northamerica revision 218122
1153761Swollman# <pre> 2218122Sedwin# %W% 3192886Sedwin# This file is in the public domain, so clarified as of 4192886Sedwin# 2009-05-17 by Arthur David Olson. 5153761Swollman 62742Swollman# also includes Central America and the Caribbean 72742Swollman 82742Swollman# This data is by no means authoritative; if you think you know better, 92742Swollman# go ahead and edit the file (and please send any changes to 102742Swollman# tz@elsie.nci.nih.gov for general use in the future). 112742Swollman 12149514Swollman# From Paul Eggert (1999-03-22): 132742Swollman# A reliable and entertaining source about time zones is 1458787Sru# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). 152742Swollman 162742Swollman############################################################################### 172742Swollman 182742Swollman# United States 192742Swollman 2058787Sru# From Paul Eggert (1999-03-31): 2158787Sru# Howse writes (pp 121-125) that time zones were invented by 2258787Sru# Professor Charles Ferdinand Dowd (1825-1904), 2358787Sru# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). 2458787Sru# His pamphlet ``A System of National Time for Railroads'' (1870) 2558787Sru# was the result of his proposals at the Convention of Railroad Trunk Lines 2658787Sru# in New York City (1869-10). His 1870 proposal was based on Washington, DC, 2758787Sru# but in 1872-05 he moved the proposed origin to Greenwich. 2858787Sru# His proposal was adopted by the railroads on 1883-11-18 at 12:00, 2958787Sru# and the most of the country soon followed suit. 3058787Sru 31149514Swollman# From Paul Eggert (2005-04-16): 32149514Swollman# That 1883 transition occurred at 12:00 new time, not at 12:00 old time. 33149514Swollman# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). 34149514Swollman 35158421Swollman# From Paul Eggert (2006-03-22): 3614343Swollman# A good source for time zone historical data in the US is 3714343Swollman# Thomas G. Shanks, The American Atlas (5th edition), 3814343Swollman# San Diego: ACS Publications, Inc. (1991). 3914343Swollman# Make sure you have the errata sheet; the book is somewhat useless without it. 40158421Swollman# It is the source for most of the pre-1991 US entries below. 4114343Swollman 4275267Swollman# From Paul Eggert (2001-03-06): 4317200Swollman# Daylight Saving Time was first suggested as a joke by Benjamin Franklin 4475267Swollman# in his whimsical essay ``An Economical Project for Diminishing the Cost 4575267Swollman# of Light'' published in the Journal de Paris (1784-04-26). 4617200Swollman# Not everyone is happy with the results: 4717200Swollman# 4817200Swollman# I don't really care how time is reckoned so long as there is some 4917200Swollman# agreement about it, but I object to being told that I am saving 5017200Swollman# daylight when my reason tells me that I am doing nothing of the kind. 5117200Swollman# I even object to the implication that I am wasting something 5217200Swollman# valuable if I stay in bed after the sun has risen. As an admirer 5317200Swollman# of moonlight I resent the bossy insistence of those who want to 5417200Swollman# reduce my time for enjoying it. At the back of the Daylight Saving 5517200Swollman# scheme I detect the bony, blue-fingered hand of Puritanism, eager 5617200Swollman# to push people into bed earlier, and get them up earlier, to make 5717200Swollman# them healthy, wealthy and wise in spite of themselves. 5817200Swollman# 59149514Swollman# -- Robertson Davies, The diary of Samuel Marchbanks, 60149514Swollman# Clarke, Irwin (1947), XIX, Sunday 6175267Swollman# 6275267Swollman# For more about the first ten years of DST in the United States, see 6375267Swollman# Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html"> 6475267Swollman# Ten years of daylight saving from the Pittsburgh standpoint 6575267Swollman# (Carnegie Library of Pittsburgh, 1927)</a>. 6675267Swollman# 6775267Swollman# Shanks says that DST was called "War Time" in the US in 1918 and 1919. 6875267Swollman# However, DST was imposed by the Standard Time Act of 1918, which 6975267Swollman# was the first nationwide legal time standard, and apparently 7075267Swollman# time was just called "Standard Time" or "Daylight Saving Time". 7117200Swollman 722742Swollman# From Arthur David Olson: 732742Swollman# US Daylight Saving Time ended on the last Sunday of *October* in 1974. 7419878Swollman# See, for example, the front page of the Saturday, 1974-10-26 7519878Swollman# and Sunday, 1974-10-27 editions of the Washington Post. 762742Swollman 772742Swollman# From Arthur David Olson: 782742Swollman# Before the Uniform Time Act of 1966 took effect in 1967, observance of 792742Swollman# Daylight Saving Time in the US was by local option, except during wartime. 802742Swollman 8167578Swollman# From Arthur David Olson (2000-09-25): 8267578Swollman# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. 8367578Swollman# In the introduction, Oboler spoke of "Eastern Peace Time." 8467578Swollman# An AltaVista search turned up 8567578Swollman# <a href="http://rowayton.org/rhs/hstaug45.html">: 8667578Swollman# "When the time is announced over the radio now, it is 'Eastern Peace 8767578Swollman# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." 8867578Swollman# </a> (August 1945) by way of confirmation. 8967578Swollman 90149514Swollman# From Joseph Gallant citing 9167578Swollman# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): 9267578Swollman# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set 9386222Swollman# to switch to London for Attlee's address, but the American people 9467578Swollman# never got to hear his speech live. According to one press account, 9567578Swollman# CBS' Bob Trout was first to announce the word of Japan's surrender, 9667578Swollman# but a few seconds later, NBC, ABC and Mutual also flashed the word 9767578Swollman# of surrender, all of whom interrupting the bells of Big Ben in 9886222Swollman# London which were to precede Mr. Attlee's speech. 9967578Swollman 100114173Swollman# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From 101114173Swollman# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: 102114173Swollman# 103114173Swollman# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. 104114173Swollman# Any announcement from Asia would reach St. John's New York newsroom on a 105114173Swollman# wire service teletype machine, which had prescribed signals for major news. 106114173Swollman# Associated Press, for example, would ring five bells before spewing out 107114173Swollman# typed copy of an important story, and 10 bells for news "of transcendental 108114173Swollman# importance." 109114173Swollman# 110114173Swollman# On Aug. 14, stalling while talking steadily into the NBC networks' open 111114173Swollman# microphone, St. John heard five bells and waited only to hear a sixth bell, 112114173Swollman# before announcing confidently: "Ladies and gentlemen, World War II is over. 113114173Swollman# The Japanese have agreed to our surrender terms." 114114173Swollman# 115114173Swollman# He had scored a 20-second scoop on other broadcasters. 116114173Swollman 117149590Swollman# From Arthur David Olson (2005-08-22): 118149590Swollman# Paul has been careful to use the "US" rules only in those locations 119149590Swollman# that are part of the United States; this reflects the real scope of 120149590Swollman# U.S. government action. So even though the "US" rules have changed 121149590Swollman# in the latest release, other countries won't be affected. 122149590Swollman 1232742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 12475267SwollmanRule US 1918 1919 - Mar lastSun 2:00 1:00 D 1252742SwollmanRule US 1918 1919 - Oct lastSun 2:00 0 S 1262742SwollmanRule US 1942 only - Feb 9 2:00 1:00 W # War 12767578SwollmanRule US 1945 only - Aug 14 23:00u 1:00 P # Peace 1282742SwollmanRule US 1945 only - Sep 30 2:00 0 S 129149514SwollmanRule US 1967 2006 - Oct lastSun 2:00 0 S 1302742SwollmanRule US 1967 1973 - Apr lastSun 2:00 1:00 D 1312742SwollmanRule US 1974 only - Jan 6 2:00 1:00 D 1322742SwollmanRule US 1975 only - Feb 23 2:00 1:00 D 1332742SwollmanRule US 1976 1986 - Apr lastSun 2:00 1:00 D 134149514SwollmanRule US 1987 2006 - Apr Sun>=1 2:00 1:00 D 135149514SwollmanRule US 2007 max - Mar Sun>=8 2:00 1:00 D 136149514SwollmanRule US 2007 max - Nov Sun>=1 2:00 0 S 1372742Swollman 138153761Swollman# From Arthur David Olson, 2005-12-19 139153761Swollman# We generate the files specified below to guard against old files with 140153761Swollman# obsolete information being left in the time zone binary directory. 141153761Swollman# We limit the list to names that have appeared in previous versions of 142153761Swollman# this time zone package. 143153761Swollman# We do these as separate Zones rather than as Links to avoid problems if 144153761Swollman# a particular place changes whether it observes DST. 145153761Swollman# We put these specifications here in the northamerica file both to 146153761Swollman# increase the chances that they'll actually get compiled and to 147153761Swollman# avoid the need to duplicate the US rules in another file. 148153761Swollman 149153761Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 150153761SwollmanZone EST -5:00 - EST 151153761SwollmanZone MST -7:00 - MST 152153761SwollmanZone HST -10:00 - HST 153153761SwollmanZone EST5EDT -5:00 US E%sT 154153761SwollmanZone CST6CDT -6:00 US C%sT 155153761SwollmanZone MST7MDT -7:00 US M%sT 156153761SwollmanZone PST8PDT -8:00 US P%sT 157153761Swollman 15819878Swollman# From Bob Devine (1988-01-28): 1592742Swollman# ...Alaska (and Hawaii) had the timezone names changed in 1967. 1602742Swollman# old new 1612742Swollman# Pacific Standard Time(PST) -same- 1622742Swollman# Yukon Standard Time(YST) -same- 1632742Swollman# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) 1642742Swollman# Nome Standard Time (NT) Bering Standard Time (BST) 1652742Swollman# 1662742Swollman# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. 1672742Swollman# The YST zone now covers nearly all of the state, AHST just part 1682742Swollman# of the Aleutian islands. No DST. 1692742Swollman 17014343Swollman# From Paul Eggert (1995-12-19): 17114343Swollman# The tables below use `NST', not `NT', for Nome Standard Time. 17214343Swollman# I invented `CAWT' for Central Alaska War Time. 17314343Swollman 17419878Swollman# From U. S. Naval Observatory (1989-01-19): 1752742Swollman# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON 1762742Swollman# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 1772742Swollman# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON 1782742Swollman# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 1792742Swollman# USA MOUNTAIN 7 H BEHIND UTC DENVER 1802742Swollman# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 1812742Swollman# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO 1822742Swollman# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 1832742Swollman# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) 1842742Swollman# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) 1852742Swollman# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W 1862742Swollman# USA - " - 9 H BEHIND UTC APR 3 - OCT 30 1872742Swollman# USA HAWAII 10 H BEHIND UTC 1882742Swollman# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY 1892742Swollman 19019878Swollman# From Arthur David Olson (1989-01-21): 1912742Swollman# The above dates are for 1988. 1922742Swollman# Note the "AKST" and "AKDT" abbreviations, the claim that there's 1932742Swollman# no DST in Samoa, and the claim that there is DST in Alaska and the 1942742Swollman# Aleutians. 1952742Swollman 19619878Swollman# From Arthur David Olson (1988-02-13): 1972742Swollman# Legal standard time zone names, from United States Code (1982 Edition and 1982742Swollman# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names 19919878Swollman# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 2002742Swollman# took effect), as explained in sections 263 and 261: 2012742Swollman# (none) 2022742Swollman# United States standard eastern time 2032742Swollman# United States standard mountain time 2042742Swollman# United States standard central time 2052742Swollman# United States standard Pacific time 2062742Swollman# (none) 2072742Swollman# United States standard Alaska time 2082742Swollman# (none) 20919878Swollman# Next, names from 1967-04-01 until 1983-11-30 (the date for 2102742Swollman# public law 98-181): 2112742Swollman# Atlantic standard time 2122742Swollman# eastern standard time 2132742Swollman# central standard time 2142742Swollman# mountain standard time 2152742Swollman# Pacific standard time 2162742Swollman# Yukon standard time 2172742Swollman# Alaska-Hawaii standard time 2182742Swollman# Bering standard time 21919878Swollman# And after 1983-11-30: 2202742Swollman# Atlantic standard time 2212742Swollman# eastern standard time 2222742Swollman# central standard time 2232742Swollman# mountain standard time 2242742Swollman# Pacific standard time 2252742Swollman# Alaska standard time 2262742Swollman# Hawaii-Aleutian standard time 2272742Swollman# Samoa standard time 2282742Swollman# The law doesn't give abbreviations. 22914343Swollman# 23075267Swollman# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: 23175267Swollman# Public law 106-564 (2000-12-23) introduced the abbreviation 23275267Swollman# "Chamorro Standard Time" for time in Guam and the Northern Marianas. 23375267Swollman# See the file "australasia". 234158421Swollman 235149514Swollman# From Arthur David Olson, 2005-08-09 236149514Swollman# The following was signed into law on 2005-08-08. 237149514Swollman# 238149514Swollman# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. 239149514Swollman# (a) Amendment- Section 3(a) of the Uniform Time Act of 1966 (15 240149514Swollman# U.S.C. 260a(a)) is amended-- 241149514Swollman# (1) by striking `first Sunday of April' and inserting `second 242149514Swollman# Sunday of March'; and 243149514Swollman# (2) by striking `last Sunday of October' and inserting `first 244149514Swollman# Sunday of November'. 245149514Swollman# (b) Effective Date- Subsection (a) shall take effect 1 year after the 246149514Swollman# date of enactment of this Act or March 1, 2007, whichever is later. 247149514Swollman# (c) Report to Congress- Not later than 9 months after the effective 248149514Swollman# date stated in subsection (b), the Secretary shall report to Congress 249149514Swollman# on the impact of this section on energy consumption in the United 250149514Swollman# States. 251149514Swollman# (d) Right to Revert- Congress retains the right to revert the 252149514Swollman# Daylight Saving Time back to the 2005 time schedules once the 253149514Swollman# Department study is complete. 2542742Swollman 25586222Swollman# US eastern time, represented by New York 25675267Swollman 25767578Swollman# Connecticut, Delaware, District of Columbia, most of Florida, 258149590Swollman# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky 259149590Swollman# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, 260114173Swollman# New Hampshire, New Jersey, New York, North Carolina, Ohio, 261114173Swollman# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 262114173Swollman# Vermont, Virginia, West Virginia 26367578Swollman 264149514Swollman# From Dave Cantor (2004-11-02): 265149514Swollman# Early this summer I had the occasion to visit the Mount Washington 266149514Swollman# Observatory weather station atop (of course!) Mount Washington [, NH].... 267149514Swollman# One of the staff members said that the station was on Eastern Standard Time 268149514Swollman# and didn't change their clocks for Daylight Saving ... so that their 269149514Swollman# reports will always have times which are 5 hours behind UTC. 270149514Swollman 271153670Swollman# From Paul Eggert (2005-08-26): 272153670Swollman# According to today's Huntsville Times 273153670Swollman# <http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1> 274153670Swollman# a few towns on Alabama's "eastern border with Georgia, such as Phenix City 275153670Swollman# in Russell County, Lanett in Chambers County and some towns in Lee County, 276153670Swollman# set their watches and clocks on Eastern time." It quotes H.H. "Bubba" 277153670Swollman# Roberts, city administrator in Phenix City. as saying "We are in the Central 278153670Swollman# time zone, but we do go by the Eastern time zone because so many people work 279158421Swollman# in Columbus." 280153670Swollman 28114343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 28214343SwollmanRule NYC 1920 only - Mar lastSun 2:00 1:00 D 28314343SwollmanRule NYC 1920 only - Oct lastSun 2:00 0 S 28414343SwollmanRule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 28514343SwollmanRule NYC 1921 1954 - Sep lastSun 2:00 0 S 28614343SwollmanRule NYC 1955 1966 - Oct lastSun 2:00 0 S 28714343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 288149514SwollmanZone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 28914343Swollman -5:00 US E%sT 1920 29014343Swollman -5:00 NYC E%sT 1942 29114343Swollman -5:00 US E%sT 1946 29214343Swollman -5:00 NYC E%sT 1967 29314343Swollman -5:00 US E%sT 2942742Swollman 29586222Swollman# US central time, represented by Chicago 29667578Swollman 297136638Swollman# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, 298136638Swollman# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and 299136638Swollman# Washington counties), Illinois, western Indiana 300114173Swollman# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 301114173Swollman# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 302114173Swollman# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 303114173Swollman# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 304114173Swollman# western Tennessee, most of Texas, Wisconsin 30567578Swollman 306158421Swollman# From Larry M. Smith (2006-04-26) re Wisconsin: 307158421Swollman# http://www.legis.state.wi.us/statutes/Stat0175.pdf ... 308158421Swollman# is currently enforced at the 01:00 time of change. Because the local 309158421Swollman# "bar time" in the state corresponds to 02:00, a number of citations 310158421Swollman# are issued for the "sale of class 'B' alcohol after prohibited 311158421Swollman# hours" within the deviated hour of this change every year.... 312169811Swollman# 313169811Swollman# From Douglas R. Bomberg (2007-03-12): 314169811Swollman# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI 315169811Swollman# Statue 175 closer in synch with the US Congress' intent.... 316169811Swollman# http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf 317158421Swollman 31814343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 31914343SwollmanRule Chicago 1920 only - Jun 13 2:00 1:00 D 32014343SwollmanRule Chicago 1920 1921 - Oct lastSun 2:00 0 S 32114343SwollmanRule Chicago 1921 only - Mar lastSun 2:00 1:00 D 32214343SwollmanRule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 32314343SwollmanRule Chicago 1922 1954 - Sep lastSun 2:00 0 S 32414343SwollmanRule Chicago 1955 1966 - Oct lastSun 2:00 0 S 32514343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 326149514SwollmanZone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 32714343Swollman -6:00 US C%sT 1920 32814343Swollman -6:00 Chicago C%sT 1936 Mar 1 2:00 32914343Swollman -5:00 - EST 1936 Nov 15 2:00 33014343Swollman -6:00 Chicago C%sT 1942 33114343Swollman -6:00 US C%sT 1946 33214343Swollman -6:00 Chicago C%sT 1967 33314343Swollman -6:00 US C%sT 33486222Swollman# Oliver County, ND switched from mountain to central time on 1992-10-25. 335149514SwollmanZone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 33686222Swollman -7:00 US M%sT 1992 Oct 25 02:00 33786222Swollman -6:00 US C%sT 338158421Swollman# Morton County, ND, switched from mountain to central time on 339158421Swollman# 2003-10-26, except for the area around Mandan which was already central time. 340158421Swollman# See <http://dmses.dot.gov/docimages/p63/135818.pdf>. 341158421Swollman# Officially this switch also included part of Sioux County, and 342158421Swollman# Jones, Mellette, and Todd Counties in South Dakota; 343158421Swollman# but in practice these other counties were already observing central time. 344158421Swollman# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. 