1 # 2 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 # 4 # This code is free software; you can redistribute it and/or modify it 5 # under the terms of the GNU General Public License version 2 only, as 6 # published by the Free Software Foundation. Oracle designates this 7 # particular file as subject to the "Classpath" exception as provided 8 # by Oracle in the LICENSE file that accompanied this code. 9 # 10 # This code is distributed in the hope that it will be useful, but WITHOUT 11 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 # version 2 for more details (a copy is included in the LICENSE file that 14 # accompanied this code). 15 # 16 # You should have received a copy of the GNU General Public License version 17 # 2 along with this work; if not, write to the Free Software Foundation, 18 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 # 20 # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 # or visit www.oracle.com if you need additional information or have any 22 # questions. 23 # 24 # This file is in the public domain, so clarified as of 25 # 2009-05-17 by Arthur David Olson. 26 27 # also includes Central America and the Caribbean 28 29 # This file is by no means authoritative; if you think you know better, 30 # go ahead and edit the file (and please send any changes to 31 # tz@iana.org for general use in the future). For more, please see 32 # the file CONTRIBUTING in the tz distribution. 33 34 # From Paul Eggert (1999-03-22): 35 # A reliable and entertaining source about time zones is 36 # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). 37 38 ############################################################################### 39 40 # United States 41 42 # From Paul Eggert (1999-03-31): 43 # Howse writes (pp 121-125) that time zones were invented by 44 # Professor Charles Ferdinand Dowd (1825-1904), 45 # Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). 46 # His pamphlet "A System of National Time for Railroads" (1870) 47 # was the result of his proposals at the Convention of Railroad Trunk Lines 48 # in New York City (1869-10). His 1870 proposal was based on Washington, DC, 49 # but in 1872-05 he moved the proposed origin to Greenwich. 50 # His proposal was adopted by the railroads on 1883-11-18 at 12:00, 51 # and the most of the country soon followed suit. 52 53 # From Paul Eggert (2005-04-16): 54 # That 1883 transition occurred at 12:00 new time, not at 12:00 old time. 55 # See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). 56 57 # From Paul Eggert (2006-03-22): 58 # A good source for time zone historical data in the US is 59 # Thomas G. Shanks, The American Atlas (5th edition), 60 # San Diego: ACS Publications, Inc. (1991). 61 # Make sure you have the errata sheet; the book is somewhat useless without it. 62 # It is the source for most of the pre-1991 US entries below. 63 64 # From Paul Eggert (2001-03-06): 65 # Daylight Saving Time was first suggested as a joke by Benjamin Franklin 66 # in his whimsical essay "An Economical Project for Diminishing the Cost 67 # of Light" published in the Journal de Paris (1784-04-26). 68 # Not everyone is happy with the results: 69 # 70 # I don't really care how time is reckoned so long as there is some 71 # agreement about it, but I object to being told that I am saving 72 # daylight when my reason tells me that I am doing nothing of the kind. 73 # I even object to the implication that I am wasting something 74 # valuable if I stay in bed after the sun has risen. As an admirer 75 # of moonlight I resent the bossy insistence of those who want to 76 # reduce my time for enjoying it. At the back of the Daylight Saving 77 # scheme I detect the bony, blue-fingered hand of Puritanism, eager 78 # to push people into bed earlier, and get them up earlier, to make 79 # them healthy, wealthy and wise in spite of themselves. 80 # 81 # -- Robertson Davies, The diary of Samuel Marchbanks, 82 # Clarke, Irwin (1947), XIX, Sunday 83 # 84 # For more about the first ten years of DST in the United States, see 85 # Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint 86 # (Carnegie Library of Pittsburgh, 1927). 87 # http://www.clpgh.org/exhibit/dst.html 88 # 89 # Shanks says that DST was called "War Time" in the US in 1918 and 1919. 90 # However, DST was imposed by the Standard Time Act of 1918, which 91 # was the first nationwide legal time standard, and apparently 92 # time was just called "Standard Time" or "Daylight Saving Time". 93 94 # From Arthur David Olson: 95 # US Daylight Saving Time ended on the last Sunday of *October* in 1974. 96 # See, for example, the front page of the Saturday, 1974-10-26 97 # and Sunday, 1974-10-27 editions of the Washington Post. 98 99 # From Arthur David Olson: 100 # Before the Uniform Time Act of 1966 took effect in 1967, observance of 101 # Daylight Saving Time in the US was by local option, except during wartime. 102 103 # From Arthur David Olson (2000-09-25): 104 # Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. 105 # In the introduction, Oboler spoke of "Eastern Peace Time." 106 # An AltaVista search turned up: 107 # http://rowayton.org/rhs/hstaug45.html 108 # "When the time is announced over the radio now, it is 'Eastern Peace 109 # Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." 110 # (August 1945) by way of confirmation. 111 112 # From Joseph Gallant citing 113 # George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): 114 # At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set 115 # to switch to London for Attlee's address, but the American people 116 # never got to hear his speech live. According to one press account, 117 # CBS' Bob Trout was first to announce the word of Japan's surrender, 118 # but a few seconds later, NBC, ABC and Mutual also flashed the word 119 # of surrender, all of whom interrupting the bells of Big Ben in 120 # London which were to precede Mr. Attlee's speech. 121 122 # From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From 123 # Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: 124 # 125 # ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. 126 # Any announcement from Asia would reach St. John's New York newsroom on a 127 # wire service teletype machine, which had prescribed signals for major news. 128 # Associated Press, for example, would ring five bells before spewing out 129 # typed copy of an important story, and 10 bells for news "of transcendental 130 # importance." 131 # 132 # On Aug. 14, stalling while talking steadily into the NBC networks' open 133 # microphone, St. John heard five bells and waited only to hear a sixth bell, 134 # before announcing confidently: "Ladies and gentlemen, World War II is over. 135 # The Japanese have agreed to our surrender terms." 136 # 137 # He had scored a 20-second scoop on other broadcasters. 138 139 # From Arthur David Olson (2005-08-22): 140 # Paul has been careful to use the "US" rules only in those locations 141 # that are part of the United States; this reflects the real scope of 142 # U.S. government action. So even though the "US" rules have changed 143 # in the latest release, other countries won't be affected. 144 145 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 146 Rule US 1918 1919 - Mar lastSun 2:00 1:00 D 147 Rule US 1918 1919 - Oct lastSun 2:00 0 S 148 Rule US 1942 only - Feb 9 2:00 1:00 W # War 149 Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace 150 Rule US 1945 only - Sep lastSun 2:00 0 S 151 Rule US 1967 2006 - Oct lastSun 2:00 0 S 152 Rule US 1967 1973 - Apr lastSun 2:00 1:00 D 153 Rule US 1974 only - Jan 6 2:00 1:00 D 154 Rule US 1975 only - Feb 23 2:00 1:00 D 155 Rule US 1976 1986 - Apr lastSun 2:00 1:00 D 156 Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D 157 Rule US 2007 max - Mar Sun>=8 2:00 1:00 D 158 Rule US 2007 max - Nov Sun>=1 2:00 0 S 159 160 # From Arthur David Olson, 2005-12-19 161 # We generate the files specified below to guard against old files with 162 # obsolete information being left in the time zone binary directory. 163 # We limit the list to names that have appeared in previous versions of 164 # this time zone package. 165 # We do these as separate Zones rather than as Links to avoid problems if 166 # a particular place changes whether it observes DST. 167 # We put these specifications here in the northamerica file both to 168 # increase the chances that they'll actually get compiled and to 169 # avoid the need to duplicate the US rules in another file. 170 171 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 172 Zone EST -5:00 - EST 173 Zone MST -7:00 - MST 174 Zone HST -10:00 - HST 175 Zone EST5EDT -5:00 US E%sT 176 Zone CST6CDT -6:00 US C%sT 177 Zone MST7MDT -7:00 US M%sT 178 Zone PST8PDT -8:00 US P%sT 179 180 # From Bob Devine (1988-01-28): 181 # ...Alaska (and Hawaii) had the timezone names changed in 1967. 182 # old new 183 # Pacific Standard Time(PST) -same- 184 # Yukon Standard Time(YST) -same- 185 # Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) 186 # Nome Standard Time (NT) Bering Standard Time (BST) 187 # 188 # ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. 189 # The YST zone now covers nearly all of the state, AHST just part 190 # of the Aleutian islands. No DST. 191 192 # From Paul Eggert (1995-12-19): 193 # The tables below use 'NST', not 'NT', for Nome Standard Time. 194 # I invented 'CAWT' for Central Alaska War Time. 195 196 # From U. S. Naval Observatory (1989-01-19): 197 # USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON 198 # USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 199 # USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON 200 # USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 201 # USA MOUNTAIN 7 H BEHIND UTC DENVER 202 # USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 203 # USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO 204 # USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 205 # USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) 206 # USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) 207 # USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W 208 # USA " 9 H BEHIND UTC APR 3 - OCT 30 209 # USA HAWAII 10 H BEHIND UTC 210 # USA BERING 11 H BEHIND UTC SAMOA, MIDWAY 211 212 # From Arthur David Olson (1989-01-21): 213 # The above dates are for 1988. 214 # Note the "AKST" and "AKDT" abbreviations, the claim that there's 215 # no DST in Samoa, and the claim that there is DST in Alaska and the 216 # Aleutians. 217 218 # From Arthur David Olson (1988-02-13): 219 # Legal standard time zone names, from United States Code (1982 Edition and 220 # Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names 221 # up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 222 # took effect), as explained in sections 263 and 261: 223 # (none) 224 # United States standard eastern time 225 # United States standard mountain time 226 # United States standard central time 227 # United States standard Pacific time 228 # (none) 229 # United States standard Alaska time 230 # (none) 231 # Next, names from 1967-04-01 until 1983-11-30 (the date for 232 # public law 98-181): 233 # Atlantic standard time 234 # eastern standard time 235 # central standard time 236 # mountain standard time 237 # Pacific standard time 238 # Yukon standard time 239 # Alaska-Hawaii standard time 240 # Bering standard time 241 # And after 1983-11-30: 242 # Atlantic standard time 243 # eastern standard time 244 # central standard time 245 # mountain standard time 246 # Pacific standard time 247 # Alaska standard time 248 # Hawaii-Aleutian standard time 249 # Samoa standard time 250 # The law doesn't give abbreviations. 251 # 252 # From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: 253 # Public law 106-564 (2000-12-23) introduced ... "Chamorro Standard Time" 254 # for time in Guam and the Northern Marianas. See the file "australasia". 255 # 256 # From Paul Eggert (2015-04-17): 257 # HST and HDT are standardized abbreviations for Hawaii-Aleutian 258 # standard and daylight times. See section 9.47 (p 234) of the 259 # U.S. Government Printing Office Style Manual (2008) 260 # http://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf 261 262 # From Arthur David Olson, 2005-08-09 263 # The following was signed into law on 2005-08-08. 264 # 265 # H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. 266 # (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15 267 # U.S.C. 260a(a)) is amended-- 268 # (1) by striking "first Sunday of April" and inserting "second 269 # Sunday of March"; and 270 # (2) by striking "last Sunday of October" and inserting "first 271 # Sunday of November'. 272 # (b) Effective Date.--Subsection (a) shall take effect 1 year after the 273 # date of enactment of this Act or March 1, 2007, whichever is later. 274 # (c) Report to Congress.--Not later than 9 months after the effective 275 # date stated in subsection (b), the Secretary shall report to Congress 276 # on the impact of this section on energy consumption in the United 277 # States. 278 # (d) Right to Revert.--Congress retains the right to revert the 279 # Daylight Saving Time back to the 2005 time schedules once the 280 # Department study is complete. 281 282 # US eastern time, represented by New York 283 284 # Connecticut, Delaware, District of Columbia, most of Florida, 285 # Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky 286 # (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, 287 # New Hampshire, New Jersey, New York, North Carolina, Ohio, 288 # Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 289 # Vermont, Virginia, West Virginia 290 291 # From Dave Cantor (2004-11-02): 292 # Early this summer I had the occasion to visit the Mount Washington 293 # Observatory weather station atop (of course!) Mount Washington [, NH].... 294 # One of the staff members said that the station was on Eastern Standard Time 295 # and didn't change their clocks for Daylight Saving ... so that their 296 # reports will always have times which are 5 hours behind UTC. 297 298 # From Paul Eggert (2005-08-26): 299 # According to today's Huntsville Times 300 # http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1 301 # a few towns on Alabama's "eastern border with Georgia, such as Phenix City 302 # in Russell County, Lanett in Chambers County and some towns in Lee County, 303 # set their watches and clocks on Eastern time." It quotes H.H. "Bubba" 304 # Roberts, city administrator in Phenix City. as saying "We are in the Central 305 # time zone, but we do go by the Eastern time zone because so many people work 306 # in Columbus." 307 308 # From Paul Eggert (2014-09-06): 309 # Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208 310 # says that New York City Hall time was 3 minutes 58.4 seconds fast of 311 # Eastern time (i.e., -4:56:01.6) just before the 1883 switch. Round to the 312 # nearest second. 313 314 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 315 Rule NYC 1920 only - Mar lastSun 2:00 1:00 D 316 Rule NYC 1920 only - Oct lastSun 2:00 0 S 317 Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 318 Rule NYC 1921 1954 - Sep lastSun 2:00 0 S 319 Rule NYC 1955 1966 - Oct lastSun 2:00 0 S 320 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 321 Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 322 -5:00 US E%sT 1920 323 -5:00 NYC E%sT 1942 324 -5:00 US E%sT 1946 325 -5:00 NYC E%sT 1967 326 -5:00 US E%sT 327 328 # US central time, represented by Chicago 329 330 # Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, 331 # Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and 332 # Washington counties), Illinois, western Indiana 333 # (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 334 # Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 335 # Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 336 # Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 337 # western Tennessee, most of Texas, Wisconsin 338 339 # From Larry M. Smith (2006-04-26) re Wisconsin: 340 # http://www.legis.state.wi.us/statutes/Stat0175.pdf ... 341 # is currently enforced at the 01:00 time of change. Because the local 342 # "bar time" in the state corresponds to 02:00, a number of citations 343 # are issued for the "sale of class 'B' alcohol after prohibited 344 # hours" within the deviated hour of this change every year.... 345 # 346 # From Douglas R. Bomberg (2007-03-12): 347 # Wisconsin has enacted (nearly eleventh-hour) legislation to get WI 348 # Statue 175 closer in synch with the US Congress' intent.... 349 # http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf 350 351 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 352 Rule Chicago 1920 only - Jun 13 2:00 1:00 D 353 Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S 354 Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D 355 Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 356 Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S 357 Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S 358 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 359 Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 360 -6:00 US C%sT 1920 361 -6:00 Chicago C%sT 1936 Mar 1 2:00 362 -5:00 - EST 1936 Nov 15 2:00 363 -6:00 Chicago C%sT 1942 364 -6:00 US C%sT 1946 365 -6:00 Chicago C%sT 1967 366 -6:00 US C%sT 367 # Oliver County, ND switched from mountain to central time on 1992-10-25. 368 Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 369 -7:00 US M%sT 1992 Oct 25 2:00 370 -6:00 US C%sT 371 # Morton County, ND, switched from mountain to central time on 372 # 2003-10-26, except for the area around Mandan which was already central time. 373 # See <http://dmses.dot.gov/docimages/p63/135818.pdf>. 374 # Officially this switch also included part of Sioux County, and 375 # Jones, Mellette, and Todd Counties in South Dakota; 376 # but in practice these other counties were already observing central time. 377 # See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. 378 Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 379 -7:00 US M%sT 2003 Oct 26 2:00 380 -6:00 US C%sT 381 382 # From Josh Findley (2011-01-21): 383 # ...it appears that Mercer County, North Dakota, changed from the 384 # mountain time zone to the central time zone at the last transition from 385 # daylight-saving to standard time (on Nov. 7, 2010): 386 # http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm 387 # http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html 388 389 # From Andy Lipscomb (2011-01-24): 390 # ...according to the Census Bureau, the largest city is Beulah (although 391 # it's commonly referred to as Beulah-Hazen, with Hazen being the next 392 # largest city in Mercer County). Google Maps places Beulah's city hall 393 # at 47 degrees 15' 51" N, 101 degrees 46' 40" W, which yields an offset 394 # of 6h47'07". 