottenger. 1212Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 1213Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 1214# Whitman gives the following transitions: 1215# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 1216# but go with Shanks & Pottenger and assume they used Canadian rules. 1217# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 1218# Apr 30 - Sep 24; go with Shanks & Pottenger. 1219Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 1220Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 1221Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 1222Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S 1223Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S 1224# From Paul Eggert (2000-10-02): 1225# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 1226# at 00:01 local time. For now, assume it started in 1987. 1227 1228# From Michael Pelley (2011-09-12): 1229# We received today, Monday, September 12, 2011, notification that the 1230# changes to the Newfoundland Standard Time Act have been proclaimed. 1231# The change in the Act stipulates that the change from Daylight Savings 1232# Time to Standard Time and from Standard Time to Daylight Savings Time 1233# now occurs at 2:00AM. 1234# ... 1235# http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm 1236# ... 1237# MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery 1238# Office of the Chief Information Officer 1239# Executive Council 1240# Government of Newfoundland & Labrador 1241 1242Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 1243Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S 1244Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 1245Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1246Rule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D 1247Rule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S 1248# 1249# St John's has an apostrophe, but Posix file names can't have apostrophes. 1250# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1251Zone America/St_Johns -3:30:52 - LMT 1884 1252 -3:30:52 StJohns N%sT 1918 1253 -3:30:52 Canada N%sT 1919 1254 -3:30:52 StJohns N%sT 1935 Mar 30 1255 -3:30 StJohns N%sT 1942 May 11 1256 -3:30 Canada N%sT 1946 1257 -3:30 StJohns N%sT 2011 Nov 1258 -3:30 Canada N%sT 1259 1260# most of east Labrador 1261 1262# The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'. 1263# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1264Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 1265 -3:30:52 - NST 1918 1266 -3:30:52 Canada N%sT 1919 1267 -3:30:52 - NST 1935 Mar 30 1268 -3:30 - NST 1936 1269 -3:30 StJohns N%sT 1942 May 11 1270 -3:30 Canada N%sT 1946 1271 -3:30 StJohns N%sT 1966 Mar 15 2:00 1272 -4:00 StJohns A%sT 2011 Nov 1273 -4:00 Canada A%sT 1274 1275 1276# west Labrador, Nova Scotia, Prince Edward I 1277 1278# From Brian Inglis (2015-07-20): 1279# From the historical weather station records available at: 1280# https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada 1281# Sydney shares the same time history as Glace Bay, so was 1282# likely to be the same across the island.... 1283# Sydney, as the capital and most populous location, or Cape Breton, would 1284# have been better names for the zone had we known this in 1996. 1285 1286# From Paul Eggert (2015-07-20): 1287# Shanks & Pottenger write that since 1970 most of this region has been like 1288# Halifax. Many locales did not observe peacetime DST until 1972; 1289# the Cape Breton area, represented by Glace Bay, is the largest we know of 1290# (Glace Bay was perhaps not the best name choice but no point changing now). 1291# Shanks & Pottenger also write that Liverpool, NS was the only town 1292# in Canada to observe DST in 1971 but not 1970; for now we'll assume 1293# this is a typo. 1294 1295# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1296Rule Halifax 1916 only - Apr 1 0:00 1:00 D 1297Rule Halifax 1916 only - Oct 1 0:00 0 S 1298Rule Halifax 1920 only - May 9 0:00 1:00 D 1299Rule Halifax 1920 only - Aug 29 0:00 0 S 1300Rule Halifax 1921 only - May 6 0:00 1:00 D 1301Rule Halifax 1921 1922 - Sep 5 0:00 0 S 1302Rule Halifax 1922 only - Apr 30 0:00 1:00 D 1303Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1304Rule Halifax 1923 only - Sep 4 0:00 0 S 1305Rule Halifax 1924 only - Sep 15 0:00 0 S 1306Rule Halifax 1925 only - Sep 28 0:00 0 S 1307Rule Halifax 1926 only - May 16 0:00 1:00 D 1308Rule Halifax 1926 only - Sep 13 0:00 0 S 1309Rule Halifax 1927 only - May 1 0:00 1:00 D 1310Rule Halifax 1927 only - Sep 26 0:00 0 S 1311Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1312Rule Halifax 1928 only - Sep 9 0:00 0 S 1313Rule Halifax 1929 only - Sep 3 0:00 0 S 1314Rule Halifax 1930 only - Sep 15 0:00 0 S 1315Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1316Rule Halifax 1932 only - May 1 0:00 1:00 D 1317Rule Halifax 1933 only - Apr 30 0:00 1:00 D 1318Rule Halifax 1933 only - Oct 2 0:00 0 S 1319Rule Halifax 1934 only - May 20 0:00 1:00 D 1320Rule Halifax 1934 only - Sep 16 0:00 0 S 1321Rule Halifax 1935 only - Jun 2 0:00 1:00 D 1322Rule Halifax 1935 only - Sep 30 0:00 0 S 1323Rule Halifax 1936 only - Jun 1 0:00 1:00 D 1324Rule Halifax 1936 only - Sep 14 0:00 0 S 1325Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1326Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1327Rule Halifax 1939 only - May 28 0:00 1:00 D 1328Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1329Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1330Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1331Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1332Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1333Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1334Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1335Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1336Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S 1337# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1338Zone America/Halifax -4:14:24 - LMT 1902 Jun 15 1339 -4:00 Halifax A%sT 1918 1340 -4:00 Canada A%sT 1919 1341 -4:00 Halifax A%sT 1942 Feb 9 2:00s 1342 -4:00 Canada A%sT 1946 1343 -4:00 Halifax A%sT 1974 1344 -4:00 Canada A%sT 1345Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 1346 -4:00 Canada A%sT 1953 1347 -4:00 Halifax A%sT 1954 1348 -4:00 - AST 1972 1349 -4:00 Halifax A%sT 1974 1350 -4:00 Canada A%sT 1351 1352# New Brunswick 1353 1354# From Paul Eggert (2007-01-31): 1355# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 1356# says they changed at 00:01 through 2006, and 1357# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1358# clear that this was the case since at least 1993. 1359# For now, assume it started in 1993. 1360 1361# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1362Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1363Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1364Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1365Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1366Rule Moncton 1939 only - May 27 1:00 1:00 D 1367Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1368Rule Moncton 1940 only - May 19 1:00 1:00 D 1369Rule Moncton 1941 only - May 4 1:00 1:00 D 1370Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1371Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1372Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1373Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1374Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1375# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1376Zone America/Moncton -4:19:08 - LMT 1883 Dec 9 1377 -5:00 - EST 1902 Jun 15 1378 -4:00 Canada A%sT 1933 1379 -4:00 Moncton A%sT 1942 1380 -4:00 Canada A%sT 1946 1381 -4:00 Moncton A%sT 1973 1382 -4:00 Canada A%sT 1993 1383 -4:00 Moncton A%sT 2007 1384 -4:00 Canada A%sT 1385 1386# Quebec 1387 1388# From Paul Eggert (2015-03-24): 1389# See America/Toronto for most of Quebec, including Montreal. 1390# 1391# Matthews and Vincent (1998) also write that Quebec east of the -63 1392# meridian is supposed to observe AST, but residents as far east as 1393# Natashquan use EST/EDT, and residents east of Natashquan use AST. 1394# The Quebec department of justice writes in 1395# "The situation in Minganie and Basse-C��te-Nord" 1396# http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm 1397# that the coastal strip from just east of Natashquan to Blanc-Sablon 1398# observes Atlantic standard time all year round. 1399# http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en 1400# says this common practice was codified into law as of 2007. 1401# For lack of better info, guess this practice began around 1970, contra to 1402# Shanks & Pottenger who have this region observing AST/ADT. 1403 1404# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1405Zone America/Blanc-Sablon -3:48:28 - LMT 1884 1406 -4:00 Canada A%sT 1970 1407 -4:00 - AST 1408 1409# Ontario 1410 1411# From Paul Eggert (2006-07-09): 1412# Shanks & Pottenger write that since 1970 most of Ontario has been like 1413# Toronto. 1414# Thunder Bay skipped DST in 1973. 1415# Many smaller locales did not observe peacetime DST until 1974; 1416# Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1417# Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 1418 1419# From Mark Brader (2003-07-26): 1420# [According to the Toronto Star] Orillia, Ontario, adopted DST 1421# effective Saturday, 1912-06-22, 22:00; the article mentions that 1422# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1423# have already done so. In Orillia DST was to run until Saturday, 1424# 1912-08-31 (no time mentioned), but it was met with considerable 1425# hostility from certain segments of the public, and was revoked after 1426# only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but 1427# presumably that should be -07-06. (1912-06-19, -07-12; also letters 1428# earlier in June). 1429# 1430# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1431 1432# From Paul Eggert (1997-10-17): 1433# Mark Brader writes that an article in the 1997-10-14 Toronto Star 1434# says that Atikokan, Ontario currently does not observe DST, 1435# but will vote on 11-10 whether to use EST/EDT. 1436# He also writes that the Ontario Time Act (1990, Chapter T.9) 1437# http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html 1438# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 1439# Officially Atikokan is therefore on CST/CDT, and most likely this report 1440# concerns a non-official time observed as a matter of local practice. 1441# 1442# From Paul Eggert (2000-10-02): 1443# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 1444# New Osnaburgh observe CST all year, that Big Trout Lake observes 1445# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 1446# violation of the official Ontario rules. 1447# 1448# From Paul Eggert (2006-07-09): 1449# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the 1450# 2005-07-21 Chronicle-Journal, which said: 1451# 1452# The clocks in Atikokan stay set on standard time year-round. 1453# This means they spend about half the time on central time and 1454# the other half on eastern time. 1455# 1456# For the most part, the system works, Mayor Dennis Brown said. 1457# 1458# "The majority of businesses in Atikokan deal more with Eastern 1459# Canada, but there are some that deal with Western Canada," he 1460# said. "I don't see any changes happening here." 1461# 1462# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang 1463# [New Osnaburgh] follow the same practice." 1464 1465# From Garry McKinnon (2006-07-14) via Chris Walton: 1466# I chatted with a member of my board who has an outstanding memory 1467# and a long history in Atikokan (and in the telecom industry) and he 1468# can say for certain that Atikokan has been practicing the current 1469# time keeping since 1952, at least. 