345158421SwollmanZone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 346158421Swollman -7:00 US M%sT 2003 Oct 26 02:00 347158421Swollman -6:00 US C%sT 3482742Swollman 34986222Swollman# US mountain time, represented by Denver 35067578Swollman# 351136638Swollman# Colorado, far western Kansas, Montana, western 35286222Swollman# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 353171948Sedwin# New Mexico, southwestern North Dakota, 35475267Swollman# western South Dakota, far western Texas (El Paso County, Hudspeth County, 35575267Swollman# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 35667578Swollman# 35714343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 35814343SwollmanRule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 35914343SwollmanRule Denver 1920 only - Oct lastSun 2:00 0 S 36014343SwollmanRule Denver 1921 only - May 22 2:00 0 S 36114343SwollmanRule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 36214343SwollmanRule Denver 1965 1966 - Oct lastSun 2:00 0 S 3632742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 364149514SwollmanZone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 36515309Swollman -7:00 US M%sT 1920 36615309Swollman -7:00 Denver M%sT 1942 36715309Swollman -7:00 US M%sT 1946 36815309Swollman -7:00 Denver M%sT 1967 36915309Swollman -7:00 US M%sT 3702742Swollman 37114343Swollman# US Pacific time, represented by Los Angeles 37267578Swollman# 373136638Swollman# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 374171948Sedwin# Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, 375171948Sedwin# and the northern three-quarters of Idaho county), 376136638Swollman# most of Nevada, most of Oregon, and Washington 37767578Swollman# 37814343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 37914343SwollmanRule CA 1948 only - Mar 14 2:00 1:00 D 38014343SwollmanRule CA 1949 only - Jan 1 2:00 0 S 38114343SwollmanRule CA 1950 1966 - Apr lastSun 2:00 1:00 D 38214343SwollmanRule CA 1950 1961 - Sep lastSun 2:00 0 S 38314343SwollmanRule CA 1962 1966 - Oct lastSun 2:00 0 S 38414343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 385149514SwollmanZone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 38614343Swollman -8:00 US P%sT 1946 38714343Swollman -8:00 CA P%sT 1967 38814343Swollman -8:00 US P%sT 3898029Swollman 39014343Swollman# Alaska 39114343Swollman# AK%sT is the modern abbreviation for -9:00 per USNO. 39214343Swollman# 39386222Swollman# From Paul Eggert (2001-05-30): 39414343Swollman# Howse writes that Alaska switched from the Julian to the Gregorian calendar, 39519878Swollman# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 39675267Swollman# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 39775267Swollman# also a Friday. Include only the time zone part of this transition, 39875267Swollman# ignoring the switch from Julian to Gregorian, since we can't represent 39975267Swollman# the Julian calendar. 40014343Swollman# 40186222Swollman# As far as we know, none of the exact locations mentioned below were 40286222Swollman# permanently inhabited in 1867 by anyone using either calendar. 40386222Swollman# (Yakutat was colonized by the Russians in 1799, but the settlement 40486222Swollman# was destroyed in 1805 by a Yakutat-kon war party.) However, there 40586222Swollman# were nearby inhabitants in some cases and for our purposes perhaps 40686222Swollman# it's best to simply use the official transition. 40786222Swollman# 40814343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 40975267SwollmanZone America/Juneau 15:02:19 - LMT 1867 Oct 18 41075267Swollman -8:57:41 - LMT 1900 Aug 20 12:00 41114343Swollman -8:00 - PST 1942 41214343Swollman -8:00 US P%sT 1946 41314343Swollman -8:00 - PST 1969 41414343Swollman -8:00 US P%sT 1983 Oct 30 2:00 415136638Swollman -9:00 US Y%sT 1983 Nov 30 41614343Swollman -9:00 US AK%sT 41775267SwollmanZone America/Yakutat 14:41:05 - LMT 1867 Oct 18 41875267Swollman -9:18:55 - LMT 1900 Aug 20 12:00 41914343Swollman -9:00 - YST 1942 42014343Swollman -9:00 US Y%sT 1946 42114343Swollman -9:00 - YST 1969 422136638Swollman -9:00 US Y%sT 1983 Nov 30 42314343Swollman -9:00 US AK%sT 42475267SwollmanZone America/Anchorage 14:00:24 - LMT 1867 Oct 18 42575267Swollman -9:59:36 - LMT 1900 Aug 20 12:00 42614343Swollman -10:00 - CAT 1942 427158421Swollman -10:00 US CAT/CAWT 1945 Aug 14 23:00u 428158421Swollman -10:00 US CAT/CAPT 1946 # Peace 42914343Swollman -10:00 - CAT 1967 Apr 43014343Swollman -10:00 - AHST 1969 43114343Swollman -10:00 US AH%sT 1983 Oct 30 2:00 432136638Swollman -9:00 US Y%sT 1983 Nov 30 43314343Swollman -9:00 US AK%sT 43475267SwollmanZone America/Nome 12:58:21 - LMT 1867 Oct 18 43575267Swollman -11:01:38 - LMT 1900 Aug 20 12:00 43614343Swollman -11:00 - NST 1942 43714343Swollman -11:00 US N%sT 1946 43814343Swollman -11:00 - NST 1967 Apr 43914343Swollman -11:00 - BST 1969 44014343Swollman -11:00 US B%sT 1983 Oct 30 2:00 441136638Swollman -9:00 US Y%sT 1983 Nov 30 44214343Swollman -9:00 US AK%sT 44375267SwollmanZone America/Adak 12:13:21 - LMT 1867 Oct 18 44475267Swollman -11:46:38 - LMT 1900 Aug 20 12:00 44514343Swollman -11:00 - NST 1942 44614343Swollman -11:00 US N%sT 1946 44714343Swollman -11:00 - NST 1967 Apr 44814343Swollman -11:00 - BST 1969 44914343Swollman -11:00 US B%sT 1983 Oct 30 2:00 450136638Swollman -10:00 US AH%sT 1983 Nov 30 45114343Swollman -10:00 US HA%sT 452149514Swollman# The following switches don't quite make our 1970 cutoff. 453149514Swollman# 45414343Swollman# Shanks writes that part of southwest Alaska (e.g. Aniak) 45514343Swollman# switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 45614343Swollman# and another part (e.g. Akiak) made the same switch five weeks later. 457149514Swollman# 458149514Swollman# From David Flater (2004-11-09): 459149514Swollman# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 460149514Swollman# Historic Preservation Commission, provided this information, which 461149514Swollman# suggests that Unalaska deviated from statutory time from early 1967 462149514Swollman# possibly until 1983: 463149514Swollman# 464149514Swollman# Minutes of the Unalaska City Council Meeting, January 10, 1967: 465149514Swollman# "Except for St. Paul and Akutan, Unalaska is the only important 466149514Swollman# location not on Alaska Standard Time. The following resolution was 467149514Swollman# made by William Robinson and seconded by Henry Swanson: Be it 468149514Swollman# resolved that the City of Unalaska hereby goes to Alaska Standard 469149514Swollman# Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 470149514Swollman# January 14, Alaska Standard Time.) This resolution was passed with 471149514Swollman# three votes for and one against." 4722742Swollman 47314343Swollman# Hawaii 474218122Sedwin 475218122Sedwin# From Arthur David Olson (2010-12-09): 476218122Sedwin# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 477218122Sedwin# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, 478218122Sedwin# the article is available at 479218122Sedwin# <a href="http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf"> 480218122Sedwin# http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf 481218122Sedwin# </a> 482218122Sedwin# and indicates that standard time was adopted effective noon, January 483218122Sedwin# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight 484218122Sedwin# saving for the period between the last Sunday of each April and the 485218122Sedwin# last Sunday of each September, but less than a month later repealed the 486218122Sedwin# act," (page 220), that year-round daylight saving time was in effect 487218122Sedwin# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for 488218122Sedwin# when clocks changed) and that clocks were changed by 30 minutes 489218122Sedwin# effective the second Sunday of June, 1947 (page 219, with no time of 490218122Sedwin# day given for when clocks changed). A footnote for the 1933 changes 491218122Sedwin# cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) 492218122Sedwin# and Act 163 (approved 21 May 1933)." 493218122Sedwin 494218122Sedwin# From Arthur David Olson (2011-01-19): 495218122Sedwin# The following is from "Laws of the Territory of Hawaii Passed by the 496218122Sedwin# Seventeenth Legislature: Regular Session 1933," available (as of 497218122Sedwin# 2011-01-19) at American University's Pence Law Library. Page 85: "Act 498218122Sedwin# 90...At 2 o'clock ante meridian of the last Sunday in April of each 499218122Sedwin# year, the standard time of this Territory shall be advanced one 500218122Sedwin# hour...This Act shall take effect upon its approval. Approved this 26th 501218122Sedwin# day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of 502218122Sedwin# Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is 503218122Sedwin# hereby repealed...This Act shall take effect upon its approval, upon 504218122Sedwin# which date the standard time of this Territory shall be restored to 505218122Sedwin# that existing immediately prior to the taking effect of said Act 90. 506218122Sedwin# Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor 507218122Sedwin# of the Territory of Hawaii." 50814343Swollman# 509218122Sedwin# Note that 1933-05-21 was a Sunday. 510218122Sedwin# We're left to guess the time of day when Act 163 was approved; guess noon. 511218122Sedwin 512218122SedwinZone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 #Schmitt&Cox 513218122Sedwin -10:30 - HST 1933 Apr 30 2:00 #Laws 1933 514218122Sedwin -10:30 1:00 HDT 1933 May 21 12:00 #Laws 1933+12 515218122Sedwin -10:30 - HST 1942 Feb 09 2:00 #Schmitt&Cox+2 516218122Sedwin -10:30 1:00 HDT 1945 Sep 30 2:00 #Schmitt&Fox+2 517218122Sedwin -10:30 US H%sT 1947 Jun 8 2:00 #Schmitt&Fox+2 51814343Swollman -10:00 - HST 5192742Swollman 52014343Swollman# Now we turn to US areas that have diverged from the consensus since 1970. 52114343Swollman 52214343Swollman# Arizona mostly uses MST. 523114173Swollman 524114173Swollman# From Paul Eggert (2002-10-20): 525114173Swollman# 526114173Swollman# The information in the rest of this paragraph is derived from the 527114173Swollman# <a href="http://www.dlapr.lib.az.us/links/daylight.htm"> 528114173Swollman# Daylight Saving Time web page (2002-01-23)</a> maintained by the 529114173Swollman# Arizona State Library, Archives and Public Records. 530114173Swollman# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 531114173Swollman# time, but by federal law railroads, airlines, bus lines, military 532114173Swollman# personnel, and some engaged in interstate commerce continued to 533114173Swollman# observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 534114173Swollman# Gazette says that was the date the law changed, and that 04-01 was 535114173Swollman# the date the state's clocks would change. In 1945 the State of 536114173Swollman# Arizona used standard time all year, again with exceptions only as 537114173Swollman# mandated by federal law. Arizona observed DST in 1967, but Arizona 538114173Swollman# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 539114173Swollman# 540114173Swollman# Shanks says the 1944 experiment came to an end on 1944-03-17. 541114173Swollman# Go with the Arizona State Library instead. 542114173Swollman 543149514SwollmanZone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 54414343Swollman -7:00 US M%sT 1944 Jan 1 00:01 545114173Swollman -7:00 - MST 1944 Apr 1 00:01 54614343Swollman -7:00 US M%sT 1944 Oct 1 00:01 54714343Swollman -7:00 - MST 1967 548114173Swollman -7:00 US M%sT 1968 Mar 21 54914343Swollman -7:00 - MST 55019878Swollman# From Arthur David Olson (1988-02-13): 55114343Swollman# A writer from the Inter Tribal Council of Arizona, Inc., 552136638Swollman# notes in private correspondence dated 1987-12-28 that "Presently, only the 5532742Swollman# Navajo Nation participates in the Daylight Saving Time policy, due to its 5542742Swollman# large size and location in three states." (The "only" means that other 5552742Swollman# tribal nations don't use DST.) 5562742Swollman 55714343SwollmanLink America/Denver America/Shiprock 5582742Swollman 559136638Swollman# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 560136638Swollman# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 561136638Swollman# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 562136638Swollman# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 563171948Sedwin# Teton, Twin Falls, Valley, Washington counties, and the southern 564171948Sedwin# quarter of Idaho county) and eastern Oregon (most of Malheur County) 565136638Swollman# switched four weeks late in 1974. 566149514Swollman# 56714343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 568149514SwollmanZone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 56914343Swollman -8:00 US P%sT 1923 May 13 2:00 57014343Swollman -7:00 US M%sT 1974 57114343Swollman -7:00 - MST 1974 Feb 3 2:00 57214343Swollman -7:00 US M%sT 5732742Swollman 57414343Swollman# Indiana 57514343Swollman# 57658787Sru# For a map of Indiana's time zone regions, see: 57758787Sru# <a href="http://www.mccsc.edu/time.html"> 57858787Sru# What time is it in Indiana? 579158421Swollman# </a> (2006-03-01) 58058787Sru# 581171948Sedwin# From Paul Eggert (2007-08-17): 582149590Swollman# Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 583149590Swollman# with the following exceptions: 584149590Swollman# 585149590Swollman# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 586149590Swollman# Vandenburgh, and Warrick counties have been like America/Chicago. 587149590Swollman# 588149590Swollman# - Dearborn and Ohio counties have been like America/New_York. 589149590Swollman# 590149590Swollman# - Clark, Floyd, and Harrison counties have been like 591149590Swollman# America/Kentucky/Louisville. 592149590Swollman# 593171948Sedwin# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, 594171948Sedwin# and Switzerland counties have their own time zone histories as noted below. 595158421Swollman# 596158421Swollman# Shanks partitioned Indiana into 345 regions, each with its own time history, 597158421Swollman# and wrote ``Even newspaper reports present contradictory information.'' 598158421Swollman# Those Hoosiers! Such a flighty and changeable people! 59914343Swollman# Fortunately, most of the complexity occurred before our cutoff date of 1970. 60014343Swollman# 60114343Swollman# Other than Indianapolis, the Indiana place names are so nondescript 60214343Swollman# that they would be ambiguous if we left them at the `America' level. 60314343Swollman# So we reluctantly put them all in a subdirectory `America/Indiana'. 60475267Swollman 605149514Swollman# From Paul Eggert (2005-08-16): 606158421Swollman# http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006. 60775267Swollman 608158421Swollman# From Nathan Stratton Treadway (2006-03-30): 609158421Swollman# http://www.dot.gov/affairs/dot0406.htm [3705 B] 610158421Swollman# From Deborah Goldsmith (2006-01-18): 611158421Swollman# http://dmses.dot.gov/docimages/pdf95/382329_web.pdf [2.9 MB] 612158421Swollman# From Paul Eggert (2006-01-20): 613158421Swollman# It says "DOT is relocating the time zone boundary in Indiana to move Starke, 614158421Swollman# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 615158421Swollman# Eastern Time Zone to the Central Time Zone.... The effective date of 616158421Swollman# this rule is 2:OO a.m. EST Sunday, April 2, 2006, which is the 617158421Swollman# changeover date from standard time to Daylight Saving Time." 618158421Swollman# Strictly speaking, this means the affected counties will change their 619158421Swollman# clocks twice that night, but this obviously is in error. The intent 620158421Swollman# is that 01:59:59 EST be followed by 02:00:00 CDT. 621158421Swollman 622169811Swollman# From Gwillim Law (2007-02-10): 623169811Swollman# The Associated Press has been reporting that Pulaski County, Indiana is 624169811Swollman# going to switch from Central to Eastern Time on March 11, 2007.... 625169811Swollman# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 626169811Swollman 62714343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 62814343SwollmanRule Indianapolis 1941 only - Jun 22 2:00 1:00 D 62914343SwollmanRule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 63014343SwollmanRule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 63114343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 632149514SwollmanZone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 63314343Swollman -6:00 US C%sT 1920 63414343Swollman -6:00 Indianapolis C%sT 1942 63514343Swollman -6:00 US C%sT 1946 63614343Swollman -6:00 Indianapolis C%sT 1955 Apr 24 2:00 63714343Swollman -5:00 - EST 1957 Sep 29 2:00 63814343Swollman -6:00 - CST 1958 Apr 27 2:00 63914343Swollman -5:00 - EST 1969 64014343Swollman -5:00 US E%sT 1971 641149514Swollman -5:00 - EST 2006 642149514Swollman -5:00 US E%sT 6432742Swollman# 644158421Swollman# Eastern Crawford County, Indiana, left its clocks alone in 1974, 645158421Swollman# as well as from 1976 through 2005. 64614343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 64714343SwollmanRule Marengo 1951 only - Apr lastSun 2:00 1:00 D 64814343SwollmanRule Marengo 1951 only - Sep lastSun 2:00 0 S 64914343SwollmanRule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 65014343SwollmanRule Marengo 1954 1960 - Sep lastSun 2:00 0 S 65114343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 652149514SwollmanZone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 65314343Swollman -6:00 US C%sT 1951 65414343Swollman -6:00 Marengo C%sT 1961 Apr 30 2:00 65514343Swollman -5:00 - EST 1969 65614343Swollman -5:00 US E%sT 1974 Jan 6 2:00 65714343Swollman -6:00 1:00 CDT 1974 Oct 27 2:00 65814343Swollman -5:00 US E%sT 1976 659149514Swollman -5:00 - EST 2006 660149514Swollman -5:00 US E%sT 66114343Swollman# 662171948Sedwin# Daviess, Dubois, Knox, and Martin Counties, Indiana, 663171948Sedwin# switched from eastern to central time in April 2006, then switched back 664171948Sedwin# in November 2007. 665158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 666158421SwollmanRule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 667158421SwollmanRule Vincennes 1946 only - Sep lastSun 2:00 0 S 668158421SwollmanRule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 669158421SwollmanRule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 670158421SwollmanRule Vincennes 1955 only - May 1 0:00 1:00 D 671158421SwollmanRule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 672158421SwollmanRule Vincennes 1960 only - Oct lastSun 2:00 0 S 673158421SwollmanRule Vincennes 1961 only - Sep lastSun 2:00 0 S 674158421SwollmanRule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 675158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 676158421SwollmanZone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 677158421Swollman -6:00 US C%sT 1946 678158421Swollman -6:00 Vincennes C%sT 1964 Apr 26 2:00 679158421Swollman -5:00 - EST 1969 680158421Swollman -5:00 US E%sT 1971 681158421Swollman -5:00 - EST 2006 Apr 2 2:00 682171948Sedwin -6:00 US C%sT 2007 Nov 4 2:00 683171948Sedwin -5:00 US E%sT 684171948Sedwin# 685171948Sedwin# Perry County, Indiana, switched from eastern to central time in April 2006. 686171948Sedwin# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 687171948SedwinRule Perry 1946 only - Apr lastSun 2:00 1:00 D 688171948SedwinRule Perry 1946 only - Sep lastSun 2:00 0 S 689171948SedwinRule Perry 1953 1954 - Apr lastSun 2:00 1:00 D 690171948SedwinRule Perry 1953 1959 - Sep lastSun 2:00 0 S 691171948SedwinRule Perry 1955 only - May 1 0:00 1:00 D 692171948SedwinRule Perry 1956 1963 - Apr lastSun 2:00 1:00 D 693171948SedwinRule Perry 1960 only - Oct lastSun 2:00 0 S 694171948SedwinRule Perry 1961 only - Sep lastSun 2:00 0 S 695171948SedwinRule Perry 1962 1963 - Oct lastSun 2:00 0 S 696171948Sedwin# Zone NAME GMTOFF RULES FORMAT [UNTIL] 697171948SedwinZone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 698171948Sedwin -6:00 US C%sT 1946 699171948Sedwin -6:00 Perry C%sT 1964 Apr 26 2:00 700171948Sedwin -5:00 - EST 1969 701171948Sedwin -5:00 US E%sT 1971 702171948Sedwin -5:00 - EST 2006 Apr 2 2:00 703158421Swollman -6:00 US C%sT 704158421Swollman# 705158421Swollman# Pike County, Indiana moved from central to eastern time in 1977, 706171948Sedwin# then switched back in 2006, then switched back again in 2007. 