395 396 Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53 397 -7:00 US M%sT 2010 Nov 7 2:00 398 -6:00 US C%sT 399 400 # US mountain time, represented by Denver 401 # 402 # Colorado, far western Kansas, Montana, western 403 # Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 404 # New Mexico, southwestern North Dakota, 405 # western South Dakota, far western Texas (El Paso County, Hudspeth County, 406 # and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 407 # 408 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 409 Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 410 Rule Denver 1920 only - Oct lastSun 2:00 0 S 411 Rule Denver 1921 only - May 22 2:00 0 S 412 Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 413 Rule Denver 1965 1966 - Oct lastSun 2:00 0 S 414 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 415 Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 416 -7:00 US M%sT 1920 417 -7:00 Denver M%sT 1942 418 -7:00 US M%sT 1946 419 -7:00 Denver M%sT 1967 420 -7:00 US M%sT 421 422 # US Pacific time, represented by Los Angeles 423 # 424 # California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 425 # Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county 426 # north of the Salmon River, and the towns of Burgdorf and Warren), 427 # Nevada (except West Wendover), Oregon (except the northern 3/4 of 428 # Malheur county), and Washington 429 # 430 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 431 Rule CA 1948 only - Mar 14 2:00 1:00 D 432 Rule CA 1949 only - Jan 1 2:00 0 S 433 Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D 434 Rule CA 1950 1961 - Sep lastSun 2:00 0 S 435 Rule CA 1962 1966 - Oct lastSun 2:00 0 S 436 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 437 Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 438 -8:00 US P%sT 1946 439 -8:00 CA P%sT 1967 440 -8:00 US P%sT 441 442 # Alaska 443 # AK%sT is the modern abbreviation for -9:00 per USNO. 444 # 445 # From Paul Eggert (2001-05-30): 446 # Howse writes that Alaska switched from the Julian to the Gregorian calendar, 447 # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 448 # This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 449 # also a Friday. Include only the time zone part of this transition, 450 # ignoring the switch from Julian to Gregorian, since we can't represent 451 # the Julian calendar. 452 # 453 # As far as we know, none of the exact locations mentioned below were 454 # permanently inhabited in 1867 by anyone using either calendar. 455 # (Yakutat was colonized by the Russians in 1799, but the settlement 456 # was destroyed in 1805 by a Yakutat-kon war party.) However, there 457 # were nearby inhabitants in some cases and for our purposes perhaps 458 # it's best to simply use the official transition. 459 460 # From Paul Eggert (2014-07-18): 461 # One opinion of the early-1980s turmoil in Alaska over time zones and 462 # daylight saving time appeared as graffiti on a Juneau airport wall: 463 # "Welcome to Juneau. Please turn your watch back to the 19th century." 464 # See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01. 465 # http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html 466 # 467 # Steve Ferguson (2011-01-31) referred to the following source: 468 # Norris F. Keeping time in Alaska: national directives, local response. 469 # Alaska History 2001;16(1-2). 470 # http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/ 471 472 # From Arthur David Olson (2011-02-01): 473 # Here's database-relevant material from the 2001 "Alaska History" article: 474 # 475 # On September 20 [1979]...DOT...officials decreed that on April 27, 476 # 1980, Juneau and other nearby communities would move to Yukon Time. 477 # Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on 478 # Pacific Time. 479 # 480 # ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the 481 # Department's September 1979 decision. Juneau and other communities in 482 # northern Southeast reverted to Pacific Time on October 26. 483 # 484 # On October 28 [1983]...the Metlakatla Indian Community Council voted 485 # unanimously to keep the reservation on Pacific Time. 486 # 487 # According to DOT official Joanne Petrie, Indian reservations are not 488 # bound to follow time zones imposed by neighboring jurisdictions. 489 # 490 # (The last is consistent with how the database now handles the Navajo 491 # Nation.) 492 493 # From Arthur David Olson (2011-02-09): 494 # I just spoke by phone with a staff member at the Metlakatla Indian 495 # Community office (using contact information available at 496 # http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla 497 # It's shortly after 1:00 here on the east coast of the United States; 498 # the staffer said it was shortly after 10:00 there. When I asked whether 499 # that meant they were on Pacific time, they said no - they were on their 500 # own time. I asked about daylight saving; they said it wasn't used. I 501 # did not inquire about practices in the past. 502 503 # From Arthur David Olson (2011-08-17): 504 # For lack of better information, assume that Metlakatla's 505 # abandonment of use of daylight saving resulted from the 1983 vote. 506 507 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 508 Zone America/Juneau 15:02:19 - LMT 1867 Oct 18 509 -8:57:41 - LMT 1900 Aug 20 12:00 510 -8:00 - PST 1942 511 -8:00 US P%sT 1946 512 -8:00 - PST 1969 513 -8:00 US P%sT 1980 Apr 27 2:00 514 -9:00 US Y%sT 1980 Oct 26 2:00 515 -8:00 US P%sT 1983 Oct 30 2:00 516 -9:00 US Y%sT 1983 Nov 30 517 -9:00 US AK%sT 518 Zone America/Sitka 14:58:47 - LMT 1867 Oct 18 519 -9:01:13 - LMT 1900 Aug 20 12:00 520 -8:00 - PST 1942 521 -8:00 US P%sT 1946 522 -8:00 - PST 1969 523 -8:00 US P%sT 1983 Oct 30 2:00 524 -9:00 US Y%sT 1983 Nov 30 525 -9:00 US AK%sT 526 Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 18 527 -8:46:18 - LMT 1900 Aug 20 12:00 528 -8:00 - PST 1942 529 -8:00 US P%sT 1946 530 -8:00 - PST 1969 531 -8:00 US P%sT 1983 Oct 30 2:00 532 -8:00 - PST 533 Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 534 -9:18:55 - LMT 1900 Aug 20 12:00 535 -9:00 - YST 1942 536 -9:00 US Y%sT 1946 537 -9:00 - YST 1969 538 -9:00 US Y%sT 1983 Nov 30 539 -9:00 US AK%sT 540 Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18 541 -9:59:36 - LMT 1900 Aug 20 12:00 542 -10:00 - CAT 1942 543 -10:00 US CAT/CAWT 1945 Aug 14 23:00u 544 -10:00 US CAT/CAPT 1946 # Peace 545 -10:00 - CAT 1967 Apr 546 -10:00 - AHST 1969 547 -10:00 US AH%sT 1983 Oct 30 2:00 548 -9:00 US Y%sT 1983 Nov 30 549 -9:00 US AK%sT 550 Zone America/Nome 12:58:21 - LMT 1867 Oct 18 551 -11:01:38 - LMT 1900 Aug 20 12:00 552 -11:00 - NST 1942 553 -11:00 US N%sT 1946 554 -11:00 - NST 1967 Apr 555 -11:00 - BST 1969 556 -11:00 US B%sT 1983 Oct 30 2:00 557 -9:00 US Y%sT 1983 Nov 30 558 -9:00 US AK%sT 559 Zone America/Adak 12:13:21 - LMT 1867 Oct 18 560 -11:46:38 - LMT 1900 Aug 20 12:00 561 -11:00 - NST 1942 562 -11:00 US N%sT 1946 563 -11:00 - NST 1967 Apr 564 -11:00 - BST 1969 565 -11:00 US B%sT 1983 Oct 30 2:00 566 -10:00 US AH%sT 1983 Nov 30 567 -10:00 US H%sT 568 # The following switches don't quite make our 1970 cutoff. 569 # 570 # Shanks writes that part of southwest Alaska (e.g. Aniak) 571 # switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 572 # and another part (e.g. Akiak) made the same switch five weeks later. 573 # 574 # From David Flater (2004-11-09): 575 # In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 576 # Historic Preservation Commission, provided this information, which 577 # suggests that Unalaska deviated from statutory time from early 1967 578 # possibly until 1983: 579 # 580 # Minutes of the Unalaska City Council Meeting, January 10, 1967: 581 # "Except for St. Paul and Akutan, Unalaska is the only important 582 # location not on Alaska Standard Time. The following resolution was 583 # made by William Robinson and seconded by Henry Swanson: Be it 584 # resolved that the City of Unalaska hereby goes to Alaska Standard 585 # Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 586 # January 14, Alaska Standard Time.) This resolution was passed with 587 # three votes for and one against." 588 589 # Hawaii 590 591 # From Arthur David Olson (2010-12-09): 592 # "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 593 # of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, 594 # the article is available at 595 # http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf 596 # and indicates that standard time was adopted effective noon, January 597 # 13, 1896 (page 218), that in "1933, the Legislature decreed daylight 598 # saving for the period between the last Sunday of each April and the 599 # last Sunday of each September, but less than a month later repealed the 600 # act," (page 220), that year-round daylight saving time was in effect 601 # from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for 602 # when clocks changed) and that clocks were changed by 30 minutes 603 # effective the second Sunday of June, 1947 (page 219, with no time of 604 # day given for when clocks changed). A footnote for the 1933 changes 605 # cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) 606 # and Act 163 (approved 21 May 1933)." 607 608 # From Arthur David Olson (2011-01-19): 609 # The following is from "Laws of the Territory of Hawaii Passed by the 610 # Seventeenth Legislature: Regular Session 1933," available (as of 611 # 2011-01-19) at American University's Pence Law Library. Page 85: "Act 612 # 90...At 2 o'clock ante meridian of the last Sunday in April of each 613 # year, the standard time of this Territory shall be advanced one 614 # hour...This Act shall take effect upon its approval. Approved this 26th 615 # day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of 616 # Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is 617 # hereby repealed...This Act shall take effect upon its approval, upon 618 # which date the standard time of this Territory shall be restored to 619 # that existing immediately prior to the taking effect of said Act 90. 620 # Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor 621 # of the Territory of Hawaii." 622 # 623 # Note that 1933-05-21 was a Sunday. 624 # We're left to guess the time of day when Act 163 was approved; guess noon. 625 626 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 627 Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 628 -10:30 - HST 1933 Apr 30 2:00 629 -10:30 1:00 HDT 1933 May 21 12:00 630 -10:30 - HST 1942 Feb 9 2:00 631 -10:30 1:00 HDT 1945 Sep 30 2:00 632 -10:30 - HST 1947 Jun 8 2:00 633 -10:00 - HST 634 Link Pacific/Honolulu Pacific/Johnston 635 636 # Now we turn to US areas that have diverged from the consensus since 1970. 637 638 # Arizona mostly uses MST. 639 640 # From Paul Eggert (2002-10-20): 641 # 642 # The information in the rest of this paragraph is derived from the 643 # Daylight Saving Time web page 644 # <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23) 645 # maintained by the Arizona State Library, Archives and Public Records. 646 # Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 647 # time, but by federal law railroads, airlines, bus lines, military 648 # personnel, and some engaged in interstate commerce continued to 649 # observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 650 # Gazette says that was the date the law changed, and that 04-01 was 651 # the date the state's clocks would change. In 1945 the State of 652 # Arizona used standard time all year, again with exceptions only as 653 # mandated by federal law. Arizona observed DST in 1967, but Arizona 654 # Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 655 # 656 # Shanks says the 1944 experiment came to an end on 1944-03-17. 657 # Go with the Arizona State Library instead. 658 659 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 660 Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 661 -7:00 US M%sT 1944 Jan 1 0:01 662 -7:00 - MST 1944 Apr 1 0:01 663 -7:00 US M%sT 1944 Oct 1 0:01 664 -7:00 - MST 1967 665 -7:00 US M%sT 1968 Mar 21 666 -7:00 - MST 667 # From Arthur David Olson (1988-02-13): 668 # A writer from the Inter Tribal Council of Arizona, Inc., 669 # notes in private correspondence dated 1987-12-28 that "Presently, only the 670 # Navajo Nation participates in the Daylight Saving Time policy, due to its 671 # large size and location in three states." (The "only" means that other 672 # tribal nations don't use DST.) 673 # 674 # From Paul Eggert (2013-08-26): 675 # See America/Denver for a zone appropriate for the Navajo Nation. 676 677 # Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 678 # Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 679 # Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 680 # Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 681 # Teton, Twin Falls, Valley, Washington counties, and the southern 682 # quarter of Idaho county) and eastern Oregon (most of Malheur County) 683 # switched four weeks late in 1974. 684 # 685 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 686 Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 687 -8:00 US P%sT 1923 May 13 2:00 688 -7:00 US M%sT 1974 689 -7:00 - MST 1974 Feb 3 2:00 690 -7:00 US M%sT 691 692 # Indiana 693 # 694 # For a map of Indiana's time zone regions, see: 695 # http://en.wikipedia.org/wiki/Time_in_Indiana 696 # 697 # From Paul Eggert (2007-08-17): 698 # Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 699 # with the following exceptions: 700 # 701 # - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 702 # Vanderburgh, and Warrick counties have been like America/Chicago. 703 # 704 # - Dearborn and Ohio counties have been like America/New_York. 705 # 706 # - Clark, Floyd, and Harrison counties have been like 707 # America/Kentucky/Louisville. 708 # 709 # - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, 710 # and Switzerland counties have their own time zone histories as noted below. 711 # 712 # Shanks partitioned Indiana into 345 regions, each with its own time history, 713 # and wrote "Even newspaper reports present contradictory information." 714 # Those Hoosiers! Such a flighty and changeable people! 715 # Fortunately, most of the complexity occurred before our cutoff date of 1970. 716 # 717 # Other than Indianapolis, the Indiana place names are so nondescript 718 # that they would be ambiguous if we left them at the 'America' level. 719 # So we reluctantly put them all in a subdirectory 'America/Indiana'. 720 721 # From Paul Eggert (2014-06-26): 722 # https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana 723 # says "DOT is relocating the time zone boundary in Indiana to move Starke, 724 # Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 725 # Eastern Time Zone to the Central Time Zone.... The effective date of 726 # this rule is 2 a.m. EST Sunday, April 2, 2006, which is the 727 # changeover date from standard time to Daylight Saving Time." 728 # Strictly speaking, this meant the affected counties changed their 729 # clocks twice that night, but this obviously was in error. The intent 730 # was that 01:59:59 EST be followed by 02:00:00 CDT. 731 732 # From Gwillim Law (2007-02-10): 733 # The Associated Press has been reporting that Pulaski County, Indiana is 734 # going to switch from Central to Eastern Time on March 11, 2007.... 735 # http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 736 737 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 738 Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D 739 Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 740 Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 741 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 742 Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 743 -6:00 US C%sT 1920 744 -6:00 Indianapolis C%sT 1942 745 -6:00 US C%sT 1946 746 -6:00 Indianapolis C%sT 1955 Apr 24 2:00 747 -5:00 - EST 1957 Sep 29 2:00 748 -6:00 - CST 1958 Apr 27 2:00 749 -5:00 - EST 1969 750 -5:00 US E%sT 1971 751 -5:00 - EST 2006 752 -5:00 US E%sT 753 # 754 # Eastern Crawford County, Indiana, left its clocks alone in 1974, 755 # as well as from 1976 through 2005. 756 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 757 Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D 758 Rule Marengo 1951 only - Sep lastSun 2:00 0 S 759 Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 760 Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S 761 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 762 Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 763 -6:00 US C%sT 1951 764 -6:00 Marengo C%sT 1961 Apr 30 2:00 765 -5:00 - EST 1969 766 -5:00 US E%sT 1974 Jan 6 2:00 767 -6:00 1:00 CDT 1974 Oct 27 2:00 768 -5:00 US E%sT 1976 769 -5:00 - EST 2006 770 -5:00 US E%sT 771 # 772 # Daviess, Dubois, Knox, and Martin Counties, Indiana, 773 # switched from eastern to central time in April 2006, then switched back 774 # in November 2007. 775 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 776 Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 777 Rule Vincennes 1946 only - Sep lastSun 2:00 0 S 778 Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 779 Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 780 Rule Vincennes 1955 only - May 1 0:00 1:00 D 781 Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 782 Rule Vincennes 1960 only - Oct lastSun 2:00 0 S 783 Rule Vincennes 1961 only - Sep lastSun 2:00 0 S 784 Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 785 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 786 Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 787 -6:00 US C%sT 1946 788 -6:00 Vincennes C%sT 1964 Apr 26 2:00 789 -5:00 - EST 1969 790 -5:00 US E%sT 1971 791 -5:00 - EST 2006 Apr 2 2:00 792 -6:00 US C%sT 2007 Nov 4 2:00 793 -5:00 US E%sT 794 # 795 # Perry County, Indiana, switched from eastern to central time in April 2006. 796 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 797 Rule Perry 1946 only - Apr lastSun 2:00 1:00 D 798 Rule Perry 1946 only - Sep lastSun 2:00 0 S 799 Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D 800 Rule Perry 1953 1959 - Sep lastSun 2:00 0 S 801 Rule Perry 1955 only - May 1 0:00 1:00 D 802 Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D 803 Rule Perry 1960 only - Oct lastSun 2:00 0 S 804 Rule Perry 1961 only - Sep lastSun 2:00 0 S 805 Rule Perry 1962 1963 - Oct lastSun 2:00 0 S 806 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 807 Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 808 -6:00 US C%sT 1946 809 -6:00 Perry C%sT 1964 Apr 26 2:00 810 -5:00 - EST 1969 811 -5:00 US E%sT 1971 812 -5:00 - EST 2006 Apr 2 2:00 813 -6:00 US C%sT 814 # 815 # Pike County, Indiana moved from central to eastern time in 1977, 816 # then switched back in 2006, then switched back again in 2007. 