1470 1471# From Paul Eggert (2006-07-17): 1472# Shanks & Pottenger say that Atikokan has agreed with Rainy River 1473# ever since standard time was introduced, but the information from 1474# McKinnon sounds more authoritative. For now, assume that Atikokan 1475# switched to EST immediately after WWII era daylight saving time 1476# ended. This matches the old (less-populous) America/Coral_Harbour 1477# entry since our cutoff date of 1970, so we can move 1478# America/Coral_Harbour to the 'backward' file. 1479 1480# From Mark Brader (2010-03-06): 1481# 1482# Currently the database has: 1483# 1484# # Ontario 1485# 1486# # From Paul Eggert (2006-07-09): 1487# # Shanks & Pottenger write that since 1970 most of Ontario has been like 1488# # Toronto. 1489# # Thunder Bay skipped DST in 1973. 1490# # Many smaller locales did not observe peacetime DST until 1974; 1491# # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1492# 1493# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom 1494# right corner of page 1, it says that Toronto will return to standard 1495# time at 2 am Sunday morning (which agrees with the database), and that: 1496# 1497# The one-hour setback will go into effect throughout most of Ontario, 1498# except in areas like Windsor which remains on standard time all year. 1499# 1500# Windsor is, of course, a lot larger than Nipigon. 1501# 1502# I only came across this incidentally. I don't know if Windsor began 1503# observing DST when Detroit did, or in 1974, or on some other date. 1504# 1505# By the way, the article continues by noting that: 1506# 1507# Some cities in the United States have pushed the deadline back 1508# three weeks and will change over from daylight saving in October. 1509 1510# From Arthur David Olson (2010-07-17): 1511# 1512# "Standard Time and Time Zones in Canada" appeared in 1513# The Journal of The Royal Astronomical Society of Canada, 1514# volume 26, number 2 (February 1932) and, as of 2010-07-17, 1515# was available at 1516# http://adsabs.harvard.edu/full/1932JRASC..26...49S 1517# 1518# It includes the text below (starting on page 57): 1519# 1520# A list of the places in Canada using daylight saving time would 1521# require yearly revision. From information kindly furnished by 1522# the provincial governments and by the postmasters in many cities 1523# and towns, it is found that the following places used daylight sav- 1524# ing in 1930. The information for the province of Quebec is definite, 1525# for the other provinces only approximate: 1526# 1527# Province Daylight saving time used 1528# Prince Edward Island Not used. 1529# Nova Scotia In Halifax only. 1530# New Brunswick In St. John only. 1531# Quebec In the following places: 1532# Montreal Lachine 1533# Quebec Mont-Royal 1534# L��vis Iberville 1535# St. Lambert Cap de la Madel��ine 1536# Verdun Loretteville 1537# Westmount Richmond 1538# Outremont St. J��r��me 1539# Longueuil Greenfield Park 1540# Arvida Waterloo 1541# Chambly-Canton Beaulieu 1542# Melbourne La Tuque 1543# St. Th��ophile Buckingham 1544# Ontario Used generally in the cities and towns along 1545# the southerly part of the province. Not 1546# used in the northwesterly part. 1547# Manitoba Not used. 1548# Saskatchewan In Regina only. 1549# Alberta Not used. 1550# British Columbia Not used. 1551# 1552# With some exceptions, the use of daylight saving may be said to be limited 1553# to those cities and towns lying between Quebec city and Windsor, Ont. 1554 1555# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1556Rule Toronto 1919 only - Mar 30 23:30 1:00 D 1557Rule Toronto 1919 only - Oct 26 0:00 0 S 1558Rule Toronto 1920 only - May 2 2:00 1:00 D 1559Rule Toronto 1920 only - Sep 26 0:00 0 S 1560Rule Toronto 1921 only - May 15 2:00 1:00 D 1561Rule Toronto 1921 only - Sep 15 2:00 0 S 1562Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1563# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1564# was meant. 1565Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1566Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1567# The 1927-to-1939 rules can be expressed more simply as 1568# Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1569# Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1570# Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1571# Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1572# The rules below avoid use of Sun>=25 1573# (which pre-2004 versions of zic cannot handle). 1574Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1575Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1576Rule Toronto 1932 only - May 1 2:00 1:00 D 1577Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1578Rule Toronto 1933 only - Oct 1 2:00 0 S 1579Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1580Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1581Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1582Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1583Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1584Rule Toronto 1949 only - Nov lastSun 0:00 0 S 1585Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1586Rule Toronto 1950 only - Nov lastSun 2:00 0 S 1587Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1588# Shanks & Pottenger say Toronto ended DST a week early in 1971, 1589# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 1590# is wrong, and that he had confirmed it by checking the 1971-10-30 1591# Toronto Star, which said that DST was ending 1971-10-31 as usual. 1592Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1593 1594# From Paul Eggert (2003-07-27): 1595# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1596# Port Arthur, Ontario, the principle of the Bill has been in 1597# operation for the past three years, and in the City of Moose Jaw, 1598# Saskatchewan, for one year." 1599 1600# From David Bryan via Tory Tronrud, Director/Curator, 1601# Thunder Bay Museum (2003-11-12): 1602# There is some suggestion, however, that, by-law or not, daylight 1603# savings time was being practiced in Fort William and Port Arthur 1604# before 1909.... [I]n 1910, the line between the Eastern and Central 1605# Time Zones was permanently moved about two hundred miles west to 1606# include the Thunder Bay area.... When Canada adopted daylight 1607# savings time in 1916, Fort William and Port Arthur, having done so 1608# already, did not change their clocks.... During the Second World 1609# War,... [t]he cities agreed to implement DST during the summer 1610# months for the remainder of the war years. 1611 1612# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1613Zone America/Toronto -5:17:32 - LMT 1895 1614 -5:00 Canada E%sT 1919 1615 -5:00 Toronto E%sT 1942 Feb 9 2:00s 1616 -5:00 Canada E%sT 1946 1617 -5:00 Toronto E%sT 1974 1618 -5:00 Canada E%sT 1619Zone America/Thunder_Bay -5:57:00 - LMT 1895 1620 -6:00 - CST 1910 1621 -5:00 - EST 1942 1622 -5:00 Canada E%sT 1970 1623 -5:00 Toronto E%sT 1973 1624 -5:00 - EST 1974 1625 -5:00 Canada E%sT 1626Zone America/Nipigon -5:53:04 - LMT 1895 1627 -5:00 Canada E%sT 1940 Sep 29 1628 -5:00 1:00 EDT 1942 Feb 9 2:00s 1629 -5:00 Canada E%sT 1630Zone America/Rainy_River -6:18:16 - LMT 1895 1631 -6:00 Canada C%sT 1940 Sep 29 1632 -6:00 1:00 CDT 1942 Feb 9 2:00s 1633 -6:00 Canada C%sT 1634Zone America/Atikokan -6:06:28 - LMT 1895 1635 -6:00 Canada C%sT 1940 Sep 29 1636 -6:00 1:00 CDT 1942 Feb 9 2:00s 1637 -6:00 Canada C%sT 1945 Sep 30 2:00 1638 -5:00 - EST 1639 1640 1641# Manitoba 1642 1643# From Rob Douglas (2006-04-06): 1644# the old Manitoba Time Act - as amended by Bill 2, assented to 1645# March 27, 1987 ... said ... 1646# "between two o'clock Central Standard Time in the morning of 1647# the first Sunday of April of each year and two o'clock Central 1648# Standard Time in the morning of the last Sunday of October next 1649# following, one hour in advance of Central Standard Time."... 1650# I believe that the English legislation [of the old time act] had 1651# been assented to (March 22, 1967).... 1652# Also, as far as I can tell, there was no order-in-council varying 1653# the time of Daylight Saving Time for 2005 and so the provisions of 1654# the 1987 version would apply - the changeover was at 2:00 Central 1655# Standard Time (i.e. not until 3:00 Central Daylight Time). 1656 1657# From Paul Eggert (2006-04-10): 1658# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1659# starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1660# it was also 02:00s in 1966. 1661 1662# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1663Rule Winn 1916 only - Apr 23 0:00 1:00 D 1664Rule Winn 1916 only - Sep 17 0:00 0 S 1665Rule Winn 1918 only - Apr 14 2:00 1:00 D 1666Rule Winn 1918 only - Oct 27 2:00 0 S 1667Rule Winn 1937 only - May 16 2:00 1:00 D 1668Rule Winn 1937 only - Sep 26 2:00 0 S 1669Rule Winn 1942 only - Feb 9 2:00 1:00 W # War 1670Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 1671Rule Winn 1945 only - Sep lastSun 2:00 0 S 1672Rule Winn 1946 only - May 12 2:00 1:00 D 1673Rule Winn 1946 only - Oct 13 2:00 0 S 1674Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 1675Rule Winn 1947 1949 - Sep lastSun 2:00 0 S 1676Rule Winn 1950 only - May 1 2:00 1:00 D 1677Rule Winn 1950 only - Sep 30 2:00 0 S 1678Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 1679Rule Winn 1951 1958 - Sep lastSun 2:00 0 S 1680Rule Winn 1959 only - Oct lastSun 2:00 0 S 1681Rule Winn 1960 only - Sep lastSun 2:00 0 S 1682Rule Winn 1963 only - Apr lastSun 2:00 1:00 D 1683Rule Winn 1963 only - Sep 22 2:00 0 S 1684Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1685Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1686Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 1687# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1688Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1689 -6:00 Winn C%sT 2006 1690 -6:00 Canada C%sT 1691 1692 1693# Saskatchewan 1694 1695# From Mark Brader (2003-07-26): 1696# The first actual adoption of DST in Canada was at the municipal 1697# level. As the [Toronto] Star put it (1912-06-07), "While people 1698# elsewhere have long been talking of legislation to save daylight, 1699# the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1700# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1701# presumably late evening, as below), and would run until "the end of 1702# the summer". The discrepancy between municipal time and railroad 1703# time was noted. 1704 1705# From Paul Eggert (2003-07-27): 1706# Willett (1914-03) notes that DST "has been in operation ... in the 1707# City of Moose Jaw, Saskatchewan, for one year." 1708 1709# From Paul Eggert (2006-03-22): 1710# Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 1711# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 1712# Other western towns (e.g. Lloydminster) are like Edmonton. 1713# Matthews and Vincent (1998) write that Denare Beach and Creighton 1714# are like Winnipeg, in violation of Saskatchewan law. 1715 1716# From W. Jones (1992-11-06): 1717# The. . .below is based on information I got from our law library, the 1718# provincial archives, and the provincial Community Services department. 1719# A precise history would require digging through newspaper archives, and 1720# since you didn't say what you wanted, I didn't bother. 1721# 1722# Saskatchewan is split by a time zone meridian (105W) and over the years 1723# the boundary became pretty ragged as communities near it reevaluated 1724# their affiliations in one direction or the other. In 1965 a provincial 1725# referendum favoured legislating common time practices. 