707158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 708158421SwollmanRule Pike 1955 only - May 1 0:00 1:00 D 709158421SwollmanRule Pike 1955 1960 - Sep lastSun 2:00 0 S 710158421SwollmanRule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 711158421SwollmanRule Pike 1961 1964 - Oct lastSun 2:00 0 S 712158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 713158421SwollmanZone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 714158421Swollman -6:00 US C%sT 1955 715158421Swollman -6:00 Pike C%sT 1965 Apr 25 2:00 716158421Swollman -5:00 - EST 1966 Oct 30 2:00 717158421Swollman -6:00 US C%sT 1977 Oct 30 2:00 718158421Swollman -5:00 - EST 2006 Apr 2 2:00 719171948Sedwin -6:00 US C%sT 2007 Nov 4 2:00 720171948Sedwin -5:00 US E%sT 721158421Swollman# 722158421Swollman# Starke County, Indiana moved from central to eastern time in 1991, 723158421Swollman# then switched back in 2006. 72419878Swollman# From Arthur David Olson (1991-10-28): 72519878Swollman# An article on page A3 of the Sunday, 1991-10-27 Washington Post 72614343Swollman# notes that Starke County switched from Central time to Eastern time as of 72719878Swollman# 1991-10-27. 72814343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 72914343SwollmanRule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 73014343SwollmanRule Starke 1947 1954 - Sep lastSun 2:00 0 S 73114343SwollmanRule Starke 1955 1956 - Oct lastSun 2:00 0 S 73214343SwollmanRule Starke 1957 1958 - Sep lastSun 2:00 0 S 73314343SwollmanRule Starke 1959 1961 - Oct lastSun 2:00 0 S 73414343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 735149514SwollmanZone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 73614343Swollman -6:00 US C%sT 1947 73714343Swollman -6:00 Starke C%sT 1962 Apr 29 2:00 73814343Swollman -5:00 - EST 1963 Oct 27 2:00 73914343Swollman -6:00 US C%sT 1991 Oct 27 2:00 740158421Swollman -5:00 - EST 2006 Apr 2 2:00 741158421Swollman -6:00 US C%sT 74214343Swollman# 743169811Swollman# Pulaski County, Indiana, switched from eastern to central time in 744169811Swollman# April 2006 and then switched back in March 2007. 745169811Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 746169811SwollmanRule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 747169811SwollmanRule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 748169811SwollmanRule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 749169811SwollmanRule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 750169811Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 751169811SwollmanZone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 752169811Swollman -6:00 US C%sT 1946 753169811Swollman -6:00 Pulaski C%sT 1961 Apr 30 2:00 754169811Swollman -5:00 - EST 1969 755169811Swollman -5:00 US E%sT 1971 756169811Swollman -5:00 - EST 2006 Apr 2 2:00 757169811Swollman -6:00 US C%sT 2007 Mar 11 2:00 758169811Swollman -5:00 US E%sT 759169811Swollman# 760158421Swollman# Switzerland County, Indiana, did not observe DST from 1973 through 2005. 76114343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 762149514SwollmanZone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 76314343Swollman -6:00 US C%sT 1954 Apr 25 2:00 76414343Swollman -5:00 - EST 1969 76514343Swollman -5:00 US E%sT 1973 766149514Swollman -5:00 - EST 2006 767149514Swollman -5:00 US E%sT 7682742Swollman 76914343Swollman# Part of Kentucky left its clocks alone in 1974. 770149590Swollman# This also includes Clark, Floyd, and Harrison counties in Indiana. 77114343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 77214343SwollmanRule Louisville 1921 only - May 1 2:00 1:00 D 77314343SwollmanRule Louisville 1921 only - Sep 1 2:00 0 S 77414343SwollmanRule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 77514343SwollmanRule Louisville 1941 only - Sep lastSun 2:00 0 S 77614343SwollmanRule Louisville 1946 only - Jun 2 2:00 0 S 77714343SwollmanRule Louisville 1950 1955 - Sep lastSun 2:00 0 S 77814343SwollmanRule Louisville 1956 1960 - Oct lastSun 2:00 0 S 77914343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 780149514SwollmanZone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 78114343Swollman -6:00 US C%sT 1921 78214343Swollman -6:00 Louisville C%sT 1942 78314343Swollman -6:00 US C%sT 1946 78414343Swollman -6:00 Louisville C%sT 1961 Jul 23 2:00 78514343Swollman -5:00 - EST 1968 78614343Swollman -5:00 US E%sT 1974 Jan 6 2:00 78714343Swollman -6:00 1:00 CDT 1974 Oct 27 2:00 78814343Swollman -5:00 US E%sT 78967578Swollman# 790158421Swollman# Wayne County, Kentucky 79158787Sru# 79258787Sru# From 79358787Sru# <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml"> 79458787Sru# Lake Cumberland LIFE 79558787Sru# </a> (1999-01-29) via WKYM-101.7: 79658787Sru# Clinton County has joined Wayne County in asking the DoT to change from 79758787Sru# the Central to the Eastern time zone.... The Wayne County government made 79858787Sru# the same request in December. And while Russell County officials have not 79958787Sru# taken action, the majority of respondents to a poll conducted there in 80058787Sru# August indicated they would like to change to "fast time" also. 80158787Sru# The three Lake Cumberland counties are the farthest east of any U.S. 80258787Sru# location in the Central time zone. 80367578Swollman# 80467578Swollman# From Rich Wales (2000-08-29): 80567578Swollman# After prolonged debate, and despite continuing deep differences of opinion, 80667578Swollman# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 80775267Swollman# (-0500) time. They won't "fall back" this year. See Sara Shipley, 80875267Swollman# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 80986222Swollman# 81086222Swollman# From Paul Eggert (2001-07-16): 81186222Swollman# The final rule was published in the 81286222Swollman# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22"> 81386222Swollman# Federal Register 65, 160 (2000-08-17), page 50154-50158. 81486222Swollman# </a> 815114173Swollman# 816149514SwollmanZone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 81767578Swollman -6:00 US C%sT 1946 81867578Swollman -6:00 - CST 1968 81967578Swollman -6:00 US C%sT 2000 Oct 29 2:00 82067578Swollman -5:00 US E%sT 8212742Swollman 82267578Swollman 82367578Swollman# From Rives McDow (2000-08-30): 82467578Swollman# Here ... are all the changes in the US since 1985. 82567578Swollman# Kearny County, KS (put all of county on central; 82667578Swollman# previously split between MST and CST) ... 1990-10 82767578Swollman# Starke County, IN (from CST to EST) ... 1991-10 82867578Swollman# Oliver County, ND (from MST to CST) ... 1992-10 82967578Swollman# West Wendover, NV (from PST TO MST) ... 1999-10 83067578Swollman# Wayne County, KY (from CST to EST) ... 2000-10 83167578Swollman# 83286222Swollman# From Paul Eggert (2001-07-17): 83386222Swollman# We don't know where the line used to be within Kearny County, KS, 83486222Swollman# so omit that change for now. 83586222Swollman# See America/Indiana/Knox for the Starke County, IN change. 83686222Swollman# See America/North_Dakota/Center for the Oliver County, ND change. 83786222Swollman# West Wendover, NV officially switched from Pacific to mountain time on 83886222Swollman# 1999-10-31. See the 83986222Swollman# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15"> 84086222Swollman# Federal Register 64, 203 (1999-10-21), page 56705-56707. 84186222Swollman# </a> 84286222Swollman# However, the Federal Register says that West Wendover already operated 84386222Swollman# on mountain time, and the rule merely made this official; 84486222Swollman# hence a separate tz entry is not needed. 84567578Swollman 84614343Swollman# Michigan 84714343Swollman# 84819878Swollman# From Bob Devine (1988-01-28): 84914343Swollman# Michigan didn't observe DST from 1968 to 1973. 85014343Swollman# 85158787Sru# From Paul Eggert (1999-03-31): 85258787Sru# Shanks writes that Michigan started using standard time on 1885-09-18, 85358787Sru# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 85458787Sru# that Detroit kept 85514343Swollman# 85614343Swollman# local time until 1900 when the City Council decreed that clocks should 85714343Swollman# be put back twenty-eight minutes to Central Standard Time. Half the 85814343Swollman# city obeyed, half refused. After considerable debate, the decision 85914343Swollman# was rescinded and the city reverted to Sun time. A derisive offer to 86014343Swollman# erect a sundial in front of the city hall was referred to the 86114343Swollman# Committee on Sewers. Then, in 1905, Central time was adopted 86214343Swollman# by city vote. 86314343Swollman# 86414343Swollman# This story is too entertaining to be false, so go with Howse over Shanks. 86514343Swollman# 86675267Swollman# From Paul Eggert (2001-03-06): 86775267Swollman# Garland (1927) writes ``Cleveland and Detroit advanced their clocks 86875267Swollman# one hour in 1914.'' This change is not in Shanks. We have no more 86975267Swollman# info, so omit this for now. 87075267Swollman# 87114343Swollman# Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 87214343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 87314343SwollmanRule Detroit 1948 only - Apr lastSun 2:00 1:00 D 87414343SwollmanRule Detroit 1948 only - Sep lastSun 2:00 0 S 87514343SwollmanRule Detroit 1967 only - Jun 14 2:00 1:00 D 87614343SwollmanRule Detroit 1967 only - Oct lastSun 2:00 0 S 87714343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 87814343SwollmanZone America/Detroit -5:32:11 - LMT 1905 87914343Swollman -6:00 - CST 1915 May 15 2:00 88014343Swollman -5:00 - EST 1942 88114343Swollman -5:00 US E%sT 1946 88214343Swollman -5:00 Detroit E%sT 1973 88314343Swollman -5:00 US E%sT 1975 88414343Swollman -5:00 - EST 1975 Apr 27 2:00 88514343Swollman -5:00 US E%sT 88614343Swollman# 887158421Swollman# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 888158421Swollman# switched from EST to CST/CDT in 1973. 88914343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 89014343SwollmanRule Menominee 1946 only - Apr lastSun 2:00 1:00 D 89114343SwollmanRule Menominee 1946 only - Sep lastSun 2:00 0 S 89214343SwollmanRule Menominee 1966 only - Apr lastSun 2:00 1:00 D 89314343SwollmanRule Menominee 1966 only - Oct lastSun 2:00 0 S 89414343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 89514343SwollmanZone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 89614343Swollman -6:00 US C%sT 1946 89714343Swollman -6:00 Menominee C%sT 1969 Apr 27 2:00 89814343Swollman -5:00 - EST 1973 Apr 29 2:00 89914343Swollman -6:00 US C%sT 90014343Swollman 9012742Swollman# Navassa 90286222Swollman# administered by the US Fish and Wildlife Service 90343543Swollman# claimed by US under the provisions of the 1856 Guano Islands Act 90443543Swollman# also claimed by Haiti 90543543Swollman# occupied 1857/1900 by the Navassa Phosphate Co 90686222Swollman# US lighthouse 1917/1996-09 90743543Swollman# currently uninhabited 90843543Swollman# see Mark Fineman, ``An Isle Rich in Guano and Discord'', 90943543Swollman# _Los Angeles Times_ (1998-11-10), A1, A10; it cites 91043543Swollman# Jimmy Skaggs, _The Great Guano Rush_ (1994). 91114343Swollman 9122742Swollman################################################################################ 9132742Swollman 9142742Swollman 915158421Swollman# From Paul Eggert (2006-03-22): 916158421Swollman# A good source for time zone historical data outside the U.S. is 917158421Swollman# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 918158421Swollman# San Diego: ACS Publications, Inc. (2003). 9192742Swollman# 92086222Swollman# Gwillim Law writes that a good source 92120094Swollman# for recent time zone data is the International Air Transport 92220094Swollman# Association's Standard Schedules Information Manual (IATA SSIM), 92320094Swollman# published semiannually. Law sent in several helpful summaries 92420094Swollman# of the IATA's data after 1990. 92520094Swollman# 926158421Swollman# Except where otherwise noted, Shanks & Pottenger is the source for 927158421Swollman# entries through 1990, and IATA SSIM is the source for entries afterwards. 92820094Swollman# 929121098Swollman# Other sources occasionally used include: 9302742Swollman# 931121098Swollman# Edward W. Whitman, World Time Differences, 932121098Swollman# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 933121098Swollman# which I found in the UCLA library. 934121098Swollman# 935121098Swollman# <a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf"> 936121098Swollman# William Willett, The Waste of Daylight, 19th edition 937121098Swollman# </a> (1914-03) 938121098Swollman# 9399908Swollman# See the `europe' file for Greenland. 9402742Swollman 9412742Swollman# Canada 9422742Swollman 943149514Swollman# From Alain LaBont<e'> (1994-11-14): 9449908Swollman# I post here the time zone abbreviations standardized in Canada 9459908Swollman# for both English and French in the CAN/CSA-Z234.4-89 standard.... 9469908Swollman# 9479908Swollman# UTC Standard time Daylight savings time 9489908Swollman# offset French English French English 9499908Swollman# -2:30 - - HAT NDT 9509908Swollman# -3 - - HAA ADT 9519908Swollman# -3:30 HNT NST - - 9529908Swollman# -4 HNA AST HAE EDT 9539908Swollman# -5 HNE EST HAC CDT 9549908Swollman# -6 HNC CST HAR MDT 9559908Swollman# -7 HNR MST HAP PDT 9569908Swollman# -8 HNP PST HAY YDT 9579908Swollman# -9 HNY YST - - 9589908Swollman# 9599908Swollman# HN: Heure Normale ST: Standard Time 9609908Swollman# HA: Heure Avanc<e'>e DT: Daylight saving Time 9619908Swollman# 9629908Swollman# A: de l'Atlantique Atlantic 9639908Swollman# C: du Centre Central 9649908Swollman# E: de l'Est Eastern 9659908Swollman# M: Mountain 9669908Swollman# N: Newfoundland 9679908Swollman# P: du Pacifique Pacific 9689908Swollman# R: des Rocheuses 9699908Swollman# T: de Terre-Neuve 9709908Swollman# Y: du Yukon Yukon 9719908Swollman# 972149514Swollman# From Paul Eggert (1994-11-22): 9739908Swollman# Alas, this sort of thing must be handled by localization software. 9742742Swollman 975158421Swollman# Unless otherwise specified, the data for Canada are all from Shanks 976158421Swollman# & Pottenger. 9779908Swollman 978169811Swollman# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 979169811Swollman# 2007-03-01): 980158421Swollman# The British Columbia government announced yesterday that it will 981158421Swollman# adjust daylight savings next year to align with changes in the 982158421Swollman# U.S. and the rest of Canada.... 983158421Swollman# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm 984169811Swollman# ... 985169811Swollman# Nova Scotia 986163302Sru# Daylight saving time will be extended by four weeks starting in 2007.... 987169811Swollman# http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf 988169811Swollman# 989163302Sru# [For New Brunswick] the new legislation dictates that the time change is to 990163302Sru# be done at 02:00 instead of 00:01. 991163302Sru# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 992163302Sru# ... 993163302Sru# Manitoba has traditionally changed the clock every fall at 03:00. 994163302Sru# As of 2006, the transition is to take place one hour earlier at 02:00. 995163302Sru# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 996163302Sru# ... 997163302Sru# [Alberta, Ontario, Quebec] will follow US rules. 998169811Swollman# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 999163302Sru# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 1000169811Swollman# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 1001163302Sru# ... 1002169811Swollman# P.E.I. will follow US rules.... 1003169811Swollman# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 1004163302Sru# ... 1005169811Swollman# Province of Newfoundland and Labrador.... 1006169811Swollman# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 1007163302Sru# ... 1008169811Swollman# Yukon 1009169811Swollman# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 1010169811Swollman# ... 1011163302Sru# N.W.T. will follow US rules. Whoever maintains the government web site 1012163302Sru# does not seem to believe in bookmarks. To see the news release, click the 1013163302Sru# following link and search for "Daylight Savings Time Change". Press the 1014163302Sru# "Daylight Savings Time Change" link; it will fire off a popup using 1015163302Sru# JavaScript. 1016163302Sru# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 1017169811Swollman# ... 1018169811Swollman# Nunavut 1019169811Swollman# An amendment to the Interpretation Act was registered on February 19/2007.... 1020169811Swollman# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 1021163302Sru 1022158421Swollman# From Paul Eggert (2006-04-25): 102367578Swollman# H. David Matthews and Mary Vincent's map 1024153761Swollman# <a href="http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp"> 102567578Swollman# "It's about TIME", _Canadian Geographic_ (September-October 1998) 102667578Swollman# </a> contains detailed boundaries for regions observing nonstandard 102767578Swollman# time and daylight saving time arrangements in Canada circa 1998. 102867578Swollman# 1029153761Swollman# INMS, the Institute for National Measurement Standards in Ottawa, has <a 1030153761Swollman# href="http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php"> 103167578Swollman# information about standard and daylight saving time zones in Canada. 103267578Swollman# </a> (updated periodically). 103367578Swollman# Its unofficial information is often taken from Matthews and Vincent. 10349908Swollman 1035163302Sru# From Paul Eggert (2006-06-27): 1036163302Sru# For now, assume all of DST-observing Canada will fall into line with the 1037163302Sru# new US DST rules, 1038163302Sru 10392742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 104017200SwollmanRule Canada 1918 only - Apr 14 2:00 1:00 D 104117200SwollmanRule Canada 1918 only - Oct 31 2:00 0 S 1042121098SwollmanRule Canada 1942 only - Feb 9 2:00 1:00 W # War 1043121098SwollmanRule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 104417200SwollmanRule Canada 1945 only - Sep 30 2:00 0 S 104517200SwollmanRule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 1046153761SwollmanRule Canada 1974 2006 - Oct lastSun 2:00 0 S 1047153761SwollmanRule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 1048153761SwollmanRule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 1049153761SwollmanRule Canada 2007 max - Nov Sun>=1 2:00 0 S 105017200Swollman 105117200Swollman 1052163302Sru# Newfoundland and Labrador 105317200Swollman 105467578Swollman# From Paul Eggert (2000-10-02): 105567578Swollman# Matthews and Vincent (1998) write that Labrador should use NST/NDT, 105667578Swollman# but the only part of Labrador that follows the rules is the 105767578Swollman# southeast corner, including Port Hope Simpson and Mary's Harbour, 105867578Swollman# but excluding, say, Black Tickle. 105967578Swollman 106017200Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1061121098SwollmanRule StJohns 1917 only - Apr 8 2:00 1:00 D 10622742SwollmanRule StJohns 1917 only - Sep 17 2:00 0 S 1063158421Swollman# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 10642742SwollmanRule StJohns 1919 only - May 5 23:00 1:00 D 10652742SwollmanRule StJohns 1919 only - Aug 12 23:00 0 S 1066158421Swollman# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 10672742SwollmanRule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 10682742SwollmanRule StJohns 1920 1935 - Oct lastSun 23:00 0 S 1069158421Swollman# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 1070158421Swollman# Pottenger. 1071121098SwollmanRule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 1072121098SwollmanRule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 1073121098Swollman# Whitman gives the following transitions: 1074121098Swollman# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 1075158421Swollman# but go with Shanks & Pottenger and assume they used Canadian rules. 10762742Swollman# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 1077158421Swollman# Apr 30 - Sep 24; go with Shanks & Pottenger. 10782742SwollmanRule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 10792742SwollmanRule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 10802742SwollmanRule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 10812742SwollmanRule StJohns 1951 1959 - Sep lastSun 2:00 0 S 108267578SwollmanRule StJohns 1960 1986 - Oct lastSun 2:00 0 S 108367578Swollman# From Paul Eggert (2000-10-02): 108467578Swollman# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 108567578Swollman# at 00:01 local time. For now, assume it started in 1987. 108667578SwollmanRule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 1087158421SwollmanRule StJohns 1987 2006 - Oct lastSun 0:01 0 S 108867578SwollmanRule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 1089158421SwollmanRule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1090158421SwollmanRule StJohns 2007 max - Mar Sun>=8 0:01 1:00 D 1091158421SwollmanRule StJohns 2007 max - Nov Sun>=1 0:01 0 S 1092158421Swollman# 10932742Swollman# St John's has an apostrophe, but Posix file names can't have apostrophes. 