817 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 818 Rule Pike 1955 only - May 1 0:00 1:00 D 819 Rule Pike 1955 1960 - Sep lastSun 2:00 0 S 820 Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 821 Rule Pike 1961 1964 - Oct lastSun 2:00 0 S 822 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 823 Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 824 -6:00 US C%sT 1955 825 -6:00 Pike C%sT 1965 Apr 25 2:00 826 -5:00 - EST 1966 Oct 30 2:00 827 -6:00 US C%sT 1977 Oct 30 2:00 828 -5:00 - EST 2006 Apr 2 2:00 829 -6:00 US C%sT 2007 Nov 4 2:00 830 -5:00 US E%sT 831 # 832 # Starke County, Indiana moved from central to eastern time in 1991, 833 # then switched back in 2006. 834 # From Arthur David Olson (1991-10-28): 835 # An article on page A3 of the Sunday, 1991-10-27 Washington Post 836 # notes that Starke County switched from Central time to Eastern time as of 837 # 1991-10-27. 838 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 839 Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 840 Rule Starke 1947 1954 - Sep lastSun 2:00 0 S 841 Rule Starke 1955 1956 - Oct lastSun 2:00 0 S 842 Rule Starke 1957 1958 - Sep lastSun 2:00 0 S 843 Rule Starke 1959 1961 - Oct lastSun 2:00 0 S 844 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 845 Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 846 -6:00 US C%sT 1947 847 -6:00 Starke C%sT 1962 Apr 29 2:00 848 -5:00 - EST 1963 Oct 27 2:00 849 -6:00 US C%sT 1991 Oct 27 2:00 850 -5:00 - EST 2006 Apr 2 2:00 851 -6:00 US C%sT 852 # 853 # Pulaski County, Indiana, switched from eastern to central time in 854 # April 2006 and then switched back in March 2007. 855 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 856 Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 857 Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 858 Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 859 Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 860 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 861 Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 862 -6:00 US C%sT 1946 863 -6:00 Pulaski C%sT 1961 Apr 30 2:00 864 -5:00 - EST 1969 865 -5:00 US E%sT 1971 866 -5:00 - EST 2006 Apr 2 2:00 867 -6:00 US C%sT 2007 Mar 11 2:00 868 -5:00 US E%sT 869 # 870 # Switzerland County, Indiana, did not observe DST from 1973 through 2005. 871 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 872 Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 873 -6:00 US C%sT 1954 Apr 25 2:00 874 -5:00 - EST 1969 875 -5:00 US E%sT 1973 876 -5:00 - EST 2006 877 -5:00 US E%sT 878 879 # Part of Kentucky left its clocks alone in 1974. 880 # This also includes Clark, Floyd, and Harrison counties in Indiana. 881 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 882 Rule Louisville 1921 only - May 1 2:00 1:00 D 883 Rule Louisville 1921 only - Sep 1 2:00 0 S 884 Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 885 Rule Louisville 1941 only - Sep lastSun 2:00 0 S 886 Rule Louisville 1946 only - Jun 2 2:00 0 S 887 Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S 888 Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S 889 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 890 Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 891 -6:00 US C%sT 1921 892 -6:00 Louisville C%sT 1942 893 -6:00 US C%sT 1946 894 -6:00 Louisville C%sT 1961 Jul 23 2:00 895 -5:00 - EST 1968 896 -5:00 US E%sT 1974 Jan 6 2:00 897 -6:00 1:00 CDT 1974 Oct 27 2:00 898 -5:00 US E%sT 899 # 900 # Wayne County, Kentucky 901 # 902 # From Lake Cumberland LIFE 903 # http://www.lake-cumberland.com/life/archive/news990129time.shtml 904 # (1999-01-29) via WKYM-101.7: 905 # Clinton County has joined Wayne County in asking the DoT to change from 906 # the Central to the Eastern time zone.... The Wayne County government made 907 # the same request in December. And while Russell County officials have not 908 # taken action, the majority of respondents to a poll conducted there in 909 # August indicated they would like to change to "fast time" also. 910 # The three Lake Cumberland counties are the farthest east of any U.S. 911 # location in the Central time zone. 912 # 913 # From Rich Wales (2000-08-29): 914 # After prolonged debate, and despite continuing deep differences of opinion, 915 # Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 916 # (-0500) time. They won't "fall back" this year. See Sara Shipley, 917 # The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 918 # 919 # From Paul Eggert (2001-07-16): 920 # The final rule was published in the 921 # Federal Register 65, 160 (2000-08-17), pp 50154-50158. 922 # http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22 923 # 924 Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 925 -6:00 US C%sT 1946 926 -6:00 - CST 1968 927 -6:00 US C%sT 2000 Oct 29 2:00 928 -5:00 US E%sT 929 930 931 # From Rives McDow (2000-08-30): 932 # Here ... are all the changes in the US since 1985. 933 # Kearny County, KS (put all of county on central; 934 # previously split between MST and CST) ... 1990-10 935 # Starke County, IN (from CST to EST) ... 1991-10 936 # Oliver County, ND (from MST to CST) ... 1992-10 937 # West Wendover, NV (from PST TO MST) ... 1999-10 938 # Wayne County, KY (from CST to EST) ... 2000-10 939 # 940 # From Paul Eggert (2001-07-17): 941 # We don't know where the line used to be within Kearny County, KS, 942 # so omit that change for now. 943 # See America/Indiana/Knox for the Starke County, IN change. 944 # See America/North_Dakota/Center for the Oliver County, ND change. 945 # West Wendover, NV officially switched from Pacific to mountain time on 946 # 1999-10-31. See the 947 # Federal Register 64, 203 (1999-10-21), pp 56705-56707. 948 # http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15 949 # However, the Federal Register says that West Wendover already operated 950 # on mountain time, and the rule merely made this official; 951 # hence a separate tz entry is not needed. 952 953 # Michigan 954 # 955 # From Bob Devine (1988-01-28): 956 # Michigan didn't observe DST from 1968 to 1973. 957 # 958 # From Paul Eggert (1999-03-31): 959 # Shanks writes that Michigan started using standard time on 1885-09-18, 960 # but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 961 # that Detroit kept 962 # 963 # local time until 1900 when the City Council decreed that clocks should 964 # be put back twenty-eight minutes to Central Standard Time. Half the 965 # city obeyed, half refused. After considerable debate, the decision 966 # was rescinded and the city reverted to Sun time. A derisive offer to 967 # erect a sundial in front of the city hall was referred to the 968 # Committee on Sewers. Then, in 1905, Central time was adopted 969 # by city vote. 970 # 971 # This story is too entertaining to be false, so go with Howse over Shanks. 972 # 973 # From Paul Eggert (2001-03-06): 974 # Garland (1927) writes "Cleveland and Detroit advanced their clocks 975 # one hour in 1914." This change is not in Shanks. We have no more 976 # info, so omit this for now. 977 # 978 # Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 979 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 980 Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D 981 Rule Detroit 1948 only - Sep lastSun 2:00 0 S 982 Rule Detroit 1967 only - Jun 14 2:00 1:00 D 983 Rule Detroit 1967 only - Oct lastSun 2:00 0 S 984 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 985 Zone America/Detroit -5:32:11 - LMT 1905 986 -6:00 - CST 1915 May 15 2:00 987 -5:00 - EST 1942 988 -5:00 US E%sT 1946 989 -5:00 Detroit E%sT 1973 990 -5:00 US E%sT 1975 991 -5:00 - EST 1975 Apr 27 2:00 992 -5:00 US E%sT 993 # 994 # Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 995 # switched from EST to CST/CDT in 1973. 996 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 997 Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D 998 Rule Menominee 1946 only - Sep lastSun 2:00 0 S 999 Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D 1000 Rule Menominee 1966 only - Oct lastSun 2:00 0 S 1001 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1002 Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 1003 -6:00 US C%sT 1946 1004 -6:00 Menominee C%sT 1969 Apr 27 2:00 1005 -5:00 - EST 1973 Apr 29 2:00 1006 -6:00 US C%sT 1007 1008 # Navassa 1009 # administered by the US Fish and Wildlife Service 1010 # claimed by US under the provisions of the 1856 Guano Islands Act 1011 # also claimed by Haiti 1012 # occupied 1857/1900 by the Navassa Phosphate Co 1013 # US lighthouse 1917/1996-09 1014 # currently uninhabited 1015 # see Mark Fineman, "An Isle Rich in Guano and Discord", 1016 # _Los Angeles Times_ (1998-11-10), A1, A10; it cites 1017 # Jimmy Skaggs, _The Great Guano Rush_ (1994). 1018 1019 ################################################################################ 1020 1021 1022 # From Paul Eggert (2014-10-31): 1023 # 1024 # Unless otherwise specified, the source for data through 1990 is: 1025 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 1026 # San Diego: ACS Publications, Inc. (2003). 1027 # Unfortunately this book contains many errors and cites no sources. 1028 # 1029 # Gwillim Law writes that a good source 1030 # for recent time zone data is the International Air Transport 1031 # Association's Standard Schedules Information Manual (IATA SSIM), 1032 # published semiannually. Law sent in several helpful summaries 1033 # of the IATA's data after 1990. Except where otherwise noted, 1034 # IATA SSIM is the source for entries after 1990. 1035 # 1036 # Other sources occasionally used include: 1037 # 1038 # Edward W. Whitman, World Time Differences, 1039 # Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 1040 # which I found in the UCLA library. 1041 # 1042 # William Willett, The Waste of Daylight, 19th edition 1043 # <http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf> 1044 # [PDF] (1914-03) 1045 # 1046 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 1047 # <http://www.jstor.org/stable/1774359>. 1048 # 1049 # See the 'europe' file for Greenland. 1050 1051 # Canada 1052 1053 # From Alain LaBonté (1994-11-14): 1054 # I post here the time zone abbreviations standardized in Canada 1055 # for both English and French in the CAN/CSA-Z234.4-89 standard.... 1056 # 1057 # UTC Standard time Daylight saving time 1058 # offset French English French English 1059 # -2:30 - - HAT NDT 1060 # -3 - - HAA ADT 1061 # -3:30 HNT NST - - 1062 # -4 HNA AST HAE EDT 1063 # -5 HNE EST HAC CDT 1064 # -6 HNC CST HAR MDT 1065 # -7 HNR MST HAP PDT 1066 # -8 HNP PST HAY YDT 1067 # -9 HNY YST - - 1068 # 1069 # HN: Heure Normale ST: Standard Time 1070 # HA: Heure Avancée DT: Daylight saving Time 1071 # 1072 # A: de l'Atlantique Atlantic 1073 # C: du Centre Central 1074 # E: de l'Est Eastern 1075 # M: Mountain 1076 # N: Newfoundland 1077 # P: du Pacifique Pacific 1078 # R: des Rocheuses 1079 # T: de Terre-Neuve 1080 # Y: du Yukon Yukon 1081 # 1082 # From Paul Eggert (1994-11-22): 1083 # Alas, this sort of thing must be handled by localization software. 1084 1085 # Unless otherwise specified, the data entries for Canada are all from Shanks 1086 # & Pottenger. 1087 1088 # From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 1089 # 2007-03-01): 1090 # The British Columbia government announced yesterday that it will 1091 # adjust daylight savings next year to align with changes in the 1092 # U.S. and the rest of Canada.... 1093 # http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm 1094 # ... 1095 # Nova Scotia 1096 # Daylight saving time will be extended by four weeks starting in 2007.... 1097 # http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf 1098 # 1099 # [For New Brunswick] the new legislation dictates that the time change is to 1100 # be done at 02:00 instead of 00:01. 1101 # http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 1102 # ... 1103 # Manitoba has traditionally changed the clock every fall at 03:00. 1104 # As of 2006, the transition is to take place one hour earlier at 02:00. 1105 # http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 1106 # ... 1107 # [Alberta, Ontario, Quebec] will follow US rules. 1108 # http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 1109 # http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 1110 # http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 1111 # ... 1112 # P.E.I. will follow US rules.... 1113 # http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 1114 # ... 1115 # Province of Newfoundland and Labrador.... 1116 # http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 1117 # ... 1118 # Yukon 1119 # http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 1120 # ... 1121 # N.W.T. will follow US rules. Whoever maintains the government web site 1122 # does not seem to believe in bookmarks. To see the news release, click the 1123 # following link and search for "Daylight Savings Time Change". Press the 1124 # "Daylight Savings Time Change" link; it will fire off a popup using 1125 # JavaScript. 1126 # http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 1127 # ... 1128 # Nunavut 1129 # An amendment to the Interpretation Act was registered on February 19/2007.... 1130 # http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 1131 1132 # From Paul Eggert (2014-10-18): 1133 # H. David Matthews and Mary Vincent's map 1134 # "It's about TIME", _Canadian Geographic_ (September-October 1998) 1135 # http://www.canadiangeographic.ca/Magazine/SO98/alacarte.asp 1136 # contains detailed boundaries for regions observing nonstandard 1137 # time and daylight saving time arrangements in Canada circa 1998. 1138 # 1139 # National Research Council Canada maintains info about time zones and DST. 1140 # http://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html 1141 # http://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5 1142 # Its unofficial information is often taken from Matthews and Vincent. 1143 1144 # From Paul Eggert (2006-06-27): 1145 # For now, assume all of DST-observing Canada will fall into line with the 1146 # new US DST rules, 1147 1148 # From Chris Walton (2011-12-01) 1149 # In the first of Tammy Hardwick's articles 1150 # http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1151 # she quotes the Friday November 1/1918 edition of the Creston Review. 1152 # The quote includes these two statements: 1153 # 'Sunday the CPR went back to the old system of time...' 1154 # '... The daylight saving scheme was dropped all over Canada at the same time,' 1155 # These statements refer to a transition from daylight time to standard time 1156 # that occurred nationally on Sunday October 27/1918. This transition was 1157 # also documented in the Saturday October 26/1918 edition of the Toronto Star. 1158 1159 # In light of that evidence, we alter the date from the earlier believed 1160 # Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day 1161 # than Thursday) in all Canadian rulesets. 1162 1163 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1164 Rule Canada 1918 only - Apr 14 2:00 1:00 D 1165 Rule Canada 1918 only - Oct 27 2:00 0 S 1166 Rule Canada 1942 only - Feb 9 2:00 1:00 W # War 1167 Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 1168 Rule Canada 1945 only - Sep 30 2:00 0 S 1169 Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 1170 Rule Canada 1974 2006 - Oct lastSun 2:00 0 S 1171 Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 1172 Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 1173 Rule Canada 2007 max - Nov Sun>=1 2:00 0 S 1174 1175 1176 # Newfoundland and Labrador 1177 1178 # From Paul Eggert (2000-10-02): 1179 # Matthews and Vincent (1998) write that Labrador should use NST/NDT, 1180 # but the only part of Labrador that follows the rules is the 1181 # southeast corner, including Port Hope Simpson and Mary's Harbour, 1182 # but excluding, say, Black Tickle. 1183 1184 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1185 Rule StJohns 1917 only - Apr 8 2:00 1:00 D 1186 Rule StJohns 1917 only - Sep 17 2:00 0 S 1187 # Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 1188 Rule StJohns 1919 only - May 5 23:00 1:00 D 1189 Rule StJohns 1919 only - Aug 12 23:00 0 S 1190 # For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 1191 Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 1192 Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S 1193 # For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 1194 # Pottenger. 1195 Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 1196 Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 1197 # Whitman gives the following transitions: 1198 # 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 1199 # but go with Shanks & Pottenger and assume they used Canadian rules. 1200 # For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 1201 # Apr 30 - Sep 24; go with Shanks & Pottenger. 1202 Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 1203 Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 1204 Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 1205 Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S 1206 Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S 1207 # From Paul Eggert (2000-10-02): 1208 # INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 1209 # at 00:01 local time. For now, assume it started in 1987. 1210 1211 # From Michael Pelley (2011-09-12): 1212 # We received today, Monday, September 12, 2011, notification that the 1213 # changes to the Newfoundland Standard Time Act have been proclaimed. 1214 # The change in the Act stipulates that the change from Daylight Savings 1215 # Time to Standard Time and from Standard Time to Daylight Savings Time 1216 # now occurs at 2:00AM. 1217 # ... 1218 # http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm 1219 # ... 1220 # MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery 1221 # Office of the Chief Information Officer 1222 # Executive Council 1223 # Government of Newfoundland & Labrador 1224 1225 Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 1226 Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S 1227 Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 1228 Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1229 Rule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D 1230 Rule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S 1231 # 1232 # St John's has an apostrophe, but Posix file names can't have apostrophes. 1233 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1234 Zone America/St_Johns -3:30:52 - LMT 1884 1235 -3:30:52 StJohns N%sT 1918 1236 -3:30:52 Canada N%sT 1919 1237 -3:30:52 StJohns N%sT 1935 Mar 30 1238 -3:30 StJohns N%sT 1942 May 11 1239 -3:30 Canada N%sT 1946 1240 -3:30 StJohns N%sT 2011 Nov 1241 -3:30 Canada N%sT 1242 1243 # most of east Labrador 1244 1245 # The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'. 