1726# 1727# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 1728# Saskatchewan 1978) was proclaimed, and established that the eastern 1729# part of Saskatchewan would use CST year round, that districts in 1730# northwest Saskatchewan would by default follow CST but could opt to 1731# follow Mountain Time rules (thus 1 hour difference in the winter and 1732# zero in the summer), and that districts in southwest Saskatchewan would 1733# by default follow MT but could opt to follow CST. 1734# 1735# It took a few years for the dust to settle (I know one story of a town 1736# on one time zone having its school in another, such that a mom had to 1737# serve her family lunch in two shifts), but presently it seems that only 1738# a few towns on the border with Alberta (e.g. Lloydminster) follow MT 1739# rules any more; all other districts appear to have used CST year round 1740# since sometime in the 1960s. 1741 1742# From Chris Walton (2006-06-26): 1743# The Saskatchewan time act which was last updated in 1996 is about 30 pages 1744# long and rather painful to read. 1745# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 1746 1747# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1748Rule Regina 1918 only - Apr 14 2:00 1:00 D 1749Rule Regina 1918 only - Oct 27 2:00 0 S 1750Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 1751Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 1752Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 1753Rule Regina 1937 only - Oct Sun>=8 0:00 0 S 1754Rule Regina 1938 only - Oct Sun>=1 0:00 0 S 1755Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1756Rule Regina 1942 only - Feb 9 2:00 1:00 W # War 1757Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 1758Rule Regina 1945 only - Sep lastSun 2:00 0 S 1759Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 1760Rule Regina 1946 only - Oct Sun>=8 2:00 0 S 1761Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1762Rule Regina 1947 1957 - Sep lastSun 2:00 0 S 1763Rule Regina 1959 only - Apr lastSun 2:00 1:00 D 1764Rule Regina 1959 only - Oct lastSun 2:00 0 S 1765# 1766Rule Swift 1957 only - Apr lastSun 2:00 1:00 D 1767Rule Swift 1957 only - Oct lastSun 2:00 0 S 1768Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 1769Rule Swift 1959 only - Oct lastSun 2:00 0 S 1770Rule Swift 1960 1961 - Sep lastSun 2:00 0 S 1771# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1772Zone America/Regina -6:58:36 - LMT 1905 Sep 1773 -7:00 Regina M%sT 1960 Apr lastSun 2:00 1774 -6:00 - CST 1775Zone America/Swift_Current -7:11:20 - LMT 1905 Sep 1776 -7:00 Canada M%sT 1946 Apr lastSun 2:00 1777 -7:00 Regina M%sT 1950 1778 -7:00 Swift M%sT 1972 Apr lastSun 2:00 1779 -6:00 - CST 1780 1781 1782# Alberta 1783 1784# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1785Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 1786Rule Edm 1918 only - Oct 27 2:00 0 S 1787Rule Edm 1919 only - May 27 2:00 0 S 1788Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 1789Rule Edm 1920 only - Oct lastSun 2:00 0 S 1790Rule Edm 1921 1923 - Sep lastSun 2:00 0 S 1791Rule Edm 1942 only - Feb 9 2:00 1:00 W # War 1792Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 1793Rule Edm 1945 only - Sep lastSun 2:00 0 S 1794Rule Edm 1947 only - Apr lastSun 2:00 1:00 D 1795Rule Edm 1947 only - Sep lastSun 2:00 0 S 1796Rule Edm 1967 only - Apr lastSun 2:00 1:00 D 1797Rule Edm 1967 only - Oct lastSun 2:00 0 S 1798Rule Edm 1969 only - Apr lastSun 2:00 1:00 D 1799Rule Edm 1969 only - Oct lastSun 2:00 0 S 1800Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1801Rule Edm 1972 2006 - Oct lastSun 2:00 0 S 1802# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1803Zone America/Edmonton -7:33:52 - LMT 1906 Sep 1804 -7:00 Edm M%sT 1987 1805 -7:00 Canada M%sT 1806 1807 1808# British Columbia 1809 1810# From Paul Eggert (2006-03-22): 1811# Shanks & Pottenger write that since 1970 most of this region has 1812# been like Vancouver. 1813# Dawson Creek uses MST. Much of east BC is like Edmonton. 1814# Matthews and Vincent (1998) write that Creston is like Dawson Creek. 1815 1816# It seems though that (re: Creston) is not entirely correct: 1817 1818# From Chris Walton (2011-12-01): 1819# There are two areas within the Canadian province of British Columbia 1820# that do not currently observe daylight saving: 1821# a) The Creston Valley (includes the town of Creston and surrounding area) 1822# b) The eastern half of the Peace River Regional District 1823# (includes the cities of Dawson Creek and Fort St. John) 1824 1825# Earlier this year I stumbled across a detailed article about the time 1826# keeping history of Creston; it was written by Tammy Hardwick who is the 1827# manager of the Creston & District Museum. The article was written in May 2009. 1828# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1829# According to the article, Creston has not changed its clocks since June 1918. 1830# i.e. Creston has been stuck on UTC-7 for 93 years. 1831# Dawson Creek, on the other hand, changed its clocks as recently as April 1972. 1832 1833# Unfortunately the exact date for the time change in June 1918 remains 1834# unknown and will be difficult to ascertain. I e-mailed Tammy a few months 1835# ago to ask if Sunday June 2 was a reasonable guess. She said it was just 1836# as plausible as any other date (in June). She also said that after writing 1837# the article she had discovered another time change in 1916; this is the 1838# subject of another article which she wrote in October 2010. 1839# http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56 1840 1841# Here is a summary of the three clock change events in Creston's history: 1842# 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7) 1843# Exact date unknown 1844# 2. Oct 1916: switch to Pacific Standard Time (GMT-8) 1845# Exact date in October unknown; Sunday October 1 is a reasonable guess. 1846# 3. June 1918: switch to Pacific Daylight Time (GMT-7) 1847# Exact date in June unknown; Sunday June 2 is a reasonable guess. 1848# note 1: 1849# On Oct 27/1918 when daylight saving ended in the rest of Canada, 1850# Creston did not change its clocks. 1851# note 2: 1852# During WWII when the Federal Government legislated a mandatory clock change, 1853# Creston did not oblige. 1854# note 3: 1855# There is no guarantee that Creston will remain on Mountain Standard Time 1856# (UTC-7) forever. 1857# The subject was debated at least once this year by the town Council. 1858# http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html 1859 1860# During a period WWII, summer time (Daylight saying) was mandatory in Canada. 1861# In Creston, that was handled by shifting the area to PST (-8:00) then applying 1862# summer time to cause the offset to be -7:00, the same as it had been before 1863# the change. It can be argued that the timezone abbreviation during this 1864# period should be PDT rather than MST, but that doesn't seem important enough 1865# (to anyone) to further complicate the rules. 1866 1867# The transition dates (and times) are guesses. 1868 1869# From Matt Johnson (2015-09-21): 1870# Fort Nelson, BC, Canada will cancel DST this year. So while previously they 1871# were aligned with America/Vancouver, they're now aligned with 1872# America/Dawson_Creek. 1873# http://www.northernrockies.ca/EN/meta/news/archives/2015/northern-rockies-time-change.html 1874# 1875# From Tim Parenti (2015-09-23): 1876# This requires a new zone for the Northern Rockies Regional Municipality, 1877# America/Fort_Nelson. The resolution of 2014-12-08 was reached following a 1878# 2014-11-15 poll with nearly 75% support. Effectively, the municipality has 1879# been on MST (-0700) like Dawson Creek since it advanced its clocks on 1880# 2015-03-08. 1881# 1882# From Paul Eggert (2015-09-23): 1883# Shanks says Fort Nelson did not observe DST in 1946, unlike Vancouver. 1884 1885# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1886Rule Vanc 1918 only - Apr 14 2:00 1:00 D 1887Rule Vanc 1918 only - Oct 27 2:00 0 S 1888Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1889Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 1890Rule Vanc 1945 only - Sep 30 2:00 0 S 1891Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 1892Rule Vanc 1946 only - Oct 13 2:00 0 S 1893Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S 1894Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S 1895# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1896Zone America/Vancouver -8:12:28 - LMT 1884 1897 -8:00 Vanc P%sT 1987 1898 -8:00 Canada P%sT 1899Zone America/Dawson_Creek -8:00:56 - LMT 1884 1900 -8:00 Canada P%sT 1947 1901 -8:00 Vanc P%sT 1972 Aug 30 2:00 1902 -7:00 - MST 1903Zone America/Fort_Nelson -8:10:47 - LMT 1884 1904 -8:00 Vanc P%sT 1946 1905 -8:00 - PST 1947 1906 -8:00 Vanc P%sT 1987 1907 -8:00 Canada P%sT 2015 Mar 8 2:00 1908 -7:00 - MST 1909Zone America/Creston -7:46:04 - LMT 1884 1910 -7:00 - MST 1916 Oct 1 1911 -8:00 - PST 1918 Jun 2 1912 -7:00 - MST 1913 1914# Northwest Territories, Nunavut, Yukon 1915 1916# From Paul Eggert (2006-03-22): 1917# Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 1918# Mathew Englander (1996-10-07) gives the following refs: 1919# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 1920# c. 7 defines Yukon standard time as UTC-9.... 1921# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 1922# [http://canlii.ca/t/7vhg] 1923# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 1924# * O.I.C. 1980/02 established DST. 1925# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 1926 1927# From Brian Inglis (2015-04-14): 1928# 1929# I tried to trace the history of Yukon time and found the following 1930# regulations, giving the reference title and URL if found, regulation name, 1931# and relevant quote if available. Each regulation specifically revokes its 1932# predecessor. The final reference is to the current Interpretation Act 1933# authorizing and resulting from these regulatory changes. 1934# 1935# Only recent regulations were retrievable via Yukon government site search or 1936# index, and only some via Canadian legal sources. Other sources used include 1937# articles titled "Standard Time and Time Zones in Canada" from JRASC via ADS 1938# Abstracts, cited by ADO for 1932 ..., and updated versions from 1958 and 1939# 1970 quoted below; each article includes current extracts from provincial 1940# and territorial ST and DST regulations at the end, summaries and details of 1941# standard times and daylight saving time at many locations across Canada, 1942# with time zone maps, tables and calculations for Canadian Sunrise, Sunset, 1943# and LMST; they also cover many countries and global locations, with a chart 1944# and table showing current Universal Time offsets, and may be useful as 1945# another source of information for 1970 and earlier. 1946# 1947# * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26, 1948# pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS) 1949# http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75: 1950# Yukon Interpretation Ordinance 1951# Yukon standard time is the local mean time at the one hundred and 1952# thirty-fifth meridian. 1953# 1954# * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.; 1955# JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System 1956# (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1: 1957# Yukon Interpretation Ordinance, 1955, Chap. 16. 1958# 1959# (1) Subject to this section, standard time shall be reckoned as nine 1960# hours behind Greenwich Time and called Yukon Standard Time. 1961# 1962# (2) Notwithstanding subsection (1), the Commissioner may make regulations 1963# varying the manner of reckoning standard time. 1964# 1965# * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance 1966# http://? - no online source found 1967# 1968# * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC, 1969# Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS) 1970# http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon 1971# Territory Commissioner's Order 1967-59 Interpretation Ordinance ... 1972# 1973# 1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon 1974# Territory on 27th January, 1966, is hereby revoked. 