10942742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 10952742SwollmanZone America/St_Johns -3:30:52 - LMT 1884 1096121098Swollman -3:30:52 StJohns N%sT 1918 1097121098Swollman -3:30:52 Canada N%sT 1919 109820094Swollman -3:30:52 StJohns N%sT 1935 Mar 30 1099121098Swollman -3:30 StJohns N%sT 1942 May 11 1100121098Swollman -3:30 Canada N%sT 1946 11012742Swollman -3:30 StJohns N%sT 11022742Swollman 110367578Swollman# most of east Labrador 110417200Swollman 110520094Swollman# The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'. 110620094Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 110720094SwollmanZone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 1108121098Swollman -3:30:52 - NST 1918 1109121098Swollman -3:30:52 Canada N%sT 1919 111020094Swollman -3:30:52 - NST 1935 Mar 30 111120094Swollman -3:30 - NST 1936 1112121098Swollman -3:30 StJohns N%sT 1942 May 11 1113121098Swollman -3:30 Canada N%sT 1946 111420094Swollman -3:30 StJohns N%sT 1966 Mar 15 2:00 111520094Swollman -4:00 StJohns A%sT 111620094Swollman 111720094Swollman 1118158421Swollman# west Labrador, Nova Scotia, Prince Edward I 111920094Swollman 1120158421Swollman# From Paul Eggert (2006-03-22): 1121158421Swollman# Shanks & Pottenger write that since 1970 most of this region has been like 1122158421Swollman# Halifax. Many locales did not observe peacetime DST until 1972; 112317200Swollman# Glace Bay, NS is the largest that we know of. 1124158421Swollman# Shanks & Pottenger also write that Liverpool, NS was the only town 1125158421Swollman# in Canada to observe DST in 1971 but not 1970; for now we'll assume 1126158421Swollman# this is a typo. 112717200Swollman 11282742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1129158421SwollmanRule Halifax 1916 only - Apr 1 0:00 1:00 D 1130158421SwollmanRule Halifax 1916 only - Oct 1 0:00 0 S 1131158421SwollmanRule Halifax 1920 only - May 9 0:00 1:00 D 1132158421SwollmanRule Halifax 1920 only - Aug 29 0:00 0 S 1133158421SwollmanRule Halifax 1921 only - May 6 0:00 1:00 D 1134158421SwollmanRule Halifax 1921 1922 - Sep 5 0:00 0 S 1135158421SwollmanRule Halifax 1922 only - Apr 30 0:00 1:00 D 1136158421SwollmanRule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1137158421SwollmanRule Halifax 1923 only - Sep 4 0:00 0 S 1138158421SwollmanRule Halifax 1924 only - Sep 15 0:00 0 S 1139158421SwollmanRule Halifax 1925 only - Sep 28 0:00 0 S 1140158421SwollmanRule Halifax 1926 only - May 16 0:00 1:00 D 1141158421SwollmanRule Halifax 1926 only - Sep 13 0:00 0 S 1142158421SwollmanRule Halifax 1927 only - May 1 0:00 1:00 D 1143158421SwollmanRule Halifax 1927 only - Sep 26 0:00 0 S 1144158421SwollmanRule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1145158421SwollmanRule Halifax 1928 only - Sep 9 0:00 0 S 1146158421SwollmanRule Halifax 1929 only - Sep 3 0:00 0 S 1147158421SwollmanRule Halifax 1930 only - Sep 15 0:00 0 S 1148158421SwollmanRule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1149158421SwollmanRule Halifax 1932 only - May 1 0:00 1:00 D 1150158421SwollmanRule Halifax 1933 only - Apr 30 0:00 1:00 D 1151158421SwollmanRule Halifax 1933 only - Oct 2 0:00 0 S 1152158421SwollmanRule Halifax 1934 only - May 20 0:00 1:00 D 1153158421SwollmanRule Halifax 1934 only - Sep 16 0:00 0 S 1154158421SwollmanRule Halifax 1935 only - Jun 2 0:00 1:00 D 1155158421SwollmanRule Halifax 1935 only - Sep 30 0:00 0 S 1156158421SwollmanRule Halifax 1936 only - Jun 1 0:00 1:00 D 1157158421SwollmanRule Halifax 1936 only - Sep 14 0:00 0 S 1158158421SwollmanRule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1159158421SwollmanRule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1160158421SwollmanRule Halifax 1939 only - May 28 0:00 1:00 D 1161158421SwollmanRule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1162158421SwollmanRule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1163158421SwollmanRule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1164158421SwollmanRule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1165158421SwollmanRule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1166158421SwollmanRule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1167158421SwollmanRule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1168158421SwollmanRule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1169158421SwollmanRule Halifax 1962 1973 - Oct lastSun 2:00 0 S 11702742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 11712742SwollmanZone America/Halifax -4:14:24 - LMT 1902 Jun 15 1172121098Swollman -4:00 Halifax A%sT 1918 1173121098Swollman -4:00 Canada A%sT 1919 1174121098Swollman -4:00 Halifax A%sT 1942 Feb 9 2:00s 1175121098Swollman -4:00 Canada A%sT 1946 1176121098Swollman -4:00 Halifax A%sT 1974 1177121098Swollman -4:00 Canada A%sT 117817200SwollmanZone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 117917200Swollman -4:00 Canada A%sT 1953 118017200Swollman -4:00 Halifax A%sT 1954 118117200Swollman -4:00 - AST 1972 1182121098Swollman -4:00 Halifax A%sT 1974 1183121098Swollman -4:00 Canada A%sT 11842742Swollman 1185158421Swollman# New Brunswick 11868029Swollman 1187169811Swollman# From Paul Eggert (2007-01-31): 1188169811Swollman# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 1189169811Swollman# says they changed at 00:01 through 2006, and 1190158421Swollman# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1191169811Swollman# clear that this was the case since at least 1993. 1192163302Sru# For now, assume it started in 1993. 1193158421Swollman 1194158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1195158421SwollmanRule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1196158421SwollmanRule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1197158421SwollmanRule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1198158421SwollmanRule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1199158421SwollmanRule Moncton 1939 only - May 27 1:00 1:00 D 1200158421SwollmanRule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1201158421SwollmanRule Moncton 1940 only - May 19 1:00 1:00 D 1202158421SwollmanRule Moncton 1941 only - May 4 1:00 1:00 D 1203158421SwollmanRule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1204158421SwollmanRule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1205158421SwollmanRule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1206158421SwollmanRule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1207158421SwollmanRule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1208158421Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1209158421SwollmanZone America/Moncton -4:19:08 - LMT 1883 Dec 9 1210158421Swollman -5:00 - EST 1902 Jun 15 1211158421Swollman -4:00 Canada A%sT 1933 1212158421Swollman -4:00 Moncton A%sT 1942 1213158421Swollman -4:00 Canada A%sT 1946 1214158421Swollman -4:00 Moncton A%sT 1973 1215158421Swollman -4:00 Canada A%sT 1993 1216163302Sru -4:00 Moncton A%sT 2007 1217163302Sru -4:00 Canada A%sT 1218158421Swollman 1219163302Sru# Quebec 122017200Swollman 1221163302Sru# From Paul Eggert (2006-07-09): 1222163302Sru# Shanks & Pottenger write that since 1970 most of Quebec has been 1223163302Sru# like Montreal. 1224163302Sru 1225163302Sru# From Paul Eggert (2006-06-27): 1226163302Sru# Matthews and Vincent (1998) also write that Quebec east of the -63 1227163302Sru# meridian is supposed to observe AST, but residents as far east as 1228163302Sru# Natashquan use EST/EDT, and residents east of Natashquan use AST. 1229163302Sru# In "Official time in Quebec" the Quebec department of justice writes in 1230163302Sru# http://www.justice.gouv.qc.ca/english/publications/generale/temps-regl-1-a.htm 1231163302Sru# that "The residents of the Municipality of the 1232163302Sru# Cote-Nord-du-Golfe-Saint-Laurent and the municipalities of Saint-Augustin, 1233163302Sru# Bonne-Esperance and Blanc-Sablon apply the Official Time Act as it is 1234163302Sru# written and use Atlantic standard time all year round. The same applies to 1235163302Sru# the residents of the Native facilities along the lower North Shore." 1236163302Sru# <http://www.assnat.qc.ca/eng/37legislature2/Projets-loi/Publics/06-a002.htm> 1237163302Sru# says this common practice was codified into law as of 2007. 1238163302Sru# For lack of better info, guess this practice began around 1970, contra to 1239163302Sru# Shanks & Pottenger who have this region observing AST/ADT. 1240163302Sru 1241163302Sru# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1242163302SruRule Mont 1917 only - Mar 25 2:00 1:00 D 1243163302SruRule Mont 1917 only - Apr 24 0:00 0 S 1244163302SruRule Mont 1919 only - Mar 31 2:30 1:00 D 1245163302SruRule Mont 1919 only - Oct 25 2:30 0 S 1246163302SruRule Mont 1920 only - May 2 2:30 1:00 D 1247163302SruRule Mont 1920 1922 - Oct Sun>=1 2:30 0 S 1248163302SruRule Mont 1921 only - May 1 2:00 1:00 D 1249163302SruRule Mont 1922 only - Apr 30 2:00 1:00 D 1250163302SruRule Mont 1924 only - May 17 2:00 1:00 D 1251163302SruRule Mont 1924 1926 - Sep lastSun 2:30 0 S 1252163302SruRule Mont 1925 1926 - May Sun>=1 2:00 1:00 D 1253163302Sru# The 1927-to-1937 rules can be expressed more simply as 1254163302Sru# Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D 1255163302Sru# Rule Mont 1927 1937 - Sep lastSat 24:00 0 S 1256163302Sru# The rules below avoid use of 24:00 1257163302Sru# (which pre-1998 versions of zic cannot handle). 1258163302SruRule Mont 1927 only - May 1 0:00 1:00 D 1259163302SruRule Mont 1927 1932 - Sep lastSun 0:00 0 S 1260163302SruRule Mont 1928 1931 - Apr lastSun 0:00 1:00 D 1261163302SruRule Mont 1932 only - May 1 0:00 1:00 D 1262163302SruRule Mont 1933 1940 - Apr lastSun 0:00 1:00 D 1263163302SruRule Mont 1933 only - Oct 1 0:00 0 S 1264163302SruRule Mont 1934 1939 - Sep lastSun 0:00 0 S 1265163302SruRule Mont 1946 1973 - Apr lastSun 2:00 1:00 D 1266163302SruRule Mont 1945 1948 - Sep lastSun 2:00 0 S 1267163302SruRule Mont 1949 1950 - Oct lastSun 2:00 0 S 1268163302SruRule Mont 1951 1956 - Sep lastSun 2:00 0 S 1269163302SruRule Mont 1957 1973 - Oct lastSun 2:00 0 S 1270163302Sru 1271163302Sru# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1272163302SruZone America/Blanc-Sablon -3:48:28 - LMT 1884 1273163302Sru -4:00 Canada A%sT 1970 1274163302Sru -4:00 - AST 1275163302SruZone America/Montreal -4:54:16 - LMT 1884 1276163302Sru -5:00 Mont E%sT 1918 1277163302Sru -5:00 Canada E%sT 1919 1278163302Sru -5:00 Mont E%sT 1942 Feb 9 2:00s 1279163302Sru -5:00 Canada E%sT 1946 1280163302Sru -5:00 Mont E%sT 1974 1281163302Sru -5:00 Canada E%sT 1282163302Sru 1283163302Sru 1284163302Sru# Ontario 1285163302Sru 1286163302Sru# From Paul Eggert (2006-07-09): 1287163302Sru# Shanks & Pottenger write that since 1970 most of Ontario has been like 1288163302Sru# Toronto. 128917200Swollman# Thunder Bay skipped DST in 1973. 129017200Swollman# Many smaller locales did not observe peacetime DST until 1974; 129117200Swollman# Nipigon (EST) and Rainy River (CST) are the largest that we know of. 129217200Swollman# Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 129317200Swollman 1294121098Swollman# From Mark Brader (2003-07-26): 1295121098Swollman# [According to the Toronto Star] Orillia, Ontario, adopted DST 1296121098Swollman# effective Saturday, 1912-06-22, 22:00; the article mentions that 1297121098Swollman# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1298121098Swollman# have already done so. In Orillia DST was to run until Saturday, 1299121098Swollman# 1912-08-31 (no time mentioned), but it was met with considerable 1300121098Swollman# hostility from certain segments of the public, and was revoked after 1301121098Swollman# only two weeks -- I copied it as Saturday, 1912-07-07, 22:00, but 1302121098Swollman# presumably that should be -07-06. (1912-06-19, -07-12; also letters 1303121098Swollman# earlier in June). 1304121098Swollman# 1305121098Swollman# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1306121098Swollman 130743014Swollman# From Paul Eggert (1997-10-17): 1308121098Swollman# Mark Brader writes that an article in the 1997-10-14 Toronto Star 130943014Swollman# says that Atikokan, Ontario currently does not observe DST, 131043014Swollman# but will vote on 11-10 whether to use EST/EDT. 131143014Swollman# He also writes that the 131243014Swollman# <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html"> 131343014Swollman# Ontario Time Act (1990, Chapter T.9) 131443014Swollman# </a> 131543014Swollman# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 131643014Swollman# Officially Atikokan is therefore on CST/CDT, and most likely this report 131743014Swollman# concerns a non-official time observed as a matter of local practice. 1318158421Swollman# 131967578Swollman# From Paul Eggert (2000-10-02): 132067578Swollman# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 132167578Swollman# New Osnaburgh observe CST all year, that Big Trout Lake observes 132267578Swollman# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 132367578Swollman# violation of the official Ontario rules. 1324163302Sru# 1325163302Sru# From Paul Eggert (2006-07-09): 1326163302Sru# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the 1327163302Sru# 2005-07-21 Chronicle-Journal, which said: 1328163302Sru# 1329163302Sru# The clocks in Atikokan stay set on standard time year-round. 1330163302Sru# This means they spend about half the time on central time and 1331163302Sru# the other half on eastern time. 1332163302Sru# 1333163302Sru# For the most part, the system works, Mayor Dennis Brown said. 1334163302Sru# 1335163302Sru# "The majority of businesses in Atikokan deal more with Eastern 1336163302Sru# Canada, but there are some that deal with Western Canada," he 1337163302Sru# said. "I don't see any changes happening here." 1338163302Sru# 1339163302Sru# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang 1340163302Sru# [New Osnaburgh] follow the same practice." 134167578Swollman 1342163302Sru# From Garry McKinnon (2006-07-14) via Chris Walton: 1343163302Sru# I chatted with a member of my board who has an outstanding memory 1344163302Sru# and a long history in Atikokan (and in the telecom industry) and he 1345163302Sru# can say for certain that Atikokan has been practicing the current 1346163302Sru# time keeping since 1952, at least. 1347163302Sru 1348163302Sru# From Paul Eggert (2006-07-17): 1349163302Sru# Shanks & Pottenger say that Atikokan has agreed with Rainy River 1350163302Sru# ever since standard time was introduced, but the information from 1351163302Sru# McKinnon sounds more authoritative. For now, assume that Atikokan 1352163302Sru# switched to EST immediately after WWII era daylight saving time 1353163302Sru# ended. This matches the old (less-populous) America/Coral_Harbour 1354163302Sru# entry since our cutoff date of 1970, so we can move 1355163302Sru# America/Coral_Harbour to the 'backward' file. 1356163302Sru 1357210718Sedwin# From Mark Brader (2010-03-06): 1358210718Sedwin# 1359210718Sedwin# Currently the database has: 1360210718Sedwin# 1361210718Sedwin# # Ontario 1362210718Sedwin# 1363210718Sedwin# # From Paul Eggert (2006-07-09): 1364210718Sedwin# # Shanks & Pottenger write that since 1970 most of Ontario has been like 1365210718Sedwin# # Toronto. 1366210718Sedwin# # Thunder Bay skipped DST in 1973. 1367210718Sedwin# # Many smaller locales did not observe peacetime DST until 1974; 1368210718Sedwin# # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1369210718Sedwin# 1370210718Sedwin# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom 1371210718Sedwin# right corner of page 1, it says that Toronto will return to standard 1372210718Sedwin# time at 2 am Sunday morning (which agrees with the database), and that: 1373210718Sedwin# 1374210718Sedwin# The one-hour setback will go into effect throughout most of Ontario, 1375210718Sedwin# except in areas like Windsor which remains on standard time all year. 1376210718Sedwin# 1377210718Sedwin# Windsor is, of course, a lot larger than Nipigon. 1378210718Sedwin# 1379210718Sedwin# I only came across this incidentally. I don't know if Windsor began 1380210718Sedwin# observing DST when Detroit did, or in 1974, or on some other date. 1381210718Sedwin# 1382210718Sedwin# By the way, the article continues by noting that: 1383210718Sedwin# 1384210718Sedwin# Some cities in the United States have pushed the deadline back 1385210718Sedwin# three weeks and will change over from daylight saving in October. 1386210718Sedwin 1387210718Sedwin# From Arthur David Olson (2010-07-17): 1388210718Sedwin# 1389210718Sedwin# "Standard Time and Time Zones in Canada" appeared in 1390210718Sedwin# The Journal of The Royal Astronomical Society of Canada, 1391210718Sedwin# volume 26, number 2 (February 1932) and, as of 2010-07-17, 1392210718Sedwin# was available at 1393210718Sedwin# <a href="http://adsabs.harvard.edu/full/1932JRASC..26...49S"> 1394210718Sedwin# http://adsabs.harvard.edu/full/1932JRASC..26...49S 1395210718Sedwin# </a> 1396210718Sedwin# 1397210718Sedwin# It includes the text below (starting on page 57): 1398210718Sedwin# 1399210718Sedwin# A list of the places in Canada using daylight saving time would 1400210718Sedwin# require yearly revision. From information kindly furnished by 1401210718Sedwin# the provincial governments and by the postmasters in many cities 1402210718Sedwin# and towns, it is found that the following places used daylight sav- 1403210718Sedwin# ing in 1930. The information for the province of Quebec is definite, 1404210718Sedwin# for the other provinces only approximate: 1405210718Sedwin# 1406210718Sedwin# Province Daylight saving time used 1407210718Sedwin# Prince Edward Island Not used. 1408210718Sedwin# Nova Scotia In Halifax only. 1409210718Sedwin# New Brunswick In St. John only. 1410210718Sedwin# Quebec In the following places: 1411210718Sedwin# Montreal Lachine 1412210718Sedwin# Quebec Mont-Royal 1413210718Sedwin# Levis Iberville 1414210718Sedwin# St. Lambert Cap de la Madeleine 1415210718Sedwin# Verdun Loretteville 1416210718Sedwin# Westmount Richmond 1417210718Sedwin# Outremont St. Jerome 1418210718Sedwin# Longueuil Greenfield Park 1419210718Sedwin# Arvida Waterloo 1420210718Sedwin# Chambly-Canton Beaulieu 1421210718Sedwin# Melbourne La Tuque 1422210718Sedwin# St. Theophile Buckingham 1423210718Sedwin# Ontario Used generally in the cities and towns along 1424210718Sedwin# the southerly part of the province. Not 1425210718Sedwin# used in the northwesterlhy part. 1426210718Sedwin# Manitoba Not used. 1427210718Sedwin# Saskatchewan In Regina only. 1428210718Sedwin# Alberta Not used. 1429210718Sedwin# British Columbia Not used. 1430210718Sedwin# 1431210718Sedwin# With some exceptions, the use of daylight saving may be said to be limited 1432210718Sedwin# to those cities and towns lying between Quebec city and Windsor, Ont. 1433210718Sedwin 14342742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1435121098SwollmanRule Toronto 1919 only - Mar 30 23:30 1:00 D 1436121098SwollmanRule Toronto 1919 only - Oct 26 0:00 0 S 1437121098SwollmanRule Toronto 1920 only - May 2 2:00 1:00 D 1438121098SwollmanRule Toronto 1920 only - Sep 26 0:00 0 S 1439121098SwollmanRule Toronto 1921 only - May 15 2:00 1:00 D 1440121098SwollmanRule Toronto 1921 only - Sep 15 2:00 0 S 1441121098SwollmanRule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1442158421Swollman# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1443158421Swollman# was meant. 1444121098SwollmanRule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1445121098SwollmanRule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1446136638Swollman# The 1927-to-1939 rules can be expressed more simply as 1447136638Swollman# Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1448136638Swollman# Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1449136638Swollman# Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1450136638Swollman# Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1451136638Swollman# The rules below avoid use of Sun>=25 1452136638Swollman# (which pre-2004 versions of zic cannot handle). 1453136638SwollmanRule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1454136638SwollmanRule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1455136638SwollmanRule Toronto 1932 only - May 1 2:00 1:00 D 1456136638SwollmanRule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1457136638SwollmanRule Toronto 1933 only - Oct 1 2:00 0 S 1458136638SwollmanRule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1459121098SwollmanRule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1460121098SwollmanRule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1461121098SwollmanRule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1462121098SwollmanRule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1463121098SwollmanRule Toronto 1949 only - Nov lastSun 0:00 0 S 1464121098SwollmanRule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1465121098SwollmanRule Toronto 1950 only - Nov lastSun 2:00 0 S 1466121098SwollmanRule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1467158421Swollman# Shanks & Pottenger say Toronto ended DST a week early in 1971, 1468163302Sru# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 1469163302Sru# is wrong, and that he had confirmed it by checking the 1971-10-30 1470163302Sru# Toronto Star, which said that DST was ending 1971-10-31 as usual. 1471121098SwollmanRule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1472121098Swollman 1473121098Swollman# From Paul Eggert (2003-07-27): 1474121098Swollman# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1475121098Swollman# Port Arthur, Ontario, the principle of the Bill has been in 1476121098Swollman# operation for the past three years, and in the City of Moose Jaw, 1477136638Swollman# Saskatchewan, for one year." 1478121098Swollman 1479136638Swollman# From David Bryan via Tory Tronrud, Director/Curator, 1480136638Swollman# Thunder Bay Museum (2003-11-12): 1481136638Swollman# There is some suggestion, however, that, by-law or not, daylight 1482136638Swollman# savings time was being practiced in Fort William and Port Arthur 1483136638Swollman# before 1909.... [I]n 1910, the line between the Eastern and Central 1484136638Swollman# Time Zones was permanently moved about two hundred miles west to 1485136638Swollman# include the Thunder Bay area.... When Canada adopted daylight 1486136638Swollman# savings time in 1916, Fort William and Port Arthur, having done so 1487136638Swollman# already, did not change their clocks.... During the Second World 1488136638Swollman# War,... [t]he cities agreed to implement DST during the summer 1489136638Swollman# months for the remainder of the war years. 1490136638Swollman 14912742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1492121098SwollmanZone America/Toronto -5:17:32 - LMT 1895 1493121098Swollman -5:00 Canada E%sT 1919 1494121098Swollman -5:00 Toronto E%sT 1942 Feb 9 2:00s 1495121098Swollman -5:00 Canada E%sT 1946 1496121098Swollman -5:00 Toronto E%sT 1974 1497121098Swollman -5:00 Canada E%sT 149817200SwollmanZone America/Thunder_Bay -5:57:00 - LMT 1895 1499136638Swollman -6:00 - CST 1910 1500136638Swollman -5:00 - EST 1942 150117200Swollman -5:00 Canada E%sT 1970 150217200Swollman -5:00 Mont E%sT 1973 150317200Swollman -5:00 - EST 1974 150417200Swollman -5:00 Canada E%sT 150517200SwollmanZone America/Nipigon -5:53:04 - LMT 1895 1506121098Swollman -5:00 Canada E%sT 1940 Sep 29 1507121098Swollman -5:00 1:00 EDT 1942 Feb 9 2:00s 150817200Swollman -5:00 Canada E%sT 1509163302SruZone America/Rainy_River -6:18:16 - LMT 1895 1510121098Swollman -6:00 Canada C%sT 1940 Sep 29 1511121098Swollman -6:00 1:00 CDT 1942 Feb 9 2:00s 151217200Swollman -6:00 Canada C%sT 1513163302SruZone America/Atikokan -6:06:28 - LMT 1895 1514163302Sru -6:00 Canada C%sT 1940 Sep 29 1515163302Sru -6:00 1:00 CDT 1942 Feb 9 2:00s 1516163302Sru -6:00 Canada C%sT 1945 Sep 30 2:00 1517163302Sru -5:00 - EST 15182742Swollman 15198029Swollman 152017200Swollman# Manitoba 152119878Swollman 1522158421Swollman# From Rob Douglas (2006-04-06): 1523158421Swollman# the old Manitoba Time Act - as amended by Bill 2, assented to 1524158421Swollman# March 27, 1987 ... said ... 1525158421Swollman# "between two o'clock Central Standard Time in the morning of 1526158421Swollman# the first Sunday of April of each year and two o'clock Central 1527158421Swollman# Standard Time in the morning of the last Sunday of October next 1528158421Swollman# following, one hour in advance of Central Standard Time."... 1529158421Swollman# I believe that the English legislation [of the old time act] had = 1530158421Swollman# been assented to (March 22, 1967).... 1531158421Swollman# Also, as far as I can tell, there was no order-in-council varying 1532158421Swollman# the time of Daylight Saving Time for 2005 and so the provisions of 1533158421Swollman# the 1987 version would apply - the changeover was at 2:00 Central 1534158421Swollman# Standard Time (i.e. not until 3:00 Central Daylight Time). 1535158421Swollman 1536158421Swollman# From Paul Eggert (2006-04-10): 1537158421Swollman# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1538158421Swollman# starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1539158421Swollman# it was also 02:00s in 1966. 1540158421Swollman 15412742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 15422742SwollmanRule Winn 1916 only - Apr 23 0:00 1:00 D 15432742SwollmanRule Winn 1916 only - Sep 17 0:00 0 S 15442742SwollmanRule Winn 1918 only - Apr 14 2:00 1:00 D 15452742SwollmanRule Winn 1918 only - Oct 31 2:00 0 S 15462742SwollmanRule Winn 1937 only - May 16 2:00 1:00 D 154714343SwollmanRule Winn 1937 only - Sep 26 2:00 0 S 1548121098SwollmanRule Winn 1942 only - Feb 9 2:00 1:00 W # War 1549121098SwollmanRule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 15502742SwollmanRule Winn 1945 only - Sep lastSun 2:00 0 S 15512742SwollmanRule Winn 1946 only - May 12 2:00 1:00 D 15522742SwollmanRule Winn 1946 only - Oct 13 2:00 0 S 15532742SwollmanRule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 155414343SwollmanRule Winn 1947 1949 - Sep lastSun 2:00 0 S 155514343SwollmanRule Winn 1950 only - May 1 2:00 1:00 D 155614343SwollmanRule Winn 1950 only - Sep 30 2:00 0 S 155714343SwollmanRule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 155814343SwollmanRule Winn 1951 1958 - Sep lastSun 2:00 0 S 15592742SwollmanRule Winn 1959 only - Oct lastSun 2:00 0 S 15602742SwollmanRule Winn 1960 only - Sep lastSun 2:00 0 S 15612742SwollmanRule Winn 1963 only - Apr lastSun 2:00 1:00 D 156214343SwollmanRule Winn 1963 only - Sep 22 2:00 0 S 1563158421SwollmanRule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1564158421SwollmanRule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1565158421SwollmanRule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 15662742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 15672742SwollmanZone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1568158421Swollman -6:00 Winn C%sT 2006 1569158421Swollman -6:00 Canada C%sT 15702742Swollman 15718029Swollman 157217200Swollman# Saskatchewan 157317200Swollman 1574121098Swollman# From Mark Brader (2003-07-26): 1575121098Swollman# The first actual adoption of DST in Canada was at the municipal 1576121098Swollman# level. As the [Toronto] Star put it (1912-06-07), "While people 1577121098Swollman# elsewhere have long been talking of legislation to save daylight, 1578121098Swollman# the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1579121098Swollman# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1580121098Swollman# presumably late evening, as below), and would run until "the end of 1581121098Swollman# the summer". The discrepancy between municipal time and railroad 1582121098Swollman# time was noted. 1583121098Swollman 1584121098Swollman# From Paul Eggert (2003-07-27): 1585121098Swollman# Willett (1914-03) notes that DST "has been in operation ... in the 1586121098Swollman# City of Moose Jaw, Saskatchewan, for one year." 1587121098Swollman 1588158421Swollman# From Paul Eggert (2006-03-22): 1589158421Swollman# Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 159017200Swollman# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 159117200Swollman# Other western towns (e.g. Lloydminster) are like Edmonton. 159267578Swollman# Matthews and Vincent (1998) write that Denare Beach and Creighton 159367578Swollman# are like Winnipeg, in violation of Saskatchewan law. 159417200Swollman 1595149514Swollman# From W. Jones (1992-11-06): 159617200Swollman# The. . .below is based on information I got from our law library, the 159717200Swollman# provincial archives, and the provincial Community Services department. 159817200Swollman# A precise history would require digging through newspaper archives, and 159917200Swollman# since you didn't say what you wanted, I didn't bother. 160017200Swollman# 160117200Swollman# Saskatchewan is split by a time zone meridian (105W) and over the years 160217200Swollman# the boundary became pretty ragged as communities near it reevaluated 160317200Swollman# their affiliations in one direction or the other. In 1965 a provincial 160417200Swollman# referendum favoured legislating common time practices. 160517200Swollman# 160617200Swollman# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 160717200Swollman# Saskatchewan 1978) was proclaimed, and established that the eastern 160817200Swollman# part of Saskatchewan would use CST year round, that districts in 160917200Swollman# northwest Saskatchewan would by default follow CST but could opt to 161017200Swollman# follow Mountain Time rules (thus 1 hour difference in the winter and 161117200Swollman# zero in the summer), and that districts in southwest Saskatchewan would 161217200Swollman# by default follow MT but could opt to follow CST. 161317200Swollman# 161417200Swollman# It took a few years for the dust to settle (I know one story of a town 161517200Swollman# on one time zone having its school in another, such that a mom had to 161617200Swollman# serve her family lunch in two shifts), but presently it seems that only 161717200Swollman# a few towns on the border with Alberta (e.g. Lloydminster) follow MT 161817200Swollman# rules any more; all other districts appear to have used CST year round 161917200Swollman# since sometime in the 1960s. 162017200Swollman 1621163302Sru# From Chris Walton (2006-06-26): 1622163302Sru# The Saskatchewan time act which was last updated in 1996 is about 30 pages 1623163302Sru# long and rather painful to read. 1624163302Sru# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 1625163302Sru 16262742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 16272742SwollmanRule Regina 1918 only - Apr 14 2:00 1:00 D 16282742SwollmanRule Regina 1918 only - Oct 31 2:00 0 S 16292742SwollmanRule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 16302742SwollmanRule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 16312742SwollmanRule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 16322742SwollmanRule Regina 1937 only - Oct Sun>=8 0:00 0 S 16332742SwollmanRule Regina 1938 only - Oct Sun>=1 0:00 0 S 16342742SwollmanRule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1635121098SwollmanRule Regina 1942 only - Feb 9 2:00 1:00 W # War 1636121098SwollmanRule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 16372742SwollmanRule Regina 1945 only - Sep lastSun 2:00 0 S 163817200SwollmanRule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 163917200SwollmanRule Regina 1946 only - Oct Sun>=8 2:00 0 S 1640121098SwollmanRule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1641121098SwollmanRule Regina 1947 1957 - Sep lastSun 2:00 0 S 1642121098SwollmanRule Regina 1959 only - Apr lastSun 2:00 1:00 D 164317200SwollmanRule Regina 1959 only - Oct lastSun 2:00 0 S 164417200Swollman# 164517200SwollmanRule Swift 1957 only - Apr lastSun 2:00 1:00 D 164617200SwollmanRule Swift 1957 only - Oct lastSun 2:00 0 S 164717200SwollmanRule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 164817200SwollmanRule Swift 1959 only - Oct lastSun 2:00 0 S 164917200SwollmanRule Swift 1960 1961 - Sep lastSun 2:00 0 S 16502742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 165117200SwollmanZone America/Regina -6:58:36 - LMT 1905 Sep 165217200Swollman -7:00 Regina M%sT 1960 Apr lastSun 2:00 16532742Swollman -6:00 - CST 165417200SwollmanZone America/Swift_Current -7:11:20 - LMT 1905 Sep 165517200Swollman -7:00 Canada M%sT 1946 Apr lastSun 2:00 165617200Swollman -7:00 Regina M%sT 1950 165717200Swollman -7:00 Swift M%sT 1972 Apr lastSun 2:00 165817200Swollman -6:00 - CST 16592742Swollman 16608029Swollman 166117200Swollman# Alberta 166217200Swollman 16632742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 16642742SwollmanRule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 16652742SwollmanRule Edm 1918 only - Oct 31 2:00 0 S 16662742SwollmanRule Edm 1919 only - May 27 2:00 0 S 16672742SwollmanRule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 16682742SwollmanRule Edm 1920 only - Oct lastSun 2:00 0 S 16692742SwollmanRule Edm 1921 1923 - Sep lastSun 2:00 0 S 1670121098SwollmanRule Edm 1942 only - Feb 9 2:00 1:00 W # War 1671121098SwollmanRule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 16722742SwollmanRule Edm 1945 only - Sep lastSun 2:00 0 S 16732742SwollmanRule Edm 1947 only - Apr lastSun 2:00 1:00 D 16742742SwollmanRule Edm 1947 only - Sep lastSun 2:00 0 S 16752742SwollmanRule Edm 1967 only - Apr lastSun 2:00 1:00 D 16762742SwollmanRule Edm 1967 only - Oct lastSun 2:00 0 S 16772742SwollmanRule Edm 1969 only - Apr lastSun 2:00 1:00 D 16782742SwollmanRule Edm 1969 only - Oct lastSun 2:00 0 S 16792742SwollmanRule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1680158421SwollmanRule Edm 1972 2006 - Oct lastSun 2:00 0 S 16812742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16822742SwollmanZone America/Edmonton -7:33:52 - LMT 1906 Sep 1683158421Swollman -7:00 Edm M%sT 1987 1684158421Swollman -7:00 Canada M%sT 16852742Swollman 16868029Swollman 168717200Swollman# British Columbia 168817200Swollman 1689158421Swollman# From Paul Eggert (2006-03-22): 1690158421Swollman# Shanks & Pottenger write that since 1970 most of this region has 1691158421Swollman# been like Vancouver. 169258787Sru# Dawson Creek uses MST. Much of east BC is like Edmonton. 169367578Swollman# Matthews and Vincent (1998) write that Creston is like Dawson Creek. 169417200Swollman 16952742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 16962742SwollmanRule Vanc 1918 only - Apr 14 2:00 1:00 D 16972742SwollmanRule Vanc 1918 only - Oct 31 2:00 0 S 1698121098SwollmanRule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1699121098SwollmanRule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 17002742SwollmanRule Vanc 1945 only - Sep 30 2:00 0 S 17012742SwollmanRule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 17022742SwollmanRule Vanc 1946 only - Oct 13 2:00 0 S 17032742SwollmanRule Vanc 1947 1961 - Sep lastSun 2:00 0 S 1704158421SwollmanRule Vanc 1962 2006 - Oct lastSun 2:00 0 S 17052742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17062742SwollmanZone America/Vancouver -8:12:28 - LMT 1884 1707158421Swollman -8:00 Vanc P%sT 1987 1708158421Swollman -8:00 Canada P%sT 170917200SwollmanZone America/Dawson_Creek -8:00:56 - LMT 1884 171017200Swollman -8:00 Canada P%sT 1947 171117200Swollman -8:00 Vanc P%sT 1972 Aug 30 2:00 171217200Swollman -7:00 - MST 17132742Swollman 17148029Swollman 171558787Sru# Northwest Territories, Nunavut, Yukon 171617200Swollman 1717158421Swollman# From Paul Eggert (2006-03-22): 171817200Swollman# Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 1719149514Swollman# Mathew Englander (1996-10-07) gives the following refs: 172020094Swollman# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 172120094Swollman# c. 7 defines Yukon standard time as UTC-9. This is still valid; 172220094Swollman# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 172320094Swollman# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 172420094Swollman# * O.I.C. 1980/02 established DST. 172520094Swollman# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 1726158421Swollman# Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go 1727158421Swollman# with Englander. 1728163302Sru# From Chris Walton (2006-06-26): 1729163302Sru# Here is a link to the old daylight saving portion of the interpretation 1730163302Sru# act which was last updated in 1987: 1731163302Sru# http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf 173217200Swollman 173358787Sru# From Rives McDow (1999-09-04): 173458787Sru# Nunavut ... moved ... to incorporate the whole territory into one time zone. 173558787Sru# <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html"> 173658787Sru# Nunavut moves to single time zone Oct. 31 173758787Sru# </a> 173858787Sru# 173958787Sru# From Antoine Leca (1999-09-06): 174058787Sru# We then need to create a new timezone for the Kitikmeot region of Nunavut 174158787Sru# to differentiate it from the Yellowknife region. 174258787Sru 174358787Sru# From Paul Eggert (1999-09-20): 174458787Sru# <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html"> 174558787Sru# Basic Facts: The New Territory 174686222Swollman# </a> (1999) reports that Pangnirtung operates on eastern time, 174758787Sru# and that Coral Harbour does not observe DST. We don't know when 174886222Swollman# Pangnirtung switched to eastern time; we'll guess 1995. 174958787Sru 175058787Sru# From Rives McDow (1999-11-08): 175158787Sru# On October 31, when the rest of Nunavut went to Central time, 175258787Sru# Pangnirtung wobbled. Here is the result of their wobble: 175358787Sru# 175458787Sru# The following businesses and organizations in Pangnirtung use Central Time: 175558787Sru# 175658787Sru# First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 175758787Sru# Eastern Arctic National Parks, A & D Specialist 175858787Sru# 175958787Sru# The following businesses and organizations in Pangnirtung use Eastern Time: 176058787Sru# 176158787Sru# Hamlet office, All other businesses, Both schools, Airport operator 176258787Sru# 176358787Sru# This has made for an interesting situation there, which warranted the news. 176458787Sru# No one there that I spoke with seems concerned, or has plans to 176558787Sru# change the local methods of keeping time, as it evidently does not 176658787Sru# really interfere with any activities or make things difficult locally. 176758787Sru# They plan to celebrate New Year's turn-over twice, one hour apart, 176858787Sru# so it appears that the situation will last at least that long. 176958787Sru# The Nunavut Intergovernmental Affairs hopes that they will "come to 177058787Sru# their senses", but the locals evidently don't see any problem with 177158787Sru# the current state of affairs. 177258787Sru 177358787Sru# From Michaela Rodrigue, writing in the 177458787Sru# <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html"> 177558787Sru# Nunatsiaq News (1999-11-19)</a>: 177658787Sru# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 177758787Sru# central - or Nunavut time - for government offices, and eastern time 177858787Sru# for municipal offices and schools.... Igloolik [was similar but then] 177958787Sru# made the switch to central time on Saturday, Nov. 6. 178058787Sru 178167578Swollman# From Paul Eggert (2000-10-02): 178267578Swollman# Matthews and Vincent (1998) say the following, but we lack histories 178367578Swollman# for these potential new Zones. 178475267Swollman# 178567578Swollman# The Canadian Forces station at Alert uses Eastern Time while the 178667578Swollman# handful of residents at the Eureka weather station [in the Central 178767578Swollman# zone] skip daylight savings. Baffin Island, which is crossed by the 178867578Swollman# Central, Eastern and Atlantic Time zones only uses Eastern Time. 178967578Swollman# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 179067578Swollman# Central Time and Southampton Island [in the Central zone] is not 179167578Swollman# required to use daylight savings. 179267578Swollman 179375267Swollman# From 179475267Swollman# <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html"> 179575267Swollman# Nunavut now has two time zones 179675267Swollman# </a> (2000-11-10): 179775267Swollman# The Nunavut government would allow its employees in Kugluktuk and 179875267Swollman# Cambridge Bay to operate on central time year-round, putting them 179975267Swollman# one hour behind the rest of Nunavut for six months during the winter. 180075267Swollman# At the end of October the two communities had rebelled against 180175267Swollman# Nunavut's unified time zone, refusing to shift to eastern time with 180275267Swollman# the rest of the territory for the winter. Cambridge Bay remained on 180375267Swollman# central time, while Kugluktuk, even farther west, reverted to 180475267Swollman# mountain time, which they had used before the advent of Nunavut's 180575267Swollman# unified time zone in 1999. 180675267Swollman# 180775267Swollman# From Rives McDow (2001-01-20), quoting the Nunavut government: 180875267Swollman# The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 180975267Swollman 181075267Swollman# From Paul Eggert (2000-12-04): 181175267Swollman# Let's just keep track of the official times for now. 181275267Swollman 181375267Swollman# From Rives McDow (2001-03-07): 181475267Swollman# The premier of Nunavut has issued a ministerial statement advising 181575267Swollman# that effective 2001-04-01, the territory of Nunavut will revert 181675267Swollman# back to three time zones (mountain, central, and eastern). Of the 181775267Swollman# cities in Nunavut, Coral Harbor is the only one that I know of that 181875267Swollman# has said it will not observe dst, staying on EST year round. I'm 181975267Swollman# checking for more info, and will get back to you if I come up with 182075267Swollman# more. 182175267Swollman# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 182275267Swollman 1823149514Swollman# From Gwillim Law (2005-05-21): 1824149514Swollman# According to maps at 1825149514Swollman# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg 1826149514Swollman# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg 1827149514Swollman# (both dated 2003), and 1828149514Swollman# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 1829149514Swollman# (from a 1998 Canadian Geographic article), the de facto and de jure time 1830149514Swollman# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 1831149514Swollman# round. Using Google, it's easy to find other websites that confirm this. 1832149514Swollman# I wasn't able to find how far back this time regimen goes, but since it 1833149514Swollman# predates the creation of Nunavut, it probably goes back many years.... 1834149514Swollman# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 1835149514Swollman# 1836149514Swollman# From Paul Eggert (2005-07-26): 1837149514Swollman# For lack of better information, assume that Southampton Island observed 1838149514Swollman# daylight saving only during wartime. 1839149514Swollman 1840169811Swollman# From Chris Walton (2007-03-01): 1841169811Swollman# ... the community of Resolute (located on Cornwallis Island in 1842169811Swollman# Nunavut) moved from Central Time to Eastern Time last November. 1843169811Swollman# Basically the community did not change its clocks at the end of 1844169811Swollman# daylight saving.... 1845169811Swollman# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 1846163302Sru 1847169811Swollman# From Chris Walton (2007-03-14): 1848169811Swollman# Today I phoned the "hamlet office" to find out what Resolute was doing with 1849169811Swollman# its clocks. 1850169811Swollman# 1851169811Swollman# The individual that answered the phone confirmed that the clocks did not 1852169811Swollman# move at the end of daylight saving on October 29/2006. He also told me that 1853169811Swollman# the clocks did not move this past weekend (March 11/2007).... 1854169811Swollman 1855187588Sedwin# From Chris Walton (2008-11-13): 1856187588Sedwin# ...the residents of Resolute believe that they are changing "time zones" 1857187588Sedwin# twice a year. In winter months, local time is qualified with "Eastern 1858187588Sedwin# Time" which is really "Eastern Standard Time (UTC-5)". In summer 1859187588Sedwin# months, local time is qualified with "Central Time" which is really 1860187588Sedwin# "Central Daylight Time (UTC-5)"... 1861187588Sedwin 18622742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 186317200SwollmanRule NT_YK 1918 only - Apr 14 2:00 1:00 D 186417200SwollmanRule NT_YK 1918 only - Oct 27 2:00 0 S 186517200SwollmanRule NT_YK 1919 only - May 25 2:00 1:00 D 186617200SwollmanRule NT_YK 1919 only - Nov 1 0:00 0 S 1867121098SwollmanRule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 1868121098SwollmanRule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 186917200SwollmanRule NT_YK 1945 only - Sep 30 2:00 0 S 187017200SwollmanRule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 187117200SwollmanRule NT_YK 1965 only - Oct lastSun 2:00 0 S 187217200SwollmanRule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 1873158421SwollmanRule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 1874158421SwollmanRule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 18752742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1876169811Swollman# aka Panniqtuuq 1877169811SwollmanZone America/Pangnirtung 0 - zzz 1921 # trading post est. 187858787Sru -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 187958787Sru -5:00 Canada E%sT 1999 Oct 31 2:00 188075267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 188175267Swollman -5:00 Canada E%sT 1882169811Swollman# formerly Frobisher Bay 1883169811SwollmanZone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est. 188458787Sru -5:00 NT_YK E%sT 1999 Oct 31 2:00 188575267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 188675267Swollman -5:00 Canada E%sT 1887169811Swollman# aka Qausuittuq 1888187588Sedwin# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1889187588SedwinRule Resolute 2006 max - Nov Sun>=1 2:00 0 ES 1890187588SedwinRule Resolute 2007 max - Mar Sun>=8 2:00 0 CD 1891169811SwollmanZone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded 189275267Swollman -6:00 NT_YK C%sT 2000 Oct 29 2:00 189375267Swollman -5:00 - EST 2001 Apr 1 3:00 1894169811Swollman -6:00 Canada C%sT 2006 Oct 29 2:00 1895187588Sedwin -5:00 Resolute %sT 1896169811Swollman# aka Kangiqiniq 1897169811SwollmanZone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded 1898169811Swollman -6:00 NT_YK C%sT 2000 Oct 29 2:00 1899169811Swollman -5:00 - EST 2001 Apr 1 3:00 190058787Sru -6:00 Canada C%sT 1901169811Swollman# aka Iqaluktuuttiaq 1902169811SwollmanZone America/Cambridge_Bay 0 - zzz 1920 # trading post est.? 190358787Sru -7:00 NT_YK M%sT 1999 Oct 31 2:00 190475267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 190575267Swollman -5:00 - EST 2000 Nov 5 0:00 190675267Swollman -6:00 - CST 2001 Apr 1 3:00 190775267Swollman -7:00 Canada M%sT 1908169811SwollmanZone America/Yellowknife 0 - zzz 1935 # Yellowknife founded? 1909158421Swollman -7:00 NT_YK M%sT 1980 1910158421Swollman -7:00 Canada M%sT 1911169811SwollmanZone America/Inuvik 0 - zzz 1953 # Inuvik founded 191217200Swollman -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 1913158421Swollman -7:00 NT_YK M%sT 1980 1914158421Swollman -7:00 Canada M%sT 19152742SwollmanZone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 191617200Swollman -9:00 NT_YK Y%sT 1966 Jul 1 2:00 1917158421Swollman -8:00 NT_YK P%sT 1980 1918158421Swollman -8:00 Canada P%sT 191917200SwollmanZone America/Dawson -9:17:40 - LMT 1900 Aug 20 192020094Swollman -9:00 NT_YK Y%sT 1973 Oct 28 0:00 1921158421Swollman -8:00 NT_YK P%sT 1980 1922158421Swollman -8:00 Canada P%sT 19232742Swollman 19248029Swollman 19252742Swollman############################################################################### 19262742Swollman 19272742Swollman# Mexico 19282742Swollman 192975267Swollman# From Paul Eggert (2001-03-05): 193075267Swollman# The Investigation and Analysis Service of the 193175267Swollman# Mexican Library of Congress (MLoC) has published a 193275267Swollman# <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/"> 193375267Swollman# history of Mexican local time (in Spanish) 193475267Swollman# </a>. 19352742Swollman# 1936158421Swollman# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 193775267Swollman# (In all cases we go with the MLoC.) 1938158421Swollman# S&P report that Baja was at -8:00 in 1922/1923. 1939158421Swollman# S&P say the 1930 transition in Baja was 1930-11-16. 1940158421Swollman# S&P report no DST during summer 1931. 1941158421Swollman# S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 19422742Swollman 194375267Swollman# From Gwillim Law (2001-02-20): 194475267Swollman# There are some other discrepancies between the Decrees page and the 194575267Swollman# tz database. I think they can best be explained by supposing that 194675267Swollman# the researchers who prepared the Decrees page failed to find some of 194775267Swollman# the relevant documents. 194875267Swollman 1949149514Swollman# From Alan Perry (1996-02-15): 195017200Swollman# A guy from our Mexico subsidiary finally found the Presidential Decree 195117200Swollman# outlining the timezone changes in Mexico. 195258787Sru# 195317200Swollman# ------------- Begin Forwarded Message ------------- 195458787Sru# 195517200Swollman# I finally got my hands on the Official Presidential Decree that sets up the 195617200Swollman# rules for the DST changes. The rules are: 195758787Sru# 195817200Swollman# 1. The country is divided in 3 timezones: 195917200Swollman# - Baja California Norte (the Mexico/BajaNorte TZ) 196017200Swollman# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 196117200Swollman# - The rest of the country (the Mexico/General TZ) 196258787Sru# 196317200Swollman# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 196417200Swollman# at 2:00 AM, the times in each zone are as follows: 196517200Swollman# BajaNorte: GMT+7 196617200Swollman# BajaSur: GMT+6 196717200Swollman# General: GMT+5 196858787Sru# 196917200Swollman# 3. The rest of the year, the times are as follows: 197017200Swollman# BajaNorte: GMT+8 197117200Swollman# BajaSur: GMT+7 197217200Swollman# General: GMT+6 197358787Sru# 197417200Swollman# The Decree was published in Mexico's Official Newspaper on January 4th. 197558787Sru# 197617200Swollman# -------------- End Forwarded Message -------------- 197717200Swollman# From Paul Eggert (1996-06-12): 197843014Swollman# For an English translation of the decree, see 197943014Swollman# <a href="http://mexico-travel.com/extra/timezone_eng.html"> 198043014Swollman# ``Diario Oficial: Time Zone Changeover'' (1996-01-04). 198143014Swollman# </a> 198214343Swollman 198343543Swollman# From Rives McDow (1998-10-08): 198443543Swollman# The State of Quintana Roo has reverted back to central STD and DST times 198543543Swollman# (i.e. UTC -0600 and -0500 as of 1998-08-02). 198643543Swollman 198758787Sru# From Rives McDow (2000-01-10): 198858787Sru# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 198958787Sru# zone 5 hours from the International Date Line, and will not observe daylight 199058787Sru# savings time so as to stay on the same time zone as the southern part of 199158787Sru# Arizona year round. 199258787Sru 199375267Swollman# From Jesper Norgaard, translating 199475267Swollman# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 199575267Swollman# In Oaxaca, the 55.000 teachers from the Section 22 of the National 199675267Swollman# Syndicate of Education Workers, refuse to apply daylight saving each 199775267Swollman# year, so that the more than 10,000 schools work at normal hour the 199875267Swollman# whole year. 199975267Swollman 200075267Swollman# From Gwillim Law (2001-01-19): 200175267Swollman# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 200275267Swollman# (translated):... 200375267Swollman# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 200475267Swollman# that Summer Time will be reduced from seven to five months, starting 200575267Swollman# this year.... 200675267Swollman# <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001> 200775267Swollman# [translated], says "summer time will ... take effect on the first Sunday 200875267Swollman# in May, and end on the last Sunday of September. 200975267Swollman 201075267Swollman# From Arthur David Olson (2001-01-25): 201175267Swollman# The 2001-01-24 traditional Washington Post contained the page one 201275267Swollman# story "Timely Issue Divides Mexicans."... 201375267Swollman# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 201475267Swollman# ... Mexico City Mayor Lopez Obrador "...is threatening to keep 201575267Swollman# Mexico City and its 20 million residents on a different time than 201675267Swollman# the rest of the country..." In particular, Lopez Obrador would abolish 201775267Swollman# observation of Daylight Saving Time. 201875267Swollman 201975267Swollman# <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre"> 202075267Swollman# Official statute published by the Energy Department 202175267Swollman# </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 202275267Swollman# and Sonora with no DST. This was reported by Jesper Norgaard (2001-02-03). 202375267Swollman 202475267Swollman# From Paul Eggert (2001-03-03): 202575267Swollman# 202675267Swollman# <a href="http://www.latimes.com/news/nation/20010303/t000018766.html"> 202775267Swollman# James F. Smith writes in today's LA Times 202875267Swollman# </a> 202975267Swollman# * Sonora will continue to observe standard time. 203075267Swollman# * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that 203175267Swollman# the Federal District will not adopt DST. 203275267Swollman# * 4 of 16 district leaders announced they'll ignore the decree. 203375267Swollman# * The decree does not affect federal-controlled facilities including 203475267Swollman# the airport, banks, hospitals, and schools. 203575267Swollman# 203675267Swollman# For now we'll assume that the Federal District will bow to federal rules. 203775267Swollman 203875267Swollman# From Jesper Norgaard (2001-04-01): 203975267Swollman# I found some references to the Mexican application of daylight 204075267Swollman# saving, which modifies what I had already sent you, stating earlier 204175267Swollman# that a number of northern Mexican states would go on daylight 204275267Swollman# saving. The modification reverts this to only cover Baja California 204375267Swollman# (Norte), while all other states (except Sonora, who has no daylight 204475267Swollman# saving all year) will follow the original decree of president 204575267Swollman# Vicente Fox, starting daylight saving May 6, 2001 and ending 204675267Swollman# September 30, 2001. 204775267Swollman# References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp> 204875267Swollman# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 204975267Swollman 205086222Swollman# From Reuters (2001-09-04): 205186222Swollman# Mexico's Supreme Court on Tuesday declared that daylight savings was 205286222Swollman# unconstitutional in Mexico City, creating the possibility the 205386222Swollman# capital will be in a different time zone from the rest of the nation 205486222Swollman# next year.... The Supreme Court's ruling takes effect at 2:00 205586222Swollman# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 205686222Swollman# standard time. "This is so residents of the Federal District are not 205786222Swollman# subject to unexpected time changes," a statement from the court said. 205886222Swollman 205993799Swollman# From Jesper Norgaard Welen (2002-03-12): 206093799Swollman# ... consulting my local grocery store(!) and my coworkers, they all insisted 206193799Swollman# that a new decision had been made to reinstate US style DST in Mexico.... 206293799Swollman# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 206393799Swollman# confirms this. Sonora as usual is the only state where DST is not applied. 206493799Swollman 2065203019Sedwin# From Steffen Thorsen (2009-12-28): 2066203019Sedwin# 2067203019Sedwin# Steffen Thorsen wrote: 2068203019Sedwin# > Mexico's House of Representatives has approved a proposal for northern 2069203019Sedwin# > Mexico's border cities to share the same daylight saving schedule as 2070203019Sedwin# > the United States. 2071203019Sedwin# Now this has passed both the Congress and the Senate, so starting from 2072203019Sedwin# 2010, some border regions will be the same: 2073203019Sedwin# <a href="http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/"> 2074203019Sedwin# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ 2075203019Sedwin# </a> 2076203019Sedwin# <a href="http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939"> 2077203019Sedwin# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 2078203019Sedwin# </a> 2079203019Sedwin# (Spanish) 2080203019Sedwin# 2081203019Sedwin# Could not find the new law text, but the proposed law text changes are here: 2082203019Sedwin# <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf"> 2083203019Sedwin# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf 2084203019Sedwin# </a> 2085203019Sedwin# (Gaceta Parlamentaria) 2086203019Sedwin# 2087203019Sedwin# There is also a list of the votes here: 2088203019Sedwin# <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html"> 2089203019Sedwin# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html 2090203019Sedwin# </a> 2091203019Sedwin# 2092203019Sedwin# Our page: 2093203019Sedwin# <a href="http://www.timeanddate.com/news/time/north-mexico-dst-change.html"> 2094203019Sedwin# http://www.timeanddate.com/news/time/north-mexico-dst-change.html 2095203019Sedwin# </a> 2096203019Sedwin 2097203019Sedwin# From Arthur David Olson (2010-01-20): 2098203019Sedwin# The page 2099203019Sedwin# <a href="http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010"> 2100203019Sedwin# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2101203019Sedwin# </a> 2102203019Sedwin# includes this text: 2103203019Sedwin# En los municipios fronterizos de Tijuana y Mexicali en Baja California; 2104203019Sedwin# Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila; 2105203019Sedwin# Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en 2106203019Sedwin# Tamaulipas, la aplicación de este horario estacional surtirá efecto 2107203019Sedwin# desde las dos horas del segundo domingo de marzo y concluirá a las dos 2108203019Sedwin# horas del primer domingo de noviembre. 2109203019Sedwin# En los municipios fronterizos que se encuentren ubicados en la franja 2110203019Sedwin# fronteriza norte en el territorio comprendido entre la línea 2111203019Sedwin# internacional y la línea paralela ubicada a una distancia de veinte 2112203019Sedwin# kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el 2113203019Sedwin# interior del país, la aplicación de este horario estacional surtirá 2114203019Sedwin# efecto desde las dos horas del segundo domingo de marzo y concluirá a 2115203019Sedwin# las dos horas del primer domingo de noviembre. 2116203019Sedwin 21172742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 21182742SwollmanRule Mexico 1939 only - Feb 5 0:00 1:00 D 21192742SwollmanRule Mexico 1939 only - Jun 25 0:00 0 S 21202742SwollmanRule Mexico 1940 only - Dec 9 0:00 1:00 D 21212742SwollmanRule Mexico 1941 only - Apr 1 0:00 0 S 2122121098SwollmanRule Mexico 1943 only - Dec 16 0:00 1:00 W # War 21232742SwollmanRule Mexico 1944 only - May 1 0:00 0 S 21242742SwollmanRule Mexico 1950 only - Feb 12 0:00 1:00 D 21252742SwollmanRule Mexico 1950 only - Jul 30 0:00 0 S 212675267SwollmanRule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 212775267SwollmanRule Mexico 1996 2000 - Oct lastSun 2:00 0 S 212893799SwollmanRule Mexico 2001 only - May Sun>=1 2:00 1:00 D 212993799SwollmanRule Mexico 2001 only - Sep lastSun 2:00 0 S 213093799SwollmanRule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 213193799SwollmanRule Mexico 2002 max - Oct lastSun 2:00 0 S 21322742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 213343014Swollman# Quintana Roo 213458787SruZone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 213575267Swollman -6:00 - CST 1981 Dec 23 213643543Swollman -5:00 Mexico E%sT 1998 Aug 2 2:00 213743543Swollman -6:00 Mexico C%sT 213864499Swollman# Campeche, Yucatan 213964499SwollmanZone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 214075267Swollman -6:00 - CST 1981 Dec 23 214164499Swollman -5:00 - EST 1982 Dec 2 214264499Swollman -6:00 Mexico C%sT 2143203019Sedwin# Coahuila, Durango, Nuevo Leon, Tamaulipas (near US border) 2144203019SedwinZone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 2145203019Sedwin -6:00 - CST 1988 2146203019Sedwin -6:00 US C%sT 1989 2147203019Sedwin -6:00 Mexico C%sT 2010 2148203019Sedwin -6:00 US C%sT 2149203019Sedwin# Coahuila, Durango, Nuevo Leon, Tamaulipas (away from US border) 215075267SwollmanZone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 215164499Swollman -6:00 - CST 1988 215264499Swollman -6:00 US C%sT 1989 215364499Swollman -6:00 Mexico C%sT 215443014Swollman# Central Mexico 2155203019SedwinZone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 21562742Swollman -7:00 - MST 1927 Jun 10 23:00 21572742Swollman -6:00 - CST 1930 Nov 15 21582742Swollman -7:00 - MST 1931 May 1 23:00 21592742Swollman -6:00 - CST 1931 Oct 216075267Swollman -7:00 - MST 1932 Apr 1 216186222Swollman -6:00 Mexico C%sT 2001 Sep 30 02:00 216293799Swollman -6:00 - CST 2002 Feb 20 216393799Swollman -6:00 Mexico C%sT 2164203019Sedwin# Chihuahua (near US border) 2165203019SedwinZone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 2166203019Sedwin -7:00 - MST 1927 Jun 10 23:00 2167203019Sedwin -6:00 - CST 1930 Nov 15 2168203019Sedwin -7:00 - MST 1931 May 1 23:00 2169203019Sedwin -6:00 - CST 1931 Oct 2170203019Sedwin -7:00 - MST 1932 Apr 1 2171203019Sedwin -6:00 - CST 1996 2172203019Sedwin -6:00 Mexico C%sT 1998 2173203019Sedwin -6:00 - CST 1998 Apr Sun>=1 3:00 2174203019Sedwin -7:00 Mexico M%sT 2010 2175203019Sedwin -7:00 US M%sT 2176203019Sedwin# Chihuahua (away from US border) 217758787SruZone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 217843014Swollman -7:00 - MST 1927 Jun 10 23:00 217943014Swollman -6:00 - CST 1930 Nov 15 218043014Swollman -7:00 - MST 1931 May 1 23:00 218143014Swollman -6:00 - CST 1931 Oct 218275267Swollman -7:00 - MST 1932 Apr 1 218343014Swollman -6:00 - CST 1996 218443014Swollman -6:00 Mexico C%sT 1998 218543014Swollman -6:00 - CST 1998 Apr Sun>=1 3:00 218643014Swollman -7:00 Mexico M%sT 218758787Sru# Sonora 218858787SruZone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 218958787Sru -7:00 - MST 1927 Jun 10 23:00 219058787Sru -6:00 - CST 1930 Nov 15 219158787Sru -7:00 - MST 1931 May 1 23:00 219258787Sru -6:00 - CST 1931 Oct 219375267Swollman -7:00 - MST 1932 Apr 1 219464499Swollman -6:00 - CST 1942 Apr 24 219558787Sru -7:00 - MST 1949 Jan 14 219658787Sru -8:00 - PST 1970 219758787Sru -7:00 Mexico M%sT 1999 219858787Sru -7:00 - MST 2199207898Sedwin 2200207898Sedwin# From Alexander Krivenyshev (2010-04-21): 2201207898Sedwin# According to news, Bahía de Banderas (Mexican state of Nayarit) 2202207898Sedwin# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to 2203207898Sedwin# share the same time zone as nearby city Puerto Vallarta, Jalisco). 2204207898Sedwin# 2205207898Sedwin# (Spanish) 2206207898Sedwin# Bahía de Banderas homologa su horario al del centro del 2207207898Sedwin# país, a partir de este domingo 2208207898Sedwin# <a href="http://www.nayarit.gob.mx/notes.asp?id=20748"> 2209207898Sedwin# http://www.nayarit.gob.mx/notes.asp?id=20748 2210207898Sedwin# </a> 2211207898Sedwin# 2212207898Sedwin# Bahía de Banderas homologa su horario con el del Centro del 2213207898Sedwin# País 2214207898Sedwin# <a href="http://www.bahiadebanderas.gob.mx/principal/index.php?option=com_content&view=article&id=261:bahia-de-banderas-homologa-su-horario-con-el-del-centro-del-pais&catid=42:comunicacion-social&Itemid=50"> 2215207898Sedwin# 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" 2216207898Sedwin# </a> 2217207898Sedwin# 2218207898Sedwin# (English) 2219207898Sedwin# Puerto Vallarta and Bahía de Banderas: One Time Zone 2220207898Sedwin# <a href="http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml"> 2221207898Sedwin# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml 2222207898Sedwin# </a> 2223207898Sedwin# 2224207898Sedwin# or 2225207898Sedwin# <a href="http://www.worldtimezone.com/dst_news/dst_news_mexico08.html"> 2226207898Sedwin# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html 2227207898Sedwin# </a> 2228207898Sedwin# 2229207898Sedwin# "Mexico's Senate approved the amendments to the Mexican Schedule System that 2230207898Sedwin# will allow Bahía de Banderas and Puerto Vallarta to share the same time 2231207898Sedwin# zone ..." 223264499Swollman# Baja California Sur, Nayarit, Sinaloa 2233207898Sedwin 2234207898Sedwin# From Arthur David Olson (2010-05-01): 2235207898Sedwin# Use "Bahia_Banderas" to keep the name to fourteen characters. 2236207898Sedwin 22372742SwollmanZone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 22382742Swollman -7:00 - MST 1927 Jun 10 23:00 22392742Swollman -6:00 - CST 1930 Nov 15 22402742Swollman -7:00 - MST 1931 May 1 23:00 22412742Swollman -6:00 - CST 1931 Oct 224275267Swollman -7:00 - MST 1932 Apr 1 224364499Swollman -6:00 - CST 1942 Apr 24 22442742Swollman -7:00 - MST 1949 Jan 14 22452742Swollman -8:00 - PST 1970 224614343Swollman -7:00 Mexico M%sT 2247207898Sedwin 2248207898SedwinZone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 2249207898Sedwin -7:00 - MST 1927 Jun 10 23:00 2250207898Sedwin -6:00 - CST 1930 Nov 15 2251207898Sedwin -7:00 - MST 1931 May 1 23:00 2252207898Sedwin -6:00 - CST 1931 Oct 2253207898Sedwin -7:00 - MST 1932 Apr 1 2254207898Sedwin -6:00 - CST 1942 Apr 24 2255207898Sedwin -7:00 - MST 1949 Jan 14 2256207898Sedwin -8:00 - PST 1970 2257210718Sedwin -7:00 Mexico M%sT 2010 Apr 4 2:00 2258207898Sedwin -6:00 Mexico C%sT 2259207898Sedwin 2260203019Sedwin# Baja California (near US border) 22612742SwollmanZone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 226275267Swollman -7:00 - MST 1924 22632742Swollman -8:00 - PST 1927 Jun 10 23:00 226475267Swollman -7:00 - MST 1930 Nov 15 226575267Swollman -8:00 - PST 1931 Apr 1 226675267Swollman -8:00 1:00 PDT 1931 Sep 30 226764499Swollman -8:00 - PST 1942 Apr 24 2268158421Swollman -8:00 1:00 PWT 1945 Aug 14 23:00u 2269158421Swollman -8:00 1:00 PPT 1945 Nov 12 # Peace 227075267Swollman -8:00 - PST 1948 Apr 5 227175267Swollman -8:00 1:00 PDT 1949 Jan 14 227275267Swollman -8:00 - PST 1954 227375267Swollman -8:00 CA P%sT 1961 227475267Swollman -8:00 - PST 1976 227514343Swollman -8:00 US P%sT 1996 227675267Swollman -8:00 Mexico P%sT 2001 227793799Swollman -8:00 US P%sT 2002 Feb 20 2278203019Sedwin -8:00 Mexico P%sT 2010 2279203019Sedwin -8:00 US P%sT 2280203019Sedwin# Baja California (away from US border) 2281203019SedwinZone America/Santa_Isabel -7:39:28 - LMT 1922 Jan 1 0:20:32 2282203019Sedwin -7:00 - MST 1924 2283203019Sedwin -8:00 - PST 1927 Jun 10 23:00 2284203019Sedwin -7:00 - MST 1930 Nov 15 2285203019Sedwin -8:00 - PST 1931 Apr 1 2286203019Sedwin -8:00 1:00 PDT 1931 Sep 30 2287203019Sedwin -8:00 - PST 1942 Apr 24 2288203019Sedwin -8:00 1:00 PWT 1945 Aug 14 23:00u 2289203019Sedwin -8:00 1:00 PPT 1945 Nov 12 # Peace 2290203019Sedwin -8:00 - PST 1948 Apr 5 2291203019Sedwin -8:00 1:00 PDT 1949 Jan 14 2292203019Sedwin -8:00 - PST 1954 2293203019Sedwin -8:00 CA P%sT 1961 2294203019Sedwin -8:00 - PST 1976 2295203019Sedwin -8:00 US P%sT 1996 2296203019Sedwin -8:00 Mexico P%sT 2001 2297203019Sedwin -8:00 US P%sT 2002 Feb 20 229893799Swollman -8:00 Mexico P%sT 2299158421Swollman# From Paul Eggert (2006-03-22): 230075267Swollman# Formerly there was an America/Ensenada zone, which differed from 230175267Swollman# America/Tijuana only in that it did not observe DST from 1976 2302158421Swollman# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2303158421Swollman# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 230475267Swollman# that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and 2305158421Swollman# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 230675267Swollman# DST-observance was a town-by-town matter back then. This concerns 230775267Swollman# data after 1970 so most likely there should be at least one Zone 230875267Swollman# other than America/Tijuana for Baja, but it's not clear yet what its 230975267Swollman# name or contents should be. 23102742Swollman# 23112742Swollman# Revillagigedo Is 23122742Swollman# no information 23132742Swollman 23142742Swollman############################################################################### 23152742Swollman 23162742Swollman# Anguilla 23172742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 23182742SwollmanZone America/Anguilla -4:12:16 - LMT 1912 Mar 2 23192742Swollman -4:00 - AST 23202742Swollman 23212742Swollman# Antigua and Barbuda 23222742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 23232742SwollmanZone America/Antigua -4:07:12 - LMT 1912 Mar 2 23242742Swollman -5:00 - EST 1951 23252742Swollman -4:00 - AST 23262742Swollman 23272742Swollman# Bahamas 2328169811Swollman# 2329169811Swollman# From Sue Williams (2006-12-07): 2330169811Swollman# The Bahamas announced about a month ago that they plan to change their DST 2331169811Swollman# rules to sync with the U.S. starting in 2007.... 2332169811Swollman# http://www.jonesbahamas.com/?c=45&a=10412 2333169811Swollman 23342742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2335181421SedwinRule Bahamas 1964 1975 - Oct lastSun 2:00 0 S 2336181421SedwinRule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D 23372742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 23382742SwollmanZone America/Nassau -5:09:24 - LMT 1912 Mar 2 2339169811Swollman -5:00 Bahamas E%sT 1976 2340169811Swollman -5:00 US E%sT 23412742Swollman 23422742Swollman# Barbados 23432742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 23442742SwollmanRule Barb 1977 only - Jun 12 2:00 1:00 D 23452742SwollmanRule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 23462742SwollmanRule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 23472742SwollmanRule Barb 1979 only - Sep 30 2:00 0 S 23482742SwollmanRule Barb 1980 only - Sep 25 2:00 0 S 23492742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 23502742SwollmanZone America/Barbados -3:58:28 - LMT 1924 # Bridgetown 235143014Swollman -3:58:28 - BMT 1932 # Bridgetown Mean Time 23522742Swollman -4:00 Barb A%sT 23532742Swollman 23542742Swollman# Belize 2355158421Swollman# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. 23562742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 23572742SwollmanRule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 23582742SwollmanRule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 23592742SwollmanRule Belize 1973 only - Dec 5 0:00 1:00 D 23602742SwollmanRule Belize 1974 only - Feb 9 0:00 0 S 23612742SwollmanRule Belize 1982 only - Dec 18 0:00 1:00 D 23622742SwollmanRule Belize 1983 only - Feb 12 0:00 0 S 23632742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 23642742SwollmanZone America/Belize -5:52:48 - LMT 1912 Apr 23652742Swollman -6:00 Belize C%sT 23662742Swollman 23672742Swollman# Bermuda 2368163302Sru 2369163302Sru# From Dan Jones, reporting in The Royal Gazette (2006-06-26): 2370163302Sru 2371163302Sru# Next year, however, clocks in the US will go forward on the second Sunday 2372163302Sru# in March, until the first Sunday in November. And, after the Time Zone 2373163302Sru# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 2374163302Sru# Friday, the same thing will happen in Bermuda. 2375163302Sru# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 2376163302Sru 23772742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 23782742SwollmanZone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton 23792742Swollman -4:00 - AST 1974 Apr 28 2:00 2380163302Sru -4:00 Bahamas A%sT 1976 2381163302Sru -4:00 US A%sT 23822742Swollman 23832742Swollman# Cayman Is 23842742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 23852742SwollmanZone America/Cayman -5:25:32 - LMT 1890 # Georgetown 238643014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 23872742Swollman -5:00 - EST 23882742Swollman 23892742Swollman# Costa Rica 23902742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 23912742SwollmanRule CR 1979 1980 - Feb lastSun 0:00 1:00 D 23922742SwollmanRule CR 1979 1980 - Jun Sun>=1 0:00 0 S 239320094SwollmanRule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 2394158421Swollman# IATA SSIM (1991-09) says the following was at 1:00; 2395158421Swollman# go with Shanks & Pottenger. 239620094SwollmanRule CR 1991 only - Jul 1 0:00 0 S 239720094SwollmanRule CR 1992 only - Mar 15 0:00 0 S 23982742Swollman# There are too many San Joses elsewhere, so we'll use `Costa Rica'. 23992742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 24002742SwollmanZone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose 240158787Sru -5:36:20 - SJMT 1921 Jan 15 # San Jose Mean Time 24022742Swollman -6:00 CR C%sT 24032742Swollman# Coco 24042742Swollman# no information; probably like America/Costa_Rica 24052742Swollman 24062742Swollman# Cuba 24072742Swollman 240858787Sru# From Arthur David Olson (1999-03-29): 240958787Sru# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 241058787Sru# the Cuban National Team and the Baltimore Orioles was carried live on 241158787Sru# the Orioles Radio Network, including affiliate WTOP in Washington, DC. 241258787Sru# During the game, play-by-play announcer Jim Hunter noted that 241358787Sru# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 241458787Sru# Time today." (The "two hour" remark referred to losing one hour of 241558787Sru# sleep on 1999-03-28--when the announcers were in Cuba as it switched 241658787Sru# to DST--and one more hour on 1999-04-04--when the announcers will have 241758787Sru# returned to Baltimore, which switches on that date.) 24182742Swollman 2419138323Swollman# From Evert van der Veer via Steffen Thorsen (2004-10-28): 2420138323Swollman# Cuba is not going back to standard time this year. 2421158421Swollman# From Paul Eggert (2006-03-22): 2422138323Swollman# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 2423138323Swollman# says that it's due to a problem at the Antonio Guiteras 2424138323Swollman# thermoelectric plant, and says "This October there will be no return 2425138323Swollman# to normal hours (after daylight saving time)". 2426158421Swollman# For now, let's assume that it's a temporary measure. 2427138323Swollman 2428153670Swollman# From Carlos A. Carnero Delgado (2005-11-12): 2429153670Swollman# This year (just like in 2004-2005) there's no change in time zone 2430153670Swollman# adjustment in Cuba. We will stay in daylight saving time: 2431153670Swollman# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 2432153670Swollman 2433169811Swollman# From Jesper Norgaard Welen (2006-10-21): 2434169811Swollman# An article in GRANMA INTERNACIONAL claims that Cuba will end 2435169811Swollman# the 3 years of permanent DST next weekend, see 2436169811Swollman# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 2437169811Swollman# "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 2438169811Swollman# watches should be set back one hour -- going back to 00:00 hours -- returning 2439169811Swollman# to the normal schedule.... 2440163302Sru 2441169811Swollman# From Paul Eggert (2007-03-02): 2442169811Swollman# http://www.granma.cubaweb.cu/english/news/art89.html, dated yesterday, 2443169811Swollman# says Cuban clocks will advance at midnight on March 10. 2444169811Swollman# For lack of better information, assume Cuba will use US rules, 2445169811Swollman# except that it switches at midnight standard time as usual. 2446173319Sedwin# 2447173319Sedwin# From Steffen Thorsen (2007-10-25): 2448173319Sedwin# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week 2449173319Sedwin# earlier - on the last Sunday of October, just like in 2006. 2450173319Sedwin# 2451173319Sedwin# He supplied these references: 2452173319Sedwin# 2453173319Sedwin# http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES 2454173319Sedwin# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm 2455173319Sedwin# 2456173319Sedwin# From Alex Kryvenishev (2007-10-25): 2457173319Sedwin# Here is also article from Granma (Cuba): 2458173319Sedwin# 2459173319Sedwin# [Regira] el Horario Normal desde el [proximo] domingo 28 de octubre 2460173319Sedwin# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html 2461173319Sedwin# 2462173319Sedwin# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html 2463169811Swollman 2464177591Sedwin# From Arthur David Olson (2008-03-09): 2465177591Sedwin# I'm in Maryland which is now observing United States Eastern Daylight 2466177591Sedwin# Time. At 9:44 local time I used RealPlayer to listen to 2467177591Sedwin# <a href="http://media.enet.cu/radioreloj"> 2468177591Sedwin# http://media.enet.cu/radioreloj 2469177591Sedwin# </a>, a Cuban information station, and heard 2470177591Sedwin# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), 2471177591Sedwin# indicating that Cuba is still on standard time. 2472177591Sedwin 2473177591Sedwin# From Steffen Thorsen (2008-03-12): 2474177591Sedwin# It seems that Cuba will start DST on Sunday, 2007-03-16... 2475177591Sedwin# It was announced yesterday, according to this source (in Spanish): 2476177591Sedwin# <a href="http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm"> 2477177591Sedwin# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm 2478177591Sedwin# </a> 2479177591Sedwin# 2480177591Sedwin# Some more background information is posted here: 2481177591Sedwin# <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html"> 2482177591Sedwin# http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html 2483177591Sedwin# </a> 2484177591Sedwin# 2485177591Sedwin# The article also says that Cuba has been observing DST since 1963, 2486177591Sedwin# while Shanks (and tzdata) has 1965 as the first date (except in the 2487177591Sedwin# 1940's). Many other web pages in Cuba also claim that it has been 2488177591Sedwin# observed since 1963, but with the exception of 1970 - an exception 2489177591Sedwin# which is not present in tzdata/Shanks. So there is a chance we need to 2490177591Sedwin# change some historic records as well. 2491177591Sedwin# 2492177591Sedwin# One example: 2493177591Sedwin# <a href="http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm"> 2494177591Sedwin# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm 2495177591Sedwin# </a> 2496177591Sedwin 2497177591Sedwin# From Jesper Norgaard Welen (2008-03-13): 2498177591Sedwin# The Cuban time change has just been confirmed on the most authoritative 2499177591Sedwin# web site, the Granma. Please check out 2500177591Sedwin# <a href="http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html"> 2501177591Sedwin# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html 2502177591Sedwin# </a> 2503177591Sedwin# 2504177591Sedwin# Basically as expected after Steffen Thorsens information, the change 2505177591Sedwin# will take place midnight between Saturday and Sunday. 2506177591Sedwin 2507177591Sedwin# From Arthur David Olson (2008-03-12): 2508177591Sedwin# Assume Sun>=15 (third Sunday) going forward. 2509177591Sedwin 2510189923Sedwin# From Alexander Krivenyshev (2009-03-04) 2511189923Sedwin# According to the Radio Reloj - Cuba will start Daylight Saving Time on 2512189923Sedwin# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- 2513189923Sedwin# not on midnight March 14 / March 15 as previously thought. 2514189923Sedwin# 2515189923Sedwin# <a href="http://www.worldtimezone.com/dst_news/dst_news_cuba05.html"> 2516189923Sedwin# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html 2517189923Sedwin# (in Spanish) 2518189923Sedwin# </a> 2519189923Sedwin 2520189923Sedwin# From Arthur David Olson (2009-03-09) 2521189923Sedwin# I listened over the Internet to 2522189923Sedwin# <a href="http://media.enet.cu/readioreloj"> 2523189923Sedwin# http://media.enet.cu/readioreloj 2524189923Sedwin# </a> 2525189923Sedwin# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the 2526189923Sedwin# the time was announced as "diez cinco"--the same time as here, indicating 2527189923Sedwin# that has indeed switched to DST. Assume second Sunday from 2009 forward. 2528189923Sedwin 25292742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 25302742SwollmanRule Cuba 1928 only - Jun 10 0:00 1:00 D 25312742SwollmanRule Cuba 1928 only - Oct 10 0:00 0 S 25322742SwollmanRule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 25332742SwollmanRule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 25342742SwollmanRule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 25352742SwollmanRule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 25362742SwollmanRule Cuba 1965 only - Jun 1 0:00 1:00 D 25372742SwollmanRule Cuba 1965 only - Sep 30 0:00 0 S 25382742SwollmanRule Cuba 1966 only - May 29 0:00 1:00 D 25392742SwollmanRule Cuba 1966 only - Oct 2 0:00 0 S 25402742SwollmanRule Cuba 1967 only - Apr 8 0:00 1:00 D 25412742SwollmanRule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 25422742SwollmanRule Cuba 1968 only - Apr 14 0:00 1:00 D 25432742SwollmanRule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 25442742SwollmanRule Cuba 1969 1971 - Oct lastSun 0:00 0 S 25452742SwollmanRule Cuba 1972 1974 - Oct 8 0:00 0 S 25462742SwollmanRule Cuba 1975 1977 - Oct lastSun 0:00 0 S 25472742SwollmanRule Cuba 1978 only - May 7 0:00 1:00 D 254830711SwollmanRule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 25492742SwollmanRule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 25502742SwollmanRule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 25512742SwollmanRule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 255243014SwollmanRule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 255320094SwollmanRule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 255443014SwollmanRule Cuba 1996 only - Oct 6 0:00s 0 S 255543014SwollmanRule Cuba 1997 only - Oct 12 0:00s 0 S 255658787SruRule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 2557138323SwollmanRule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 2558187588SedwinRule Cuba 2000 2004 - Apr Sun>=1 0:00s 1:00 D 2559173319SedwinRule Cuba 2006 max - Oct lastSun 0:00s 0 S 2560177591SedwinRule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D 2561189923SedwinRule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D 2562189923SedwinRule Cuba 2009 max - Mar Sun>=8 0:00s 1:00 D 25632742Swollman 25642742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 25652742SwollmanZone America/Havana -5:29:28 - LMT 1890 256658787Sru -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 25672742Swollman -5:00 Cuba C%sT 25682742Swollman 25692742Swollman# Dominica 25702742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 25712742SwollmanZone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau 25722742Swollman -4:00 - AST 25732742Swollman 25742742Swollman# Dominican Republic 257575267Swollman 257675267Swollman# From Steffen Thorsen (2000-10-30): 257775267Swollman# Enrique Morales reported to me that the Dominican Republic has changed the 257875267Swollman# time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 257975267Swollman# http://www.listin.com.do/antes/261000/republica/princi.html 258075267Swollman 258175267Swollman# From Paul Eggert (2000-12-04): 258275267Swollman# That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 258375267Swollman 258475267Swollman# From Rives McDow (2000-12-01): 258575267Swollman# Dominican Republic changed its mind and presidential decree on Tuesday, 258675267Swollman# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 258775267Swollman# Dominican Republic will be reverting to 8 hours from the International Date 258875267Swollman# Line, and will not be using DST in the foreseeable future. The reason they 258975267Swollman# decided to use DST was to be in synch with Puerto Rico, who was also going 259075267Swollman# to implement DST. When Puerto Rico didn't implement DST, the president 259175267Swollman# decided to revert. 259275267Swollman 259375267Swollman 25942742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 25952742SwollmanRule DR 1966 only - Oct 30 0:00 1:00 D 25962742SwollmanRule DR 1967 only - Feb 28 0:00 0 S 25972742SwollmanRule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 25982742SwollmanRule DR 1970 only - Feb 21 0:00 0 S 25992742SwollmanRule DR 1971 only - Jan 20 0:00 0 S 26002742SwollmanRule DR 1972 1974 - Jan 21 0:00 0 S 26012742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 26022742SwollmanZone America/Santo_Domingo -4:39:36 - LMT 1890 26032742Swollman -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 26042742Swollman -5:00 DR E%sT 1974 Oct 27 260575267Swollman -4:00 - AST 2000 Oct 29 02:00 260675267Swollman -5:00 US E%sT 2000 Dec 3 01:00 26072742Swollman -4:00 - AST 26082742Swollman 26092742Swollman# El Salvador 2610158421Swollman 26112742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 26122742SwollmanRule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 26132742SwollmanRule Salv 1987 1988 - Sep lastSun 0:00 0 S 2614121098Swollman# There are too many San Salvadors elsewhere, so use America/El_Salvador 2615121098Swollman# instead of America/San_Salvador. 26162742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 26172742SwollmanZone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 26182742Swollman -6:00 Salv C%sT 26192742Swollman 26202742Swollman# Grenada 26212742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 262219878SwollmanZone America/Grenada -4:07:00 - LMT 1911 Jul # St George's 26232742Swollman -4:00 - AST 26242742Swollman 26252742Swollman# Guadeloupe 26262742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 26272742SwollmanZone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre 26282742Swollman -4:00 - AST 2629174242Sedwin# St Barthelemy 2630174242SedwinLink America/Guadeloupe America/St_Barthelemy 2631174242Sedwin# St Martin (French part) 2632174242SedwinLink America/Guadeloupe America/Marigot 26332742Swollman 26342742Swollman# Guatemala 2635158421Swollman# 2636158421Swollman# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 2637158421Swollman# Diario Co Latino, at 2638158421Swollman# http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079, 2639158421Swollman# says in an article dated 2006-04-19 that the Guatemalan government had 2640158421Swollman# decided on that date to advance official time by 60 minutes, to lessen the 2641158421Swollman# impact of the elevated cost of oil.... Daylight saving time will last from 2642158421Swollman# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 2643163302Sru# From Paul Eggert (2006-06-22): 2644163302Sru# The Ministry of Energy and Mines, press release CP-15/2006 2645163302Sru# (2006-04-19), says DST ends at 24:00. See 2646163302Sru# <http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf>. 2647163302Sru 26482742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 26492742SwollmanRule Guat 1973 only - Nov 25 0:00 1:00 D 26502742SwollmanRule Guat 1974 only - Feb 24 0:00 0 S 26512742SwollmanRule Guat 1983 only - May 21 0:00 1:00 D 26522742SwollmanRule Guat 1983 only - Sep 22 0:00 0 S 265320094SwollmanRule Guat 1991 only - Mar 23 0:00 1:00 D 265420094SwollmanRule Guat 1991 only - Sep 7 0:00 0 S 2655158421SwollmanRule Guat 2006 only - Apr 30 0:00 1:00 D 2656158421SwollmanRule Guat 2006 only - Oct 1 0:00 0 S 26572742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 26582742SwollmanZone America/Guatemala -6:02:04 - LMT 1918 Oct 5 26592742Swollman -6:00 Guat C%sT 26602742Swollman 26612742Swollman# Haiti 2662149514Swollman# From Gwillim Law (2005-04-15): 2663149514Swollman# Risto O. Nykanen wrote me that Haiti is now on DST. 2664149514Swollman# I searched for confirmation, and I found a 2665149514Swollman# <a href="http://www.haitianconsulate.org/time.doc"> press release 2666149514Swollman# on the Web page of the Haitian Consulate in Chicago (2005-03-31), 2667149514Swollman# </a>. Translated from French, it says: 2668149514Swollman# 2669149514Swollman# "The Prime Minister's Communication Office notifies the public in general 2670149514Swollman# and the press in particular that, following a decision of the Interior 2671149514Swollman# Ministry and the Territorial Collectivities [I suppose that means the 2672149514Swollman# provinces], Haiti will move to Eastern Daylight Time in the night from next 2673149514Swollman# Saturday the 2nd to Sunday the 3rd. 2674149514Swollman# 2675149514Swollman# "Consequently, the Prime Minister's Communication Office wishes to inform 2676149514Swollman# the population that the country's clocks will be set forward one hour 2677149514Swollman# starting at midnight. This provision will hold until the last Saturday in 2678149514Swollman# October 2005. 2679149514Swollman# 2680149514Swollman# "Port-au-Prince, March 31, 2005" 2681158421Swollman# 2682158421Swollman# From Steffen Thorsen (2006-04-04): 2683158421Swollman# I have been informed by users that Haiti observes DST this year like 2684158421Swollman# last year, so the current "only" rule for 2005 might be changed to a 2685158421Swollman# "max" rule or to last until 2006. (Who knows if they will observe DST 2686158421Swollman# next year or if they will extend their DST like US/Canada next year). 2687158421Swollman# 2688158421Swollman# I have found this article about it (in French): 2689158421Swollman# http://www.haitipressnetwork.com/news.cfm?articleID=7612 2690158421Swollman# 2691158421Swollman# The reason seems to be an energy crisis. 2692149514Swollman 2693169811Swollman# From Stephen Colebourne (2007-02-22): 2694169811Swollman# Some IATA info: Haiti won't be having DST in 2007. 2695158421Swollman 2696169811Swollman 26972742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 26982742SwollmanRule Haiti 1983 only - May 8 0:00 1:00 D 26992742SwollmanRule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 27002742SwollmanRule Haiti 1983 1987 - Oct lastSun 0:00 0 S 2701158421Swollman# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 2702158421Swollman# Go with IATA. 270343014SwollmanRule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 270443014SwollmanRule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 2705169811SwollmanRule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 2706169811SwollmanRule Haiti 2005 2006 - Oct lastSun 0:00 0 S 27072742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 27082742SwollmanZone America/Port-au-Prince -4:49:20 - LMT 1890 27092742Swollman -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 27102742Swollman -5:00 Haiti E%sT 27112742Swollman 27122742Swollman# Honduras 2713158421Swollman# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 2714158421Swollman 2715158421Swollman# From Paul Eggert (2006-05-05): 2716158421Swollman# worldtimezone.com reports a 2006-05-02 Spanish-language AP article 2717158421Swollman# saying Honduras will start using DST midnight Saturday, effective 4 2718158421Swollman# months until September. La Tribuna reported today 2719158421Swollman# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 2720163302Sru# of Honduras, refused to back down on this. 2721158421Swollman 2722163302Sru# From Jesper Norgaard Welen (2006-08-08): 2723163302Sru# It seems that Honduras has returned from DST to standard time this Monday at 2724163302Sru# 00:00 hours (prolonging Sunday to 25 hours duration). 2725163302Sru# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html 2726163302Sru 2727163302Sru# From Paul Eggert (2006-08-08): 2728163302Sru# Also see Diario El Heraldo, The country returns to standard time (2006-08-08) 2729163302Sru# <http://www.elheraldo.hn/nota.php?nid=54941&sec=12>. 2730163302Sru# It mentions executive decree 18-2006. 2731163302Sru 2732163302Sru# From Steffen Thorsen (2006-08-17): 2733163302Sru# Honduras will observe DST from 2007 to 2009, exact dates are not 2734163302Sru# published, I have located this authoritative source: 2735163302Sru# http://www.presidencia.gob.hn/noticia.aspx?nId=47 2736163302Sru 2737169811Swollman# From Steffen Thorsen (2007-03-30): 2738169811Swollman# http://www.laprensahn.com/pais_nota.php?id04962=7386 2739169811Swollman# So it seems that Honduras will not enter DST this year.... 2740169811Swollman 2741158421Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2742158421SwollmanRule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 2743158421SwollmanRule Hond 1987 1988 - Sep lastSun 0:00 0 S 2744169811SwollmanRule Hond 2006 only - May Sun>=1 0:00 1:00 D 2745169811SwollmanRule Hond 2006 only - Aug Mon>=1 0:00 0 S 27462742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 27472742SwollmanZone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 2748158421Swollman -6:00 Hond C%sT 274943543Swollman# 275043543Swollman# Great Swan I ceded by US to Honduras in 1972 27512742Swollman 27522742Swollman# Jamaica 27532742Swollman 275419878Swollman# From Bob Devine (1988-01-28): 27552742Swollman# Follows US rules. 27562742Swollman 275719878Swollman# From U. S. Naval Observatory (1989-01-19): 27582742Swollman# JAMAICA 5 H BEHIND UTC 27592742Swollman 2760158421Swollman# From Shanks & Pottenger: 27612742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 27622742SwollmanZone America/Jamaica -5:07:12 - LMT 1890 # Kingston 276343014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 276458787Sru -5:00 - EST 1974 Apr 28 2:00 276520094Swollman -5:00 US E%sT 1984 276620094Swollman -5:00 - EST 27672742Swollman 27682742Swollman# Martinique 27692742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 27702742SwollmanZone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 277186222Swollman -4:04:20 - FFMT 1911 May # Fort-de-France MT 27722742Swollman -4:00 - AST 1980 Apr 6 27732742Swollman -4:00 1:00 ADT 1980 Sep 28 27742742Swollman -4:00 - AST 27752742Swollman 27762742Swollman# Montserrat 2777158421Swollman# From Paul Eggert (2006-03-22): 2778158421Swollman# In 1995 volcanic eruptions forced evacuation of Plymouth, the capital. 2779158421Swollman# world.gazetteer.com says Cork Hill is the most populous location now. 27802742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 2781158421SwollmanZone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Cork Hill 27822742Swollman -4:00 - AST 27832742Swollman 27842742Swollman# Nicaragua 278543543Swollman# 2786158421Swollman# This uses Shanks & Pottenger for times before 2005. 278743543Swollman# 2788149514Swollman# From Steffen Thorsen (2005-04-12): 2789149514Swollman# I've got reports from 8 different people that Nicaragua just started 2790149514Swollman# DST on Sunday 2005-04-10, in order to save energy because of 2791149514Swollman# expensive petroleum. The exact end date for DST is not yet 2792149514Swollman# announced, only "September" but some sites also say "mid-September". 2793149514Swollman# Some background information is available on the President's official site: 2794149514Swollman# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 2795149514Swollman# The Decree, no 23-2005 is available here: 2796149514Swollman# 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 2797149514Swollman# 2798149514Swollman# From Paul Eggert (2005-05-01): 2799149514Swollman# The decree doesn't say anything about daylight saving, but for now let's 2800158421Swollman# assume that it is daylight saving.... 2801149514Swollman# 2802149514Swollman# From Gwillim Law (2005-04-21): 2803149514Swollman# The Associated Press story on the time change, which can be found at 2804149514Swollman# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 2805149514Swollman# and elsewhere, says (fifth paragraph, translated from Spanish): "The last 2806149514Swollman# time that a change of clocks was applied to save energy was in the year 2000 2807149514Swollman# during the Arnoldo Aleman administration."... 2808149514Swollman# The northamerica file says that Nicaragua has been on UTC-6 continuously 2809149514Swollman# since December 1998. I wasn't able to find any details of Nicaraguan time 2810149514Swollman# changes in 2000. Perhaps a note could be added to the northamerica file, to 2811149514Swollman# the effect that we have indirect evidence that DST was observed in 2000. 2812149514Swollman# 2813153670Swollman# From Jesper Norgaard Welen (2005-11-02): 2814153670Swollman# Nicaragua left DST the 2005-10-02 at 00:00 (local time). 2815153670Swollman# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 2816153670Swollman# (2005-09-26) 2817153670Swollman# 2818158421Swollman# From Jesper Norgaard Welen (2006-05-05): 2819158421Swollman# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 2820158421Swollman# (my informal translation) 2821158421Swollman# By order of the president of the republic, Enrique Bolanos, Nicaragua 2822158421Swollman# advanced by sixty minutes their official time, yesterday at 2 in the 2823158421Swollman# morning, and will stay that way until 30.th. of september. 2824158421Swollman# 2825163302Sru# From Jesper Norgaard Welen (2006-09-30): 2826163302Sru# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf 2827163302Sru# My informal translation runs: 2828163302Sru# The natural sun time is restored in all the national territory, in that the 2829163302Sru# time is returned one hour at 01:00 am of October 1 of 2006. 2830163302Sru# 28312742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 28322742SwollmanRule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 28332742SwollmanRule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 2834149514SwollmanRule Nic 2005 only - Apr 10 0:00 1:00 D 2835163302SruRule Nic 2005 only - Oct Sun>=1 0:00 0 S 2836158421SwollmanRule Nic 2006 only - Apr 30 2:00 1:00 D 2837163302SruRule Nic 2006 only - Oct Sun>=1 1:00 0 S 28382742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 28392742SwollmanZone America/Managua -5:45:08 - LMT 1890 284086222Swollman -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 28412742Swollman -6:00 - CST 1973 May 28422742Swollman -5:00 - EST 1975 Feb 16 2843158421Swollman -6:00 Nic C%sT 1992 Jan 1 4:00 2844158421Swollman -5:00 - EST 1992 Sep 24 2845158421Swollman -6:00 - CST 1993 2846158421Swollman -5:00 - EST 1997 2847149514Swollman -6:00 Nic C%sT 28482742Swollman 28492742Swollman# Panama 28502742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 28512742SwollmanZone America/Panama -5:18:08 - LMT 1890 285286222Swollman -5:19:36 - CMT 1908 Apr 22 # Colon Mean Time 28532742Swollman -5:00 - EST 28542742Swollman 28552742Swollman# Puerto Rico 28562742Swollman# There are too many San Juans elsewhere, so we'll use `Puerto_Rico'. 28572742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 285814343SwollmanZone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 28592742Swollman -4:00 - AST 1942 May 3 2860158421Swollman -4:00 US A%sT 1946 28612742Swollman -4:00 - AST 28622742Swollman 28632742Swollman# St Kitts-Nevis 28642742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 28652742SwollmanZone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre 28662742Swollman -4:00 - AST 28672742Swollman 28682742Swollman# St Lucia 28692742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 28702742SwollmanZone America/St_Lucia -4:04:00 - LMT 1890 # Castries 287186222Swollman -4:04:00 - CMT 1912 # Castries Mean Time 28722742Swollman -4:00 - AST 28732742Swollman 28742742Swollman# St Pierre and Miquelon 28752742Swollman# There are too many St Pierres elsewhere, so we'll use `Miquelon'. 28762742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 28772742SwollmanZone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 28782742Swollman -4:00 - AST 1980 May 2879121098Swollman -3:00 - PMST 1987 # Pierre & Miquelon Time 2880121098Swollman -3:00 Canada PM%sT 28812742Swollman 28822742Swollman# St Vincent and the Grenadines 28832742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 28842742SwollmanZone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown 288543014Swollman -4:04:56 - KMT 1912 # Kingstown Mean Time 28862742Swollman -4:00 - AST 28872742Swollman 28882742Swollman# Turks and Caicos 2889169811Swollman# 2890169811Swollman# From Chris Dunn in 2891169811Swollman# <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007> 2892169811Swollman# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the 2893169811Swollman# daylight saving dates for time changes have been adjusted to match 2894169811Swollman# the recent U.S. change of dates. 2895169811Swollman# 2896169811Swollman# From Brian Inglis (2007-04-28): 2897169811Swollman# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 2898169811Swollman# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 2899169811Swollman# rows before that there is an out of date entry for Oct: 2900169811Swollman# "Eastern Standard Times Begins 2007 2901169811Swollman# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 2902169811Swollman# indicating that the normal ET rules are followed. 2903169811Swollman# 2904169811Swollman# From Paul Eggert (2006-05-01): 2905158421Swollman# Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998) 2906169811Swollman# says they switch at midnight. Go with Shanks & Pottenger. 2907169811Swollman# 290820094Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2909169811SwollmanRule TC 1979 1986 - Apr lastSun 2:00 1:00 D 2910169811SwollmanRule TC 1979 2006 - Oct lastSun 2:00 0 S 2911169811SwollmanRule TC 1987 2006 - Apr Sun>=1 2:00 1:00 D 2912169811SwollmanRule TC 2007 max - Mar Sun>=8 2:00 1:00 D 2913169811SwollmanRule TC 2007 max - Nov Sun>=1 2:00 0 S 29142742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 29152742SwollmanZone America/Grand_Turk -4:44:32 - LMT 1890 291643014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 291720094Swollman -5:00 TC E%sT 29188029Swollman 291914343Swollman# British Virgin Is 29202742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 292114343SwollmanZone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town 29222742Swollman -4:00 - AST 29238029Swollman 292414343Swollman# Virgin Is 292514343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 292614343SwollmanZone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie 292714343Swollman -4:00 - AST 2928