1246 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1247 Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 1248 -3:30:52 - NST 1918 1249 -3:30:52 Canada N%sT 1919 1250 -3:30:52 - NST 1935 Mar 30 1251 -3:30 - NST 1936 1252 -3:30 StJohns N%sT 1942 May 11 1253 -3:30 Canada N%sT 1946 1254 -3:30 StJohns N%sT 1966 Mar 15 2:00 1255 -4:00 StJohns A%sT 2011 Nov 1256 -4:00 Canada A%sT 1257 1258 1259 # west Labrador, Nova Scotia, Prince Edward I 1260 1261 # From Brian Inglis (2015-07-20): 1262 # From the historical weather station records available at: 1263 # https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada 1264 # Sydney shares the same time history as Glace Bay, so was 1265 # likely to be the same across the island.... 1266 # Sydney, as the capital and most populous location, or Cape Breton, would 1267 # have been better names for the zone had we known this in 1996. 1268 1269 # From Paul Eggert (2015-07-20): 1270 # Shanks & Pottenger write that since 1970 most of this region has been like 1271 # Halifax. Many locales did not observe peacetime DST until 1972; 1272 # the Cape Breton area, represented by Glace Bay, is the largest we know of 1273 # (Glace Bay was perhaps not the best name choice but no point changing now). 1274 # Shanks & Pottenger also write that Liverpool, NS was the only town 1275 # in Canada to observe DST in 1971 but not 1970; for now we'll assume 1276 # this is a typo. 1277 1278 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1279 Rule Halifax 1916 only - Apr 1 0:00 1:00 D 1280 Rule Halifax 1916 only - Oct 1 0:00 0 S 1281 Rule Halifax 1920 only - May 9 0:00 1:00 D 1282 Rule Halifax 1920 only - Aug 29 0:00 0 S 1283 Rule Halifax 1921 only - May 6 0:00 1:00 D 1284 Rule Halifax 1921 1922 - Sep 5 0:00 0 S 1285 Rule Halifax 1922 only - Apr 30 0:00 1:00 D 1286 Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1287 Rule Halifax 1923 only - Sep 4 0:00 0 S 1288 Rule Halifax 1924 only - Sep 15 0:00 0 S 1289 Rule Halifax 1925 only - Sep 28 0:00 0 S 1290 Rule Halifax 1926 only - May 16 0:00 1:00 D 1291 Rule Halifax 1926 only - Sep 13 0:00 0 S 1292 Rule Halifax 1927 only - May 1 0:00 1:00 D 1293 Rule Halifax 1927 only - Sep 26 0:00 0 S 1294 Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1295 Rule Halifax 1928 only - Sep 9 0:00 0 S 1296 Rule Halifax 1929 only - Sep 3 0:00 0 S 1297 Rule Halifax 1930 only - Sep 15 0:00 0 S 1298 Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1299 Rule Halifax 1932 only - May 1 0:00 1:00 D 1300 Rule Halifax 1933 only - Apr 30 0:00 1:00 D 1301 Rule Halifax 1933 only - Oct 2 0:00 0 S 1302 Rule Halifax 1934 only - May 20 0:00 1:00 D 1303 Rule Halifax 1934 only - Sep 16 0:00 0 S 1304 Rule Halifax 1935 only - Jun 2 0:00 1:00 D 1305 Rule Halifax 1935 only - Sep 30 0:00 0 S 1306 Rule Halifax 1936 only - Jun 1 0:00 1:00 D 1307 Rule Halifax 1936 only - Sep 14 0:00 0 S 1308 Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1309 Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1310 Rule Halifax 1939 only - May 28 0:00 1:00 D 1311 Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1312 Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1313 Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1314 Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1315 Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1316 Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1317 Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1318 Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1319 Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S 1320 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1321 Zone America/Halifax -4:14:24 - LMT 1902 Jun 15 1322 -4:00 Halifax A%sT 1918 1323 -4:00 Canada A%sT 1919 1324 -4:00 Halifax A%sT 1942 Feb 9 2:00s 1325 -4:00 Canada A%sT 1946 1326 -4:00 Halifax A%sT 1974 1327 -4:00 Canada A%sT 1328 Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 1329 -4:00 Canada A%sT 1953 1330 -4:00 Halifax A%sT 1954 1331 -4:00 - AST 1972 1332 -4:00 Halifax A%sT 1974 1333 -4:00 Canada A%sT 1334 1335 # New Brunswick 1336 1337 # From Paul Eggert (2007-01-31): 1338 # The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 1339 # says they changed at 00:01 through 2006, and 1340 # <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1341 # clear that this was the case since at least 1993. 1342 # For now, assume it started in 1993. 1343 1344 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1345 Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1346 Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1347 Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1348 Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1349 Rule Moncton 1939 only - May 27 1:00 1:00 D 1350 Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1351 Rule Moncton 1940 only - May 19 1:00 1:00 D 1352 Rule Moncton 1941 only - May 4 1:00 1:00 D 1353 Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1354 Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1355 Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1356 Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1357 Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1358 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1359 Zone America/Moncton -4:19:08 - LMT 1883 Dec 9 1360 -5:00 - EST 1902 Jun 15 1361 -4:00 Canada A%sT 1933 1362 -4:00 Moncton A%sT 1942 1363 -4:00 Canada A%sT 1946 1364 -4:00 Moncton A%sT 1973 1365 -4:00 Canada A%sT 1993 1366 -4:00 Moncton A%sT 2007 1367 -4:00 Canada A%sT 1368 1369 # Quebec 1370 1371 # From Paul Eggert (2015-03-24): 1372 # See America/Toronto for most of Quebec, including Montreal. 1373 # 1374 # Matthews and Vincent (1998) also write that Quebec east of the -63 1375 # meridian is supposed to observe AST, but residents as far east as 1376 # Natashquan use EST/EDT, and residents east of Natashquan use AST. 1377 # The Quebec department of justice writes in 1378 # "The situation in Minganie and Basse-Côte-Nord" 1379 # http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm 1380 # that the coastal strip from just east of Natashquan to Blanc-Sablon 1381 # observes Atlantic standard time all year round. 1382 # http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en 1383 # says this common practice was codified into law as of 2007. 1384 # For lack of better info, guess this practice began around 1970, contra to 1385 # Shanks & Pottenger who have this region observing AST/ADT. 1386 1387 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1388 Zone America/Blanc-Sablon -3:48:28 - LMT 1884 1389 -4:00 Canada A%sT 1970 1390 -4:00 - AST 1391 1392 # Ontario 1393 1394 # From Paul Eggert (2006-07-09): 1395 # Shanks & Pottenger write that since 1970 most of Ontario has been like 1396 # Toronto. 1397 # Thunder Bay skipped DST in 1973. 1398 # Many smaller locales did not observe peacetime DST until 1974; 1399 # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1400 # Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 1401 1402 # From Mark Brader (2003-07-26): 1403 # [According to the Toronto Star] Orillia, Ontario, adopted DST 1404 # effective Saturday, 1912-06-22, 22:00; the article mentions that 1405 # Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1406 # have already done so. In Orillia DST was to run until Saturday, 1407 # 1912-08-31 (no time mentioned), but it was met with considerable 1408 # hostility from certain segments of the public, and was revoked after 1409 # only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but 1410 # presumably that should be -07-06. (1912-06-19, -07-12; also letters 1411 # earlier in June). 1412 # 1413 # Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1414 1415 # From Paul Eggert (1997-10-17): 1416 # Mark Brader writes that an article in the 1997-10-14 Toronto Star 1417 # says that Atikokan, Ontario currently does not observe DST, 1418 # but will vote on 11-10 whether to use EST/EDT. 1419 # He also writes that the Ontario Time Act (1990, Chapter T.9) 1420 # http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html 1421 # says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 1422 # Officially Atikokan is therefore on CST/CDT, and most likely this report 1423 # concerns a non-official time observed as a matter of local practice. 1424 # 1425 # From Paul Eggert (2000-10-02): 1426 # Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 1427 # New Osnaburgh observe CST all year, that Big Trout Lake observes 1428 # CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 1429 # violation of the official Ontario rules. 1430 # 1431 # From Paul Eggert (2006-07-09): 1432 # Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the 1433 # 2005-07-21 Chronicle-Journal, which said: 1434 # 1435 # The clocks in Atikokan stay set on standard time year-round. 1436 # This means they spend about half the time on central time and 1437 # the other half on eastern time. 1438 # 1439 # For the most part, the system works, Mayor Dennis Brown said. 1440 # 1441 # "The majority of businesses in Atikokan deal more with Eastern 1442 # Canada, but there are some that deal with Western Canada," he 1443 # said. "I don't see any changes happening here." 1444 # 1445 # Walton also writes "Supposedly Pickle Lake and Mishkeegogamang 1446 # [New Osnaburgh] follow the same practice." 1447 1448 # From Garry McKinnon (2006-07-14) via Chris Walton: 1449 # I chatted with a member of my board who has an outstanding memory 1450 # and a long history in Atikokan (and in the telecom industry) and he 1451 # can say for certain that Atikokan has been practicing the current 1452 # time keeping since 1952, at least. 1453 1454 # From Paul Eggert (2006-07-17): 1455 # Shanks & Pottenger say that Atikokan has agreed with Rainy River 1456 # ever since standard time was introduced, but the information from 1457 # McKinnon sounds more authoritative. For now, assume that Atikokan 1458 # switched to EST immediately after WWII era daylight saving time 1459 # ended. This matches the old (less-populous) America/Coral_Harbour 1460 # entry since our cutoff date of 1970, so we can move 1461 # America/Coral_Harbour to the 'backward' file. 1462 1463 # From Mark Brader (2010-03-06): 1464 # 1465 # Currently the database has: 1466 # 1467 # # Ontario 1468 # 1469 # # From Paul Eggert (2006-07-09): 1470 # # Shanks & Pottenger write that since 1970 most of Ontario has been like 1471 # # Toronto. 1472 # # Thunder Bay skipped DST in 1973. 1473 # # Many smaller locales did not observe peacetime DST until 1974; 1474 # # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1475 # 1476 # In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom 1477 # right corner of page 1, it says that Toronto will return to standard 1478 # time at 2 am Sunday morning (which agrees with the database), and that: 1479 # 1480 # The one-hour setback will go into effect throughout most of Ontario, 1481 # except in areas like Windsor which remains on standard time all year. 1482 # 1483 # Windsor is, of course, a lot larger than Nipigon. 1484 # 1485 # I only came across this incidentally. I don't know if Windsor began 1486 # observing DST when Detroit did, or in 1974, or on some other date. 1487 # 1488 # By the way, the article continues by noting that: 1489 # 1490 # Some cities in the United States have pushed the deadline back 1491 # three weeks and will change over from daylight saving in October. 1492 1493 # From Arthur David Olson (2010-07-17): 1494 # 1495 # "Standard Time and Time Zones in Canada" appeared in 1496 # The Journal of The Royal Astronomical Society of Canada, 1497 # volume 26, number 2 (February 1932) and, as of 2010-07-17, 1498 # was available at 1499 # http://adsabs.harvard.edu/full/1932JRASC..26...49S 1500 # 1501 # It includes the text below (starting on page 57): 1502 # 1503 # A list of the places in Canada using daylight saving time would 1504 # require yearly revision. From information kindly furnished by 1505 # the provincial governments and by the postmasters in many cities 1506 # and towns, it is found that the following places used daylight sav- 1507 # ing in 1930. The information for the province of Quebec is definite, 1508 # for the other provinces only approximate: 1509 # 1510 # Province Daylight saving time used 1511 # Prince Edward Island Not used. 1512 # Nova Scotia In Halifax only. 1513 # New Brunswick In St. John only. 1514 # Quebec In the following places: 1515 # Montreal Lachine 1516 # Quebec Mont-Royal 1517 # Lévis Iberville 1518 # St. Lambert Cap de la Madelèine 1519 # Verdun Loretteville 1520 # Westmount Richmond 1521 # Outremont St. Jérôme 1522 # Longueuil Greenfield Park 1523 # Arvida Waterloo 1524 # Chambly-Canton Beaulieu 1525 # Melbourne La Tuque 1526 # St. Théophile Buckingham 1527 # Ontario Used generally in the cities and towns along 1528 # the southerly part of the province. Not 1529 # used in the northwesterly part. 1530 # Manitoba Not used. 1531 # Saskatchewan In Regina only. 1532 # Alberta Not used. 1533 # British Columbia Not used. 1534 # 1535 # With some exceptions, the use of daylight saving may be said to be limited 1536 # to those cities and towns lying between Quebec city and Windsor, Ont. 1537 1538 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1539 Rule Toronto 1919 only - Mar 30 23:30 1:00 D 1540 Rule Toronto 1919 only - Oct 26 0:00 0 S 1541 Rule Toronto 1920 only - May 2 2:00 1:00 D 1542 Rule Toronto 1920 only - Sep 26 0:00 0 S 1543 Rule Toronto 1921 only - May 15 2:00 1:00 D 1544 Rule Toronto 1921 only - Sep 15 2:00 0 S 1545 Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1546 # Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1547 # was meant. 1548 Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1549 Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1550 # The 1927-to-1939 rules can be expressed more simply as 1551 # Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1552 # Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1553 # Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1554 # Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1555 # The rules below avoid use of Sun>=25 1556 # (which pre-2004 versions of zic cannot handle). 1557 Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1558 Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1559 Rule Toronto 1932 only - May 1 2:00 1:00 D 1560 Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1561 Rule Toronto 1933 only - Oct 1 2:00 0 S 1562 Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1563 Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1564 Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1565 Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1566 Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1567 Rule Toronto 1949 only - Nov lastSun 0:00 0 S 1568 Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1569 Rule Toronto 1950 only - Nov lastSun 2:00 0 S 1570 Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1571 # Shanks & Pottenger say Toronto ended DST a week early in 1971, 1572 # namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 1573 # is wrong, and that he had confirmed it by checking the 1971-10-30 1574 # Toronto Star, which said that DST was ending 1971-10-31 as usual. 1575 Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1576 1577 # From Paul Eggert (2003-07-27): 1578 # Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1579 # Port Arthur, Ontario, the principle of the Bill has been in 1580 # operation for the past three years, and in the City of Moose Jaw, 1581 # Saskatchewan, for one year." 1582 1583 # From David Bryan via Tory Tronrud, Director/Curator, 1584 # Thunder Bay Museum (2003-11-12): 1585 # There is some suggestion, however, that, by-law or not, daylight 1586 # savings time was being practiced in Fort William and Port Arthur 1587 # before 1909.... [I]n 1910, the line between the Eastern and Central 1588 # Time Zones was permanently moved about two hundred miles west to 1589 # include the Thunder Bay area.... When Canada adopted daylight 1590 # savings time in 1916, Fort William and Port Arthur, having done so 1591 # already, did not change their clocks.... During the Second World 1592 # War,... [t]he cities agreed to implement DST during the summer 1593 # months for the remainder of the war years. 1594 1595 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1596 Zone America/Toronto -5:17:32 - LMT 1895 1597 -5:00 Canada E%sT 1919 1598 -5:00 Toronto E%sT 1942 Feb 9 2:00s 1599 -5:00 Canada E%sT 1946 1600 -5:00 Toronto E%sT 1974 1601 -5:00 Canada E%sT 1602 Zone America/Thunder_Bay -5:57:00 - LMT 1895 1603 -6:00 - CST 1910 1604 -5:00 - EST 1942 1605 -5:00 Canada E%sT 1970 1606 -5:00 Toronto E%sT 1973 1607 -5:00 - EST 1974 1608 -5:00 Canada E%sT 1609 Zone America/Nipigon -5:53:04 - LMT 1895 1610 -5:00 Canada E%sT 1940 Sep 29 1611 -5:00 1:00 EDT 1942 Feb 9 2:00s 1612 -5:00 Canada E%sT 1613 Zone America/Rainy_River -6:18:16 - LMT 1895 1614 -6:00 Canada C%sT 1940 Sep 29 1615 -6:00 1:00 CDT 1942 Feb 9 2:00s 1616 -6:00 Canada C%sT 1617 Zone America/Atikokan -6:06:28 - LMT 1895 1618 -6:00 Canada C%sT 1940 Sep 29 1619 -6:00 1:00 CDT 1942 Feb 9 2:00s 1620 -6:00 Canada C%sT 1945 Sep 30 2:00 1621 -5:00 - EST 1622 1623 1624 # Manitoba 1625 1626 # From Rob Douglas (2006-04-06): 1627 # the old Manitoba Time Act - as amended by Bill 2, assented to 1628 # March 27, 1987 ... said ... 1629 # "between two o'clock Central Standard Time in the morning of 1630 # the first Sunday of April of each year and two o'clock Central 1631 # Standard Time in the morning of the last Sunday of October next 1632 # following, one hour in advance of Central Standard Time."... 1633 # I believe that the English legislation [of the old time act] had 1634 # been assented to (March 22, 1967).... 1635 # Also, as far as I can tell, there was no order-in-council varying 1636 # the time of Daylight Saving Time for 2005 and so the provisions of 1637 # the 1987 version would apply - the changeover was at 2:00 Central 1638 # Standard Time (i.e. not until 3:00 Central Daylight Time). 1639 1640 # From Paul Eggert (2006-04-10): 1641 # Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1642 # starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1643 # it was also 02:00s in 1966. 