1975# 1976# 2. Yukon (East) Standard Time as defined by section 36 of the 1977# Interpretation Ordinance from and after mid-night on the 28th day of May, 1978# 1967 shall be reckoned in the same manner as Pacific Standard Time, that 1979# is to say, eight hours behind Greenwich Time in the area of the Yukon 1980# Territory lying east of the 138th degree longitude west. 1981# 1982# 3. In the remainder of the Territory, lying west of the 138th degree 1983# longitude west, Yukon (West) Standard Time shall be reckoned as nine 1984# hours behind Greenwich Time. 1985# 1986# * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214 1987# http://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html 1988# C.O. 1973/214 INTERPRETATION ACT ... 1989# 1990# 1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby 1991# revoked. 1992# 1993# 2. Yukon Standard Time as defined by section 36 of the Interpretation 1994# Act from and after midnight on the twenty-eighth day of October, 1973 1995# shall be reckoned in the same manner as Pacific Standard Time, that is 1996# to say eight hours behind Greenwich Time. 1997# 1998# * O.I.C. 1980/02 INTERPRETATION ACT 1999# http://? - no online source found 2000# 2001# * Yukon Daylight Saving Time, YOIC 1987/56 2002# http://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html 2003# O.I.C. 1987/056 INTERPRETATION ACT ... 2004# 2005# In every year between 2006# (a) two o'clock in the morning in the first Sunday in April, and 2007# (b) two o'clock in the morning in the last Sunday in October, 2008# Standard Time shall be reckoned as seven hours behind Greenwich Time and 2009# called Yukon Daylight Saving Time. 2010# ... 2011# Dated ... 9th day of March, A.D., 1987. 2012# 2013# * Yukon Daylight Saving Time 2006, YOIC 2006/127 2014# http://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html 2015# O.I.C. 2006/127 INTERPRETATION ACT ... 2016# 2017# 1. In Yukon each year the time for general purposes shall be 7 hours 2018# behind Greenwich mean time during the period commencing at two o'clock 2019# in the forenoon on the second Sunday of March and ending at two o'clock 2020# in the forenoon on the first Sunday of November and shall be called 2021# Yukon Daylight Saving Time. 2022# 2023# 2. Order-in-Council 1987/56 is revoked. 2024# 2025# 3. This order comes into force January 1, 2007. 2026# 2027# * Interpretation Act, RSY 2002, c 125 2028# http://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html 2029 2030# From Rives McDow (1999-09-04): 2031# Nunavut ... moved ... to incorporate the whole territory into one time zone. 2032# Nunavut moves to single time zone Oct. 31 2033# http://www.nunatsiaq.com/nunavut/nvt90903_13.html 2034# 2035# From Antoine Leca (1999-09-06): 2036# We then need to create a new timezone for the Kitikmeot region of Nunavut 2037# to differentiate it from the Yellowknife region. 2038 2039# From Paul Eggert (1999-09-20): 2040# Basic Facts: The New Territory 2041# http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html 2042# (1999) reports that Pangnirtung operates on eastern time, 2043# and that Coral Harbour does not observe DST. We don't know when 2044# Pangnirtung switched to eastern time; we'll guess 1995. 2045 2046# From Rives McDow (1999-11-08): 2047# On October 31, when the rest of Nunavut went to Central time, 2048# Pangnirtung wobbled. Here is the result of their wobble: 2049# 2050# The following businesses and organizations in Pangnirtung use Central Time: 2051# 2052# First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 2053# Eastern Arctic National Parks, A & D Specialist 2054# 2055# The following businesses and organizations in Pangnirtung use Eastern Time: 2056# 2057# Hamlet office, All other businesses, Both schools, Airport operator 2058# 2059# This has made for an interesting situation there, which warranted the news. 2060# No one there that I spoke with seems concerned, or has plans to 2061# change the local methods of keeping time, as it evidently does not 2062# really interfere with any activities or make things difficult locally. 2063# They plan to celebrate New Year's turn-over twice, one hour apart, 2064# so it appears that the situation will last at least that long. 2065# The Nunavut Intergovernmental Affairs hopes that they will "come to 2066# their senses", but the locals evidently don't see any problem with 2067# the current state of affairs. 2068 2069# From Michaela Rodrigue, writing in the 2070# Nunatsiaq News (1999-11-19): 2071# http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html 2072# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 2073# central - or Nunavut time - for government offices, and eastern time 2074# for municipal offices and schools.... Igloolik [was similar but then] 2075# made the switch to central time on Saturday, Nov. 6. 2076 2077# From Paul Eggert (2000-10-02): 2078# Matthews and Vincent (1998) say the following, but we lack histories 2079# for these potential new Zones. 2080# 2081# The Canadian Forces station at Alert uses Eastern Time while the 2082# handful of residents at the Eureka weather station [in the Central 2083# zone] skip daylight savings. Baffin Island, which is crossed by the 2084# Central, Eastern and Atlantic Time zones only uses Eastern Time. 2085# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 2086# Central Time and Southampton Island [in the Central zone] is not 2087# required to use daylight savings. 2088 2089# From <http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html> 2090# Nunavut now has two time zones (2000-11-10): 2091# The Nunavut government would allow its employees in Kugluktuk and 2092# Cambridge Bay to operate on central time year-round, putting them 2093# one hour behind the rest of Nunavut for six months during the winter. 2094# At the end of October the two communities had rebelled against 2095# Nunavut's unified time zone, refusing to shift to eastern time with 2096# the rest of the territory for the winter. Cambridge Bay remained on 2097# central time, while Kugluktuk, even farther west, reverted to 2098# mountain time, which they had used before the advent of Nunavut's 2099# unified time zone in 1999. 2100# 2101# From Rives McDow (2001-01-20), quoting the Nunavut government: 2102# The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 2103 2104# From Paul Eggert (2000-12-04): 2105# Let's just keep track of the official times for now. 2106 2107# From Rives McDow (2001-03-07): 2108# The premier of Nunavut has issued a ministerial statement advising 2109# that effective 2001-04-01, the territory of Nunavut will revert 2110# back to three time zones (mountain, central, and eastern). Of the 2111# cities in Nunavut, Coral Harbor is the only one that I know of that 2112# has said it will not observe dst, staying on EST year round. I'm 2113# checking for more info, and will get back to you if I come up with 2114# more. 2115# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 2116 2117# From Gwillim Law (2005-05-21): 2118# According to ... 2119# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 2120# (from a 1998 Canadian Geographic article), the de facto and de jure time 2121# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 2122# round. Using Google, it's easy to find other websites that confirm this. 2123# I wasn't able to find how far back this time regimen goes, but since it 2124# predates the creation of Nunavut, it probably goes back many years.... 2125# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 2126# 2127# From Paul Eggert (2014-10-17): 2128# For lack of better information, assume that Southampton Island observed 2129# daylight saving only during wartime. Gwillim Law's email also 2130# mentioned maps now maintained by National Research Council Canada; 2131# see above for an up-to-date link. 2132 2133# From Chris Walton (2007-03-01): 2134# ... the community of Resolute (located on Cornwallis Island in 2135# Nunavut) moved from Central Time to Eastern Time last November. 2136# Basically the community did not change its clocks at the end of 2137# daylight saving.... 2138# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 2139 2140# From Chris Walton (2011-03-21): 2141# Back in 2007 I initiated the creation of a new "zone file" for Resolute 2142# Bay. Resolute Bay is a small community located about 900km north of 2143# the Arctic Circle. The zone file was required because Resolute Bay had 2144# decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007. 2145# 2146# According to new information which I received last week, Resolute Bay 2147# went back to using UTC-6 in the winter of 2007-2008... 2148# 2149# On March 11/2007 most of Canada went onto daylight saving. On March 2150# 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I 2151# talked to somebody that was both knowledgeable and helpful. I was able 2152# to confirm that Resolute Bay was still operating on UTC-5. It was 2153# explained to me that Resolute Bay had been on the Eastern Time zone 2154# (EST) in the winter, and was now back on the Central Time zone (CDT). 2155# i.e. the time zone had changed twice in the last year but the clocks 2156# had not moved. The residents had to know which time zone they were in 2157# so they could follow the correct TV schedule... 2158# 2159# On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I 2160# phoned the Resolute Bay hamlet office...[D]ue to the challenging nature 2161# of the phone call, I decided to seek out an alternate source of 2162# information. I found an e-mail address for somebody by the name of 2163# Stephanie Adams whose job was listed as "Inns North Support Officer for 2164# Arctic Co-operatives." I was under the impression that Stephanie lived 2165# and worked in Resolute Bay... 2166# 2167# On March 14/2011 I phoned the hamlet office again. I was told that 2168# Resolute Bay had been using Central Standard Time over the winter of 2169# 2010-2011 and that the clocks had therefore been moved one hour ahead 2170# on March 13/2011. The person I talked to was aware that Resolute Bay 2171# had previously experimented with Eastern Standard Time but he could not 2172# tell me when the practice had stopped. 2173# 2174# On March 17/2011 I searched the Web to find an e-mail address of 2175# somebody that might be able to tell me exactly when Resolute Bay went 2176# off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz 2177# used to be the mayor of Resolute Bay and he apparently owns half the 2178# businesses including "South Camp Inn." This website has some info on 2179# Aziz: 2180# http://www.uphere.ca/node/493 2181# 2182# I sent Aziz an e-mail asking when Resolute Bay had stopped using 2183# Eastern Standard Time. 2184# 2185# Aziz responded quickly with this: "hi, The time was not changed for the 2186# 1 year only, the following year, the community went back to the old way 2187# of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in 2188# the winter Zulu plus 6 hrs" 2189# 2190# This of course conflicted with everything I had ascertained in November 2008. 2191# 2192# I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz 2193# responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You 2194# may want to check with the weather office in Resolute Bay or do a 2195# search on the weather through Env. Canada. web site" 2196# 2197# If I had realized the Stephanie did not live in Resolute Bay I would 2198# never have contacted her. I now believe that all the information I 2199# obtained in November 2008 should be ignored... 2200# I apologize for reporting incorrect information in 2008. 2201 2202# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2203Rule NT_YK 1918 only - Apr 14 2:00 1:00 D 2204Rule NT_YK 1918 only - Oct 27 2:00 0 S 2205Rule NT_YK 1919 only - May 25 2:00 1:00 D 2206Rule NT_YK 1919 only - Nov 1 0:00 0 S 2207Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 2208Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 2209Rule NT_YK 1945 only - Sep 30 2:00 0 S 2210Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 2211Rule NT_YK 1965 only - Oct lastSun 2:00 0 S 2212Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 2213Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 2214Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 2215# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2216# aka Panniqtuuq 2217Zone America/Pangnirtung 0 - zzz 1921 # trading post est. 2218 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 2219 -5:00 Canada E%sT 1999 Oct 31 2:00 2220 -6:00 Canada C%sT 2000 Oct 29 2:00 2221 -5:00 Canada E%sT 2222# formerly Frobisher Bay 2223Zone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est. 2224 -5:00 NT_YK E%sT 1999 Oct 31 2:00 2225 -6:00 Canada C%sT 2000 Oct 29 2:00 2226 -5:00 Canada E%sT 2227# aka Qausuittuq 2228Zone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded 2229 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2230 -5:00 - EST 2001 Apr 1 3:00 2231 -6:00 Canada C%sT 2006 Oct 29 2:00 2232 -5:00 - EST 2007 Mar 11 3:00 2233 -6:00 Canada C%sT 2234# aka Kangiqiniq 2235Zone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded 2236 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2237 -5:00 - EST 2001 Apr 1 3:00 2238 -6:00 Canada C%sT 2239# aka Iqaluktuuttiaq 2240Zone America/Cambridge_Bay 0 - zzz 1920 # trading post est.? 2241 -7:00 NT_YK M%sT 1999 Oct 31 2:00 2242 -6:00 Canada C%sT 2000 Oct 29 2:00 2243 -5:00 - EST 2000 Nov 5 0:00 2244 -6:00 - CST 2001 Apr 1 3:00 2245 -7:00 Canada M%sT 2246Zone America/Yellowknife 0 - zzz 1935 # Yellowknife founded? 2247 -7:00 NT_YK M%sT 1980 2248 -7:00 Canada M%sT 2249Zone America/Inuvik 0 - zzz 1953 # Inuvik founded 2250 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 2251 -7:00 NT_YK M%sT 1980 2252 -7:00 Canada M%sT 2253Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 2254 -9:00 NT_YK Y%sT 1967 May 28 0:00 2255 -8:00 NT_YK P%sT 1980 2256 -8:00 Canada P%sT 2257Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 2258 -9:00 NT_YK Y%sT 1973 Oct 28 0:00 2259 -8:00 NT_YK P%sT 1980 2260 -8:00 Canada P%sT 2261 2262 2263############################################################################### 2264 2265# Mexico 2266 2267# From Paul Eggert (2014-12-07): 2268# The Investigation and Analysis Service of the 2269# Mexican Library of Congress (MLoC) has published a 2270# history of Mexican local time (in Spanish) 2271# http://www.diputados.gob.mx/bibliot/publica/inveyana/polisoc/horver/index.htm 2272# 2273# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 2274# (In all cases we go with the MLoC.) 2275# S&P report that Baja was at -8:00 in 1922/1923. 2276# S&P say the 1930 transition in Baja was 1930-11-16. 2277# S&P report no DST during summer 1931. 2278# S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 2279 2280# From Gwillim Law (2001-02-20): 2281# There are some other discrepancies between the Decrees page and the 2282# tz database. I think they can best be explained by supposing that 2283# the researchers who prepared the Decrees page failed to find some of 2284# the relevant documents. 2285 2286# From Alan Perry (1996-02-15): 2287# A guy from our Mexico subsidiary finally found the Presidential Decree 2288# outlining the timezone changes in Mexico. 2289# 2290# ------------- Begin Forwarded Message ------------- 2291# 2292# I finally got my hands on the Official Presidential Decree that sets up the 2293# rules for the DST changes. The rules are: 2294# 2295# 1. The country is divided in 3 timezones: 2296# - Baja California Norte (the Mexico/BajaNorte TZ) 2297# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 2298# - The rest of the country (the Mexico/General TZ) 2299# 2300# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 2301# at 2:00 AM, the times in each zone are as follows: 2302# BajaNorte: GMT+7 2303# BajaSur: GMT+6 2304# General: GMT+5 2305# 2306# 3. The rest of the year, the times are as follows: 2307# BajaNorte: GMT+8 2308# BajaSur: GMT+7 2309# General: GMT+6 2310# 2311# The Decree was published in Mexico's Official Newspaper on January 4th. 2312# 2313# -------------- End Forwarded Message -------------- 2314# From Paul Eggert (1996-06-12): 2315# For an English translation of the decree, see 2316# "Diario Oficial: Time Zone Changeover" (1996-01-04). 2317# http://mexico-travel.com/extra/timezone_eng.html 2318 2319# From Rives McDow (1998-10-08): 2320# The State of Quintana Roo has reverted back to central STD and DST times 2321# (i.e. UTC -0600 and -0500 as of 1998-08-02). 2322 2323# From Rives McDow (2000-01-10): 2324# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 2325# zone 5 hours from the International Date Line, and will not observe daylight 2326# savings time so as to stay on the same time zone as the southern part of 2327# Arizona year round. 2328 2329# From Jesper N��rgaard, translating 2330# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 2331# In Oaxaca, the 55.000 teachers from the Section 22 of the National 2332# Syndicate of Education Workers, refuse to apply daylight saving each 2333# year, so that the more than 10,000 schools work at normal hour the 2334# whole year. 2335 2336# From Gwillim Law (2001-01-19): 2337# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 2338# (translated):... 2339# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 2340# that Summer Time will be reduced from seven to five months, starting 2341# this year.... 2342# http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001 2343# [translated], says "summer time will ... take effect on the first Sunday 2344# in May, and end on the last Sunday of September. 2345 2346# From Arthur David Olson (2001-01-25): 2347# The 2001-01-24 traditional Washington Post contained the page one 2348# story "Timely Issue Divides Mexicans."... 2349# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 2350# ... Mexico City Mayor L��pez Obrador "...is threatening to keep 2351# Mexico City and its 20 million residents on a different time than 2352# the rest of the country..." In particular, L��pez Obrador would abolish 2353# observation of Daylight Saving Time. 2354 2355# Official statute published by the Energy Department 2356# http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre 2357# (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 2358# and Sonora with no DST. This was reported by Jesper N��rgaard (2001-02-03). 2359 2360# From Paul Eggert (2001-03-03): 2361# 2362# http://www.latimes.com/news/nation/20010303/t000018766.html 2363# James F. Smith writes in today's LA Times 2364# * Sonora will continue to observe standard time. 2365# * Last week Mexico City's mayor Andr��s Manuel L��pez Obrador decreed that 2366# the Federal District will not adopt DST. 2367# * 4 of 16 district leaders announced they'll ignore the decree. 2368# * The decree does not affect federal-controlled facilities including 2369# the airport, banks, hospitals, and schools. 2370# 2371# For now we'll assume that the Federal District will bow to federal rules. 2372 2373# From Jesper N��rgaard (2001-04-01): 2374# I found some references to the Mexican application of daylight 2375# saving, which modifies what I had already sent you, stating earlier 2376# that a number of northern Mexican states would go on daylight 2377# saving. The modification reverts this to only cover Baja California 2378# (Norte), while all other states (except Sonora, who has no daylight 2379# saving all year) will follow the original decree of president 2380# Vicente Fox, starting daylight saving May 6, 2001 and ending 2381# September 30, 2001. 2382# References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp> 2383# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 2384 2385# From Reuters (2001-09-04): 2386# Mexico's Supreme Court on Tuesday declared that daylight savings was 2387# unconstitutional in Mexico City, creating the possibility the 2388# capital will be in a different time zone from the rest of the nation 2389# next year.... The Supreme Court's ruling takes effect at 2:00 2390# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 2391# standard time. "This is so residents of the Federal District are not 2392# subject to unexpected time changes," a statement from the court said. 2393 2394# From Jesper N��rgaard Welen (2002-03-12): 2395# ... consulting my local grocery store(!) and my coworkers, they all insisted 2396# that a new decision had been made to reinstate US style DST in Mexico.... 2397# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 2398# confirms this. Sonora as usual is the only state where DST is not applied. 2399 2400# From Steffen Thorsen (2009-12-28): 2401# 2402# Steffen Thorsen wrote: 2403# > Mexico's House of Representatives has approved a proposal for northern 2404# > Mexico's border cities to share the same daylight saving schedule as 2405# > the United States. 2406# Now this has passed both the Congress and the Senate, so starting from 2407# 2010, some border regions will be the same: 2408# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ 2409# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 2410# (Spanish) 2411# 2412# Could not find the new law text, but the proposed law text changes are here: 2413# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf 2414# (Gaceta Parlamentaria) 2415# 2416# There is also a list of the votes here: 2417# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html 2418# 2419# Our page: 2420# http://www.timeanddate.com/news/time/north-mexico-dst-change.html 2421 2422# From Arthur David Olson (2010-01-20): 2423# The page 2424# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2425# includes this text: 2426# En los municipios fronterizos de Tijuana y Mexicali en Baja California; 2427# Ju��rez y Ojinaga en Chihuahua; Acu��a y Piedras Negras en Coahuila; 2428# An��huac en Nuevo Le��n; y Nuevo Laredo, Reynosa y Matamoros en 2429# Tamaulipas, la aplicaci��n de este horario estacional surtir�� efecto 2430# desde las dos horas del segundo domingo de marzo y concluir�� a las dos 2431# horas del primer domingo de noviembre. 2432# En los municipios fronterizos que se encuentren ubicados en la franja 2433# fronteriza norte en el territorio comprendido entre la l��nea 2434# internacional y la l��nea paralela ubicada a una distancia de veinte 2435# kil��metros, as�� como la Ciudad de Ensenada, Baja California, hacia el 2436# interior del pa��s, la aplicaci��n de este horario estacional surtir�� 2437# efecto desde las dos horas del segundo domingo de marzo y concluir�� a 2438# las dos horas del primer domingo de noviembre. 2439 2440# From Steffen Thorsen (2014-12-08), translated by Gwillim Law: 2441# The Mexican state of Quintana Roo will likely change to EST in 2015. 2442# 2443# http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo 2444# "With this change, the time conflict that has existed between the municipios 2445# of Quintana Roo and the municipio of Felipe Carrillo Puerto may come to an 2446# end. The latter declared itself in rebellion 15 years ago when a time change 2447# was initiated in Mexico, and since then it has refused to change its time 2448# zone along with the rest of the country." 2449# 2450# From Steffen Thorsen (2015-01-14), translated by Gwillim Law: 2451# http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html 2452# "...the new time zone will come into effect at two o'clock on the first Sunday 2453# of February, when we will have to advance the clock one hour from its current 2454# time..." 2455# Also, the new zone will not use DST. 2456# 2457# From Carlos Ra��l Perasso (2015-02-02): 2458# The decree that modifies the Mexican Hour System Law has finally 2459# been published at the Diario Oficial de la Federaci��n 2460# http://www.dof.gob.mx/nota_detalle.php?codigo=5380123&fecha=31/01/2015 2461# It establishes 5 zones for Mexico: 2462# 1- Zona Centro (Central Zone): Corresponds to longitude 90 W, 2463# includes most of Mexico, excluding what's mentioned below. 2464# 2- Zona Pac��fico (Pacific Zone): Longitude 105 W, includes the 2465# states of Baja California Sur; Chihuahua; Nayarit (excluding Bah��a 2466# de Banderas which lies in Central Zone); Sinaloa and Sonora. 2467# 3- Zona Noroeste (Northwest Zone): Longitude 120 W, includes the 2468# state of Baja California. 2469# 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state 2470# of Quintana Roo. 2471# 5- The islands, reefs and keys shall take their timezone from the 2472# longitude they are located at. 2473 2474# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2475Rule Mexico 1939 only - Feb 5 0:00 1:00 D 2476Rule Mexico 1939 only - Jun 25 0:00 0 S 2477Rule Mexico 1940 only - Dec 9 0:00 1:00 D 2478Rule Mexico 1941 only - Apr 1 0:00 0 S 2479Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War 2480Rule Mexico 1944 only - May 1 0:00 0 S 2481Rule Mexico 1950 only - Feb 12 0:00 1:00 D 2482Rule Mexico 1950 only - Jul 30 0:00 0 S 2483Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 2484Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S 2485Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D 2486Rule Mexico 2001 only - Sep lastSun 2:00 0 S 2487Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 2488Rule Mexico 2002 max - Oct lastSun 2:00 0 S 2489# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2490# Quintana Roo; represented by Canc��n 2491Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 2492 -6:00 - CST 1981 Dec 23 2493 -5:00 Mexico E%sT 1998 Aug 2 2:00 2494 -6:00 Mexico C%sT 2015 Feb 1 2:00 2495 -5:00 - EST 2496# Campeche, Yucat��n; represented by M��rida 2497Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 2498 -6:00 - CST 1981 Dec 23 2499 -5:00 - EST 1982 Dec 2 2500 -6:00 Mexico C%sT 2501# Coahuila, Durango, Nuevo Le��n, Tamaulipas (near US border) 2502Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 2503 -6:00 - CST 1988 2504 -6:00 US C%sT 1989 2505 -6:00 Mexico C%sT 2010 2506 -6:00 US C%sT 2507# Coahuila, Durango, Nuevo Le��n, Tamaulipas (away from US border) 2508Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 2509 -6:00 - CST 1988 2510 -6:00 US C%sT 1989 2511 -6:00 Mexico C%sT 2512# Central Mexico 2513Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 2514 -7:00 - MST 1927 Jun 10 23:00 2515 -6:00 - CST 1930 Nov 15 2516 -7:00 - MST 1931 May 1 23:00 2517 -6:00 - CST 1931 Oct 2518 -7:00 - MST 1932 Apr 1 2519 -6:00 Mexico C%sT 2001 Sep 30 2:00 2520 -6:00 - CST 2002 Feb 20 2521 -6:00 Mexico C%sT 2522# Chihuahua (near US border) 2523Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 2524 -7:00 - MST 1927 Jun 10 23:00 2525 -6:00 - CST 1930 Nov 15 2526 -7:00 - MST 1931 May 1 23:00 2527 -6:00 - CST 1931 Oct 2528 -7:00 - MST 1932 Apr 1 2529 -6:00 - CST 1996 2530 -6:00 Mexico C%sT 1998 2531 -6:00 - CST 1998 Apr Sun>=1 3:00 2532 -7:00 Mexico M%sT 2010 2533 -7:00 US M%sT 2534# Chihuahua (away from US border) 2535Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 2536 -7:00 - MST 1927 Jun 10 23:00 2537 -6:00 - CST 1930 Nov 15 2538 -7:00 - MST 1931 May 1 23:00 2539 -6:00 - CST 1931 Oct 2540 -7:00 - MST 1932 Apr 1 2541 -6:00 - CST 1996 2542 -6:00 Mexico C%sT 1998 2543 -6:00 - CST 1998 Apr Sun>=1 3:00 2544 -7:00 Mexico M%sT 2545# Sonora 2546Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 2547 -7:00 - MST 1927 Jun 10 23:00 2548 -6:00 - CST 1930 Nov 15 2549 -7:00 - MST 1931 May 1 23:00 2550 -6:00 - CST 1931 Oct 2551 -7:00 - MST 1932 Apr 1 2552 -6:00 - CST 1942 Apr 24 2553 -7:00 - MST 1949 Jan 14 2554 -8:00 - PST 1970 2555 -7:00 Mexico M%sT 1999 2556 -7:00 - MST 2557 2558# From Alexander Krivenyshev (2010-04-21): 2559# According to news, Bah��a de Banderas (Mexican state of Nayarit) 2560# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to 2561# share the same time zone as nearby city Puerto Vallarta, Jalisco). 2562# 2563# (Spanish) 2564# Bah��a de Banderas homologa su horario al del centro del 2565# pa��s, a partir de este domingo 2566# http://www.nayarit.gob.mx/notes.asp?id=20748 2567# 2568# Bah��a de Banderas homologa su horario con el del Centro del 2569# Pa��s 2570# 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 2571# 2572# (English) 2573# Puerto Vallarta and Bah��a de Banderas: One Time Zone 2574# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml 2575# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html 2576# 2577# "Mexico's Senate approved the amendments to the Mexican Schedule System that 2578# will allow Bah��a de Banderas and Puerto Vallarta to share the same time 2579# zone ..." 2580# Baja California Sur, Nayarit, Sinaloa 2581 2582# From Arthur David Olson (2010-05-01): 2583# Use "Bahia_Banderas" to keep the name to fourteen characters. 2584 2585# Mazatl��n 2586Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 2587 -7:00 - MST 1927 Jun 10 23:00 2588 -6:00 - CST 1930 Nov 15 2589 -7:00 - MST 1931 May 1 23:00 2590 -6:00 - CST 1931 Oct 2591 -7:00 - MST 1932 Apr 1 2592 -6:00 - CST 1942 Apr 24 2593 -7:00 - MST 1949 Jan 14 2594 -8:00 - PST 1970 2595 -7:00 Mexico M%sT 2596 2597# Bah��a de Banderas 2598Zone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 2599 -7:00 - MST 1927 Jun 10 23:00 2600 -6:00 - CST 1930 Nov 15 2601 -7:00 - MST 1931 May 1 23:00 2602 -6:00 - CST 1931 Oct 2603 -7:00 - MST 1932 Apr 1 2604 -6:00 - CST 1942 Apr 24 2605 -7:00 - MST 1949 Jan 14 2606 -8:00 - PST 1970 2607 -7:00 Mexico M%sT 2010 Apr 4 2:00 2608 -6:00 Mexico C%sT 2609 2610# Baja California (near US border) 2611Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 2612 -7:00 - MST 1924 2613 -8:00 - PST 1927 Jun 10 23:00 2614 -7:00 - MST 1930 Nov 15 2615 -8:00 - PST 1931 Apr 1 2616 -8:00 1:00 PDT 1931 Sep 30 2617 -8:00 - PST 1942 Apr 24 2618 -8:00 1:00 PWT 1945 Aug 14 23:00u 2619 -8:00 1:00 PPT 1945 Nov 12 # Peace 2620 -8:00 - PST 1948 Apr 5 2621 -8:00 1:00 PDT 1949 Jan 14 2622 -8:00 - PST 1954 2623 -8:00 CA P%sT 1961 2624 -8:00 - PST 1976 2625 -8:00 US P%sT 1996 2626 -8:00 Mexico P%sT 2001 2627 -8:00 US P%sT 2002 Feb 20 2628 -8:00 Mexico P%sT 2010 2629 -8:00 US P%sT 2630# From Paul Eggert (2006-03-22): 2631# Formerly there was an America/Ensenada zone, which differed from 2632# America/Tijuana only in that it did not observe DST from 1976 2633# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2634# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 2635# that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and 2636# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 2637# DST-observance was a town-by-town matter back then. This concerns 2638# data after 1970 so most likely there should be at least one Zone 2639# other than America/Tijuana for Baja, but it's not clear yet what its 2640# name or contents should be. 2641# 2642# From Paul Eggert (2015-10-08): 2643# Formerly there was an America/Santa_Isabel zone, but this appears to 2644# have come from a misreading of 2645# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2646# It has been moved to the 'backward' file. 2647# 2648# 2649# Revillagigedo Is 2650# no information 2651 2652############################################################################### 2653 2654# Anguilla 2655# Antigua and Barbuda 2656# See America/Port_of_Spain. 2657 2658# Bahamas 2659# 2660# For 1899 Milne gives -5:09:29.5; round that. 2661# 2662# From Sue Williams (2006-12-07): 2663# The Bahamas announced about a month ago that they plan to change their DST 2664# rules to sync with the U.S. starting in 2007.... 2665# http://www.jonesbahamas.com/?c=45&a=10412 2666 2667# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2668Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S 2669Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D 2670# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2671Zone America/Nassau -5:09:30 - LMT 1912 Mar 2 2672 -5:00 Bahamas E%sT 1976 2673 -5:00 US E%sT 2674 2675# Barbados 2676 2677# For 1899 Milne gives -3:58:29.2; round that. 2678 2679# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2680Rule Barb 1977 only - Jun 12 2:00 1:00 D 2681Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 2682Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 2683Rule Barb 1979 only - Sep 30 2:00 0 S 2684Rule Barb 1980 only - Sep 25 2:00 0 S 2685# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2686Zone America/Barbados -3:58:29 - LMT 1924 # Bridgetown 2687 -3:58:29 - BMT 1932 # Bridgetown Mean Time 2688 -4:00 Barb A%sT 2689 2690# Belize 2691# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. 2692# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2693Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 2694Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 2695Rule Belize 1973 only - Dec 5 0:00 1:00 D 2696Rule Belize 1974 only - Feb 9 0:00 0 S 2697Rule Belize 1982 only - Dec 18 0:00 1:00 D 2698Rule Belize 1983 only - Feb 12 0:00 0 S 2699# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2700Zone America/Belize -5:52:48 - LMT 1912 Apr 2701 -6:00 Belize C%sT 2702 2703# Bermuda 2704 2705# For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower, 2706# Bermuda dockyard, Ireland I; round that. 2707 2708# From Dan Jones, reporting in The Royal Gazette (2006-06-26): 2709 2710# Next year, however, clocks in the US will go forward on the second Sunday 2711# in March, until the first Sunday in November. And, after the Time Zone 2712# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 2713# Friday, the same thing will happen in Bermuda. 2714# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 2715 2716# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2717Zone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton 2718 -4:00 - AST 1974 Apr 28 2:00 2719 -4:00 Canada A%sT 1976 2720 -4:00 US A%sT 2721 2722# Cayman Is 2723# See America/Panama. 2724 2725# Costa Rica 2726 2727# Milne gives -5:36:13.3 as San Jos�� mean time; round to nearest. 2728 2729# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2730Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D 2731Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S 2732Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 2733# IATA SSIM (1991-09) says the following was at 1:00; 2734# go with Shanks & Pottenger. 2735Rule CR 1991 only - Jul 1 0:00 0 S 2736Rule CR 1992 only - Mar 15 0:00 0 S 2737# There are too many San Jos��s elsewhere, so we'll use 'Costa Rica'. 2738# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2739Zone America/Costa_Rica -5:36:13 - LMT 1890 # San Jos�� 2740 -5:36:13 - SJMT 1921 Jan 15 # San Jos�� Mean Time 2741 -6:00 CR C%sT 2742# Coco 2743# no information; probably like America/Costa_Rica 2744 2745# Cuba 2746 2747# From Paul Eggert (2013-02-21): 2748# Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57 2749# for the port, and -5:30 for meteorological observations. 2750# For now, stick with Shanks & Pottenger. 2751 2752# From Arthur David Olson (1999-03-29): 2753# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 2754# the Cuban National Team and the Baltimore Orioles was carried live on 2755# the Orioles Radio Network, including affiliate WTOP in Washington, DC. 2756# During the game, play-by-play announcer Jim Hunter noted that 2757# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 2758# Time today." (The "two hour" remark referred to losing one hour of 2759# sleep on 1999-03-28 - when the announcers were in Cuba as it switched 2760# to DST - and one more hour on 1999-04-04 - when the announcers will have 2761# returned to Baltimore, which switches on that date.) 2762 2763# From Steffen Thorsen (2013-11-11): 2764# DST start in Cuba in 2004 ... does not follow the same rules as the 2765# years before. The correct date should be Sunday 2004-03-28 00:00 ... 2766# https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html 2767 2768# From Evert van der Veer via Steffen Thorsen (2004-10-28): 2769# Cuba is not going back to standard time this year. 2770# From Paul Eggert (2006-03-22): 2771# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 2772# says that it's due to a problem at the Antonio Guiteras 2773# thermoelectric plant, and says "This October there will be no return 2774# to normal hours (after daylight saving time)". 2775# For now, let's assume that it's a temporary measure. 2776 2777# From Carlos A. Carnero Delgado (2005-11-12): 2778# This year (just like in 2004-2005) there's no change in time zone 2779# adjustment in Cuba. We will stay in daylight saving time: 2780# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 2781 2782# From Jesper N��rgaard Welen (2006-10-21): 2783# An article in GRANMA INTERNACIONAL claims that Cuba will end 2784# the 3 years of permanent DST next weekend, see 2785# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 2786# "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 2787# watches should be set back one hour - going back to 00:00 hours - returning 2788# to the normal schedule.... 2789 2790# From Paul Eggert (2007-03-02): 2791# <http://www.granma.cubaweb.cu/english/news/art89.html>, dated yesterday, 2792# says Cuban clocks will advance at midnight on March 10. 2793# For lack of better information, assume Cuba will use US rules, 2794# except that it switches at midnight standard time as usual. 2795# 2796# From Steffen Thorsen (2007-10-25): 2797# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week 2798# earlier - on the last Sunday of October, just like in 2006. 2799# 2800# He supplied these references: 2801# 2802# http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES 2803# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm 2804# 2805# From Alex Krivenyshev (2007-10-25): 2806# Here is also article from Granma (Cuba): 2807# 2808# Regir�� el Horario Normal desde el pr��ximo domingo 28 de octubre 2809# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html 2810# 2811# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html 2812 2813# From Arthur David Olson (2008-03-09): 2814# I'm in Maryland which is now observing United States Eastern Daylight 2815# Time. At 9:44 local time I used RealPlayer to listen to 2816# http://media.enet.cu/radioreloj 2817# a Cuban information station, and heard 2818# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), 2819# indicating that Cuba is still on standard time. 2820 2821# From Steffen Thorsen (2008-03-12): 2822# It seems that Cuba will start DST on Sunday, 2007-03-16... 2823# It was announced yesterday, according to this source (in Spanish): 2824# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm 2825# 2826# Some more background information is posted here: 2827# http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html 2828# 2829# The article also says that Cuba has been observing DST since 1963, 2830# while Shanks (and tzdata) has 1965 as the first date (except in the 2831# 1940's). Many other web pages in Cuba also claim that it has been 2832# observed since 1963, but with the exception of 1970 - an exception 2833# which is not present in tzdata/Shanks. So there is a chance we need to 2834# change some historic records as well. 2835# 2836# One example: 2837# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm 2838 2839# From Jesper N��rgaard Welen (2008-03-13): 2840# The Cuban time change has just been confirmed on the most authoritative 2841# web site, the Granma. Please check out 2842# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html 2843# 2844# Basically as expected after Steffen Thorsen's information, the change 2845# will take place midnight between Saturday and Sunday. 2846 2847# From Arthur David Olson (2008-03-12): 2848# Assume Sun>=15 (third Sunday) going forward. 2849 2850# From Alexander Krivenyshev (2009-03-04) 2851# According to the Radio Reloj - Cuba will start Daylight Saving Time on 2852# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- 2853# not on midnight March 14 / March 15 as previously thought. 2854# 2855# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html 2856# (in Spanish) 2857 2858# From Arthur David Olson (2009-03-09) 2859# I listened over the Internet to 2860# http://media.enet.cu/readioreloj 2861# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the 2862# the time was announced as "diez cinco" - the same time as here, indicating 2863# that has indeed switched to DST. Assume second Sunday from 2009 forward. 2864 2865# From Steffen Thorsen (2011-03-08): 2866# Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00 2867# this year. Nothing about the end date known so far (if that has 2868# changed at all). 2869# 2870# Source: 2871# http://granma.co.cu/2011/03/08/nacional/artic01.html 2872# 2873# Our info: 2874# http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html 2875# 2876# From Steffen Thorsen (2011-10-30) 2877# Cuba will end DST two weeks later this year. Instead of going back 2878# tonight, it has been delayed to 2011-11-13 at 01:00. 2879# 2880# One source (Spanish) 2881# http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html 2882# 2883# Our page: 2884# http://www.timeanddate.com/news/time/cuba-time-changes-2011.html 2885# 2886# From Steffen Thorsen (2012-03-01) 2887# According to Radio Reloj, Cuba will start DST on Midnight between March 2888# 31 and April 1. 2889# 2890# Radio Reloj has the following info (Spanish): 2891# http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril 2892# 2893# Our info on it: 2894# http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html 2895 2896# From Steffen Thorsen (2012-11-03): 2897# Radio Reloj and many other sources report that Cuba is changing back 2898# to standard time on 2012-11-04: 2899# http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre 2900# From Paul Eggert (2012-11-03): 2901# For now, assume the future rule is first Sunday in November. 2902 2903# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2904Rule Cuba 1928 only - Jun 10 0:00 1:00 D 2905Rule Cuba 1928 only - Oct 10 0:00 0 S 2906Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 2907Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 2908Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 2909Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 2910Rule Cuba 1965 only - Jun 1 0:00 1:00 D 2911Rule Cuba 1965 only - Sep 30 0:00 0 S 2912Rule Cuba 1966 only - May 29 0:00 1:00 D 2913Rule Cuba 1966 only - Oct 2 0:00 0 S 2914Rule Cuba 1967 only - Apr 8 0:00 1:00 D 2915Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 2916Rule Cuba 1968 only - Apr 14 0:00 1:00 D 2917Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 2918Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S 2919Rule Cuba 1972 1974 - Oct 8 0:00 0 S 2920Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S 2921Rule Cuba 1978 only - May 7 0:00 1:00 D 2922Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 2923Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 2924Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 2925Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 2926Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 2927Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 2928Rule Cuba 1996 only - Oct 6 0:00s 0 S 2929Rule Cuba 1997 only - Oct 12 0:00s 0 S 2930Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 2931Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 2932Rule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D 2933Rule Cuba 2004 only - Mar lastSun 0:00s 1:00 D 2934Rule Cuba 2006 2010 - Oct lastSun 0:00s 0 S 2935Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D 2936Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D 2937Rule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D 2938Rule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D 2939Rule Cuba 2011 only - Nov 13 0:00s 0 S 2940Rule Cuba 2012 only - Apr 1 0:00s 1:00 D 2941Rule Cuba 2012 max - Nov Sun>=1 0:00s 0 S 2942Rule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D 2943 2944# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2945Zone America/Havana -5:29:28 - LMT 1890 2946 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 2947 -5:00 Cuba C%sT 2948 2949# Dominica 2950# See America/Port_of_Spain. 2951 2952# Dominican Republic 2953 2954# From Steffen Thorsen (2000-10-30): 2955# Enrique Morales reported to me that the Dominican Republic has changed the 2956# time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 2957# http://www.listin.com.do/antes/261000/republica/princi.html 2958 2959# From Paul Eggert (2000-12-04): 2960# That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 2961 2962# From Rives McDow (2000-12-01): 2963# Dominican Republic changed its mind and presidential decree on Tuesday, 2964# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 2965# Dominican Republic will be reverting to 8 hours from the International Date 2966# Line, and will not be using DST in the foreseeable future. The reason they 2967# decided to use DST was to be in synch with Puerto Rico, who was also going 2968# to implement DST. When Puerto Rico didn't implement DST, the president 2969# decided to revert. 2970 2971 2972# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2973Rule DR 1966 only - Oct 30 0:00 1:00 D 2974Rule DR 1967 only - Feb 28 0:00 0 S 2975Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 2976Rule DR 1970 only - Feb 21 0:00 0 S 2977Rule DR 1971 only - Jan 20 0:00 0 S 2978Rule DR 1972 1974 - Jan 21 0:00 0 S 2979# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2980Zone America/Santo_Domingo -4:39:36 - LMT 1890 2981 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 2982 -5:00 DR E%sT 1974 Oct 27 2983 -4:00 - AST 2000 Oct 29 2:00 2984 -5:00 US E%sT 2000 Dec 3 1:00 2985 -4:00 - AST 2986 2987# El Salvador 2988 2989# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2990Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 2991Rule Salv 1987 1988 - Sep lastSun 0:00 0 S 2992# There are too many San Salvadors elsewhere, so use America/El_Salvador 2993# instead of America/San_Salvador. 2994# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2995Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 2996 -6:00 Salv C%sT 2997 2998# Grenada 2999# Guadeloupe 3000# St Barth��lemy 3001# St Martin (French part) 3002# See America/Port_of_Spain. 3003 3004# Guatemala 3005# 3006# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 3007# Diario Co Latino, at 3008# <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>, 3009# says in an article dated 2006-04-19 that the Guatemalan government had 3010# decided on that date to advance official time by 60 minutes, to lessen the 3011# impact of the elevated cost of oil.... Daylight saving time will last from 3012# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 3013# From Paul Eggert (2006-06-22): 3014# The Ministry of Energy and Mines, press release CP-15/2006 3015# (2006-04-19), says DST ends at 24:00. See 3016# http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf 3017 3018# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3019Rule Guat 1973 only - Nov 25 0:00 1:00 D 3020Rule Guat 1974 only - Feb 24 0:00 0 S 3021Rule Guat 1983 only - May 21 0:00 1:00 D 3022Rule Guat 1983 only - Sep 22 0:00 0 S 3023Rule Guat 1991 only - Mar 23 0:00 1:00 D 3024Rule Guat 1991 only - Sep 7 0:00 0 S 3025Rule Guat 2006 only - Apr 30 0:00 1:00 D 3026Rule Guat 2006 only - Oct 1 0:00 0 S 3027# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3028Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5 3029 -6:00 Guat C%sT 3030 3031# Haiti 3032# From Gwillim Law (2005-04-15): 3033# Risto O. Nyk��nen wrote me that Haiti is now on DST. 3034# I searched for confirmation, and I found a press release 3035# on the Web page of the Haitian Consulate in Chicago (2005-03-31), 3036# <http://www.haitianconsulate.org/time.doc>. Translated from French, it says: 3037# 3038# "The Prime Minister's Communication Office notifies the public in general 3039# and the press in particular that, following a decision of the Interior 3040# Ministry and the Territorial Collectivities [I suppose that means the 3041# provinces], Haiti will move to Eastern Daylight Time in the night from next 3042# Saturday the 2nd to Sunday the 3rd. 3043# 3044# "Consequently, the Prime Minister's Communication Office wishes to inform 3045# the population that the country's clocks will be set forward one hour 3046# starting at midnight. This provision will hold until the last Saturday in 3047# October 2005. 