1644 1645 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1646 Rule Winn 1916 only - Apr 23 0:00 1:00 D 1647 Rule Winn 1916 only - Sep 17 0:00 0 S 1648 Rule Winn 1918 only - Apr 14 2:00 1:00 D 1649 Rule Winn 1918 only - Oct 27 2:00 0 S 1650 Rule Winn 1937 only - May 16 2:00 1:00 D 1651 Rule Winn 1937 only - Sep 26 2:00 0 S 1652 Rule Winn 1942 only - Feb 9 2:00 1:00 W # War 1653 Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 1654 Rule Winn 1945 only - Sep lastSun 2:00 0 S 1655 Rule Winn 1946 only - May 12 2:00 1:00 D 1656 Rule Winn 1946 only - Oct 13 2:00 0 S 1657 Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 1658 Rule Winn 1947 1949 - Sep lastSun 2:00 0 S 1659 Rule Winn 1950 only - May 1 2:00 1:00 D 1660 Rule Winn 1950 only - Sep 30 2:00 0 S 1661 Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 1662 Rule Winn 1951 1958 - Sep lastSun 2:00 0 S 1663 Rule Winn 1959 only - Oct lastSun 2:00 0 S 1664 Rule Winn 1960 only - Sep lastSun 2:00 0 S 1665 Rule Winn 1963 only - Apr lastSun 2:00 1:00 D 1666 Rule Winn 1963 only - Sep 22 2:00 0 S 1667 Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1668 Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1669 Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 1670 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1671 Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1672 -6:00 Winn C%sT 2006 1673 -6:00 Canada C%sT 1674 1675 1676 # Saskatchewan 1677 1678 # From Mark Brader (2003-07-26): 1679 # The first actual adoption of DST in Canada was at the municipal 1680 # level. As the [Toronto] Star put it (1912-06-07), "While people 1681 # elsewhere have long been talking of legislation to save daylight, 1682 # the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1683 # DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1684 # presumably late evening, as below), and would run until "the end of 1685 # the summer". The discrepancy between municipal time and railroad 1686 # time was noted. 1687 1688 # From Paul Eggert (2003-07-27): 1689 # Willett (1914-03) notes that DST "has been in operation ... in the 1690 # City of Moose Jaw, Saskatchewan, for one year." 1691 1692 # From Paul Eggert (2006-03-22): 1693 # Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 1694 # Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 1695 # Other western towns (e.g. Lloydminster) are like Edmonton. 1696 # Matthews and Vincent (1998) write that Denare Beach and Creighton 1697 # are like Winnipeg, in violation of Saskatchewan law. 1698 1699 # From W. Jones (1992-11-06): 1700 # The. . .below is based on information I got from our law library, the 1701 # provincial archives, and the provincial Community Services department. 1702 # A precise history would require digging through newspaper archives, and 1703 # since you didn't say what you wanted, I didn't bother. 1704 # 1705 # Saskatchewan is split by a time zone meridian (105W) and over the years 1706 # the boundary became pretty ragged as communities near it reevaluated 1707 # their affiliations in one direction or the other. In 1965 a provincial 1708 # referendum favoured legislating common time practices. 1709 # 1710 # On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 1711 # Saskatchewan 1978) was proclaimed, and established that the eastern 1712 # part of Saskatchewan would use CST year round, that districts in 1713 # northwest Saskatchewan would by default follow CST but could opt to 1714 # follow Mountain Time rules (thus 1 hour difference in the winter and 1715 # zero in the summer), and that districts in southwest Saskatchewan would 1716 # by default follow MT but could opt to follow CST. 1717 # 1718 # It took a few years for the dust to settle (I know one story of a town 1719 # on one time zone having its school in another, such that a mom had to 1720 # serve her family lunch in two shifts), but presently it seems that only 1721 # a few towns on the border with Alberta (e.g. Lloydminster) follow MT 1722 # rules any more; all other districts appear to have used CST year round 1723 # since sometime in the 1960s. 1724 1725 # From Chris Walton (2006-06-26): 1726 # The Saskatchewan time act which was last updated in 1996 is about 30 pages 1727 # long and rather painful to read. 1728 # http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 1729 1730 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1731 Rule Regina 1918 only - Apr 14 2:00 1:00 D 1732 Rule Regina 1918 only - Oct 27 2:00 0 S 1733 Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 1734 Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 1735 Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 1736 Rule Regina 1937 only - Oct Sun>=8 0:00 0 S 1737 Rule Regina 1938 only - Oct Sun>=1 0:00 0 S 1738 Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1739 Rule Regina 1942 only - Feb 9 2:00 1:00 W # War 1740 Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 1741 Rule Regina 1945 only - Sep lastSun 2:00 0 S 1742 Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 1743 Rule Regina 1946 only - Oct Sun>=8 2:00 0 S 1744 Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1745 Rule Regina 1947 1957 - Sep lastSun 2:00 0 S 1746 Rule Regina 1959 only - Apr lastSun 2:00 1:00 D 1747 Rule Regina 1959 only - Oct lastSun 2:00 0 S 1748 # 1749 Rule Swift 1957 only - Apr lastSun 2:00 1:00 D 1750 Rule Swift 1957 only - Oct lastSun 2:00 0 S 1751 Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 1752 Rule Swift 1959 only - Oct lastSun 2:00 0 S 1753 Rule Swift 1960 1961 - Sep lastSun 2:00 0 S 1754 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1755 Zone America/Regina -6:58:36 - LMT 1905 Sep 1756 -7:00 Regina M%sT 1960 Apr lastSun 2:00 1757 -6:00 - CST 1758 Zone America/Swift_Current -7:11:20 - LMT 1905 Sep 1759 -7:00 Canada M%sT 1946 Apr lastSun 2:00 1760 -7:00 Regina M%sT 1950 1761 -7:00 Swift M%sT 1972 Apr lastSun 2:00 1762 -6:00 - CST 1763 1764 1765 # Alberta 1766 1767 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1768 Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 1769 Rule Edm 1918 only - Oct 27 2:00 0 S 1770 Rule Edm 1919 only - May 27 2:00 0 S 1771 Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 1772 Rule Edm 1920 only - Oct lastSun 2:00 0 S 1773 Rule Edm 1921 1923 - Sep lastSun 2:00 0 S 1774 Rule Edm 1942 only - Feb 9 2:00 1:00 W # War 1775 Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 1776 Rule Edm 1945 only - Sep lastSun 2:00 0 S 1777 Rule Edm 1947 only - Apr lastSun 2:00 1:00 D 1778 Rule Edm 1947 only - Sep lastSun 2:00 0 S 1779 Rule Edm 1967 only - Apr lastSun 2:00 1:00 D 1780 Rule Edm 1967 only - Oct lastSun 2:00 0 S 1781 Rule Edm 1969 only - Apr lastSun 2:00 1:00 D 1782 Rule Edm 1969 only - Oct lastSun 2:00 0 S 1783 Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1784 Rule Edm 1972 2006 - Oct lastSun 2:00 0 S 1785 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1786 Zone America/Edmonton -7:33:52 - LMT 1906 Sep 1787 -7:00 Edm M%sT 1987 1788 -7:00 Canada M%sT 1789 1790 1791 # British Columbia 1792 1793 # From Paul Eggert (2006-03-22): 1794 # Shanks & Pottenger write that since 1970 most of this region has 1795 # been like Vancouver. 1796 # Dawson Creek uses MST. Much of east BC is like Edmonton. 1797 # Matthews and Vincent (1998) write that Creston is like Dawson Creek. 1798 1799 # It seems though that (re: Creston) is not entirely correct: 1800 1801 # From Chris Walton (2011-12-01): 1802 # There are two areas within the Canadian province of British Columbia 1803 # that do not currently observe daylight saving: 1804 # a) The Creston Valley (includes the town of Creston and surrounding area) 1805 # b) The eastern half of the Peace River Regional District 1806 # (includes the cities of Dawson Creek and Fort St. John) 1807 1808 # Earlier this year I stumbled across a detailed article about the time 1809 # keeping history of Creston; it was written by Tammy Hardwick who is the 1810 # manager of the Creston & District Museum. The article was written in May 2009. 1811 # http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1812 # According to the article, Creston has not changed its clocks since June 1918. 1813 # i.e. Creston has been stuck on UTC-7 for 93 years. 1814 # Dawson Creek, on the other hand, changed its clocks as recently as April 1972. 1815 1816 # Unfortunately the exact date for the time change in June 1918 remains 1817 # unknown and will be difficult to ascertain. I e-mailed Tammy a few months 1818 # ago to ask if Sunday June 2 was a reasonable guess. She said it was just 1819 # as plausible as any other date (in June). She also said that after writing 1820 # the article she had discovered another time change in 1916; this is the 1821 # subject of another article which she wrote in October 2010. 1822 # http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56 1823 1824 # Here is a summary of the three clock change events in Creston's history: 1825 # 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7) 1826 # Exact date unknown 1827 # 2. Oct 1916: switch to Pacific Standard Time (GMT-8) 1828 # Exact date in October unknown; Sunday October 1 is a reasonable guess. 1829 # 3. June 1918: switch to Pacific Daylight Time (GMT-7) 1830 # Exact date in June unknown; Sunday June 2 is a reasonable guess. 1831 # note 1: 1832 # On Oct 27/1918 when daylight saving ended in the rest of Canada, 1833 # Creston did not change its clocks. 1834 # note 2: 1835 # During WWII when the Federal Government legislated a mandatory clock change, 1836 # Creston did not oblige. 1837 # note 3: 1838 # There is no guarantee that Creston will remain on Mountain Standard Time 1839 # (UTC-7) forever. 1840 # The subject was debated at least once this year by the town Council. 1841 # http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html 1842 1843 # During a period WWII, summer time (Daylight saying) was mandatory in Canada. 1844 # In Creston, that was handled by shifting the area to PST (-8:00) then applying 1845 # summer time to cause the offset to be -7:00, the same as it had been before 1846 # the change. It can be argued that the timezone abbreviation during this 1847 # period should be PDT rather than MST, but that doesn't seem important enough 1848 # (to anyone) to further complicate the rules. 1849 1850 # The transition dates (and times) are guesses. 1851 1852 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1853 Rule Vanc 1918 only - Apr 14 2:00 1:00 D 1854 Rule Vanc 1918 only - Oct 27 2:00 0 S 1855 Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1856 Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 1857 Rule Vanc 1945 only - Sep 30 2:00 0 S 1858 Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 1859 Rule Vanc 1946 only - Oct 13 2:00 0 S 1860 Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S 1861 Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S 1862 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1863 Zone America/Vancouver -8:12:28 - LMT 1884 1864 -8:00 Vanc P%sT 1987 1865 -8:00 Canada P%sT 1866 Zone America/Dawson_Creek -8:00:56 - LMT 1884 1867 -8:00 Canada P%sT 1947 1868 -8:00 Vanc P%sT 1972 Aug 30 2:00 1869 -7:00 - MST 1870 Zone America/Creston -7:46:04 - LMT 1884 1871 -7:00 - MST 1916 Oct 1 1872 -8:00 - PST 1918 Jun 2 1873 -7:00 - MST 1874 1875 # Northwest Territories, Nunavut, Yukon 1876 1877 # From Paul Eggert (2006-03-22): 1878 # Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 1879 # Mathew Englander (1996-10-07) gives the following refs: 1880 # * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 1881 # c. 7 defines Yukon standard time as UTC-9.... 1882 # see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 1883 # [http://canlii.ca/t/7vhg] 1884 # * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 1885 # * O.I.C. 1980/02 established DST. 1886 # * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 1887 1888 # From Brian Inglis (2015-04-14): 1889 # 1890 # I tried to trace the history of Yukon time and found the following 1891 # regulations, giving the reference title and URL if found, regulation name, 1892 # and relevant quote if available. Each regulation specifically revokes its 1893 # predecessor. The final reference is to the current Interpretation Act 1894 # authorizing and resulting from these regulatory changes. 1895 # 1896 # Only recent regulations were retrievable via Yukon government site search or 1897 # index, and only some via Canadian legal sources. Other sources used include 1898 # articles titled "Standard Time and Time Zones in Canada" from JRASC via ADS 1899 # Abstracts, cited by ADO for 1932 ..., and updated versions from 1958 and 1900 # 1970 quoted below; each article includes current extracts from provincial 1901 # and territorial ST and DST regulations at the end, summaries and details of 1902 # standard times and daylight saving time at many locations across Canada, 1903 # with time zone maps, tables and calculations for Canadian Sunrise, Sunset, 1904 # and LMST; they also cover many countries and global locations, with a chart 1905 # and table showing current Universal Time offsets, and may be useful as 1906 # another source of information for 1970 and earlier. 1907 # 1908 # * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26, 1909 # pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS) 1910 # http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75: 1911 # Yukon Interpretation Ordinance 1912 # Yukon standard time is the local mean time at the one hundred and 1913 # thirty-fifth meridian. 1914 # 1915 # * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.; 1916 # JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System 1917 # (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1: 1918 # Yukon Interpretation Ordinance, 1955, Chap. 16. 1919 # 1920 # (1) Subject to this section, standard time shall be reckoned as nine 1921 # hours behind Greenwich Time and called Yukon Standard Time. 1922 # 1923 # (2) Notwithstanding subsection (1), the Commissioner may make regulations 1924 # varying the manner of reckoning standard time. 1925 # 1926 # * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance 1927 # http://? - no online source found 1928 # 1929 # * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC, 1930 # Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS) 1931 # http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon 1932 # Territory Commissioner's Order 1967-59 Interpretation Ordinance ... 1933 # 1934 # 1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon 1935 # Territory on 27th January, 1966, is hereby revoked. 1936 # 1937 # 2. Yukon (East) Standard Time as defined by section 36 of the 1938 # Interpretation Ordinance from and after mid-night on the 28th day of May, 1939 # 1967 shall be reckoned in the same manner as Pacific Standard Time, that 1940 # is to say, eight hours behind Greenwich Time in the area of the Yukon 1941 # Territory lying east of the 138th degree longitude west. 1942 # 1943 # 3. In the remainder of the Territory, lying west of the 138th degree 1944 # longitude west, Yukon (West) Standard Time shall be reckoned as nine 1945 # hours behind Greenwich Time. 1946 # 1947 # * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214 1948 # http://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html 1949 # C.O. 1973/214 INTERPRETATION ACT ... 1950 # 1951 # 1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby 1952 # revoked. 1953 # 1954 # 2. Yukon Standard Time as defined by section 36 of the Interpretation 1955 # Act from and after midnight on the twenty-eighth day of October, 1973 1956 # shall be reckoned in the same manner as Pacific Standard Time, that is 1957 # to say eight hours behind Greenwich Time. 1958 # 1959 # * O.I.C. 1980/02 INTERPRETATION ACT 1960 # http://? - no online source found 1961 # 1962 # * Yukon Daylight Saving Time, YOIC 1987/56 1963 # http://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html 1964 # O.I.C. 1987/056 INTERPRETATION ACT ... 1965 # 1966 # In every year between 1967 # (a) two o'clock in the morning in the first Sunday in April, and 1968 # (b) two o'clock in the morning in the last Sunday in October, 1969 # Standard Time shall be reckoned as seven hours behind Greenwich Time and 1970 # called Yukon Daylight Saving Time. 1971 # ... 1972 # Dated ... 9th day of March, A.D., 1987. 1973 # 1974 # * Yukon Daylight Saving Time 2006, YOIC 2006/127 1975 # http://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html 1976 # O.I.C. 2006/127 INTERPRETATION ACT ... 1977 # 1978 # 1. In Yukon each year the time for general purposes shall be 7 hours 1979 # behind Greenwich mean time during the period commencing at two o'clock 1980 # in the forenoon on the second Sunday of March and ending at two o'clock 1981 # in the forenoon on the first Sunday of November and shall be called 1982 # Yukon Daylight Saving Time. 1983 # 1984 # 2. Order-in-Council 1987/56 is revoked. 1985 # 1986 # 3. This order comes into force January 1, 2007. 1987 # 1988 # * Interpretation Act, RSY 2002, c 125 1989 # http://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html 1990 1991 # From Rives McDow (1999-09-04): 1992 # Nunavut ... moved ... to incorporate the whole territory into one time zone. 1993 # Nunavut moves to single time zone Oct. 31 1994 # http://www.nunatsiaq.com/nunavut/nvt90903_13.html 1995 # 1996 # From Antoine Leca (1999-09-06): 1997 # We then need to create a new timezone for the Kitikmeot region of Nunavut 1998 # to differentiate it from the Yellowknife region. 1999 2000 # From Paul Eggert (1999-09-20): 2001 # Basic Facts: The New Territory 2002 # http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html 2003 # (1999) reports that Pangnirtung operates on eastern time, 2004 # and that Coral Harbour does not observe DST. We don't know when 2005 # Pangnirtung switched to eastern time; we'll guess 1995. 2006 2007 # From Rives McDow (1999-11-08): 2008 # On October 31, when the rest of Nunavut went to Central time, 2009 # Pangnirtung wobbled. Here is the result of their wobble: 2010 # 2011 # The following businesses and organizations in Pangnirtung use Central Time: 2012 # 2013 # First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 2014 # Eastern Arctic National Parks, A & D Specialist 2015 # 2016 # The following businesses and organizations in Pangnirtung use Eastern Time: 2017 # 2018 # Hamlet office, All other businesses, Both schools, Airport operator 2019 # 2020 # This has made for an interesting situation there, which warranted the news. 2021 # No one there that I spoke with seems concerned, or has plans to 2022 # change the local methods of keeping time, as it evidently does not 2023 # really interfere with any activities or make things difficult locally. 2024 # They plan to celebrate New Year's turn-over twice, one hour apart, 2025 # so it appears that the situation will last at least that long. 2026 # The Nunavut Intergovernmental Affairs hopes that they will "come to 2027 # their senses", but the locals evidently don't see any problem with 2028 # the current state of affairs. 2029 2030 # From Michaela Rodrigue, writing in the 2031 # Nunatsiaq News (1999-11-19): 2032 # http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html 2033 # Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 2034 # central - or Nunavut time - for government offices, and eastern time 2035 # for municipal offices and schools.... Igloolik [was similar but then] 2036 # made the switch to central time on Saturday, Nov. 6. 2037 2038 # From Paul Eggert (2000-10-02): 2039 # Matthews and Vincent (1998) say the following, but we lack histories 2040 # for these potential new Zones. 2041 # 2042 # The Canadian Forces station at Alert uses Eastern Time while the 2043 # handful of residents at the Eureka weather station [in the Central 2044 # zone] skip daylight savings. Baffin Island, which is crossed by the 2045 # Central, Eastern and Atlantic Time zones only uses Eastern Time. 2046 # Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 2047 # Central Time and Southampton Island [in the Central zone] is not 2048 # required to use daylight savings. 2049 2050 # From <http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html> 2051 # Nunavut now has two time zones (2000-11-10): 2052 # The Nunavut government would allow its employees in Kugluktuk and 2053 # Cambridge Bay to operate on central time year-round, putting them 2054 # one hour behind the rest of Nunavut for six months during the winter. 2055 # At the end of October the two communities had rebelled against 2056 # Nunavut's unified time zone, refusing to shift to eastern time with 2057 # the rest of the territory for the winter. Cambridge Bay remained on 2058 # central time, while Kugluktuk, even farther west, reverted to 2059 # mountain time, which they had used before the advent of Nunavut's 2060 # unified time zone in 1999. 2061 # 2062 # From Rives McDow (2001-01-20), quoting the Nunavut government: 2063 # The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 2064 2065 # From Paul Eggert (2000-12-04): 2066 # Let's just keep track of the official times for now. 2067 2068 # From Rives McDow (2001-03-07): 2069 # The premier of Nunavut has issued a ministerial statement advising 2070 # that effective 2001-04-01, the territory of Nunavut will revert 2071 # back to three time zones (mountain, central, and eastern). Of the 2072 # cities in Nunavut, Coral Harbor is the only one that I know of that 2073 # has said it will not observe dst, staying on EST year round. I'm 2074 # checking for more info, and will get back to you if I come up with 2075 # more. 2076 # [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 2077 2078 # From Gwillim Law (2005-05-21): 2079 # According to ... 2080 # http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 2081 # (from a 1998 Canadian Geographic article), the de facto and de jure time 2082 # for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 2083 # round. Using Google, it's easy to find other websites that confirm this. 2084 # I wasn't able to find how far back this time regimen goes, but since it 2085 # predates the creation of Nunavut, it probably goes back many years.... 2086 # The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 2087 # 2088 # From Paul Eggert (2014-10-17): 2089 # For lack of better information, assume that Southampton Island observed 2090 # daylight saving only during wartime. Gwillim Law's email also 2091 # mentioned maps now maintained by National Research Council Canada; 2092 # see above for an up-to-date link. 2093 2094 # From Chris Walton (2007-03-01): 2095 # ... the community of Resolute (located on Cornwallis Island in 2096 # Nunavut) moved from Central Time to Eastern Time last November. 2097 # Basically the community did not change its clocks at the end of 2098 # daylight saving.... 2099 # http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 2100 2101 # From Chris Walton (2011-03-21): 2102 # Back in 2007 I initiated the creation of a new "zone file" for Resolute 2103 # Bay. Resolute Bay is a small community located about 900km north of 2104 # the Arctic Circle. The zone file was required because Resolute Bay had 2105 # decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007. 2106 # 2107 # According to new information which I received last week, Resolute Bay 2108 # went back to using UTC-6 in the winter of 2007-2008... 2109 # 2110 # On March 11/2007 most of Canada went onto daylight saving. On March 2111 # 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I 2112 # talked to somebody that was both knowledgeable and helpful. I was able 2113 # to confirm that Resolute Bay was still operating on UTC-5. It was 2114 # explained to me that Resolute Bay had been on the Eastern Time zone 2115 # (EST) in the winter, and was now back on the Central Time zone (CDT). 2116 # i.e. the time zone had changed twice in the last year but the clocks 2117 # had not moved. The residents had to know which time zone they were in 2118 # so they could follow the correct TV schedule... 2119 # 2120 # On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I 2121 # phoned the Resolute Bay hamlet office...[D]ue to the challenging nature 2122 # of the phone call, I decided to seek out an alternate source of 2123 # information. I found an e-mail address for somebody by the name of 2124 # Stephanie Adams whose job was listed as "Inns North Support Officer for 2125 # Arctic Co-operatives." I was under the impression that Stephanie lived 2126 # and worked in Resolute Bay... 2127 # 2128 # On March 14/2011 I phoned the hamlet office again. I was told that 2129 # Resolute Bay had been using Central Standard Time over the winter of 2130 # 2010-2011 and that the clocks had therefore been moved one hour ahead 2131 # on March 13/2011. The person I talked to was aware that Resolute Bay 2132 # had previously experimented with Eastern Standard Time but he could not 2133 # tell me when the practice had stopped. 2134 # 2135 # On March 17/2011 I searched the Web to find an e-mail address of 2136 # somebody that might be able to tell me exactly when Resolute Bay went 2137 # off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz 2138 # used to be the mayor of Resolute Bay and he apparently owns half the 2139 # businesses including "South Camp Inn." This website has some info on 2140 # Aziz: 2141 # http://www.uphere.ca/node/493 2142 # 2143 # I sent Aziz an e-mail asking when Resolute Bay had stopped using 2144 # Eastern Standard Time. 2145 # 2146 # Aziz responded quickly with this: "hi, The time was not changed for the 2147 # 1 year only, the following year, the community went back to the old way 2148 # of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in 2149 # the winter Zulu plus 6 hrs" 2150 # 2151 # This of course conflicted with everything I had ascertained in November 2008. 2152 # 2153 # I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz 2154 # responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You 2155 # may want to check with the weather office in Resolute Bay or do a 2156 # search on the weather through Env. Canada. web site" 2157 # 2158 # If I had realized the Stephanie did not live in Resolute Bay I would 2159 # never have contacted her. I now believe that all the information I 2160 # obtained in November 2008 should be ignored... 2161 # I apologize for reporting incorrect information in 2008. 2162 2163 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2164 Rule NT_YK 1918 only - Apr 14 2:00 1:00 D 2165 Rule NT_YK 1918 only - Oct 27 2:00 0 S 2166 Rule NT_YK 1919 only - May 25 2:00 1:00 D 2167 Rule NT_YK 1919 only - Nov 1 0:00 0 S 2168 Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 2169 Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 2170 Rule NT_YK 1945 only - Sep 30 2:00 0 S 2171 Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 2172 Rule NT_YK 1965 only - Oct lastSun 2:00 0 S 2173 Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 2174 Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 2175 Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 2176 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2177 # aka Panniqtuuq 2178 Zone America/Pangnirtung 0 - zzz 1921 # trading post est. 2179 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 2180 -5:00 Canada E%sT 1999 Oct 31 2:00 2181 -6:00 Canada C%sT 2000 Oct 29 2:00 2182 -5:00 Canada E%sT 2183 # formerly Frobisher Bay 2184 Zone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est. 2185 -5:00 NT_YK E%sT 1999 Oct 31 2:00 2186 -6:00 Canada C%sT 2000 Oct 29 2:00 2187 -5:00 Canada E%sT 2188 # aka Qausuittuq 2189 Zone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded 2190 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2191 -5:00 - EST 2001 Apr 1 3:00 2192 -6:00 Canada C%sT 2006 Oct 29 2:00 2193 -5:00 - EST 2007 Mar 11 3:00 2194 -6:00 Canada C%sT 2195 # aka Kangiqiniq 2196 Zone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded 2197 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2198 -5:00 - EST 2001 Apr 1 3:00 2199 -6:00 Canada C%sT 2200 # aka Iqaluktuuttiaq 2201 Zone America/Cambridge_Bay 0 - zzz 1920 # trading post est.? 2202 -7:00 NT_YK M%sT 1999 Oct 31 2:00 2203 -6:00 Canada C%sT 2000 Oct 29 2:00 2204 -5:00 - EST 2000 Nov 5 0:00 2205 -6:00 - CST 2001 Apr 1 3:00 2206 -7:00 Canada M%sT 2207 Zone America/Yellowknife 0 - zzz 1935 # Yellowknife founded? 2208 -7:00 NT_YK M%sT 1980 2209 -7:00 Canada M%sT 2210 Zone America/Inuvik 0 - zzz 1953 # Inuvik founded 2211 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 2212 -7:00 NT_YK M%sT 1980 2213 -7:00 Canada M%sT 2214 Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 2215 -9:00 NT_YK Y%sT 1967 May 28 0:00 2216 -8:00 NT_YK P%sT 1980 2217 -8:00 Canada P%sT 2218 Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 2219 -9:00 NT_YK Y%sT 1973 Oct 28 0:00 2220 -8:00 NT_YK P%sT 1980 2221 -8:00 Canada P%sT 2222 2223 2224 ############################################################################### 2225 2226 # Mexico 2227 2228 # From Paul Eggert (2014-12-07): 2229 # The Investigation and Analysis Service of the 2230 # Mexican Library of Congress (MLoC) has published a 2231 # history of Mexican local time (in Spanish) 2232 # http://www.diputados.gob.mx/bibliot/publica/inveyana/polisoc/horver/index.htm 2233 # 2234 # Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 2235 # (In all cases we go with the MLoC.) 2236 # S&P report that Baja was at -8:00 in 1922/1923. 2237 # S&P say the 1930 transition in Baja was 1930-11-16. 2238 # S&P report no DST during summer 1931. 2239 # S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 2240 2241 # From Gwillim Law (2001-02-20): 2242 # There are some other discrepancies between the Decrees page and the 2243 # tz database. I think they can best be explained by supposing that 2244 # the researchers who prepared the Decrees page failed to find some of 2245 # the relevant documents. 2246 2247 # From Alan Perry (1996-02-15): 2248 # A guy from our Mexico subsidiary finally found the Presidential Decree 2249 # outlining the timezone changes in Mexico. 2250 # 2251 # ------------- Begin Forwarded Message ------------- 2252 # 2253 # I finally got my hands on the Official Presidential Decree that sets up the 2254 # rules for the DST changes. The rules are: 2255 # 2256 # 1. The country is divided in 3 timezones: 2257 # - Baja California Norte (the Mexico/BajaNorte TZ) 2258 # - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 2259 # - The rest of the country (the Mexico/General TZ) 2260 # 2261 # 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 2262 # at 2:00 AM, the times in each zone are as follows: 2263 # BajaNorte: GMT+7 2264 # BajaSur: GMT+6 2265 # General: GMT+5 2266 # 2267 # 3. The rest of the year, the times are as follows: 2268 # BajaNorte: GMT+8 2269 # BajaSur: GMT+7 2270 # General: GMT+6 2271 # 2272 # The Decree was published in Mexico's Official Newspaper on January 4th. 2273 # 2274 # -------------- End Forwarded Message -------------- 2275 # From Paul Eggert (1996-06-12): 2276 # For an English translation of the decree, see 2277 # "Diario Oficial: Time Zone Changeover" (1996-01-04). 2278 # http://mexico-travel.com/extra/timezone_eng.html 2279 2280 # From Rives McDow (1998-10-08): 2281 # The State of Quintana Roo has reverted back to central STD and DST times 2282 # (i.e. UTC -0600 and -0500 as of 1998-08-02). 2283 2284 # From Rives McDow (2000-01-10): 2285 # Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 2286 # zone 5 hours from the International Date Line, and will not observe daylight 2287 # savings time so as to stay on the same time zone as the southern part of 2288 # Arizona year round. 2289 2290 # From Jesper Nørgaard, translating 2291 # <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 2292 # In Oaxaca, the 55.000 teachers from the Section 22 of the National 2293 # Syndicate of Education Workers, refuse to apply daylight saving each 2294 # year, so that the more than 10,000 schools work at normal hour the 2295 # whole year. 2296 2297 # From Gwillim Law (2001-01-19): 2298 # <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 2299 # (translated):... 2300 # January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 2301 # that Summer Time will be reduced from seven to five months, starting 2302 # this year.... 2303 # http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001 2304 # [translated], says "summer time will ... take effect on the first Sunday 2305 # in May, and end on the last Sunday of September. 2306 2307 # From Arthur David Olson (2001-01-25): 2308 # The 2001-01-24 traditional Washington Post contained the page one 2309 # story "Timely Issue Divides Mexicans."... 2310 # http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 2311 # ... Mexico City Mayor López Obrador "...is threatening to keep 2312 # Mexico City and its 20 million residents on a different time than 2313 # the rest of the country..." In particular, López Obrador would abolish 2314 # observation of Daylight Saving Time. 2315 2316 # Official statute published by the Energy Department 2317 # http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre 2318 # (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 2319 # and Sonora with no DST. This was reported by Jesper Nørgaard (2001-02-03). 2320 2321 # From Paul Eggert (2001-03-03): 2322 # 2323 # http://www.latimes.com/news/nation/20010303/t000018766.html 2324 # James F. Smith writes in today's LA Times 2325 # * Sonora will continue to observe standard time. 2326 # * Last week Mexico City's mayor Andrés Manuel López Obrador decreed that 2327 # the Federal District will not adopt DST. 2328 # * 4 of 16 district leaders announced they'll ignore the decree. 2329 # * The decree does not affect federal-controlled facilities including 2330 # the airport, banks, hospitals, and schools. 2331 # 2332 # For now we'll assume that the Federal District will bow to federal rules. 2333 2334 # From Jesper Nørgaard (2001-04-01): 2335 # I found some references to the Mexican application of daylight 2336 # saving, which modifies what I had already sent you, stating earlier 2337 # that a number of northern Mexican states would go on daylight 2338 # saving. The modification reverts this to only cover Baja California 2339 # (Norte), while all other states (except Sonora, who has no daylight 2340 # saving all year) will follow the original decree of president 2341 # Vicente Fox, starting daylight saving May 6, 2001 and ending 2342 # September 30, 2001. 2343 # References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp> 2344 # Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 2345 2346 # From Reuters (2001-09-04): 2347 # Mexico's Supreme Court on Tuesday declared that daylight savings was 2348 # unconstitutional in Mexico City, creating the possibility the 2349 # capital will be in a different time zone from the rest of the nation 2350 # next year.... The Supreme Court's ruling takes effect at 2:00 2351 # a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 2352 # standard time. "This is so residents of the Federal District are not 2353 # subject to unexpected time changes," a statement from the court said. 2354 2355 # From Jesper Nørgaard Welen (2002-03-12): 2356 # ... consulting my local grocery store(!) and my coworkers, they all insisted 2357 # that a new decision had been made to reinstate US style DST in Mexico.... 2358 # http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 2359 # confirms this. Sonora as usual is the only state where DST is not applied. 2360 2361 # From Steffen Thorsen (2009-12-28): 2362 # 2363 # Steffen Thorsen wrote: 2364 # > Mexico's House of Representatives has approved a proposal for northern 2365 # > Mexico's border cities to share the same daylight saving schedule as 2366 # > the United States. 2367 # Now this has passed both the Congress and the Senate, so starting from 2368 # 2010, some border regions will be the same: 2369 # http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ 2370 # http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 2371 # (Spanish) 2372 # 2373 # Could not find the new law text, but the proposed law text changes are here: 2374 # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf 2375 # (Gaceta Parlamentaria) 2376 # 2377 # There is also a list of the votes here: 2378 # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html 2379 # 2380 # Our page: 2381 # http://www.timeanddate.com/news/time/north-mexico-dst-change.html 2382 2383 # From Arthur David Olson (2010-01-20): 2384 # The page 2385 # http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2386 # includes this text: 2387 # En los municipios fronterizos de Tijuana y Mexicali en Baja California; 2388 # Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila; 2389 # Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en 2390 # Tamaulipas, la aplicación de este horario estacional surtirá efecto 2391 # desde las dos horas del segundo domingo de marzo y concluirá a las dos 2392 # horas del primer domingo de noviembre. 2393 # En los municipios fronterizos que se encuentren ubicados en la franja 2394 # fronteriza norte en el territorio comprendido entre la línea 2395 # internacional y la línea paralela ubicada a una distancia de veinte 2396 # kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el 2397 # interior del país, la aplicación de este horario estacional surtirá 2398 # efecto desde las dos horas del segundo domingo de marzo y concluirá a 2399 # las dos horas del primer domingo de noviembre. 2400 2401 # From Steffen Thorsen (2014-12-08), translated by Gwillim Law: 2402 # The Mexican state of Quintana Roo will likely change to EST in 2015. 2403 # 2404 # http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo 2405 # "With this change, the time conflict that has existed between the municipios 2406 # of Quintana Roo and the municipio of Felipe Carrillo Puerto may come to an 2407 # end. The latter declared itself in rebellion 15 years ago when a time change 2408 # was initiated in Mexico, and since then it has refused to change its time 2409 # zone along with the rest of the country." 