3048# 3049# "Port-au-Prince, March 31, 2005" 3050# 3051# From Steffen Thorsen (2006-04-04): 3052# I have been informed by users that Haiti observes DST this year like 3053# last year, so the current "only" rule for 2005 might be changed to a 3054# "max" rule or to last until 2006. (Who knows if they will observe DST 3055# next year or if they will extend their DST like US/Canada next year). 3056# 3057# I have found this article about it (in French): 3058# http://www.haitipressnetwork.com/news.cfm?articleID=7612 3059# 3060# The reason seems to be an energy crisis. 3061 3062# From Stephen Colebourne (2007-02-22): 3063# Some IATA info: Haiti won't be having DST in 2007. 3064 3065# From Steffen Thorsen (2012-03-11): 3066# According to several news sources, Haiti will observe DST this year, 3067# apparently using the same start and end date as USA/Canada. 3068# So this means they have already changed their time. 3069# 3070# http://www.alterpresse.org/spip.php?article12510 3071# http://radiovision2000haiti.net/home/?p=13253 3072# 3073# From Arthur David Olson (2012-03-11): 3074# The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to 3075# 3:00 a.m. rather than the traditional Haitian jump at midnight. 3076# Assume a US-style fall back as well. 3077 3078# From Steffen Thorsen (2013-03-10): 3079# It appears that Haiti is observing DST this year as well, same rules 3080# as US/Canada. They did it last year as well, and it looks like they 3081# are going to observe DST every year now... 3082# 3083# http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/ 3084# http://www.canalplushaiti.net/?p=6714 3085 3086# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3087Rule Haiti 1983 only - May 8 0:00 1:00 D 3088Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 3089Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S 3090# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 3091# Go with IATA. 3092Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 3093Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 3094Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 3095Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S 3096Rule Haiti 2012 max - Mar Sun>=8 2:00 1:00 D 3097Rule Haiti 2012 max - Nov Sun>=1 2:00 0 S 3098# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3099Zone America/Port-au-Prince -4:49:20 - LMT 1890 3100 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 3101 -5:00 Haiti E%sT 3102 3103# Honduras 3104# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 3105 3106# From Paul Eggert (2006-05-05): 3107# worldtimezone.com reports a 2006-05-02 Spanish-language AP article 3108# saying Honduras will start using DST midnight Saturday, effective 4 3109# months until September. La Tribuna reported today 3110# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 3111# of Honduras, refused to back down on this. 3112 3113# From Jesper N��rgaard Welen (2006-08-08): 3114# It seems that Honduras has returned from DST to standard time this Monday at 3115# 00:00 hours (prolonging Sunday to 25 hours duration). 3116# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html 3117 3118# From Paul Eggert (2006-08-08): 3119# Also see Diario El Heraldo, The country returns to standard time (2006-08-08). 3120# http://www.elheraldo.hn/nota.php?nid=54941&sec=12 3121# It mentions executive decree 18-2006. 3122 3123# From Steffen Thorsen (2006-08-17): 3124# Honduras will observe DST from 2007 to 2009, exact dates are not 3125# published, I have located this authoritative source: 3126# http://www.presidencia.gob.hn/noticia.aspx?nId=47 3127 3128# From Steffen Thorsen (2007-03-30): 3129# http://www.laprensahn.com/pais_nota.php?id04962=7386 3130# So it seems that Honduras will not enter DST this year.... 3131 3132# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3133Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 3134Rule Hond 1987 1988 - Sep lastSun 0:00 0 S 3135Rule Hond 2006 only - May Sun>=1 0:00 1:00 D 3136Rule Hond 2006 only - Aug Mon>=1 0:00 0 S 3137# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3138Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 3139 -6:00 Hond C%sT 3140# 3141# Great Swan I ceded by US to Honduras in 1972 3142 3143# Jamaica 3144# Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an 3145# unspecified official document, and says "This time is used throughout the 3146# island". Go with Milne. Round to the nearest second as required by zic. 3147# 3148# Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but 3149# Lance Neita writes that Prime Minister Michael Manley decreed it January 5. 3150# Assume Neita meant Jan 6 02:00, the same as the US. Neita also writes that 3151# Manley's supporters associated this act with Manley's nickname "Joshua" 3152# (recall that in the Bible the sun stood still at Joshua's request), 3153# and with the Rod of Correction which Manley said he had received from 3154# Haile Selassie, Emperor of Ethiopia. See: 3155# Neita L. The politician in all of us. Jamaica Observer 2014-09-20 3156# http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647 3157# 3158# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3159Zone America/Jamaica -5:07:11 - LMT 1890 # Kingston 3160 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3161 -5:00 - EST 1974 3162 -5:00 US E%sT 1984 3163 -5:00 - EST 3164 3165# Martinique 3166# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3167Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 3168 -4:04:20 - FFMT 1911 May # Fort-de-France MT 3169 -4:00 - AST 1980 Apr 6 3170 -4:00 1:00 ADT 1980 Sep 28 3171 -4:00 - AST 3172 3173# Montserrat 3174# See America/Port_of_Spain. 3175 3176# Nicaragua 3177# 3178# This uses Shanks & Pottenger for times before 2005. 3179# 3180# From Steffen Thorsen (2005-04-12): 3181# I've got reports from 8 different people that Nicaragua just started 3182# DST on Sunday 2005-04-10, in order to save energy because of 3183# expensive petroleum. The exact end date for DST is not yet 3184# announced, only "September" but some sites also say "mid-September". 3185# Some background information is available on the President's official site: 3186# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 3187# The Decree, no 23-2005 is available here: 3188# 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 3189# 3190# From Paul Eggert (2005-05-01): 3191# The decree doesn't say anything about daylight saving, but for now let's 3192# assume that it is daylight saving.... 3193# 3194# From Gwillim Law (2005-04-21): 3195# The Associated Press story on the time change, which can be found at 3196# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 3197# and elsewhere, says (fifth paragraph, translated from Spanish): "The last 3198# time that a change of clocks was applied to save energy was in the year 2000 3199# during the Arnoldo Alem��n administration."... 3200# The northamerica file says that Nicaragua has been on UTC-6 continuously 3201# since December 1998. I wasn't able to find any details of Nicaraguan time 3202# changes in 2000. Perhaps a note could be added to the northamerica file, to 3203# the effect that we have indirect evidence that DST was observed in 2000. 3204# 3205# From Jesper N��rgaard Welen (2005-11-02): 3206# Nicaragua left DST the 2005-10-02 at 00:00 (local time). 3207# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 3208# (2005-09-26) 3209# 3210# From Jesper N��rgaard Welen (2006-05-05): 3211# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 3212# (my informal translation) 3213# By order of the president of the republic, Enrique Bola��os, Nicaragua 3214# advanced by sixty minutes their official time, yesterday at 2 in the 3215# morning, and will stay that way until 30th of September. 3216# 3217# From Jesper N��rgaard Welen (2006-09-30): 3218# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf 3219# My informal translation runs: 3220# The natural sun time is restored in all the national territory, in that the 3221# time is returned one hour at 01:00 am of October 1 of 2006. 3222# 3223# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3224Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 3225Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 3226Rule Nic 2005 only - Apr 10 0:00 1:00 D 3227Rule Nic 2005 only - Oct Sun>=1 0:00 0 S 3228Rule Nic 2006 only - Apr 30 2:00 1:00 D 3229Rule Nic 2006 only - Oct Sun>=1 1:00 0 S 3230# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3231Zone America/Managua -5:45:08 - LMT 1890 3232 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 3233 -6:00 - CST 1973 May 3234 -5:00 - EST 1975 Feb 16 3235 -6:00 Nic C%sT 1992 Jan 1 4:00 3236 -5:00 - EST 1992 Sep 24 3237 -6:00 - CST 1993 3238 -5:00 - EST 1997 3239 -6:00 Nic C%sT 3240 3241# Panama 3242# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3243Zone America/Panama -5:18:08 - LMT 1890 3244 -5:19:36 - CMT 1908 Apr 22 # Col��n Mean Time 3245 -5:00 - EST 3246Link America/Panama America/Cayman 3247 3248# Puerto Rico 3249# There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'. 3250# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3251Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 3252 -4:00 - AST 1942 May 3 3253 -4:00 US A%sT 1946 3254 -4:00 - AST 3255 3256# St Kitts-Nevis 3257# St Lucia 3258# See America/Port_of_Spain. 3259 3260# St Pierre and Miquelon 3261# There are too many St Pierres elsewhere, so we'll use 'Miquelon'. 3262# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3263Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 3264 -4:00 - AST 1980 May 3265 -3:00 - PMST 1987 # Pierre & Miquelon Time 3266 -3:00 Canada PM%sT 3267 3268# St Vincent and the Grenadines 3269# See America/Port_of_Spain. 3270 3271# Turks and Caicos 3272# 3273# From Chris Dunn in 3274# http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007 3275# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the 3276# daylight saving dates for time changes have been adjusted to match 3277# the recent U.S. change of dates. 3278# 3279# From Brian Inglis (2007-04-28): 3280# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 3281# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 3282# rows before that there is an out of date entry for Oct: 3283# "Eastern Standard Times Begins 2007 3284# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 3285# indicating that the normal ET rules are followed. 3286# 3287# From Paul Eggert (2014-08-19): 3288# The 2014-08-13 Cabinet meeting decided to stay on UTC-4 year-round. See: 3289# http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm 3290# Model this as a switch from EST/EDT to AST ... 3291# From Chris Walton (2014-11-04): 3292# ... the TCI government appears to have delayed the switch to 3293# "permanent daylight saving time" by one year.... 3294# http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm 3295# 3296# Zone NAME GMTOFF RULES FORMAT [UNTIL] 3297Zone America/Grand_Turk -4:44:32 - LMT 1890 3298 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3299 -5:00 - EST 1979 3300 -5:00 US E%sT 2015 Nov Sun>=1 2:00 3301 -4:00 - AST 3302 3303# British Virgin Is 3304# Virgin Is 3305# See America/Port_of_Spain. 3306 3307 3308# Local Variables: 3309# coding: utf-8 3310# End: 3311