2410 # 2411 # From Steffen Thorsen (2015-01-14), translated by Gwillim Law: 2412 # http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html 2413 # "...the new time zone will come into effect at two o'clock on the first Sunday 2414 # of February, when we will have to advance the clock one hour from its current 2415 # time..." 2416 # Also, the new zone will not use DST. 2417 # 2418 # From Carlos Raúl Perasso (2015-02-02): 2419 # The decree that modifies the Mexican Hour System Law has finally 2420 # been published at the Diario Oficial de la Federación 2421 # http://www.dof.gob.mx/nota_detalle.php?codigo=5380123&fecha=31/01/2015 2422 # It establishes 5 zones for Mexico: 2423 # 1- Zona Centro (Central Zone): Corresponds to longitude 90 W, 2424 # includes most of Mexico, excluding what's mentioned below. 2425 # 2- Zona Pacífico (Pacific Zone): Longitude 105 W, includes the 2426 # states of Baja California Sur; Chihuahua; Nayarit (excluding Bahía 2427 # de Banderas which lies in Central Zone); Sinaloa and Sonora. 2428 # 3- Zona Noroeste (Northwest Zone): Longitude 120 W, includes the 2429 # state of Baja California. 2430 # 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state 2431 # of Quintana Roo. 2432 # 5- The islands, reefs and keys shall take their timezone from the 2433 # longitude they are located at. 2434 2435 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2436 Rule Mexico 1939 only - Feb 5 0:00 1:00 D 2437 Rule Mexico 1939 only - Jun 25 0:00 0 S 2438 Rule Mexico 1940 only - Dec 9 0:00 1:00 D 2439 Rule Mexico 1941 only - Apr 1 0:00 0 S 2440 Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War 2441 Rule Mexico 1944 only - May 1 0:00 0 S 2442 Rule Mexico 1950 only - Feb 12 0:00 1:00 D 2443 Rule Mexico 1950 only - Jul 30 0:00 0 S 2444 Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 2445 Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S 2446 Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D 2447 Rule Mexico 2001 only - Sep lastSun 2:00 0 S 2448 Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 2449 Rule Mexico 2002 max - Oct lastSun 2:00 0 S 2450 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2451 # Quintana Roo; represented by Cancún 2452 Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 2453 -6:00 - CST 1981 Dec 23 2454 -5:00 Mexico E%sT 1998 Aug 2 2:00 2455 -6:00 Mexico C%sT 2015 Feb 1 2:00 2456 -5:00 - EST 2457 # Campeche, Yucatán; represented by Mérida 2458 Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 2459 -6:00 - CST 1981 Dec 23 2460 -5:00 - EST 1982 Dec 2 2461 -6:00 Mexico C%sT 2462 # Coahuila, Durango, Nuevo León, Tamaulipas (near US border) 2463 Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 2464 -6:00 - CST 1988 2465 -6:00 US C%sT 1989 2466 -6:00 Mexico C%sT 2010 2467 -6:00 US C%sT 2468 # Coahuila, Durango, Nuevo León, Tamaulipas (away from US border) 2469 Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 2470 -6:00 - CST 1988 2471 -6:00 US C%sT 1989 2472 -6:00 Mexico C%sT 2473 # Central Mexico 2474 Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 2475 -7:00 - MST 1927 Jun 10 23:00 2476 -6:00 - CST 1930 Nov 15 2477 -7:00 - MST 1931 May 1 23:00 2478 -6:00 - CST 1931 Oct 2479 -7:00 - MST 1932 Apr 1 2480 -6:00 Mexico C%sT 2001 Sep 30 2:00 2481 -6:00 - CST 2002 Feb 20 2482 -6:00 Mexico C%sT 2483 # Chihuahua (near US border) 2484 Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 2485 -7:00 - MST 1927 Jun 10 23:00 2486 -6:00 - CST 1930 Nov 15 2487 -7:00 - MST 1931 May 1 23:00 2488 -6:00 - CST 1931 Oct 2489 -7:00 - MST 1932 Apr 1 2490 -6:00 - CST 1996 2491 -6:00 Mexico C%sT 1998 2492 -6:00 - CST 1998 Apr Sun>=1 3:00 2493 -7:00 Mexico M%sT 2010 2494 -7:00 US M%sT 2495 # Chihuahua (away from US border) 2496 Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 2497 -7:00 - MST 1927 Jun 10 23:00 2498 -6:00 - CST 1930 Nov 15 2499 -7:00 - MST 1931 May 1 23:00 2500 -6:00 - CST 1931 Oct 2501 -7:00 - MST 1932 Apr 1 2502 -6:00 - CST 1996 2503 -6:00 Mexico C%sT 1998 2504 -6:00 - CST 1998 Apr Sun>=1 3:00 2505 -7:00 Mexico M%sT 2506 # Sonora 2507 Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 2508 -7:00 - MST 1927 Jun 10 23:00 2509 -6:00 - CST 1930 Nov 15 2510 -7:00 - MST 1931 May 1 23:00 2511 -6:00 - CST 1931 Oct 2512 -7:00 - MST 1932 Apr 1 2513 -6:00 - CST 1942 Apr 24 2514 -7:00 - MST 1949 Jan 14 2515 -8:00 - PST 1970 2516 -7:00 Mexico M%sT 1999 2517 -7:00 - MST 2518 2519 # From Alexander Krivenyshev (2010-04-21): 2520 # According to news, Bahía de Banderas (Mexican state of Nayarit) 2521 # changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to 2522 # share the same time zone as nearby city Puerto Vallarta, Jalisco). 2523 # 2524 # (Spanish) 2525 # Bahía de Banderas homologa su horario al del centro del 2526 # país, a partir de este domingo 2527 # http://www.nayarit.gob.mx/notes.asp?id=20748 2528 # 2529 # Bahía de Banderas homologa su horario con el del Centro del 2530 # País 2531 # 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 2532 # 2533 # (English) 2534 # Puerto Vallarta and Bahía de Banderas: One Time Zone 2535 # http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml 2536 # http://www.worldtimezone.com/dst_news/dst_news_mexico08.html 2537 # 2538 # "Mexico's Senate approved the amendments to the Mexican Schedule System that 2539 # will allow Bahía de Banderas and Puerto Vallarta to share the same time 2540 # zone ..." 2541 # Baja California Sur, Nayarit, Sinaloa 2542 2543 # From Arthur David Olson (2010-05-01): 2544 # Use "Bahia_Banderas" to keep the name to fourteen characters. 2545 2546 # Mazatlán 2547 Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 2548 -7:00 - MST 1927 Jun 10 23:00 2549 -6:00 - CST 1930 Nov 15 2550 -7:00 - MST 1931 May 1 23:00 2551 -6:00 - CST 1931 Oct 2552 -7:00 - MST 1932 Apr 1 2553 -6:00 - CST 1942 Apr 24 2554 -7:00 - MST 1949 Jan 14 2555 -8:00 - PST 1970 2556 -7:00 Mexico M%sT 2557 2558 # Bahía de Banderas 2559 Zone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 2560 -7:00 - MST 1927 Jun 10 23:00 2561 -6:00 - CST 1930 Nov 15 2562 -7:00 - MST 1931 May 1 23:00 2563 -6:00 - CST 1931 Oct 2564 -7:00 - MST 1932 Apr 1 2565 -6:00 - CST 1942 Apr 24 2566 -7:00 - MST 1949 Jan 14 2567 -8:00 - PST 1970 2568 -7:00 Mexico M%sT 2010 Apr 4 2:00 2569 -6:00 Mexico C%sT 2570 2571 # Baja California (near US border) 2572 Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 2573 -7:00 - MST 1924 2574 -8:00 - PST 1927 Jun 10 23:00 2575 -7:00 - MST 1930 Nov 15 2576 -8:00 - PST 1931 Apr 1 2577 -8:00 1:00 PDT 1931 Sep 30 2578 -8:00 - PST 1942 Apr 24 2579 -8:00 1:00 PWT 1945 Aug 14 23:00u 2580 -8:00 1:00 PPT 1945 Nov 12 # Peace 2581 -8:00 - PST 1948 Apr 5 2582 -8:00 1:00 PDT 1949 Jan 14 2583 -8:00 - PST 1954 2584 -8:00 CA P%sT 1961 2585 -8:00 - PST 1976 2586 -8:00 US P%sT 1996 2587 -8:00 Mexico P%sT 2001 2588 -8:00 US P%sT 2002 Feb 20 2589 -8:00 Mexico P%sT 2010 2590 -8:00 US P%sT 2591 # Baja California (away from US border) 2592 Zone America/Santa_Isabel -7:39:28 - LMT 1922 Jan 1 0:20:32 2593 -7:00 - MST 1924 2594 -8:00 - PST 1927 Jun 10 23:00 2595 -7:00 - MST 1930 Nov 15 2596 -8:00 - PST 1931 Apr 1 2597 -8:00 1:00 PDT 1931 Sep 30 2598 -8:00 - PST 1942 Apr 24 2599 -8:00 1:00 PWT 1945 Aug 14 23:00u 2600 -8:00 1:00 PPT 1945 Nov 12 # Peace 2601 -8:00 - PST 1948 Apr 5 2602 -8:00 1:00 PDT 1949 Jan 14 2603 -8:00 - PST 1954 2604 -8:00 CA P%sT 1961 2605 -8:00 - PST 1976 2606 -8:00 US P%sT 1996 2607 -8:00 Mexico P%sT 2001 2608 -8:00 US P%sT 2002 Feb 20 2609 -8:00 Mexico P%sT 2610 # From Paul Eggert (2006-03-22): 2611 # Formerly there was an America/Ensenada zone, which differed from 2612 # America/Tijuana only in that it did not observe DST from 1976 2613 # through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2614 # Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 2615 # that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and 2616 # Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 2617 # DST-observance was a town-by-town matter back then. This concerns 2618 # data after 1970 so most likely there should be at least one Zone 2619 # other than America/Tijuana for Baja, but it's not clear yet what its 2620 # name or contents should be. 2621 # 2622 # Revillagigedo Is 2623 # no information 2624 2625 ############################################################################### 2626 2627 # Anguilla 2628 # Antigua and Barbuda 2629 # See America/Port_of_Spain. 2630 2631 # Bahamas 2632 # 2633 # For 1899 Milne gives -5:09:29.5; round that. 2634 # 2635 # From Sue Williams (2006-12-07): 2636 # The Bahamas announced about a month ago that they plan to change their DST 2637 # rules to sync with the U.S. starting in 2007.... 2638 # http://www.jonesbahamas.com/?c=45&a=10412 2639 2640 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2641 Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S 2642 Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D 2643 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2644 Zone America/Nassau -5:09:30 - LMT 1912 Mar 2 2645 -5:00 Bahamas E%sT 1976 2646 -5:00 US E%sT 2647 2648 # Barbados 2649 2650 # For 1899 Milne gives -3:58:29.2; round that. 2651 2652 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2653 Rule Barb 1977 only - Jun 12 2:00 1:00 D 2654 Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 2655 Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 2656 Rule Barb 1979 only - Sep 30 2:00 0 S 2657 Rule Barb 1980 only - Sep 25 2:00 0 S 2658 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2659 Zone America/Barbados -3:58:29 - LMT 1924 # Bridgetown 2660 -3:58:29 - BMT 1932 # Bridgetown Mean Time 2661 -4:00 Barb A%sT 2662 2663 # Belize 2664 # Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. 2665 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2666 Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 2667 Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 2668 Rule Belize 1973 only - Dec 5 0:00 1:00 D 2669 Rule Belize 1974 only - Feb 9 0:00 0 S 2670 Rule Belize 1982 only - Dec 18 0:00 1:00 D 2671 Rule Belize 1983 only - Feb 12 0:00 0 S 2672 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2673 Zone America/Belize -5:52:48 - LMT 1912 Apr 2674 -6:00 Belize C%sT 2675 2676 # Bermuda 2677 2678 # For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower, 2679 # Bermuda dockyard, Ireland I; round that. 2680 2681 # From Dan Jones, reporting in The Royal Gazette (2006-06-26): 2682 2683 # Next year, however, clocks in the US will go forward on the second Sunday 2684 # in March, until the first Sunday in November. And, after the Time Zone 2685 # (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 2686 # Friday, the same thing will happen in Bermuda. 2687 # http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 2688 2689 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2690 Zone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton 2691 -4:00 - AST 1974 Apr 28 2:00 2692 -4:00 Canada A%sT 1976 2693 -4:00 US A%sT 2694 2695 # Cayman Is 2696 2697 # From Paul Eggert (2015-05-15): 2698 # The Cayman government has decided to introduce DST in 2016, the idea being 2699 # to keep in sync with New York. The legislation hasn't passed but the change 2700 # seems quite likely. See: Meade B. Cayman 27. 2701 # http://www.cayman27.com.ky/2015/05/15/clock-ticks-toward-daylight-saving-time-in-cayman 2702 2703 Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown 2704 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 2705 -5:00 - EST 2016 2706 -5:00 US E%sT 2707 2708 # Costa Rica 2709 2710 # Milne gives -5:36:13.3 as San José mean time; round to nearest. 2711 2712 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2713 Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D 2714 Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S 2715 Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 2716 # IATA SSIM (1991-09) says the following was at 1:00; 2717 # go with Shanks & Pottenger. 2718 Rule CR 1991 only - Jul 1 0:00 0 S 2719 Rule CR 1992 only - Mar 15 0:00 0 S 2720 # There are too many San Josés elsewhere, so we'll use 'Costa Rica'. 2721 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2722 Zone America/Costa_Rica -5:36:13 - LMT 1890 # San José 2723 -5:36:13 - SJMT 1921 Jan 15 # San José Mean Time 2724 -6:00 CR C%sT 2725 # Coco 2726 # no information; probably like America/Costa_Rica 2727 2728 # Cuba 2729 2730 # From Paul Eggert (2013-02-21): 2731 # Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57 2732 # for the port, and -5:30 for meteorological observations. 2733 # For now, stick with Shanks & Pottenger. 2734 2735 # From Arthur David Olson (1999-03-29): 2736 # The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 2737 # the Cuban National Team and the Baltimore Orioles was carried live on 2738 # the Orioles Radio Network, including affiliate WTOP in Washington, DC. 2739 # During the game, play-by-play announcer Jim Hunter noted that 2740 # "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 2741 # Time today." (The "two hour" remark referred to losing one hour of 2742 # sleep on 1999-03-28 - when the announcers were in Cuba as it switched 2743 # to DST - and one more hour on 1999-04-04 - when the announcers will have 2744 # returned to Baltimore, which switches on that date.) 2745 2746 # From Steffen Thorsen (2013-11-11): 2747 # DST start in Cuba in 2004 ... does not follow the same rules as the 2748 # years before. The correct date should be Sunday 2004-03-28 00:00 ... 2749 # https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html 2750 2751 # From Evert van der Veer via Steffen Thorsen (2004-10-28): 2752 # Cuba is not going back to standard time this year. 2753 # From Paul Eggert (2006-03-22): 2754 # http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 2755 # says that it's due to a problem at the Antonio Guiteras 2756 # thermoelectric plant, and says "This October there will be no return 2757 # to normal hours (after daylight saving time)". 2758 # For now, let's assume that it's a temporary measure. 2759 2760 # From Carlos A. Carnero Delgado (2005-11-12): 2761 # This year (just like in 2004-2005) there's no change in time zone 2762 # adjustment in Cuba. We will stay in daylight saving time: 2763 # http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 2764 2765 # From Jesper Nørgaard Welen (2006-10-21): 2766 # An article in GRANMA INTERNACIONAL claims that Cuba will end 2767 # the 3 years of permanent DST next weekend, see 2768 # http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 2769 # "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 2770 # watches should be set back one hour - going back to 00:00 hours - returning 2771 # to the normal schedule.... 2772 2773 # From Paul Eggert (2007-03-02): 2774 # <http://www.granma.cubaweb.cu/english/news/art89.html>, dated yesterday, 2775 # says Cuban clocks will advance at midnight on March 10. 2776 # For lack of better information, assume Cuba will use US rules, 2777 # except that it switches at midnight standard time as usual. 2778 # 2779 # From Steffen Thorsen (2007-10-25): 2780 # Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week 2781 # earlier - on the last Sunday of October, just like in 2006. 2782 # 2783 # He supplied these references: 2784 # 2785 # http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES 2786 # http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm 2787 # 2788 # From Alex Krivenyshev (2007-10-25): 2789 # Here is also article from Granma (Cuba): 2790 # 2791 # Regirá el Horario Normal desde el próximo domingo 28 de octubre 2792 # http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html 2793 # 2794 # http://www.worldtimezone.com/dst_news/dst_news_cuba03.html 2795 2796 # From Arthur David Olson (2008-03-09): 2797 # I'm in Maryland which is now observing United States Eastern Daylight 2798 # Time. At 9:44 local time I used RealPlayer to listen to 2799 # http://media.enet.cu/radioreloj 2800 # a Cuban information station, and heard 2801 # the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), 2802 # indicating that Cuba is still on standard time. 2803 2804 # From Steffen Thorsen (2008-03-12): 2805 # It seems that Cuba will start DST on Sunday, 2007-03-16... 2806 # It was announced yesterday, according to this source (in Spanish): 2807 # http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm 2808 # 2809 # Some more background information is posted here: 2810 # http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html 2811 # 2812 # The article also says that Cuba has been observing DST since 1963, 2813 # while Shanks (and tzdata) has 1965 as the first date (except in the 2814 # 1940's). Many other web pages in Cuba also claim that it has been 2815 # observed since 1963, but with the exception of 1970 - an exception 2816 # which is not present in tzdata/Shanks. So there is a chance we need to 2817 # change some historic records as well. 2818 # 2819 # One example: 2820 # http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm 2821 2822 # From Jesper Nørgaard Welen (2008-03-13): 2823 # The Cuban time change has just been confirmed on the most authoritative 2824 # web site, the Granma. Please check out 2825 # http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html 2826 # 2827 # Basically as expected after Steffen Thorsen's information, the change 2828 # will take place midnight between Saturday and Sunday. 2829 2830 # From Arthur David Olson (2008-03-12): 2831 # Assume Sun>=15 (third Sunday) going forward. 2832 2833 # From Alexander Krivenyshev (2009-03-04) 2834 # According to the Radio Reloj - Cuba will start Daylight Saving Time on 2835 # midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- 2836 # not on midnight March 14 / March 15 as previously thought. 2837 # 2838 # http://www.worldtimezone.com/dst_news/dst_news_cuba05.html 2839 # (in Spanish) 2840 2841 # From Arthur David Olson (2009-03-09) 2842 # I listened over the Internet to 2843 # http://media.enet.cu/readioreloj 2844 # this morning; when it was 10:05 a. m. here in Bethesda, Maryland the 2845 # the time was announced as "diez cinco" - the same time as here, indicating 2846 # that has indeed switched to DST. Assume second Sunday from 2009 forward. 2847 2848 # From Steffen Thorsen (2011-03-08): 2849 # Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00 2850 # this year. Nothing about the end date known so far (if that has 2851 # changed at all). 2852 # 2853 # Source: 2854 # http://granma.co.cu/2011/03/08/nacional/artic01.html 2855 # 2856 # Our info: 2857 # http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html 2858 # 2859 # From Steffen Thorsen (2011-10-30) 2860 # Cuba will end DST two weeks later this year. Instead of going back 2861 # tonight, it has been delayed to 2011-11-13 at 01:00. 2862 # 2863 # One source (Spanish) 2864 # http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html 2865 # 2866 # Our page: 2867 # http://www.timeanddate.com/news/time/cuba-time-changes-2011.html 2868 # 2869 # From Steffen Thorsen (2012-03-01) 2870 # According to Radio Reloj, Cuba will start DST on Midnight between March 2871 # 31 and April 1. 2872 # 2873 # Radio Reloj has the following info (Spanish): 2874 # http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril 2875 # 2876 # Our info on it: 2877 # http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html 2878 2879 # From Steffen Thorsen (2012-11-03): 2880 # Radio Reloj and many other sources report that Cuba is changing back 2881 # to standard time on 2012-11-04: 2882 # http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre 2883 # From Paul Eggert (2012-11-03): 2884 # For now, assume the future rule is first Sunday in November. 2885 2886 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2887 Rule Cuba 1928 only - Jun 10 0:00 1:00 D 2888 Rule Cuba 1928 only - Oct 10 0:00 0 S 2889 Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 2890 Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 2891 Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 2892 Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 2893 Rule Cuba 1965 only - Jun 1 0:00 1:00 D 2894 Rule Cuba 1965 only - Sep 30 0:00 0 S 2895 Rule Cuba 1966 only - May 29 0:00 1:00 D 2896 Rule Cuba 1966 only - Oct 2 0:00 0 S 2897 Rule Cuba 1967 only - Apr 8 0:00 1:00 D 2898 Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 2899 Rule Cuba 1968 only - Apr 14 0:00 1:00 D 2900 Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 2901 Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S 2902 Rule Cuba 1972 1974 - Oct 8 0:00 0 S 2903 Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S 2904 Rule Cuba 1978 only - May 7 0:00 1:00 D 2905 Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 2906 Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 2907 Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 2908 Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 2909 Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 2910 Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 2911 Rule Cuba 1996 only - Oct 6 0:00s 0 S 2912 Rule Cuba 1997 only - Oct 12 0:00s 0 S 2913 Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 2914 Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 2915 Rule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D 2916 Rule Cuba 2004 only - Mar lastSun 0:00s 1:00 D 2917 Rule Cuba 2006 2010 - Oct lastSun 0:00s 0 S 2918 Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D 2919 Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D 2920 Rule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D 2921 Rule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D 2922 Rule Cuba 2011 only - Nov 13 0:00s 0 S 2923 Rule Cuba 2012 only - Apr 1 0:00s 1:00 D 2924 Rule Cuba 2012 max - Nov Sun>=1 0:00s 0 S 2925 Rule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D 2926 2927 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2928 Zone America/Havana -5:29:28 - LMT 1890 2929 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 2930 -5:00 Cuba C%sT 2931 2932 # Dominica 2933 # See America/Port_of_Spain. 2934 2935 # Dominican Republic 2936 2937 # From Steffen Thorsen (2000-10-30): 2938 # Enrique Morales reported to me that the Dominican Republic has changed the 2939 # time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 2940 # http://www.listin.com.do/antes/261000/republica/princi.html 2941 2942 # From Paul Eggert (2000-12-04): 2943 # That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 2944 2945 # From Rives McDow (2000-12-01): 2946 # Dominican Republic changed its mind and presidential decree on Tuesday, 2947 # November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 2948 # Dominican Republic will be reverting to 8 hours from the International Date 2949 # Line, and will not be using DST in the foreseeable future. The reason they 2950 # decided to use DST was to be in synch with Puerto Rico, who was also going 2951 # to implement DST. When Puerto Rico didn't implement DST, the president 2952 # decided to revert. 2953 2954 2955 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2956 Rule DR 1966 only - Oct 30 0:00 1:00 D 2957 Rule DR 1967 only - Feb 28 0:00 0 S 2958 Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 2959 Rule DR 1970 only - Feb 21 0:00 0 S 2960 Rule DR 1971 only - Jan 20 0:00 0 S 2961 Rule DR 1972 1974 - Jan 21 0:00 0 S 2962 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2963 Zone America/Santo_Domingo -4:39:36 - LMT 1890 2964 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 2965 -5:00 DR E%sT 1974 Oct 27 2966 -4:00 - AST 2000 Oct 29 2:00 2967 -5:00 US E%sT 2000 Dec 3 1:00 2968 -4:00 - AST 2969 2970 # El Salvador 2971 2972 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2973 Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 2974 Rule Salv 1987 1988 - Sep lastSun 0:00 0 S 2975 # There are too many San Salvadors elsewhere, so use America/El_Salvador 2976 # instead of America/San_Salvador. 2977 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2978 Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 2979 -6:00 Salv C%sT 2980 2981 # Grenada 2982 # Guadeloupe 2983 # St Barthélemy 2984 # St Martin (French part) 2985 # See America/Port_of_Spain. 2986 2987 # Guatemala 2988 # 2989 # From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 2990 # Diario Co Latino, at 2991 # <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>, 2992 # says in an article dated 2006-04-19 that the Guatemalan government had 2993 # decided on that date to advance official time by 60 minutes, to lessen the 2994 # impact of the elevated cost of oil.... Daylight saving time will last from 2995 # 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 2996 # From Paul Eggert (2006-06-22): 2997 # The Ministry of Energy and Mines, press release CP-15/2006 2998 # (2006-04-19), says DST ends at 24:00. See 2999 # http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf 3000 3001 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3002 Rule Guat 1973 only - Nov 25 0:00 1:00 D 3003 Rule Guat 1974 only - Feb 24 0:00 0 S 3004 Rule Guat 1983 only - May 21 0:00 1:00 D 3005 Rule Guat 1983 only - Sep 22 0:00 0 S 3006 Rule Guat 1991 only - Mar 23 0:00 1:00 D 3007 Rule Guat 1991 only - Sep 7 0:00 0 S 3008 Rule Guat 2006 only - Apr 30 0:00 1:00 D 3009 Rule Guat 2006 only - Oct 1 0:00 0 S 3010 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3011 Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5 3012 -6:00 Guat C%sT 3013 3014 # Haiti 3015 # From Gwillim Law (2005-04-15): 3016 # Risto O. Nykänen wrote me that Haiti is now on DST. 3017 # I searched for confirmation, and I found a press release 3018 # on the Web page of the Haitian Consulate in Chicago (2005-03-31), 3019 # <http://www.haitianconsulate.org/time.doc>. Translated from French, it says: 3020 # 3021 # "The Prime Minister's Communication Office notifies the public in general 3022 # and the press in particular that, following a decision of the Interior 3023 # Ministry and the Territorial Collectivities [I suppose that means the 3024 # provinces], Haiti will move to Eastern Daylight Time in the night from next 3025 # Saturday the 2nd to Sunday the 3rd. 3026 # 3027 # "Consequently, the Prime Minister's Communication Office wishes to inform 3028 # the population that the country's clocks will be set forward one hour 3029 # starting at midnight. This provision will hold until the last Saturday in 3030 # October 2005. 3031 # 3032 # "Port-au-Prince, March 31, 2005" 3033 # 3034 # From Steffen Thorsen (2006-04-04): 3035 # I have been informed by users that Haiti observes DST this year like 3036 # last year, so the current "only" rule for 2005 might be changed to a 3037 # "max" rule or to last until 2006. (Who knows if they will observe DST 3038 # next year or if they will extend their DST like US/Canada next year). 3039 # 3040 # I have found this article about it (in French): 3041 # http://www.haitipressnetwork.com/news.cfm?articleID=7612 3042 # 3043 # The reason seems to be an energy crisis. 3044 3045 # From Stephen Colebourne (2007-02-22): 3046 # Some IATA info: Haiti won't be having DST in 2007. 3047 3048 # From Steffen Thorsen (2012-03-11): 3049 # According to several news sources, Haiti will observe DST this year, 3050 # apparently using the same start and end date as USA/Canada. 3051 # So this means they have already changed their time. 3052 # 3053 # http://www.alterpresse.org/spip.php?article12510 3054 # http://radiovision2000haiti.net/home/?p=13253 3055 # 3056 # From Arthur David Olson (2012-03-11): 3057 # The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to 3058 # 3:00 a.m. rather than the traditional Haitian jump at midnight. 3059 # Assume a US-style fall back as well. 3060 3061 # From Steffen Thorsen (2013-03-10): 3062 # It appears that Haiti is observing DST this year as well, same rules 3063 # as US/Canada. They did it last year as well, and it looks like they 3064 # are going to observe DST every year now... 3065 # 3066 # http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/ 3067 # http://www.canalplushaiti.net/?p=6714 3068 3069 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3070 Rule Haiti 1983 only - May 8 0:00 1:00 D 3071 Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 3072 Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S 3073 # Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 3074 # Go with IATA. 3075 Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 3076 Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 3077 Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 3078 Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S 3079 Rule Haiti 2012 max - Mar Sun>=8 2:00 1:00 D 3080 Rule Haiti 2012 max - Nov Sun>=1 2:00 0 S 3081 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3082 Zone America/Port-au-Prince -4:49:20 - LMT 1890 3083 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 3084 -5:00 Haiti E%sT 3085 3086 # Honduras 3087 # Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 3088 3089 # From Paul Eggert (2006-05-05): 3090 # worldtimezone.com reports a 2006-05-02 Spanish-language AP article 3091 # saying Honduras will start using DST midnight Saturday, effective 4 3092 # months until September. La Tribuna reported today 3093 # <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 3094 # of Honduras, refused to back down on this. 3095 3096 # From Jesper Nørgaard Welen (2006-08-08): 3097 # It seems that Honduras has returned from DST to standard time this Monday at 3098 # 00:00 hours (prolonging Sunday to 25 hours duration). 3099 # http://www.worldtimezone.com/dst_news/dst_news_honduras04.html 3100 3101 # From Paul Eggert (2006-08-08): 3102 # Also see Diario El Heraldo, The country returns to standard time (2006-08-08). 3103 # http://www.elheraldo.hn/nota.php?nid=54941&sec=12 3104 # It mentions executive decree 18-2006. 3105 3106 # From Steffen Thorsen (2006-08-17): 3107 # Honduras will observe DST from 2007 to 2009, exact dates are not 3108 # published, I have located this authoritative source: 3109 # http://www.presidencia.gob.hn/noticia.aspx?nId=47 3110 3111 # From Steffen Thorsen (2007-03-30): 3112 # http://www.laprensahn.com/pais_nota.php?id04962=7386 3113 # So it seems that Honduras will not enter DST this year.... 3114 3115 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3116 Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 3117 Rule Hond 1987 1988 - Sep lastSun 0:00 0 S 3118 Rule Hond 2006 only - May Sun>=1 0:00 1:00 D 3119 Rule Hond 2006 only - Aug Mon>=1 0:00 0 S 3120 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3121 Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 3122 -6:00 Hond C%sT 3123 # 3124 # Great Swan I ceded by US to Honduras in 1972 3125 3126 # Jamaica 3127 # Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an 3128 # unspecified official document, and says "This time is used throughout the 3129 # island". Go with Milne. Round to the nearest second as required by zic. 3130 # 3131 # Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but 3132 # Lance Neita writes that Prime Minister Michael Manley decreed it January 5. 3133 # Assume Neita meant Jan 6 02:00, the same as the US. Neita also writes that 3134 # Manley's supporters associated this act with Manley's nickname "Joshua" 3135 # (recall that in the Bible the sun stood still at Joshua's request), 3136 # and with the Rod of Correction which Manley said he had received from 3137 # Haile Selassie, Emperor of Ethiopia. See: 3138 # Neita L. The politician in all of us. Jamaica Observer 2014-09-20 3139 # http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647 3140 # 3141 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3142 Zone America/Jamaica -5:07:11 - LMT 1890 # Kingston 3143 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3144 -5:00 - EST 1974 3145 -5:00 US E%sT 1984 3146 -5:00 - EST 3147 3148 # Martinique 3149 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3150 Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 3151 -4:04:20 - FFMT 1911 May # Fort-de-France MT 3152 -4:00 - AST 1980 Apr 6 3153 -4:00 1:00 ADT 1980 Sep 28 3154 -4:00 - AST 3155 3156 # Montserrat 3157 # See America/Port_of_Spain. 3158 3159 # Nicaragua 3160 # 3161 # This uses Shanks & Pottenger for times before 2005. 3162 # 3163 # From Steffen Thorsen (2005-04-12): 3164 # I've got reports from 8 different people that Nicaragua just started 3165 # DST on Sunday 2005-04-10, in order to save energy because of 3166 # expensive petroleum. The exact end date for DST is not yet 3167 # announced, only "September" but some sites also say "mid-September". 3168 # Some background information is available on the President's official site: 3169 # http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 3170 # The Decree, no 23-2005 is available here: 3171 # 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 3172 # 3173 # From Paul Eggert (2005-05-01): 3174 # The decree doesn't say anything about daylight saving, but for now let's 3175 # assume that it is daylight saving.... 3176 # 3177 # From Gwillim Law (2005-04-21): 3178 # The Associated Press story on the time change, which can be found at 3179 # http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 3180 # and elsewhere, says (fifth paragraph, translated from Spanish): "The last 3181 # time that a change of clocks was applied to save energy was in the year 2000 3182 # during the Arnoldo Alemán administration."... 3183 # The northamerica file says that Nicaragua has been on UTC-6 continuously 3184 # since December 1998. I wasn't able to find any details of Nicaraguan time 3185 # changes in 2000. Perhaps a note could be added to the northamerica file, to 3186 # the effect that we have indirect evidence that DST was observed in 2000. 3187 # 3188 # From Jesper Nørgaard Welen (2005-11-02): 3189 # Nicaragua left DST the 2005-10-02 at 00:00 (local time). 3190 # http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 3191 # (2005-09-26) 3192 # 3193 # From Jesper Nørgaard Welen (2006-05-05): 3194 # http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 3195 # (my informal translation) 3196 # By order of the president of the republic, Enrique Bolaños, Nicaragua 3197 # advanced by sixty minutes their official time, yesterday at 2 in the 3198 # morning, and will stay that way until 30th of September. 3199 # 3200 # From Jesper Nørgaard Welen (2006-09-30): 3201 # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf 3202 # My informal translation runs: 3203 # The natural sun time is restored in all the national territory, in that the 3204 # time is returned one hour at 01:00 am of October 1 of 2006. 3205 # 3206 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3207 Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 3208 Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 3209 Rule Nic 2005 only - Apr 10 0:00 1:00 D 3210 Rule Nic 2005 only - Oct Sun>=1 0:00 0 S 3211 Rule Nic 2006 only - Apr 30 2:00 1:00 D 3212 Rule Nic 2006 only - Oct Sun>=1 1:00 0 S 3213 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3214 Zone America/Managua -5:45:08 - LMT 1890 3215 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 3216 -6:00 - CST 1973 May 3217 -5:00 - EST 1975 Feb 16 3218 -6:00 Nic C%sT 1992 Jan 1 4:00 3219 -5:00 - EST 1992 Sep 24 3220 -6:00 - CST 1993 3221 -5:00 - EST 1997 3222 -6:00 Nic C%sT 3223 3224 # Panama 3225 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3226 Zone America/Panama -5:18:08 - LMT 1890 3227 -5:19:36 - CMT 1908 Apr 22 # Colón Mean Time 3228 -5:00 - EST 3229 3230 # Puerto Rico 3231 # There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'. 3232 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3233 Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 3234 -4:00 - AST 1942 May 3 3235 -4:00 US A%sT 1946 3236 -4:00 - AST 3237 3238 # St Kitts-Nevis 3239 # St Lucia 3240 # See America/Port_of_Spain. 3241 3242 # St Pierre and Miquelon 3243 # There are too many St Pierres elsewhere, so we'll use 'Miquelon'. 3244 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3245 Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 3246 -4:00 - AST 1980 May 3247 -3:00 - PMST 1987 # Pierre & Miquelon Time 3248 -3:00 Canada PM%sT 3249 3250 # St Vincent and the Grenadines 3251 # See America/Port_of_Spain. 3252 3253 # Turks and Caicos 3254 # 3255 # From Chris Dunn in 3256 # http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007 3257 # (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the 3258 # daylight saving dates for time changes have been adjusted to match 3259 # the recent U.S. change of dates. 3260 # 3261 # From Brian Inglis (2007-04-28): 3262 # http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 3263 # there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 3264 # rows before that there is an out of date entry for Oct: 3265 # "Eastern Standard Times Begins 2007 3266 # Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 3267 # indicating that the normal ET rules are followed. 3268 # 3269 # From Paul Eggert (2014-08-19): 3270 # The 2014-08-13 Cabinet meeting decided to stay on UTC-4 year-round. See: 3271 # http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm 3272 # Model this as a switch from EST/EDT to AST ... 3273 # From Chris Walton (2014-11-04): 3274 # ... the TCI government appears to have delayed the switch to 3275 # "permanent daylight saving time" by one year.... 3276 # http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm 3277 # 3278 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3279 Zone America/Grand_Turk -4:44:32 - LMT 1890 3280 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3281 -5:00 - EST 1979 3282 -5:00 US E%sT 2015 Nov Sun>=1 2:00 3283 -4:00 - AST 3284 3285 # British Virgin Is 3286 # Virgin Is 3287 # See America/Port_of_Spain. 3288 3289 3290 # Local Variables: 3291 # coding: utf-8 3292 # End: