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 30 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 the abbreviation 254 # "Chamorro Standard Time" for time in Guam and the Northern Marianas. 255 # See the file "australasia". 256 257 # From Arthur David Olson, 2005-08-09 258 # The following was signed into law on 2005-08-08. 259 # 260 # H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. 261 # (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15 262 # U.S.C. 260a(a)) is amended-- 263 # (1) by striking "first Sunday of April" and inserting "second 264 # Sunday of March"; and 265 # (2) by striking "last Sunday of October" and inserting "first 266 # Sunday of November'. 267 # (b) Effective Date.--Subsection (a) shall take effect 1 year after the 268 # date of enactment of this Act or March 1, 2007, whichever is later. 269 # (c) Report to Congress.--Not later than 9 months after the effective 270 # date stated in subsection (b), the Secretary shall report to Congress 271 # on the impact of this section on energy consumption in the United 272 # States. 273 # (d) Right to Revert.--Congress retains the right to revert the 274 # Daylight Saving Time back to the 2005 time schedules once the 275 # Department study is complete. 276 277 # US eastern time, represented by New York 278 279 # Connecticut, Delaware, District of Columbia, most of Florida, 280 # Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky 281 # (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, 282 # New Hampshire, New Jersey, New York, North Carolina, Ohio, 283 # Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 284 # Vermont, Virginia, West Virginia 285 286 # From Dave Cantor (2004-11-02): 287 # Early this summer I had the occasion to visit the Mount Washington 288 # Observatory weather station atop (of course!) Mount Washington [, NH].... 289 # One of the staff members said that the station was on Eastern Standard Time 290 # and didn't change their clocks for Daylight Saving ... so that their 291 # reports will always have times which are 5 hours behind UTC. 292 293 # From Paul Eggert (2005-08-26): 294 # According to today's Huntsville Times 295 # http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1 296 # a few towns on Alabama's "eastern border with Georgia, such as Phenix City 297 # in Russell County, Lanett in Chambers County and some towns in Lee County, 298 # set their watches and clocks on Eastern time." It quotes H.H. "Bubba" 299 # Roberts, city administrator in Phenix City. as saying "We are in the Central 300 # time zone, but we do go by the Eastern time zone because so many people work 301 # in Columbus." 302 303 # From Paul Eggert (2014-09-06): 304 # Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208 305 # says that New York City Hall time was 3 minutes 58.4 seconds fast of 306 # Eastern time (i.e., -4:56:01.6) just before the 1883 switch. Round to the 307 # nearest second. 308 309 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 310 Rule NYC 1920 only - Mar lastSun 2:00 1:00 D 311 Rule NYC 1920 only - Oct lastSun 2:00 0 S 312 Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 313 Rule NYC 1921 1954 - Sep lastSun 2:00 0 S 314 Rule NYC 1955 1966 - Oct lastSun 2:00 0 S 315 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 316 Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 317 -5:00 US E%sT 1920 318 -5:00 NYC E%sT 1942 319 -5:00 US E%sT 1946 320 -5:00 NYC E%sT 1967 321 -5:00 US E%sT 322 323 # US central time, represented by Chicago 324 325 # Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, 326 # Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and 327 # Washington counties), Illinois, western Indiana 328 # (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 329 # Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 330 # Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 331 # Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 332 # western Tennessee, most of Texas, Wisconsin 333 334 # From Larry M. Smith (2006-04-26) re Wisconsin: 335 # http://www.legis.state.wi.us/statutes/Stat0175.pdf ... 336 # is currently enforced at the 01:00 time of change. Because the local 337 # "bar time" in the state corresponds to 02:00, a number of citations 338 # are issued for the "sale of class 'B' alcohol after prohibited 339 # hours" within the deviated hour of this change every year.... 340 # 341 # From Douglas R. Bomberg (2007-03-12): 342 # Wisconsin has enacted (nearly eleventh-hour) legislation to get WI 343 # Statue 175 closer in synch with the US Congress' intent.... 344 # http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf 345 346 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 347 Rule Chicago 1920 only - Jun 13 2:00 1:00 D 348 Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S 349 Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D 350 Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 351 Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S 352 Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S 353 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 354 Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 355 -6:00 US C%sT 1920 356 -6:00 Chicago C%sT 1936 Mar 1 2:00 357 -5:00 - EST 1936 Nov 15 2:00 358 -6:00 Chicago C%sT 1942 359 -6:00 US C%sT 1946 360 -6:00 Chicago C%sT 1967 361 -6:00 US C%sT 362 # Oliver County, ND switched from mountain to central time on 1992-10-25. 363 Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 364 -7:00 US M%sT 1992 Oct 25 2:00 365 -6:00 US C%sT 366 # Morton County, ND, switched from mountain to central time on 367 # 2003-10-26, except for the area around Mandan which was already central time. 368 # See <http://dmses.dot.gov/docimages/p63/135818.pdf>. 369 # Officially this switch also included part of Sioux County, and 370 # Jones, Mellette, and Todd Counties in South Dakota; 371 # but in practice these other counties were already observing central time. 372 # See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. 373 Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 374 -7:00 US M%sT 2003 Oct 26 2:00 375 -6:00 US C%sT 376 377 # From Josh Findley (2011-01-21): 378 # ...it appears that Mercer County, North Dakota, changed from the 379 # mountain time zone to the central time zone at the last transition from 380 # daylight-saving to standard time (on Nov. 7, 2010): 381 # http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm 382 # http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html 383 384 # From Andy Lipscomb (2011-01-24): 385 # ...according to the Census Bureau, the largest city is Beulah (although 386 # it's commonly referred to as Beulah-Hazen, with Hazen being the next 387 # largest city in Mercer County). Google Maps places Beulah's city hall 388 # at 47 degrees 15' 51" N, 101 degrees 46' 40" W, which yields an offset 389 # of 6h47'07". 390 391 Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53 392 -7:00 US M%sT 2010 Nov 7 2:00 393 -6:00 US C%sT 394 395 # US mountain time, represented by Denver 396 # 397 # Colorado, far western Kansas, Montana, western 398 # Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 399 # New Mexico, southwestern North Dakota, 400 # western South Dakota, far western Texas (El Paso County, Hudspeth County, 401 # and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 402 # 403 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 404 Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 405 Rule Denver 1920 only - Oct lastSun 2:00 0 S 406 Rule Denver 1921 only - May 22 2:00 0 S 407 Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 408 Rule Denver 1965 1966 - Oct lastSun 2:00 0 S 409 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 410 Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 411 -7:00 US M%sT 1920 412 -7:00 Denver M%sT 1942 413 -7:00 US M%sT 1946 414 -7:00 Denver M%sT 1967 415 -7:00 US M%sT 416 417 # US Pacific time, represented by Los Angeles 418 # 419 # California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 420 # Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county 421 # north of the Salmon River, and the towns of Burgdorf and Warren), 422 # Nevada (except West Wendover), Oregon (except the northern 3/4 of 423 # Malheur county), and Washington 424 # 425 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 426 Rule CA 1948 only - Mar 14 2:00 1:00 D 427 Rule CA 1949 only - Jan 1 2:00 0 S 428 Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D 429 Rule CA 1950 1961 - Sep lastSun 2:00 0 S 430 Rule CA 1962 1966 - Oct lastSun 2:00 0 S 431 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 432 Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 433 -8:00 US P%sT 1946 434 -8:00 CA P%sT 1967 435 -8:00 US P%sT 436 437 # Alaska 438 # AK%sT is the modern abbreviation for -9:00 per USNO. 439 # 440 # From Paul Eggert (2001-05-30): 441 # Howse writes that Alaska switched from the Julian to the Gregorian calendar, 442 # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 443 # This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 444 # also a Friday. Include only the time zone part of this transition, 445 # ignoring the switch from Julian to Gregorian, since we can't represent 446 # the Julian calendar. 447 # 448 # As far as we know, none of the exact locations mentioned below were 449 # permanently inhabited in 1867 by anyone using either calendar. 450 # (Yakutat was colonized by the Russians in 1799, but the settlement 451 # was destroyed in 1805 by a Yakutat-kon war party.) However, there 452 # were nearby inhabitants in some cases and for our purposes perhaps 453 # it's best to simply use the official transition. 454 455 # From Paul Eggert (2014-07-18): 456 # One opinion of the early-1980s turmoil in Alaska over time zones and 457 # daylight saving time appeared as graffiti on a Juneau airport wall: 458 # "Welcome to Juneau. Please turn your watch back to the 19th century." 459 # See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01. 460 # http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html 461 # 462 # Steve Ferguson (2011-01-31) referred to the following source: 463 # Norris F. Keeping time in Alaska: national directives, local response. 464 # Alaska History 2001;16(1-2). 465 # http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/ 466 467 # From Arthur David Olson (2011-02-01): 468 # Here's database-relevant material from the 2001 "Alaska History" article: 469 # 470 # On September 20 [1979]...DOT...officials decreed that on April 27, 471 # 1980, Juneau and other nearby communities would move to Yukon Time. 472 # Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on 473 # Pacific Time. 474 # 475 # ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the 476 # Department's September 1979 decision. Juneau and other communities in 477 # northern Southeast reverted to Pacific Time on October 26. 478 # 479 # On October 28 [1983]...the Metlakatla Indian Community Council voted 480 # unanimously to keep the reservation on Pacific Time. 481 # 482 # According to DOT official Joanne Petrie, Indian reservations are not 483 # bound to follow time zones imposed by neighboring jurisdictions. 484 # 485 # (The last is consistent with how the database now handles the Navajo 486 # Nation.) 487 488 # From Arthur David Olson (2011-02-09): 489 # I just spoke by phone with a staff member at the Metlakatla Indian 490 # Community office (using contact information available at 491 # http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla 492 # It's shortly after 1:00 here on the east coast of the United States; 493 # the staffer said it was shortly after 10:00 there. When I asked whether 494 # that meant they were on Pacific time, they said no - they were on their 495 # own time. I asked about daylight saving; they said it wasn't used. I 496 # did not inquire about practices in the past. 497 498 # From Arthur David Olson (2011-08-17): 499 # For lack of better information, assume that Metlakatla's 500 # abandonment of use of daylight saving resulted from the 1983 vote. 501 502 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 503 Zone America/Juneau 15:02:19 - LMT 1867 Oct 18 504 -8:57:41 - LMT 1900 Aug 20 12:00 505 -8:00 - PST 1942 506 -8:00 US P%sT 1946 507 -8:00 - PST 1969 508 -8:00 US P%sT 1980 Apr 27 2:00 509 -9:00 US Y%sT 1980 Oct 26 2:00 510 -8:00 US P%sT 1983 Oct 30 2:00 511 -9:00 US Y%sT 1983 Nov 30 512 -9:00 US AK%sT 513 Zone America/Sitka 14:58:47 - LMT 1867 Oct 18 514 -9:01:13 - LMT 1900 Aug 20 12:00 515 -8:00 - PST 1942 516 -8:00 US P%sT 1946 517 -8:00 - PST 1969 518 -8:00 US P%sT 1983 Oct 30 2:00 519 -9:00 US Y%sT 1983 Nov 30 520 -9:00 US AK%sT 521 Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 18 522 -8:46:18 - LMT 1900 Aug 20 12:00 523 -8:00 - PST 1942 524 -8:00 US P%sT 1946 525 -8:00 - PST 1969 526 -8:00 US P%sT 1983 Oct 30 2:00 527 -8:00 - PST 528 Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 529 -9:18:55 - LMT 1900 Aug 20 12:00 530 -9:00 - YST 1942 531 -9:00 US Y%sT 1946 532 -9:00 - YST 1969 533 -9:00 US Y%sT 1983 Nov 30 534 -9:00 US AK%sT 535 Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18 536 -9:59:36 - LMT 1900 Aug 20 12:00 537 -10:00 - CAT 1942 538 -10:00 US CAT/CAWT 1945 Aug 14 23:00u 539 -10:00 US CAT/CAPT 1946 # Peace 540 -10:00 - CAT 1967 Apr 541 -10:00 - AHST 1969 542 -10:00 US AH%sT 1983 Oct 30 2:00 543 -9:00 US Y%sT 1983 Nov 30 544 -9:00 US AK%sT 545 Zone America/Nome 12:58:21 - LMT 1867 Oct 18 546 -11:01:38 - LMT 1900 Aug 20 12:00 547 -11:00 - NST 1942 548 -11:00 US N%sT 1946 549 -11:00 - NST 1967 Apr 550 -11:00 - BST 1969 551 -11:00 US B%sT 1983 Oct 30 2:00 552 -9:00 US Y%sT 1983 Nov 30 553 -9:00 US AK%sT 554 Zone America/Adak 12:13:21 - LMT 1867 Oct 18 555 -11:46:38 - LMT 1900 Aug 20 12:00 556 -11:00 - NST 1942 557 -11:00 US N%sT 1946 558 -11:00 - NST 1967 Apr 559 -11:00 - BST 1969 560 -11:00 US B%sT 1983 Oct 30 2:00 561 -10:00 US AH%sT 1983 Nov 30 562 -10:00 US HA%sT 563 # The following switches don't quite make our 1970 cutoff. 564 # 565 # Shanks writes that part of southwest Alaska (e.g. Aniak) 566 # switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 567 # and another part (e.g. Akiak) made the same switch five weeks later. 568 # 569 # From David Flater (2004-11-09): 570 # In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 571 # Historic Preservation Commission, provided this information, which 572 # suggests that Unalaska deviated from statutory time from early 1967 573 # possibly until 1983: 574 # 575 # Minutes of the Unalaska City Council Meeting, January 10, 1967: 576 # "Except for St. Paul and Akutan, Unalaska is the only important 577 # location not on Alaska Standard Time. The following resolution was 578 # made by William Robinson and seconded by Henry Swanson: Be it 579 # resolved that the City of Unalaska hereby goes to Alaska Standard 580 # Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 581 # January 14, Alaska Standard Time.) This resolution was passed with 582 # three votes for and one against." 583 584 # Hawaii 585 586 # From Arthur David Olson (2010-12-09): 587 # "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 588 # of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, 589 # the article is available at 590 # http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf 591 # and indicates that standard time was adopted effective noon, January 592 # 13, 1896 (page 218), that in "1933, the Legislature decreed daylight 593 # saving for the period between the last Sunday of each April and the 594 # last Sunday of each September, but less than a month later repealed the 595 # act," (page 220), that year-round daylight saving time was in effect 596 # from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for 597 # when clocks changed) and that clocks were changed by 30 minutes 598 # effective the second Sunday of June, 1947 (page 219, with no time of 599 # day given for when clocks changed). A footnote for the 1933 changes 600 # cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) 601 # and Act 163 (approved 21 May 1933)." 602 603 # From Arthur David Olson (2011-01-19): 604 # The following is from "Laws of the Territory of Hawaii Passed by the 605 # Seventeenth Legislature: Regular Session 1933," available (as of 606 # 2011-01-19) at American University's Pence Law Library. Page 85: "Act 607 # 90...At 2 o'clock ante meridian of the last Sunday in April of each 608 # year, the standard time of this Territory shall be advanced one 609 # hour...This Act shall take effect upon its approval. Approved this 26th 610 # day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of 611 # Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is 612 # hereby repealed...This Act shall take effect upon its approval, upon 613 # which date the standard time of this Territory shall be restored to 614 # that existing immediately prior to the taking effect of said Act 90. 615 # Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor 616 # of the Territory of Hawaii." 617 # 618 # Note that 1933-05-21 was a Sunday. 619 # We're left to guess the time of day when Act 163 was approved; guess noon. 620 621 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 622 Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 623 -10:30 - HST 1933 Apr 30 2:00 624 -10:30 1:00 HDT 1933 May 21 12:00 625 -10:30 - HST 1942 Feb 9 2:00 626 -10:30 1:00 HDT 1945 Sep 30 2:00 627 -10:30 - HST 1947 Jun 8 2:00 628 -10:00 - HST 629 Link Pacific/Honolulu Pacific/Johnston 630 631 # Now we turn to US areas that have diverged from the consensus since 1970. 632 633 # Arizona mostly uses MST. 634 635 # From Paul Eggert (2002-10-20): 636 # 637 # The information in the rest of this paragraph is derived from the 638 # Daylight Saving Time web page 639 # <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23) 640 # maintained by the Arizona State Library, Archives and Public Records. 641 # Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 642 # time, but by federal law railroads, airlines, bus lines, military 643 # personnel, and some engaged in interstate commerce continued to 644 # observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 645 # Gazette says that was the date the law changed, and that 04-01 was 646 # the date the state's clocks would change. In 1945 the State of 647 # Arizona used standard time all year, again with exceptions only as 648 # mandated by federal law. Arizona observed DST in 1967, but Arizona 649 # Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 650 # 651 # Shanks says the 1944 experiment came to an end on 1944-03-17. 652 # Go with the Arizona State Library instead. 653 654 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 655 Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 656 -7:00 US M%sT 1944 Jan 1 0:01 657 -7:00 - MST 1944 Apr 1 0:01 658 -7:00 US M%sT 1944 Oct 1 0:01 659 -7:00 - MST 1967 660 -7:00 US M%sT 1968 Mar 21 661 -7:00 - MST 662 # From Arthur David Olson (1988-02-13): 663 # A writer from the Inter Tribal Council of Arizona, Inc., 664 # notes in private correspondence dated 1987-12-28 that "Presently, only the 665 # Navajo Nation participates in the Daylight Saving Time policy, due to its 666 # large size and location in three states." (The "only" means that other 667 # tribal nations don't use DST.) 668 # 669 # From Paul Eggert (2013-08-26): 670 # See America/Denver for a zone appropriate for the Navajo Nation. 671 672 # Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 673 # Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 674 # Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 675 # Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 676 # Teton, Twin Falls, Valley, Washington counties, and the southern 677 # quarter of Idaho county) and eastern Oregon (most of Malheur County) 678 # switched four weeks late in 1974. 679 # 680 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 681 Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 682 -8:00 US P%sT 1923 May 13 2:00 683 -7:00 US M%sT 1974 684 -7:00 - MST 1974 Feb 3 2:00 685 -7:00 US M%sT 686 687 # Indiana 688 # 689 # For a map of Indiana's time zone regions, see: 690 # http://en.wikipedia.org/wiki/Time_in_Indiana 691 # 692 # From Paul Eggert (2007-08-17): 693 # Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 694 # with the following exceptions: 695 # 696 # - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 697 # Vanderburgh, and Warrick counties have been like America/Chicago. 698 # 699 # - Dearborn and Ohio counties have been like America/New_York. 700 # 701 # - Clark, Floyd, and Harrison counties have been like 702 # America/Kentucky/Louisville. 703 # 704 # - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, 705 # and Switzerland counties have their own time zone histories as noted below. 706 # 707 # Shanks partitioned Indiana into 345 regions, each with its own time history, 708 # and wrote "Even newspaper reports present contradictory information." 709 # Those Hoosiers! Such a flighty and changeable people! 710 # Fortunately, most of the complexity occurred before our cutoff date of 1970. 711 # 712 # Other than Indianapolis, the Indiana place names are so nondescript 713 # that they would be ambiguous if we left them at the 'America' level. 714 # So we reluctantly put them all in a subdirectory 'America/Indiana'. 715 716 # From Paul Eggert (2014-06-26): 717 # https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana 718 # says "DOT is relocating the time zone boundary in Indiana to move Starke, 719 # Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 720 # Eastern Time Zone to the Central Time Zone.... The effective date of 721 # this rule is 2 a.m. EST Sunday, April 2, 2006, which is the 722 # changeover date from standard time to Daylight Saving Time." 723 # Strictly speaking, this meant the affected counties changed their 724 # clocks twice that night, but this obviously was in error. The intent 725 # was that 01:59:59 EST be followed by 02:00:00 CDT. 726 727 # From Gwillim Law (2007-02-10): 728 # The Associated Press has been reporting that Pulaski County, Indiana is 729 # going to switch from Central to Eastern Time on March 11, 2007.... 730 # http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 731 732 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 733 Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D 734 Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 735 Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 736 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 737 Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 738 -6:00 US C%sT 1920 739 -6:00 Indianapolis C%sT 1942 740 -6:00 US C%sT 1946 741 -6:00 Indianapolis C%sT 1955 Apr 24 2:00 742 -5:00 - EST 1957 Sep 29 2:00 743 -6:00 - CST 1958 Apr 27 2:00 744 -5:00 - EST 1969 745 -5:00 US E%sT 1971 746 -5:00 - EST 2006 747 -5:00 US E%sT 748 # 749 # Eastern Crawford County, Indiana, left its clocks alone in 1974, 750 # as well as from 1976 through 2005. 751 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 752 Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D 753 Rule Marengo 1951 only - Sep lastSun 2:00 0 S 754 Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 755 Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S 756 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 757 Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 758 -6:00 US C%sT 1951 759 -6:00 Marengo C%sT 1961 Apr 30 2:00 760 -5:00 - EST 1969 761 -5:00 US E%sT 1974 Jan 6 2:00 762 -6:00 1:00 CDT 1974 Oct 27 2:00 763 -5:00 US E%sT 1976 764 -5:00 - EST 2006 765 -5:00 US E%sT 766 # 767 # Daviess, Dubois, Knox, and Martin Counties, Indiana, 768 # switched from eastern to central time in April 2006, then switched back 769 # in November 2007. 770 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 771 Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 772 Rule Vincennes 1946 only - Sep lastSun 2:00 0 S 773 Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 774 Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 775 Rule Vincennes 1955 only - May 1 0:00 1:00 D 776 Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 777 Rule Vincennes 1960 only - Oct lastSun 2:00 0 S 778 Rule Vincennes 1961 only - Sep lastSun 2:00 0 S 779 Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 780 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 781 Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 782 -6:00 US C%sT 1946 783 -6:00 Vincennes C%sT 1964 Apr 26 2:00 784 -5:00 - EST 1969 785 -5:00 US E%sT 1971 786 -5:00 - EST 2006 Apr 2 2:00 787 -6:00 US C%sT 2007 Nov 4 2:00 788 -5:00 US E%sT 789 # 790 # Perry County, Indiana, switched from eastern to central time in April 2006. 791 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 792 Rule Perry 1946 only - Apr lastSun 2:00 1:00 D 793 Rule Perry 1946 only - Sep lastSun 2:00 0 S 794 Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D 795 Rule Perry 1953 1959 - Sep lastSun 2:00 0 S 796 Rule Perry 1955 only - May 1 0:00 1:00 D 797 Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D 798 Rule Perry 1960 only - Oct lastSun 2:00 0 S 799 Rule Perry 1961 only - Sep lastSun 2:00 0 S 800 Rule Perry 1962 1963 - Oct lastSun 2:00 0 S 801 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 802 Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 803 -6:00 US C%sT 1946 804 -6:00 Perry C%sT 1964 Apr 26 2:00 805 -5:00 - EST 1969 806 -5:00 US E%sT 1971 807 -5:00 - EST 2006 Apr 2 2:00 808 -6:00 US C%sT 809 # 810 # Pike County, Indiana moved from central to eastern time in 1977, 811 # then switched back in 2006, then switched back again in 2007. 812 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 813 Rule Pike 1955 only - May 1 0:00 1:00 D 814 Rule Pike 1955 1960 - Sep lastSun 2:00 0 S 815 Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 816 Rule Pike 1961 1964 - Oct lastSun 2:00 0 S 817 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 818 Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 819 -6:00 US C%sT 1955 820 -6:00 Pike C%sT 1965 Apr 25 2:00 821 -5:00 - EST 1966 Oct 30 2:00 822 -6:00 US C%sT 1977 Oct 30 2:00 823 -5:00 - EST 2006 Apr 2 2:00 824 -6:00 US C%sT 2007 Nov 4 2:00 825 -5:00 US E%sT 826 # 827 # Starke County, Indiana moved from central to eastern time in 1991, 828 # then switched back in 2006. 829 # From Arthur David Olson (1991-10-28): 830 # An article on page A3 of the Sunday, 1991-10-27 Washington Post 831 # notes that Starke County switched from Central time to Eastern time as of 832 # 1991-10-27. 833 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 834 Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 835 Rule Starke 1947 1954 - Sep lastSun 2:00 0 S 836 Rule Starke 1955 1956 - Oct lastSun 2:00 0 S 837 Rule Starke 1957 1958 - Sep lastSun 2:00 0 S 838 Rule Starke 1959 1961 - Oct lastSun 2:00 0 S 839 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 840 Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 841 -6:00 US C%sT 1947 842 -6:00 Starke C%sT 1962 Apr 29 2:00 843 -5:00 - EST 1963 Oct 27 2:00 844 -6:00 US C%sT 1991 Oct 27 2:00 845 -5:00 - EST 2006 Apr 2 2:00 846 -6:00 US C%sT 847 # 848 # Pulaski County, Indiana, switched from eastern to central time in 849 # April 2006 and then switched back in March 2007. 850 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 851 Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 852 Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 853 Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 854 Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 855 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 856 Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 857 -6:00 US C%sT 1946 858 -6:00 Pulaski C%sT 1961 Apr 30 2:00 859 -5:00 - EST 1969 860 -5:00 US E%sT 1971 861 -5:00 - EST 2006 Apr 2 2:00 862 -6:00 US C%sT 2007 Mar 11 2:00 863 -5:00 US E%sT 864 # 865 # Switzerland County, Indiana, did not observe DST from 1973 through 2005. 866 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 867 Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 868 -6:00 US C%sT 1954 Apr 25 2:00 869 -5:00 - EST 1969 870 -5:00 US E%sT 1973 871 -5:00 - EST 2006 872 -5:00 US E%sT 873 874 # Part of Kentucky left its clocks alone in 1974. 875 # This also includes Clark, Floyd, and Harrison counties in Indiana. 876 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 877 Rule Louisville 1921 only - May 1 2:00 1:00 D 878 Rule Louisville 1921 only - Sep 1 2:00 0 S 879 Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 880 Rule Louisville 1941 only - Sep lastSun 2:00 0 S 881 Rule Louisville 1946 only - Jun 2 2:00 0 S 882 Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S 883 Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S 884 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 885 Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 886 -6:00 US C%sT 1921 887 -6:00 Louisville C%sT 1942 888 -6:00 US C%sT 1946 889 -6:00 Louisville C%sT 1961 Jul 23 2:00 890 -5:00 - EST 1968 891 -5:00 US E%sT 1974 Jan 6 2:00 892 -6:00 1:00 CDT 1974 Oct 27 2:00 893 -5:00 US E%sT 894 # 895 # Wayne County, Kentucky 896 # 897 # From Lake Cumberland LIFE 898 # http://www.lake-cumberland.com/life/archive/news990129time.shtml 899 # (1999-01-29) via WKYM-101.7: 900 # Clinton County has joined Wayne County in asking the DoT to change from 901 # the Central to the Eastern time zone.... The Wayne County government made 902 # the same request in December. And while Russell County officials have not 903 # taken action, the majority of respondents to a poll conducted there in 904 # August indicated they would like to change to "fast time" also. 905 # The three Lake Cumberland counties are the farthest east of any U.S. 906 # location in the Central time zone. 907 # 908 # From Rich Wales (2000-08-29): 909 # After prolonged debate, and despite continuing deep differences of opinion, 910 # Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 911 # (-0500) time. They won't "fall back" this year. See Sara Shipley, 912 # The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 913 # 914 # From Paul Eggert (2001-07-16): 915 # The final rule was published in the 916 # Federal Register 65, 160 (2000-08-17), pp 50154-50158. 917 # http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22 918 # 919 Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 920 -6:00 US C%sT 1946 921 -6:00 - CST 1968 922 -6:00 US C%sT 2000 Oct 29 2:00 923 -5:00 US E%sT 924 925 926 # From Rives McDow (2000-08-30): 927 # Here ... are all the changes in the US since 1985. 928 # Kearny County, KS (put all of county on central; 929 # previously split between MST and CST) ... 1990-10 930 # Starke County, IN (from CST to EST) ... 1991-10 931 # Oliver County, ND (from MST to CST) ... 1992-10 932 # West Wendover, NV (from PST TO MST) ... 1999-10 933 # Wayne County, KY (from CST to EST) ... 2000-10 934 # 935 # From Paul Eggert (2001-07-17): 936 # We don't know where the line used to be within Kearny County, KS, 937 # so omit that change for now. 938 # See America/Indiana/Knox for the Starke County, IN change. 939 # See America/North_Dakota/Center for the Oliver County, ND change. 940 # West Wendover, NV officially switched from Pacific to mountain time on 941 # 1999-10-31. See the 942 # Federal Register 64, 203 (1999-10-21), pp 56705-56707. 943 # http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15 944 # However, the Federal Register says that West Wendover already operated 945 # on mountain time, and the rule merely made this official; 946 # hence a separate tz entry is not needed. 947 948 # Michigan 949 # 950 # From Bob Devine (1988-01-28): 951 # Michigan didn't observe DST from 1968 to 1973. 952 # 953 # From Paul Eggert (1999-03-31): 954 # Shanks writes that Michigan started using standard time on 1885-09-18, 955 # but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 956 # that Detroit kept 957 # 958 # local time until 1900 when the City Council decreed that clocks should 959 # be put back twenty-eight minutes to Central Standard Time. Half the 960 # city obeyed, half refused. After considerable debate, the decision 961 # was rescinded and the city reverted to Sun time. A derisive offer to 962 # erect a sundial in front of the city hall was referred to the 963 # Committee on Sewers. Then, in 1905, Central time was adopted 964 # by city vote. 965 # 966 # This story is too entertaining to be false, so go with Howse over Shanks. 967 # 968 # From Paul Eggert (2001-03-06): 969 # Garland (1927) writes "Cleveland and Detroit advanced their clocks 970 # one hour in 1914." This change is not in Shanks. We have no more 971 # info, so omit this for now. 972 # 973 # Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 974 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 975 Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D 976 Rule Detroit 1948 only - Sep lastSun 2:00 0 S 977 Rule Detroit 1967 only - Jun 14 2:00 1:00 D 978 Rule Detroit 1967 only - Oct lastSun 2:00 0 S 979 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 980 Zone America/Detroit -5:32:11 - LMT 1905 981 -6:00 - CST 1915 May 15 2:00 982 -5:00 - EST 1942 983 -5:00 US E%sT 1946 984 -5:00 Detroit E%sT 1973 985 -5:00 US E%sT 1975 986 -5:00 - EST 1975 Apr 27 2:00 987 -5:00 US E%sT 988 # 989 # Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 990 # switched from EST to CST/CDT in 1973. 991 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 992 Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D 993 Rule Menominee 1946 only - Sep lastSun 2:00 0 S 994 Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D 995 Rule Menominee 1966 only - Oct lastSun 2:00 0 S 996 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 997 Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 998 -6:00 US C%sT 1946 999 -6:00 Menominee C%sT 1969 Apr 27 2:00 1000 -5:00 - EST 1973 Apr 29 2:00 1001 -6:00 US C%sT 1002 1003 # Navassa 1004 # administered by the US Fish and Wildlife Service 1005 # claimed by US under the provisions of the 1856 Guano Islands Act 1006 # also claimed by Haiti 1007 # occupied 1857/1900 by the Navassa Phosphate Co 1008 # US lighthouse 1917/1996-09 1009 # currently uninhabited 1010 # see Mark Fineman, "An Isle Rich in Guano and Discord", 1011 # _Los Angeles Times_ (1998-11-10), A1, A10; it cites 1012 # Jimmy Skaggs, _The Great Guano Rush_ (1994). 1013 1014 ################################################################################ 1015 1016 1017 # From Paul Eggert (2006-03-22): 1018 # A good source for time zone historical data outside the U.S. is 1019 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 1020 # San Diego: ACS Publications, Inc. (2003). 1021 # 1022 # Gwillim Law writes that a good source 1023 # for recent time zone data is the International Air Transport 1024 # Association's Standard Schedules Information Manual (IATA SSIM), 1025 # published semiannually. Law sent in several helpful summaries 1026 # of the IATA's data after 1990. 1027 # 1028 # Except where otherwise noted, Shanks & Pottenger is the source for 1029 # entries through 1990, and IATA SSIM is the source for entries afterwards. 1030 # 1031 # Other sources occasionally used include: 1032 # 1033 # Edward W. Whitman, World Time Differences, 1034 # Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 1035 # which I found in the UCLA library. 1036 # 1037 # William Willett, The Waste of Daylight, 19th edition 1038 # <http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf> 1039 # [PDF] (1914-03) 1040 # 1041 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 1042 # <http://www.jstor.org/stable/1774359>. 1043 # 1044 # See the 'europe' file for Greenland. 1045 1046 # Canada 1047 1048 # From Alain LaBonté (1994-11-14): 1049 # I post here the time zone abbreviations standardized in Canada 1050 # for both English and French in the CAN/CSA-Z234.4-89 standard.... 1051 # 1052 # UTC Standard time Daylight saving time 1053 # offset French English French English 1054 # -2:30 - - HAT NDT 1055 # -3 - - HAA ADT 1056 # -3:30 HNT NST - - 1057 # -4 HNA AST HAE EDT 1058 # -5 HNE EST HAC CDT 1059 # -6 HNC CST HAR MDT 1060 # -7 HNR MST HAP PDT 1061 # -8 HNP PST HAY YDT 1062 # -9 HNY YST - - 1063 # 1064 # HN: Heure Normale ST: Standard Time 1065 # HA: Heure Avancée DT: Daylight saving Time 1066 # 1067 # A: de l'Atlantique Atlantic 1068 # C: du Centre Central 1069 # E: de l'Est Eastern 1070 # M: Mountain 1071 # N: Newfoundland 1072 # P: du Pacifique Pacific 1073 # R: des Rocheuses 1074 # T: de Terre-Neuve 1075 # Y: du Yukon Yukon 1076 # 1077 # From Paul Eggert (1994-11-22): 1078 # Alas, this sort of thing must be handled by localization software. 1079 1080 # Unless otherwise specified, the data entries for Canada are all from Shanks 1081 # & Pottenger. 1082 1083 # From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 1084 # 2007-03-01): 1085 # The British Columbia government announced yesterday that it will 1086 # adjust daylight savings next year to align with changes in the 1087 # U.S. and the rest of Canada.... 1088 # http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm 1089 # ... 1090 # Nova Scotia 1091 # Daylight saving time will be extended by four weeks starting in 2007.... 1092 # http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf 1093 # 1094 # [For New Brunswick] the new legislation dictates that the time change is to 1095 # be done at 02:00 instead of 00:01. 1096 # http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 1097 # ... 1098 # Manitoba has traditionally changed the clock every fall at 03:00. 1099 # As of 2006, the transition is to take place one hour earlier at 02:00. 1100 # http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 1101 # ... 1102 # [Alberta, Ontario, Quebec] will follow US rules. 1103 # http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 1104 # http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 1105 # http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 1106 # ... 1107 # P.E.I. will follow US rules.... 1108 # http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 1109 # ... 1110 # Province of Newfoundland and Labrador.... 1111 # http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 1112 # ... 1113 # Yukon 1114 # http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 1115 # ... 1116 # N.W.T. will follow US rules. Whoever maintains the government web site 1117 # does not seem to believe in bookmarks. To see the news release, click the 1118 # following link and search for "Daylight Savings Time Change". Press the 1119 # "Daylight Savings Time Change" link; it will fire off a popup using 1120 # JavaScript. 1121 # http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 1122 # ... 1123 # Nunavut 1124 # An amendment to the Interpretation Act was registered on February 19/2007.... 1125 # http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 1126 1127 # From Paul Eggert (2014-10-18): 1128 # H. David Matthews and Mary Vincent's map 1129 # "It's about TIME", _Canadian Geographic_ (September-October 1998) 1130 # http://www.canadiangeographic.ca/Magazine/SO98/alacarte.asp 1131 # contains detailed boundaries for regions observing nonstandard 1132 # time and daylight saving time arrangements in Canada circa 1998. 1133 # 1134 # National Research Council Canada maintains info about time zones and DST. 1135 # http://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html 1136 # http://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5 1137 # Its unofficial information is often taken from Matthews and Vincent. 1138 1139 # From Paul Eggert (2006-06-27): 1140 # For now, assume all of DST-observing Canada will fall into line with the 1141 # new US DST rules, 1142 1143 # From Chris Walton (2011-12-01) 1144 # In the first of Tammy Hardwick's articles 1145 # http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1146 # she quotes the Friday November 1/1918 edition of the Creston Review. 1147 # The quote includes these two statements: 1148 # 'Sunday the CPR went back to the old system of time...' 1149 # '... The daylight saving scheme was dropped all over Canada at the same time,' 1150 # These statements refer to a transition from daylight time to standard time 1151 # that occurred nationally on Sunday October 27/1918. This transition was 1152 # also documented in the Saturday October 26/1918 edition of the Toronto Star. 1153 1154 # In light of that evidence, we alter the date from the earlier believed 1155 # Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day 1156 # than Thursday) in all Canadian rulesets. 1157 1158 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1159 Rule Canada 1918 only - Apr 14 2:00 1:00 D 1160 Rule Canada 1918 only - Oct 27 2:00 0 S 1161 Rule Canada 1942 only - Feb 9 2:00 1:00 W # War 1162 Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 1163 Rule Canada 1945 only - Sep 30 2:00 0 S 1164 Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 1165 Rule Canada 1974 2006 - Oct lastSun 2:00 0 S 1166 Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 1167 Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 1168 Rule Canada 2007 max - Nov Sun>=1 2:00 0 S 1169 1170 1171 # Newfoundland and Labrador 1172 1173 # From Paul Eggert (2000-10-02): 1174 # Matthews and Vincent (1998) write that Labrador should use NST/NDT, 1175 # but the only part of Labrador that follows the rules is the 1176 # southeast corner, including Port Hope Simpson and Mary's Harbour, 1177 # but excluding, say, Black Tickle. 1178 1179 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1180 Rule StJohns 1917 only - Apr 8 2:00 1:00 D 1181 Rule StJohns 1917 only - Sep 17 2:00 0 S 1182 # Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 1183 Rule StJohns 1919 only - May 5 23:00 1:00 D 1184 Rule StJohns 1919 only - Aug 12 23:00 0 S 1185 # For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 1186 Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 1187 Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S 1188 # For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 1189 # Pottenger. 1190 Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 1191 Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 1192 # Whitman gives the following transitions: 1193 # 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 1194 # but go with Shanks & Pottenger and assume they used Canadian rules. 1195 # For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 1196 # Apr 30 - Sep 24; go with Shanks & Pottenger. 1197 Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 1198 Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 1199 Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 1200 Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S 1201 Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S 1202 # From Paul Eggert (2000-10-02): 1203 # INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 1204 # at 00:01 local time. For now, assume it started in 1987. 1205 1206 # From Michael Pelley (2011-09-12): 1207 # We received today, Monday, September 12, 2011, notification that the 1208 # changes to the Newfoundland Standard Time Act have been proclaimed. 1209 # The change in the Act stipulates that the change from Daylight Savings 1210 # Time to Standard Time and from Standard Time to Daylight Savings Time 1211 # now occurs at 2:00AM. 1212 # ... 1213 # http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm 1214 # ... 1215 # MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery 1216 # Office of the Chief Information Officer 1217 # Executive Council 1218 # Government of Newfoundland & Labrador 1219 1220 Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 1221 Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S 1222 Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 1223 Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1224 Rule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D 1225 Rule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S 1226 # 1227 # St John's has an apostrophe, but Posix file names can't have apostrophes. 1228 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1229 Zone America/St_Johns -3:30:52 - LMT 1884 1230 -3:30:52 StJohns N%sT 1918 1231 -3:30:52 Canada N%sT 1919 1232 -3:30:52 StJohns N%sT 1935 Mar 30 1233 -3:30 StJohns N%sT 1942 May 11 1234 -3:30 Canada N%sT 1946 1235 -3:30 StJohns N%sT 2011 Nov 1236 -3:30 Canada N%sT 1237 1238 # most of east Labrador 1239 1240 # The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'. 1241 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1242 Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 1243 -3:30:52 - NST 1918 1244 -3:30:52 Canada N%sT 1919 1245 -3:30:52 - NST 1935 Mar 30 1246 -3:30 - NST 1936 1247 -3:30 StJohns N%sT 1942 May 11 1248 -3:30 Canada N%sT 1946 1249 -3:30 StJohns N%sT 1966 Mar 15 2:00 1250 -4:00 StJohns A%sT 2011 Nov 1251 -4:00 Canada A%sT 1252 1253 1254 # west Labrador, Nova Scotia, Prince Edward I 1255 1256 # From Paul Eggert (2006-03-22): 1257 # Shanks & Pottenger write that since 1970 most of this region has been like 1258 # Halifax. Many locales did not observe peacetime DST until 1972; 1259 # Glace Bay, NS is the largest that we know of. 1260 # Shanks & Pottenger also write that Liverpool, NS was the only town 1261 # in Canada to observe DST in 1971 but not 1970; for now we'll assume 1262 # this is a typo. 1263 1264 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1265 Rule Halifax 1916 only - Apr 1 0:00 1:00 D 1266 Rule Halifax 1916 only - Oct 1 0:00 0 S 1267 Rule Halifax 1920 only - May 9 0:00 1:00 D 1268 Rule Halifax 1920 only - Aug 29 0:00 0 S 1269 Rule Halifax 1921 only - May 6 0:00 1:00 D 1270 Rule Halifax 1921 1922 - Sep 5 0:00 0 S 1271 Rule Halifax 1922 only - Apr 30 0:00 1:00 D 1272 Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1273 Rule Halifax 1923 only - Sep 4 0:00 0 S 1274 Rule Halifax 1924 only - Sep 15 0:00 0 S 1275 Rule Halifax 1925 only - Sep 28 0:00 0 S 1276 Rule Halifax 1926 only - May 16 0:00 1:00 D 1277 Rule Halifax 1926 only - Sep 13 0:00 0 S 1278 Rule Halifax 1927 only - May 1 0:00 1:00 D 1279 Rule Halifax 1927 only - Sep 26 0:00 0 S 1280 Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1281 Rule Halifax 1928 only - Sep 9 0:00 0 S 1282 Rule Halifax 1929 only - Sep 3 0:00 0 S 1283 Rule Halifax 1930 only - Sep 15 0:00 0 S 1284 Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1285 Rule Halifax 1932 only - May 1 0:00 1:00 D 1286 Rule Halifax 1933 only - Apr 30 0:00 1:00 D 1287 Rule Halifax 1933 only - Oct 2 0:00 0 S 1288 Rule Halifax 1934 only - May 20 0:00 1:00 D 1289 Rule Halifax 1934 only - Sep 16 0:00 0 S 1290 Rule Halifax 1935 only - Jun 2 0:00 1:00 D 1291 Rule Halifax 1935 only - Sep 30 0:00 0 S 1292 Rule Halifax 1936 only - Jun 1 0:00 1:00 D 1293 Rule Halifax 1936 only - Sep 14 0:00 0 S 1294 Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1295 Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1296 Rule Halifax 1939 only - May 28 0:00 1:00 D 1297 Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1298 Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1299 Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1300 Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1301 Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1302 Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1303 Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1304 Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1305 Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S 1306 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1307 Zone America/Halifax -4:14:24 - LMT 1902 Jun 15 1308 -4:00 Halifax A%sT 1918 1309 -4:00 Canada A%sT 1919 1310 -4:00 Halifax A%sT 1942 Feb 9 2:00s 1311 -4:00 Canada A%sT 1946 1312 -4:00 Halifax A%sT 1974 1313 -4:00 Canada A%sT 1314 Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 1315 -4:00 Canada A%sT 1953 1316 -4:00 Halifax A%sT 1954 1317 -4:00 - AST 1972 1318 -4:00 Halifax A%sT 1974 1319 -4:00 Canada A%sT 1320 1321 # New Brunswick 1322 1323 # From Paul Eggert (2007-01-31): 1324 # The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 1325 # says they changed at 00:01 through 2006, and 1326 # <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1327 # clear that this was the case since at least 1993. 1328 # For now, assume it started in 1993. 1329 1330 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1331 Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1332 Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1333 Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1334 Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1335 Rule Moncton 1939 only - May 27 1:00 1:00 D 1336 Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1337 Rule Moncton 1940 only - May 19 1:00 1:00 D 1338 Rule Moncton 1941 only - May 4 1:00 1:00 D 1339 Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1340 Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1341 Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1342 Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1343 Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1344 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1345 Zone America/Moncton -4:19:08 - LMT 1883 Dec 9 1346 -5:00 - EST 1902 Jun 15 1347 -4:00 Canada A%sT 1933 1348 -4:00 Moncton A%sT 1942 1349 -4:00 Canada A%sT 1946 1350 -4:00 Moncton A%sT 1973 1351 -4:00 Canada A%sT 1993 1352 -4:00 Moncton A%sT 2007 1353 -4:00 Canada A%sT 1354 1355 # Quebec 1356 1357 # From Paul Eggert (2013-08-30): 1358 # Since 1970 most of Quebec has been like Toronto. 1359 # However, because earlier versions of the tz database mistakenly relied on data 1360 # from Shanks & Pottenger saying that Quebec differed from Ontario after 1970, 1361 # a separate entry was created for most of Quebec. We're loath to lose 1362 # its pre-1970 info, even though the tz database is normally limited to 1363 # zones that differ after 1970, so keep this otherwise out-of-scope entry. 1364 1365 # Matthews and Vincent (1998) also write that Quebec east of the -63 1366 # meridian is supposed to observe AST, but residents as far east as 1367 # Natashquan use EST/EDT, and residents east of Natashquan use AST. 1368 # The Quebec department of justice writes in 1369 # "The situation in Minganie and Basse-Côte-Nord" 1370 # http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm 1371 # that the coastal strip from just east of Natashquan to Blanc-Sablon 1372 # observes Atlantic standard time all year round. 1373 # http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en 1374 # says this common practice was codified into law as of 2007. 1375 # For lack of better info, guess this practice began around 1970, contra to 1376 # Shanks & Pottenger who have this region observing AST/ADT. 1377 1378 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1379 Rule Mont 1917 only - Mar 25 2:00 1:00 D 1380 Rule Mont 1917 only - Apr 24 0:00 0 S 1381 Rule Mont 1919 only - Mar 31 2:30 1:00 D 1382 Rule Mont 1919 only - Oct 25 2:30 0 S 1383 Rule Mont 1920 only - May 2 2:30 1:00 D 1384 Rule Mont 1920 1922 - Oct Sun>=1 2:30 0 S 1385 Rule Mont 1921 only - May 1 2:00 1:00 D 1386 Rule Mont 1922 only - Apr 30 2:00 1:00 D 1387 Rule Mont 1924 only - May 17 2:00 1:00 D 1388 Rule Mont 1924 1926 - Sep lastSun 2:30 0 S 1389 Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D 1390 Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D 1391 Rule Mont 1927 1937 - Sep lastSat 24:00 0 S 1392 Rule Mont 1938 1940 - Apr lastSun 0:00 1:00 D 1393 Rule Mont 1938 1939 - Sep lastSun 0:00 0 S 1394 Rule Mont 1946 1973 - Apr lastSun 2:00 1:00 D 1395 Rule Mont 1945 1948 - Sep lastSun 2:00 0 S 1396 Rule Mont 1949 1950 - Oct lastSun 2:00 0 S 1397 Rule Mont 1951 1956 - Sep lastSun 2:00 0 S 1398 Rule Mont 1957 1973 - Oct lastSun 2:00 0 S 1399 1400 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1401 Zone America/Blanc-Sablon -3:48:28 - LMT 1884 1402 -4:00 Canada A%sT 1970 1403 -4:00 - AST 1404 Zone America/Montreal -4:54:16 - LMT 1884 1405 -5:00 Mont E%sT 1918 1406 -5:00 Canada E%sT 1919 1407 -5:00 Mont E%sT 1942 Feb 9 2:00s 1408 -5:00 Canada E%sT 1946 1409 -5:00 Mont E%sT 1974 1410 -5:00 Canada E%sT 1411 1412 # Ontario 1413 1414 # From Paul Eggert (2006-07-09): 1415 # Shanks & Pottenger write that since 1970 most of Ontario has been like 1416 # Toronto. 1417 # Thunder Bay skipped DST in 1973. 1418 # Many smaller locales did not observe peacetime DST until 1974; 1419 # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1420 # Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 1421 1422 # From Mark Brader (2003-07-26): 1423 # [According to the Toronto Star] Orillia, Ontario, adopted DST 1424 # effective Saturday, 1912-06-22, 22:00; the article mentions that 1425 # Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1426 # have already done so. In Orillia DST was to run until Saturday, 1427 # 1912-08-31 (no time mentioned), but it was met with considerable 1428 # hostility from certain segments of the public, and was revoked after 1429 # only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but 1430 # presumably that should be -07-06. (1912-06-19, -07-12; also letters 1431 # earlier in June). 1432 # 1433 # Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1434 1435 # From Paul Eggert (1997-10-17): 1436 # Mark Brader writes that an article in the 1997-10-14 Toronto Star 1437 # says that Atikokan, Ontario currently does not observe DST, 1438 # but will vote on 11-10 whether to use EST/EDT. 1439 # He also writes that the Ontario Time Act (1990, Chapter T.9) 1440 # http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html 1441 # says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 1442 # Officially Atikokan is therefore on CST/CDT, and most likely this report 1443 # concerns a non-official time observed as a matter of local practice. 1444 # 1445 # From Paul Eggert (2000-10-02): 1446 # Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 1447 # New Osnaburgh observe CST all year, that Big Trout Lake observes 1448 # CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 1449 # violation of the official Ontario rules. 1450 # 1451 # From Paul Eggert (2006-07-09): 1452 # Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the 1453 # 2005-07-21 Chronicle-Journal, which said: 1454 # 1455 # The clocks in Atikokan stay set on standard time year-round. 1456 # This means they spend about half the time on central time and 1457 # the other half on eastern time. 1458 # 1459 # For the most part, the system works, Mayor Dennis Brown said. 1460 # 1461 # "The majority of businesses in Atikokan deal more with Eastern 1462 # Canada, but there are some that deal with Western Canada," he 1463 # said. "I don't see any changes happening here." 1464 # 1465 # Walton also writes "Supposedly Pickle Lake and Mishkeegogamang 1466 # [New Osnaburgh] follow the same practice." 1467 1468 # From Garry McKinnon (2006-07-14) via Chris Walton: 1469 # I chatted with a member of my board who has an outstanding memory 1470 # and a long history in Atikokan (and in the telecom industry) and he 1471 # can say for certain that Atikokan has been practicing the current 1472 # time keeping since 1952, at least. 1473 1474 # From Paul Eggert (2006-07-17): 1475 # Shanks & Pottenger say that Atikokan has agreed with Rainy River 1476 # ever since standard time was introduced, but the information from 1477 # McKinnon sounds more authoritative. For now, assume that Atikokan 1478 # switched to EST immediately after WWII era daylight saving time 1479 # ended. This matches the old (less-populous) America/Coral_Harbour 1480 # entry since our cutoff date of 1970, so we can move 1481 # America/Coral_Harbour to the 'backward' file. 1482 1483 # From Mark Brader (2010-03-06): 1484 # 1485 # Currently the database has: 1486 # 1487 # # Ontario 1488 # 1489 # # From Paul Eggert (2006-07-09): 1490 # # Shanks & Pottenger write that since 1970 most of Ontario has been like 1491 # # Toronto. 1492 # # Thunder Bay skipped DST in 1973. 1493 # # Many smaller locales did not observe peacetime DST until 1974; 1494 # # Nipigon (EST) and Rainy River (CST) are the largest that we know of. 1495 # 1496 # In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom 1497 # right corner of page 1, it says that Toronto will return to standard 1498 # time at 2 am Sunday morning (which agrees with the database), and that: 1499 # 1500 # The one-hour setback will go into effect throughout most of Ontario, 1501 # except in areas like Windsor which remains on standard time all year. 1502 # 1503 # Windsor is, of course, a lot larger than Nipigon. 1504 # 1505 # I only came across this incidentally. I don't know if Windsor began 1506 # observing DST when Detroit did, or in 1974, or on some other date. 1507 # 1508 # By the way, the article continues by noting that: 1509 # 1510 # Some cities in the United States have pushed the deadline back 1511 # three weeks and will change over from daylight saving in October. 1512 1513 # From Arthur David Olson (2010-07-17): 1514 # 1515 # "Standard Time and Time Zones in Canada" appeared in 1516 # The Journal of The Royal Astronomical Society of Canada, 1517 # volume 26, number 2 (February 1932) and, as of 2010-07-17, 1518 # was available at 1519 # http://adsabs.harvard.edu/full/1932JRASC..26...49S 1520 # 1521 # It includes the text below (starting on page 57): 1522 # 1523 # A list of the places in Canada using daylight saving time would 1524 # require yearly revision. From information kindly furnished by 1525 # the provincial governments and by the postmasters in many cities 1526 # and towns, it is found that the following places used daylight sav- 1527 # ing in 1930. The information for the province of Quebec is definite, 1528 # for the other provinces only approximate: 1529 # 1530 # Province Daylight saving time used 1531 # Prince Edward Island Not used. 1532 # Nova Scotia In Halifax only. 1533 # New Brunswick In St. John only. 1534 # Quebec In the following places: 1535 # Montreal Lachine 1536 # Quebec Mont-Royal 1537 # Lévis Iberville 1538 # St. Lambert Cap de la Madelèine 1539 # Verdun Loretteville 1540 # Westmount Richmond 1541 # Outremont St. Jérôme 1542 # Longueuil Greenfield Park 1543 # Arvida Waterloo 1544 # Chambly-Canton Beaulieu 1545 # Melbourne La Tuque 1546 # St. Théophile Buckingham 1547 # Ontario Used generally in the cities and towns along 1548 # the southerly part of the province. Not 1549 # used in the northwesterly part. 1550 # Manitoba Not used. 1551 # Saskatchewan In Regina only. 1552 # Alberta Not used. 1553 # British Columbia Not used. 1554 # 1555 # With some exceptions, the use of daylight saving may be said to be limited 1556 # to those cities and towns lying between Quebec city and Windsor, Ont. 1557 1558 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1559 Rule Toronto 1919 only - Mar 30 23:30 1:00 D 1560 Rule Toronto 1919 only - Oct 26 0:00 0 S 1561 Rule Toronto 1920 only - May 2 2:00 1:00 D 1562 Rule Toronto 1920 only - Sep 26 0:00 0 S 1563 Rule Toronto 1921 only - May 15 2:00 1:00 D 1564 Rule Toronto 1921 only - Sep 15 2:00 0 S 1565 Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1566 # Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1567 # was meant. 1568 Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1569 Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1570 # The 1927-to-1939 rules can be expressed more simply as 1571 # Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1572 # Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1573 # Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1574 # Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1575 # The rules below avoid use of Sun>=25 1576 # (which pre-2004 versions of zic cannot handle). 1577 Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1578 Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1579 Rule Toronto 1932 only - May 1 2:00 1:00 D 1580 Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1581 Rule Toronto 1933 only - Oct 1 2:00 0 S 1582 Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1583 Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1584 Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1585 Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1586 Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1587 Rule Toronto 1949 only - Nov lastSun 0:00 0 S 1588 Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1589 Rule Toronto 1950 only - Nov lastSun 2:00 0 S 1590 Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1591 # Shanks & Pottenger say Toronto ended DST a week early in 1971, 1592 # namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 1593 # is wrong, and that he had confirmed it by checking the 1971-10-30 1594 # Toronto Star, which said that DST was ending 1971-10-31 as usual. 1595 Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1596 1597 # From Paul Eggert (2003-07-27): 1598 # Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1599 # Port Arthur, Ontario, the principle of the Bill has been in 1600 # operation for the past three years, and in the City of Moose Jaw, 1601 # Saskatchewan, for one year." 1602 1603 # From David Bryan via Tory Tronrud, Director/Curator, 1604 # Thunder Bay Museum (2003-11-12): 1605 # There is some suggestion, however, that, by-law or not, daylight 1606 # savings time was being practiced in Fort William and Port Arthur 1607 # before 1909.... [I]n 1910, the line between the Eastern and Central 1608 # Time Zones was permanently moved about two hundred miles west to 1609 # include the Thunder Bay area.... When Canada adopted daylight 1610 # savings time in 1916, Fort William and Port Arthur, having done so 1611 # already, did not change their clocks.... During the Second World 1612 # War,... [t]he cities agreed to implement DST during the summer 1613 # months for the remainder of the war years. 1614 1615 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1616 Zone America/Toronto -5:17:32 - LMT 1895 1617 -5:00 Canada E%sT 1919 1618 -5:00 Toronto E%sT 1942 Feb 9 2:00s 1619 -5:00 Canada E%sT 1946 1620 -5:00 Toronto E%sT 1974 1621 -5:00 Canada E%sT 1622 Zone America/Thunder_Bay -5:57:00 - LMT 1895 1623 -6:00 - CST 1910 1624 -5:00 - EST 1942 1625 -5:00 Canada E%sT 1970 1626 -5:00 Toronto E%sT 1973 1627 -5:00 - EST 1974 1628 -5:00 Canada E%sT 1629 Zone America/Nipigon -5:53:04 - LMT 1895 1630 -5:00 Canada E%sT 1940 Sep 29 1631 -5:00 1:00 EDT 1942 Feb 9 2:00s 1632 -5:00 Canada E%sT 1633 Zone America/Rainy_River -6:18:16 - LMT 1895 1634 -6:00 Canada C%sT 1940 Sep 29 1635 -6:00 1:00 CDT 1942 Feb 9 2:00s 1636 -6:00 Canada C%sT 1637 Zone America/Atikokan -6:06:28 - LMT 1895 1638 -6:00 Canada C%sT 1940 Sep 29 1639 -6:00 1:00 CDT 1942 Feb 9 2:00s 1640 -6:00 Canada C%sT 1945 Sep 30 2:00 1641 -5:00 - EST 1642 1643 1644 # Manitoba 1645 1646 # From Rob Douglas (2006-04-06): 1647 # the old Manitoba Time Act - as amended by Bill 2, assented to 1648 # March 27, 1987 ... said ... 1649 # "between two o'clock Central Standard Time in the morning of 1650 # the first Sunday of April of each year and two o'clock Central 1651 # Standard Time in the morning of the last Sunday of October next 1652 # following, one hour in advance of Central Standard Time."... 1653 # I believe that the English legislation [of the old time act] had 1654 # been assented to (March 22, 1967).... 1655 # Also, as far as I can tell, there was no order-in-council varying 1656 # the time of Daylight Saving Time for 2005 and so the provisions of 1657 # the 1987 version would apply - the changeover was at 2:00 Central 1658 # Standard Time (i.e. not until 3:00 Central Daylight Time). 1659 1660 # From Paul Eggert (2006-04-10): 1661 # Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1662 # starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1663 # it was also 02:00s in 1966. 1664 1665 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1666 Rule Winn 1916 only - Apr 23 0:00 1:00 D 1667 Rule Winn 1916 only - Sep 17 0:00 0 S 1668 Rule Winn 1918 only - Apr 14 2:00 1:00 D 1669 Rule Winn 1918 only - Oct 27 2:00 0 S 1670 Rule Winn 1937 only - May 16 2:00 1:00 D 1671 Rule Winn 1937 only - Sep 26 2:00 0 S 1672 Rule Winn 1942 only - Feb 9 2:00 1:00 W # War 1673 Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 1674 Rule Winn 1945 only - Sep lastSun 2:00 0 S 1675 Rule Winn 1946 only - May 12 2:00 1:00 D 1676 Rule Winn 1946 only - Oct 13 2:00 0 S 1677 Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 1678 Rule Winn 1947 1949 - Sep lastSun 2:00 0 S 1679 Rule Winn 1950 only - May 1 2:00 1:00 D 1680 Rule Winn 1950 only - Sep 30 2:00 0 S 1681 Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 1682 Rule Winn 1951 1958 - Sep lastSun 2:00 0 S 1683 Rule Winn 1959 only - Oct lastSun 2:00 0 S 1684 Rule Winn 1960 only - Sep lastSun 2:00 0 S 1685 Rule Winn 1963 only - Apr lastSun 2:00 1:00 D 1686 Rule Winn 1963 only - Sep 22 2:00 0 S 1687 Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1688 Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1689 Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 1690 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1691 Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1692 -6:00 Winn C%sT 2006 1693 -6:00 Canada C%sT 1694 1695 1696 # Saskatchewan 1697 1698 # From Mark Brader (2003-07-26): 1699 # The first actual adoption of DST in Canada was at the municipal 1700 # level. As the [Toronto] Star put it (1912-06-07), "While people 1701 # elsewhere have long been talking of legislation to save daylight, 1702 # the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1703 # DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1704 # presumably late evening, as below), and would run until "the end of 1705 # the summer". The discrepancy between municipal time and railroad 1706 # time was noted. 1707 1708 # From Paul Eggert (2003-07-27): 1709 # Willett (1914-03) notes that DST "has been in operation ... in the 1710 # City of Moose Jaw, Saskatchewan, for one year." 1711 1712 # From Paul Eggert (2006-03-22): 1713 # Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 1714 # Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 1715 # Other western towns (e.g. Lloydminster) are like Edmonton. 1716 # Matthews and Vincent (1998) write that Denare Beach and Creighton 1717 # are like Winnipeg, in violation of Saskatchewan law. 1718 1719 # From W. Jones (1992-11-06): 1720 # The. . .below is based on information I got from our law library, the 1721 # provincial archives, and the provincial Community Services department. 1722 # A precise history would require digging through newspaper archives, and 1723 # since you didn't say what you wanted, I didn't bother. 1724 # 1725 # Saskatchewan is split by a time zone meridian (105W) and over the years 1726 # the boundary became pretty ragged as communities near it reevaluated 1727 # their affiliations in one direction or the other. In 1965 a provincial 1728 # referendum favoured legislating common time practices. 1729 # 1730 # On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 1731 # Saskatchewan 1978) was proclaimed, and established that the eastern 1732 # part of Saskatchewan would use CST year round, that districts in 1733 # northwest Saskatchewan would by default follow CST but could opt to 1734 # follow Mountain Time rules (thus 1 hour difference in the winter and 1735 # zero in the summer), and that districts in southwest Saskatchewan would 1736 # by default follow MT but could opt to follow CST. 1737 # 1738 # It took a few years for the dust to settle (I know one story of a town 1739 # on one time zone having its school in another, such that a mom had to 1740 # serve her family lunch in two shifts), but presently it seems that only 1741 # a few towns on the border with Alberta (e.g. Lloydminster) follow MT 1742 # rules any more; all other districts appear to have used CST year round 1743 # since sometime in the 1960s. 1744 1745 # From Chris Walton (2006-06-26): 1746 # The Saskatchewan time act which was last updated in 1996 is about 30 pages 1747 # long and rather painful to read. 1748 # http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 1749 1750 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1751 Rule Regina 1918 only - Apr 14 2:00 1:00 D 1752 Rule Regina 1918 only - Oct 27 2:00 0 S 1753 Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 1754 Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 1755 Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 1756 Rule Regina 1937 only - Oct Sun>=8 0:00 0 S 1757 Rule Regina 1938 only - Oct Sun>=1 0:00 0 S 1758 Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1759 Rule Regina 1942 only - Feb 9 2:00 1:00 W # War 1760 Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 1761 Rule Regina 1945 only - Sep lastSun 2:00 0 S 1762 Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 1763 Rule Regina 1946 only - Oct Sun>=8 2:00 0 S 1764 Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1765 Rule Regina 1947 1957 - Sep lastSun 2:00 0 S 1766 Rule Regina 1959 only - Apr lastSun 2:00 1:00 D 1767 Rule Regina 1959 only - Oct lastSun 2:00 0 S 1768 # 1769 Rule Swift 1957 only - Apr lastSun 2:00 1:00 D 1770 Rule Swift 1957 only - Oct lastSun 2:00 0 S 1771 Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 1772 Rule Swift 1959 only - Oct lastSun 2:00 0 S 1773 Rule Swift 1960 1961 - Sep lastSun 2:00 0 S 1774 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1775 Zone America/Regina -6:58:36 - LMT 1905 Sep 1776 -7:00 Regina M%sT 1960 Apr lastSun 2:00 1777 -6:00 - CST 1778 Zone America/Swift_Current -7:11:20 - LMT 1905 Sep 1779 -7:00 Canada M%sT 1946 Apr lastSun 2:00 1780 -7:00 Regina M%sT 1950 1781 -7:00 Swift M%sT 1972 Apr lastSun 2:00 1782 -6:00 - CST 1783 1784 1785 # Alberta 1786 1787 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1788 Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 1789 Rule Edm 1918 only - Oct 27 2:00 0 S 1790 Rule Edm 1919 only - May 27 2:00 0 S 1791 Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 1792 Rule Edm 1920 only - Oct lastSun 2:00 0 S 1793 Rule Edm 1921 1923 - Sep lastSun 2:00 0 S 1794 Rule Edm 1942 only - Feb 9 2:00 1:00 W # War 1795 Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 1796 Rule Edm 1945 only - Sep lastSun 2:00 0 S 1797 Rule Edm 1947 only - Apr lastSun 2:00 1:00 D 1798 Rule Edm 1947 only - Sep lastSun 2:00 0 S 1799 Rule Edm 1967 only - Apr lastSun 2:00 1:00 D 1800 Rule Edm 1967 only - Oct lastSun 2:00 0 S 1801 Rule Edm 1969 only - Apr lastSun 2:00 1:00 D 1802 Rule Edm 1969 only - Oct lastSun 2:00 0 S 1803 Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1804 Rule Edm 1972 2006 - Oct lastSun 2:00 0 S 1805 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1806 Zone America/Edmonton -7:33:52 - LMT 1906 Sep 1807 -7:00 Edm M%sT 1987 1808 -7:00 Canada M%sT 1809 1810 1811 # British Columbia 1812 1813 # From Paul Eggert (2006-03-22): 1814 # Shanks & Pottenger write that since 1970 most of this region has 1815 # been like Vancouver. 1816 # Dawson Creek uses MST. Much of east BC is like Edmonton. 1817 # Matthews and Vincent (1998) write that Creston is like Dawson Creek. 1818 1819 # It seems though that (re: Creston) is not entirely correct: 1820 1821 # From Chris Walton (2011-12-01): 1822 # There are two areas within the Canadian province of British Columbia 1823 # that do not currently observe daylight saving: 1824 # a) The Creston Valley (includes the town of Creston and surrounding area) 1825 # b) The eastern half of the Peace River Regional District 1826 # (includes the cities of Dawson Creek and Fort St. John) 1827 1828 # Earlier this year I stumbled across a detailed article about the time 1829 # keeping history of Creston; it was written by Tammy Hardwick who is the 1830 # manager of the Creston & District Museum. The article was written in May 2009. 1831 # http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1832 # According to the article, Creston has not changed its clocks since June 1918. 1833 # i.e. Creston has been stuck on UTC-7 for 93 years. 1834 # Dawson Creek, on the other hand, changed its clocks as recently as April 1972. 1835 1836 # Unfortunately the exact date for the time change in June 1918 remains 1837 # unknown and will be difficult to ascertain. I e-mailed Tammy a few months 1838 # ago to ask if Sunday June 2 was a reasonable guess. She said it was just 1839 # as plausible as any other date (in June). She also said that after writing 1840 # the article she had discovered another time change in 1916; this is the 1841 # subject of another article which she wrote in October 2010. 1842 # http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56 1843 1844 # Here is a summary of the three clock change events in Creston's history: 1845 # 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7) 1846 # Exact date unknown 1847 # 2. Oct 1916: switch to Pacific Standard Time (GMT-8) 1848 # Exact date in October unknown; Sunday October 1 is a reasonable guess. 1849 # 3. June 1918: switch to Pacific Daylight Time (GMT-7) 1850 # Exact date in June unknown; Sunday June 2 is a reasonable guess. 1851 # note#1: 1852 # On Oct 27/1918 when daylight saving ended in the rest of Canada, 1853 # Creston did not change its clocks. 1854 # note#2: 1855 # During WWII when the Federal Government legislated a mandatory clock change, 1856 # Creston did not oblige. 1857 # note#3: 1858 # There is no guarantee that Creston will remain on Mountain Standard Time 1859 # (UTC-7) forever. 1860 # The subject was debated at least once this year by the town Council. 1861 # http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html 1862 1863 # During a period WWII, summer time (Daylight saying) was mandatory in Canada. 1864 # In Creston, that was handled by shifting the area to PST (-8:00) then applying 1865 # summer time to cause the offset to be -7:00, the same as it had been before 1866 # the change. It can be argued that the timezone abbreviation during this 1867 # period should be PDT rather than MST, but that doesn't seem important enough 1868 # (to anyone) to further complicate the rules. 1869 1870 # The transition dates (and times) are guesses. 1871 1872 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1873 Rule Vanc 1918 only - Apr 14 2:00 1:00 D 1874 Rule Vanc 1918 only - Oct 27 2:00 0 S 1875 Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1876 Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 1877 Rule Vanc 1945 only - Sep 30 2:00 0 S 1878 Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 1879 Rule Vanc 1946 only - Oct 13 2:00 0 S 1880 Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S 1881 Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S 1882 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1883 Zone America/Vancouver -8:12:28 - LMT 1884 1884 -8:00 Vanc P%sT 1987 1885 -8:00 Canada P%sT 1886 Zone America/Dawson_Creek -8:00:56 - LMT 1884 1887 -8:00 Canada P%sT 1947 1888 -8:00 Vanc P%sT 1972 Aug 30 2:00 1889 -7:00 - MST 1890 Zone America/Creston -7:46:04 - LMT 1884 1891 -7:00 - MST 1916 Oct 1 1892 -8:00 - PST 1918 Jun 2 1893 -7:00 - MST 1894 1895 # Northwest Territories, Nunavut, Yukon 1896 1897 # From Paul Eggert (2006-03-22): 1898 # Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 1899 # Mathew Englander (1996-10-07) gives the following refs: 1900 # * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 1901 # c. 7 defines Yukon standard time as UTC-9. This is still valid; 1902 # see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 1903 # * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 1904 # * O.I.C. 1980/02 established DST. 1905 # * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 1906 # Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go 1907 # with Englander. 1908 # From Chris Walton (2006-06-26): 1909 # Here is a link to the old daylight saving portion of the interpretation 1910 # act which was last updated in 1987: 1911 # http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf 1912 1913 # From Rives McDow (1999-09-04): 1914 # Nunavut ... moved ... to incorporate the whole territory into one time zone. 1915 # Nunavut moves to single time zone Oct. 31 1916 # http://www.nunatsiaq.com/nunavut/nvt90903_13.html 1917 # 1918 # From Antoine Leca (1999-09-06): 1919 # We then need to create a new timezone for the Kitikmeot region of Nunavut 1920 # to differentiate it from the Yellowknife region. 1921 1922 # From Paul Eggert (1999-09-20): 1923 # Basic Facts: The New Territory 1924 # http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html 1925 # (1999) reports that Pangnirtung operates on eastern time, 1926 # and that Coral Harbour does not observe DST. We don't know when 1927 # Pangnirtung switched to eastern time; we'll guess 1995. 1928 1929 # From Rives McDow (1999-11-08): 1930 # On October 31, when the rest of Nunavut went to Central time, 1931 # Pangnirtung wobbled. Here is the result of their wobble: 1932 # 1933 # The following businesses and organizations in Pangnirtung use Central Time: 1934 # 1935 # First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 1936 # Eastern Arctic National Parks, A & D Specialist 1937 # 1938 # The following businesses and organizations in Pangnirtung use Eastern Time: 1939 # 1940 # Hamlet office, All other businesses, Both schools, Airport operator 1941 # 1942 # This has made for an interesting situation there, which warranted the news. 1943 # No one there that I spoke with seems concerned, or has plans to 1944 # change the local methods of keeping time, as it evidently does not 1945 # really interfere with any activities or make things difficult locally. 1946 # They plan to celebrate New Year's turn-over twice, one hour apart, 1947 # so it appears that the situation will last at least that long. 1948 # The Nunavut Intergovernmental Affairs hopes that they will "come to 1949 # their senses", but the locals evidently don't see any problem with 1950 # the current state of affairs. 1951 1952 # From Michaela Rodrigue, writing in the 1953 # Nunatsiaq News (1999-11-19): 1954 # http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html 1955 # Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 1956 # central - or Nunavut time - for government offices, and eastern time 1957 # for municipal offices and schools.... Igloolik [was similar but then] 1958 # made the switch to central time on Saturday, Nov. 6. 1959 1960 # From Paul Eggert (2000-10-02): 1961 # Matthews and Vincent (1998) say the following, but we lack histories 1962 # for these potential new Zones. 1963 # 1964 # The Canadian Forces station at Alert uses Eastern Time while the 1965 # handful of residents at the Eureka weather station [in the Central 1966 # zone] skip daylight savings. Baffin Island, which is crossed by the 1967 # Central, Eastern and Atlantic Time zones only uses Eastern Time. 1968 # Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 1969 # Central Time and Southampton Island [in the Central zone] is not 1970 # required to use daylight savings. 1971 1972 # From <http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html> 1973 # Nunavut now has two time zones (2000-11-10): 1974 # The Nunavut government would allow its employees in Kugluktuk and 1975 # Cambridge Bay to operate on central time year-round, putting them 1976 # one hour behind the rest of Nunavut for six months during the winter. 1977 # At the end of October the two communities had rebelled against 1978 # Nunavut's unified time zone, refusing to shift to eastern time with 1979 # the rest of the territory for the winter. Cambridge Bay remained on 1980 # central time, while Kugluktuk, even farther west, reverted to 1981 # mountain time, which they had used before the advent of Nunavut's 1982 # unified time zone in 1999. 1983 # 1984 # From Rives McDow (2001-01-20), quoting the Nunavut government: 1985 # The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 1986 1987 # From Paul Eggert (2000-12-04): 1988 # Let's just keep track of the official times for now. 1989 1990 # From Rives McDow (2001-03-07): 1991 # The premier of Nunavut has issued a ministerial statement advising 1992 # that effective 2001-04-01, the territory of Nunavut will revert 1993 # back to three time zones (mountain, central, and eastern). Of the 1994 # cities in Nunavut, Coral Harbor is the only one that I know of that 1995 # has said it will not observe dst, staying on EST year round. I'm 1996 # checking for more info, and will get back to you if I come up with 1997 # more. 1998 # [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 1999 2000 # From Gwillim Law (2005-05-21): 2001 # According to ... 2002 # http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 2003 # (from a 1998 Canadian Geographic article), the de facto and de jure time 2004 # for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 2005 # round. Using Google, it's easy to find other websites that confirm this. 2006 # I wasn't able to find how far back this time regimen goes, but since it 2007 # predates the creation of Nunavut, it probably goes back many years.... 2008 # The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 2009 # 2010 # From Paul Eggert (2014-10-17): 2011 # For lack of better information, assume that Southampton Island observed 2012 # daylight saving only during wartime. Gwillim Law's email also 2013 # mentioned maps now maintained by National Research Council Canada; 2014 # see above for an up-to-date link. 2015 2016 # From Chris Walton (2007-03-01): 2017 # ... the community of Resolute (located on Cornwallis Island in 2018 # Nunavut) moved from Central Time to Eastern Time last November. 2019 # Basically the community did not change its clocks at the end of 2020 # daylight saving.... 2021 # http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 2022 2023 # From Chris Walton (2011-03-21): 2024 # Back in 2007 I initiated the creation of a new "zone file" for Resolute 2025 # Bay. Resolute Bay is a small community located about 900km north of 2026 # the Arctic Circle. The zone file was required because Resolute Bay had 2027 # decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007. 2028 # 2029 # According to new information which I received last week, Resolute Bay 2030 # went back to using UTC-6 in the winter of 2007-2008... 2031 # 2032 # On March 11/2007 most of Canada went onto daylight saving. On March 2033 # 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I 2034 # talked to somebody that was both knowledgeable and helpful. I was able 2035 # to confirm that Resolute Bay was still operating on UTC-5. It was 2036 # explained to me that Resolute Bay had been on the Eastern Time zone 2037 # (EST) in the winter, and was now back on the Central Time zone (CDT). 2038 # i.e. the time zone had changed twice in the last year but the clocks 2039 # had not moved. The residents had to know which time zone they were in 2040 # so they could follow the correct TV schedule... 2041 # 2042 # On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I 2043 # phoned the Resolute Bay hamlet office...[D]ue to the challenging nature 2044 # of the phone call, I decided to seek out an alternate source of 2045 # information. I found an e-mail address for somebody by the name of 2046 # Stephanie Adams whose job was listed as "Inns North Support Officer for 2047 # Arctic Co-operatives." I was under the impression that Stephanie lived 2048 # and worked in Resolute Bay... 2049 # 2050 # On March 14/2011 I phoned the hamlet office again. I was told that 2051 # Resolute Bay had been using Central Standard Time over the winter of 2052 # 2010-2011 and that the clocks had therefore been moved one hour ahead 2053 # on March 13/2011. The person I talked to was aware that Resolute Bay 2054 # had previously experimented with Eastern Standard Time but he could not 2055 # tell me when the practice had stopped. 2056 # 2057 # On March 17/2011 I searched the Web to find an e-mail address of 2058 # somebody that might be able to tell me exactly when Resolute Bay went 2059 # off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz 2060 # used to be the mayor of Resolute Bay and he apparently owns half the 2061 # businesses including "South Camp Inn." This website has some info on 2062 # Aziz: 2063 # http://www.uphere.ca/node/493 2064 # 2065 # I sent Aziz an e-mail asking when Resolute Bay had stopped using 2066 # Eastern Standard Time. 2067 # 2068 # Aziz responded quickly with this: "hi, The time was not changed for the 2069 # 1 year only, the following year, the community went back to the old way 2070 # of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in 2071 # the winter Zulu plus 6 hrs" 2072 # 2073 # This of course conflicted with everything I had ascertained in November 2008. 2074 # 2075 # I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz 2076 # responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You 2077 # may want to check with the weather office in Resolute Bay or do a 2078 # search on the weather through Env. Canada. web site" 2079 # 2080 # If I had realized the Stephanie did not live in Resolute Bay I would 2081 # never have contacted her. I now believe that all the information I 2082 # obtained in November 2008 should be ignored... 2083 # I apologize for reporting incorrect information in 2008. 2084 2085 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2086 Rule NT_YK 1918 only - Apr 14 2:00 1:00 D 2087 Rule NT_YK 1918 only - Oct 27 2:00 0 S 2088 Rule NT_YK 1919 only - May 25 2:00 1:00 D 2089 Rule NT_YK 1919 only - Nov 1 0:00 0 S 2090 Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 2091 Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 2092 Rule NT_YK 1945 only - Sep 30 2:00 0 S 2093 Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 2094 Rule NT_YK 1965 only - Oct lastSun 2:00 0 S 2095 Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 2096 Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S 2097 Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 2098 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2099 # aka Panniqtuuq 2100 Zone America/Pangnirtung 0 - zzz 1921 # trading post est. 2101 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 2102 -5:00 Canada E%sT 1999 Oct 31 2:00 2103 -6:00 Canada C%sT 2000 Oct 29 2:00 2104 -5:00 Canada E%sT 2105 # formerly Frobisher Bay 2106 Zone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est. 2107 -5:00 NT_YK E%sT 1999 Oct 31 2:00 2108 -6:00 Canada C%sT 2000 Oct 29 2:00 2109 -5:00 Canada E%sT 2110 # aka Qausuittuq 2111 Zone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded 2112 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2113 -5:00 - EST 2001 Apr 1 3:00 2114 -6:00 Canada C%sT 2006 Oct 29 2:00 2115 -5:00 - EST 2007 Mar 11 3:00 2116 -6:00 Canada C%sT 2117 # aka Kangiqiniq 2118 Zone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded 2119 -6:00 NT_YK C%sT 2000 Oct 29 2:00 2120 -5:00 - EST 2001 Apr 1 3:00 2121 -6:00 Canada C%sT 2122 # aka Iqaluktuuttiaq 2123 Zone America/Cambridge_Bay 0 - zzz 1920 # trading post est.? 2124 -7:00 NT_YK M%sT 1999 Oct 31 2:00 2125 -6:00 Canada C%sT 2000 Oct 29 2:00 2126 -5:00 - EST 2000 Nov 5 0:00 2127 -6:00 - CST 2001 Apr 1 3:00 2128 -7:00 Canada M%sT 2129 Zone America/Yellowknife 0 - zzz 1935 # Yellowknife founded? 2130 -7:00 NT_YK M%sT 1980 2131 -7:00 Canada M%sT 2132 Zone America/Inuvik 0 - zzz 1953 # Inuvik founded 2133 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 2134 -7:00 NT_YK M%sT 1980 2135 -7:00 Canada M%sT 2136 Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 2137 -9:00 NT_YK Y%sT 1966 Jul 1 2:00 2138 -8:00 NT_YK P%sT 1980 2139 -8:00 Canada P%sT 2140 Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 2141 -9:00 NT_YK Y%sT 1973 Oct 28 0:00 2142 -8:00 NT_YK P%sT 1980 2143 -8:00 Canada P%sT 2144 2145 2146 ############################################################################### 2147 2148 # Mexico 2149 2150 # From Paul Eggert (2001-03-05): 2151 # The Investigation and Analysis Service of the 2152 # Mexican Library of Congress (MLoC) has published a 2153 # history of Mexican local time (in Spanish) 2154 # http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/ 2155 # 2156 # Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 2157 # (In all cases we go with the MLoC.) 2158 # S&P report that Baja was at -8:00 in 1922/1923. 2159 # S&P say the 1930 transition in Baja was 1930-11-16. 2160 # S&P report no DST during summer 1931. 2161 # S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 2162 2163 # From Gwillim Law (2001-02-20): 2164 # There are some other discrepancies between the Decrees page and the 2165 # tz database. I think they can best be explained by supposing that 2166 # the researchers who prepared the Decrees page failed to find some of 2167 # the relevant documents. 2168 2169 # From Alan Perry (1996-02-15): 2170 # A guy from our Mexico subsidiary finally found the Presidential Decree 2171 # outlining the timezone changes in Mexico. 2172 # 2173 # ------------- Begin Forwarded Message ------------- 2174 # 2175 # I finally got my hands on the Official Presidential Decree that sets up the 2176 # rules for the DST changes. The rules are: 2177 # 2178 # 1. The country is divided in 3 timezones: 2179 # - Baja California Norte (the Mexico/BajaNorte TZ) 2180 # - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 2181 # - The rest of the country (the Mexico/General TZ) 2182 # 2183 # 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 2184 # at 2:00 AM, the times in each zone are as follows: 2185 # BajaNorte: GMT+7 2186 # BajaSur: GMT+6 2187 # General: GMT+5 2188 # 2189 # 3. The rest of the year, the times are as follows: 2190 # BajaNorte: GMT+8 2191 # BajaSur: GMT+7 2192 # General: GMT+6 2193 # 2194 # The Decree was published in Mexico's Official Newspaper on January 4th. 2195 # 2196 # -------------- End Forwarded Message -------------- 2197 # From Paul Eggert (1996-06-12): 2198 # For an English translation of the decree, see 2199 # "Diario Oficial: Time Zone Changeover" (1996-01-04). 2200 # http://mexico-travel.com/extra/timezone_eng.html 2201 2202 # From Rives McDow (1998-10-08): 2203 # The State of Quintana Roo has reverted back to central STD and DST times 2204 # (i.e. UTC -0600 and -0500 as of 1998-08-02). 2205 2206 # From Rives McDow (2000-01-10): 2207 # Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 2208 # zone 5 hours from the International Date Line, and will not observe daylight 2209 # savings time so as to stay on the same time zone as the southern part of 2210 # Arizona year round. 2211 2212 # From Jesper Nørgaard, translating 2213 # <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 2214 # In Oaxaca, the 55.000 teachers from the Section 22 of the National 2215 # Syndicate of Education Workers, refuse to apply daylight saving each 2216 # year, so that the more than 10,000 schools work at normal hour the 2217 # whole year. 2218 2219 # From Gwillim Law (2001-01-19): 2220 # <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 2221 # (translated):... 2222 # January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 2223 # that Summer Time will be reduced from seven to five months, starting 2224 # this year.... 2225 # http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001 2226 # [translated], says "summer time will ... take effect on the first Sunday 2227 # in May, and end on the last Sunday of September. 2228 2229 # From Arthur David Olson (2001-01-25): 2230 # The 2001-01-24 traditional Washington Post contained the page one 2231 # story "Timely Issue Divides Mexicans."... 2232 # http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 2233 # ... Mexico City Mayor López Obrador "...is threatening to keep 2234 # Mexico City and its 20 million residents on a different time than 2235 # the rest of the country..." In particular, López Obrador would abolish 2236 # observation of Daylight Saving Time. 2237 2238 # Official statute published by the Energy Department 2239 # http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre 2240 # (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 2241 # and Sonora with no DST. This was reported by Jesper Nørgaard (2001-02-03). 2242 2243 # From Paul Eggert (2001-03-03): 2244 # 2245 # http://www.latimes.com/news/nation/20010303/t000018766.html 2246 # James F. Smith writes in today's LA Times 2247 # * Sonora will continue to observe standard time. 2248 # * Last week Mexico City's mayor Andrés Manuel López Obrador decreed that 2249 # the Federal District will not adopt DST. 2250 # * 4 of 16 district leaders announced they'll ignore the decree. 2251 # * The decree does not affect federal-controlled facilities including 2252 # the airport, banks, hospitals, and schools. 2253 # 2254 # For now we'll assume that the Federal District will bow to federal rules. 2255 2256 # From Jesper Nørgaard (2001-04-01): 2257 # I found some references to the Mexican application of daylight 2258 # saving, which modifies what I had already sent you, stating earlier 2259 # that a number of northern Mexican states would go on daylight 2260 # saving. The modification reverts this to only cover Baja California 2261 # (Norte), while all other states (except Sonora, who has no daylight 2262 # saving all year) will follow the original decree of president 2263 # Vicente Fox, starting daylight saving May 6, 2001 and ending 2264 # September 30, 2001. 2265 # References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp> 2266 # Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 2267 2268 # From Reuters (2001-09-04): 2269 # Mexico's Supreme Court on Tuesday declared that daylight savings was 2270 # unconstitutional in Mexico City, creating the possibility the 2271 # capital will be in a different time zone from the rest of the nation 2272 # next year.... The Supreme Court's ruling takes effect at 2:00 2273 # a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 2274 # standard time. "This is so residents of the Federal District are not 2275 # subject to unexpected time changes," a statement from the court said. 2276 2277 # From Jesper Nørgaard Welen (2002-03-12): 2278 # ... consulting my local grocery store(!) and my coworkers, they all insisted 2279 # that a new decision had been made to reinstate US style DST in Mexico.... 2280 # http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 2281 # confirms this. Sonora as usual is the only state where DST is not applied. 2282 2283 # From Steffen Thorsen (2009-12-28): 2284 # 2285 # Steffen Thorsen wrote: 2286 # > Mexico's House of Representatives has approved a proposal for northern 2287 # > Mexico's border cities to share the same daylight saving schedule as 2288 # > the United States. 2289 # Now this has passed both the Congress and the Senate, so starting from 2290 # 2010, some border regions will be the same: 2291 # http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ 2292 # http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 2293 # (Spanish) 2294 # 2295 # Could not find the new law text, but the proposed law text changes are here: 2296 # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf 2297 # (Gaceta Parlamentaria) 2298 # 2299 # There is also a list of the votes here: 2300 # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html 2301 # 2302 # Our page: 2303 # http://www.timeanddate.com/news/time/north-mexico-dst-change.html 2304 2305 # From Arthur David Olson (2010-01-20): 2306 # The page 2307 # http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2308 # includes this text: 2309 # En los municipios fronterizos de Tijuana y Mexicali en Baja California; 2310 # Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila; 2311 # Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en 2312 # Tamaulipas, la aplicación de este horario estacional surtirá efecto 2313 # desde las dos horas del segundo domingo de marzo y concluirá a las dos 2314 # horas del primer domingo de noviembre. 2315 # En los municipios fronterizos que se encuentren ubicados en la franja 2316 # fronteriza norte en el territorio comprendido entre la línea 2317 # internacional y la línea paralela ubicada a una distancia de veinte 2318 # kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el 2319 # interior del país, la aplicación de este horario estacional surtirá 2320 # efecto desde las dos horas del segundo domingo de marzo y concluirá a 2321 # las dos horas del primer domingo de noviembre. 2322 2323 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2324 Rule Mexico 1939 only - Feb 5 0:00 1:00 D 2325 Rule Mexico 1939 only - Jun 25 0:00 0 S 2326 Rule Mexico 1940 only - Dec 9 0:00 1:00 D 2327 Rule Mexico 1941 only - Apr 1 0:00 0 S 2328 Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War 2329 Rule Mexico 1944 only - May 1 0:00 0 S 2330 Rule Mexico 1950 only - Feb 12 0:00 1:00 D 2331 Rule Mexico 1950 only - Jul 30 0:00 0 S 2332 Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 2333 Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S 2334 Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D 2335 Rule Mexico 2001 only - Sep lastSun 2:00 0 S 2336 Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 2337 Rule Mexico 2002 max - Oct lastSun 2:00 0 S 2338 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2339 # Quintana Roo; represented by Cancún 2340 Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 2341 -6:00 - CST 1981 Dec 23 2342 -5:00 Mexico E%sT 1998 Aug 2 2:00 2343 -6:00 Mexico C%sT 2344 # Campeche, Yucatán; represented by Mérida 2345 Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 2346 -6:00 - CST 1981 Dec 23 2347 -5:00 - EST 1982 Dec 2 2348 -6:00 Mexico C%sT 2349 # Coahuila, Durango, Nuevo León, Tamaulipas (near US border) 2350 Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 2351 -6:00 - CST 1988 2352 -6:00 US C%sT 1989 2353 -6:00 Mexico C%sT 2010 2354 -6:00 US C%sT 2355 # Coahuila, Durango, Nuevo León, Tamaulipas (away from US border) 2356 Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 2357 -6:00 - CST 1988 2358 -6:00 US C%sT 1989 2359 -6:00 Mexico C%sT 2360 # Central Mexico 2361 Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 2362 -7:00 - MST 1927 Jun 10 23:00 2363 -6:00 - CST 1930 Nov 15 2364 -7:00 - MST 1931 May 1 23:00 2365 -6:00 - CST 1931 Oct 2366 -7:00 - MST 1932 Apr 1 2367 -6:00 Mexico C%sT 2001 Sep 30 2:00 2368 -6:00 - CST 2002 Feb 20 2369 -6:00 Mexico C%sT 2370 # Chihuahua (near US border) 2371 Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 2372 -7:00 - MST 1927 Jun 10 23:00 2373 -6:00 - CST 1930 Nov 15 2374 -7:00 - MST 1931 May 1 23:00 2375 -6:00 - CST 1931 Oct 2376 -7:00 - MST 1932 Apr 1 2377 -6:00 - CST 1996 2378 -6:00 Mexico C%sT 1998 2379 -6:00 - CST 1998 Apr Sun>=1 3:00 2380 -7:00 Mexico M%sT 2010 2381 -7:00 US M%sT 2382 # Chihuahua (away from US border) 2383 Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 2384 -7:00 - MST 1927 Jun 10 23:00 2385 -6:00 - CST 1930 Nov 15 2386 -7:00 - MST 1931 May 1 23:00 2387 -6:00 - CST 1931 Oct 2388 -7:00 - MST 1932 Apr 1 2389 -6:00 - CST 1996 2390 -6:00 Mexico C%sT 1998 2391 -6:00 - CST 1998 Apr Sun>=1 3:00 2392 -7:00 Mexico M%sT 2393 # Sonora 2394 Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 2395 -7:00 - MST 1927 Jun 10 23:00 2396 -6:00 - CST 1930 Nov 15 2397 -7:00 - MST 1931 May 1 23:00 2398 -6:00 - CST 1931 Oct 2399 -7:00 - MST 1932 Apr 1 2400 -6:00 - CST 1942 Apr 24 2401 -7:00 - MST 1949 Jan 14 2402 -8:00 - PST 1970 2403 -7:00 Mexico M%sT 1999 2404 -7:00 - MST 2405 2406 # From Alexander Krivenyshev (2010-04-21): 2407 # According to news, Bahía de Banderas (Mexican state of Nayarit) 2408 # changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to 2409 # share the same time zone as nearby city Puerto Vallarta, Jalisco). 2410 # 2411 # (Spanish) 2412 # Bahía de Banderas homologa su horario al del centro del 2413 # país, a partir de este domingo 2414 # http://www.nayarit.gob.mx/notes.asp?id=20748 2415 # 2416 # Bahía de Banderas homologa su horario con el del Centro del 2417 # País 2418 # 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 2419 # 2420 # (English) 2421 # Puerto Vallarta and Bahía de Banderas: One Time Zone 2422 # http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml 2423 # http://www.worldtimezone.com/dst_news/dst_news_mexico08.html 2424 # 2425 # "Mexico's Senate approved the amendments to the Mexican Schedule System that 2426 # will allow Bahía de Banderas and Puerto Vallarta to share the same time 2427 # zone ..." 2428 # Baja California Sur, Nayarit, Sinaloa 2429 2430 # From Arthur David Olson (2010-05-01): 2431 # Use "Bahia_Banderas" to keep the name to fourteen characters. 2432 2433 # Mazatlán 2434 Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 2435 -7:00 - MST 1927 Jun 10 23:00 2436 -6:00 - CST 1930 Nov 15 2437 -7:00 - MST 1931 May 1 23:00 2438 -6:00 - CST 1931 Oct 2439 -7:00 - MST 1932 Apr 1 2440 -6:00 - CST 1942 Apr 24 2441 -7:00 - MST 1949 Jan 14 2442 -8:00 - PST 1970 2443 -7:00 Mexico M%sT 2444 2445 # Bahía de Banderas 2446 Zone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 2447 -7:00 - MST 1927 Jun 10 23:00 2448 -6:00 - CST 1930 Nov 15 2449 -7:00 - MST 1931 May 1 23:00 2450 -6:00 - CST 1931 Oct 2451 -7:00 - MST 1932 Apr 1 2452 -6:00 - CST 1942 Apr 24 2453 -7:00 - MST 1949 Jan 14 2454 -8:00 - PST 1970 2455 -7:00 Mexico M%sT 2010 Apr 4 2:00 2456 -6:00 Mexico C%sT 2457 2458 # Baja California (near US border) 2459 Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 2460 -7:00 - MST 1924 2461 -8:00 - PST 1927 Jun 10 23:00 2462 -7:00 - MST 1930 Nov 15 2463 -8:00 - PST 1931 Apr 1 2464 -8:00 1:00 PDT 1931 Sep 30 2465 -8:00 - PST 1942 Apr 24 2466 -8:00 1:00 PWT 1945 Aug 14 23:00u 2467 -8:00 1:00 PPT 1945 Nov 12 # Peace 2468 -8:00 - PST 1948 Apr 5 2469 -8:00 1:00 PDT 1949 Jan 14 2470 -8:00 - PST 1954 2471 -8:00 CA P%sT 1961 2472 -8:00 - PST 1976 2473 -8:00 US P%sT 1996 2474 -8:00 Mexico P%sT 2001 2475 -8:00 US P%sT 2002 Feb 20 2476 -8:00 Mexico P%sT 2010 2477 -8:00 US P%sT 2478 # Baja California (away from US border) 2479 Zone America/Santa_Isabel -7:39:28 - LMT 1922 Jan 1 0:20:32 2480 -7:00 - MST 1924 2481 -8:00 - PST 1927 Jun 10 23:00 2482 -7:00 - MST 1930 Nov 15 2483 -8:00 - PST 1931 Apr 1 2484 -8:00 1:00 PDT 1931 Sep 30 2485 -8:00 - PST 1942 Apr 24 2486 -8:00 1:00 PWT 1945 Aug 14 23:00u 2487 -8:00 1:00 PPT 1945 Nov 12 # Peace 2488 -8:00 - PST 1948 Apr 5 2489 -8:00 1:00 PDT 1949 Jan 14 2490 -8:00 - PST 1954 2491 -8:00 CA P%sT 1961 2492 -8:00 - PST 1976 2493 -8:00 US P%sT 1996 2494 -8:00 Mexico P%sT 2001 2495 -8:00 US P%sT 2002 Feb 20 2496 -8:00 Mexico P%sT 2497 # From Paul Eggert (2006-03-22): 2498 # Formerly there was an America/Ensenada zone, which differed from 2499 # America/Tijuana only in that it did not observe DST from 1976 2500 # through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2501 # Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 2502 # that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and 2503 # Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 2504 # DST-observance was a town-by-town matter back then. This concerns 2505 # data after 1970 so most likely there should be at least one Zone 2506 # other than America/Tijuana for Baja, but it's not clear yet what its 2507 # name or contents should be. 2508 # 2509 # Revillagigedo Is 2510 # no information 2511 2512 ############################################################################### 2513 2514 # Anguilla 2515 # See America/Port_of_Spain. 2516 2517 # Antigua and Barbuda 2518 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2519 Zone America/Antigua -4:07:12 - LMT 1912 Mar 2 2520 -5:00 - EST 1951 2521 -4:00 - AST 2522 2523 # Bahamas 2524 # 2525 # For 1899 Milne gives -5:09:29.5; round that. 2526 # 2527 # From Sue Williams (2006-12-07): 2528 # The Bahamas announced about a month ago that they plan to change their DST 2529 # rules to sync with the U.S. starting in 2007.... 2530 # http://www.jonesbahamas.com/?c=45&a=10412 2531 2532 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2533 Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S 2534 Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D 2535 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2536 Zone America/Nassau -5:09:30 - LMT 1912 Mar 2 2537 -5:00 Bahamas E%sT 1976 2538 -5:00 US E%sT 2539 2540 # Barbados 2541 2542 # For 1899 Milne gives -3:58:29.2; round that. 2543 2544 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2545 Rule Barb 1977 only - Jun 12 2:00 1:00 D 2546 Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 2547 Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 2548 Rule Barb 1979 only - Sep 30 2:00 0 S 2549 Rule Barb 1980 only - Sep 25 2:00 0 S 2550 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2551 Zone America/Barbados -3:58:29 - LMT 1924 # Bridgetown 2552 -3:58:29 - BMT 1932 # Bridgetown Mean Time 2553 -4:00 Barb A%sT 2554 2555 # Belize 2556 # Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. 2557 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2558 Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 2559 Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 2560 Rule Belize 1973 only - Dec 5 0:00 1:00 D 2561 Rule Belize 1974 only - Feb 9 0:00 0 S 2562 Rule Belize 1982 only - Dec 18 0:00 1:00 D 2563 Rule Belize 1983 only - Feb 12 0:00 0 S 2564 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2565 Zone America/Belize -5:52:48 - LMT 1912 Apr 2566 -6:00 Belize C%sT 2567 2568 # Bermuda 2569 2570 # For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower, 2571 # Bermuda dockyard, Ireland I; round that. 2572 2573 # From Dan Jones, reporting in The Royal Gazette (2006-06-26): 2574 2575 # Next year, however, clocks in the US will go forward on the second Sunday 2576 # in March, until the first Sunday in November. And, after the Time Zone 2577 # (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 2578 # Friday, the same thing will happen in Bermuda. 2579 # http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 2580 2581 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2582 Zone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton 2583 -4:00 - AST 1974 Apr 28 2:00 2584 -4:00 Canada A%sT 1976 2585 -4:00 US A%sT 2586 2587 # Cayman Is 2588 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2589 Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown 2590 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 2591 -5:00 - EST 2592 2593 # Costa Rica 2594 2595 # Milne gives -5:36:13.3 as San José mean time; round to nearest. 2596 2597 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2598 Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D 2599 Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S 2600 Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 2601 # IATA SSIM (1991-09) says the following was at 1:00; 2602 # go with Shanks & Pottenger. 2603 Rule CR 1991 only - Jul 1 0:00 0 S 2604 Rule CR 1992 only - Mar 15 0:00 0 S 2605 # There are too many San Josés elsewhere, so we'll use 'Costa Rica'. 2606 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2607 Zone America/Costa_Rica -5:36:13 - LMT 1890 # San José 2608 -5:36:13 - SJMT 1921 Jan 15 # San José Mean Time 2609 -6:00 CR C%sT 2610 # Coco 2611 # no information; probably like America/Costa_Rica 2612 2613 # Cuba 2614 2615 # From Paul Eggert (2013-02-21): 2616 # Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57 2617 # for the port, and -5:30 for meteorological observations. 2618 # For now, stick with Shanks & Pottenger. 2619 2620 # From Arthur David Olson (1999-03-29): 2621 # The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 2622 # the Cuban National Team and the Baltimore Orioles was carried live on 2623 # the Orioles Radio Network, including affiliate WTOP in Washington, DC. 2624 # During the game, play-by-play announcer Jim Hunter noted that 2625 # "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 2626 # Time today." (The "two hour" remark referred to losing one hour of 2627 # sleep on 1999-03-28 - when the announcers were in Cuba as it switched 2628 # to DST - and one more hour on 1999-04-04 - when the announcers will have 2629 # returned to Baltimore, which switches on that date.) 2630 2631 # From Steffen Thorsen (2013-11-11): 2632 # DST start in Cuba in 2004 ... does not follow the same rules as the 2633 # years before. The correct date should be Sunday 2004-03-28 00:00 ... 2634 # https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html 2635 2636 # From Evert van der Veer via Steffen Thorsen (2004-10-28): 2637 # Cuba is not going back to standard time this year. 2638 # From Paul Eggert (2006-03-22): 2639 # http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 2640 # says that it's due to a problem at the Antonio Guiteras 2641 # thermoelectric plant, and says "This October there will be no return 2642 # to normal hours (after daylight saving time)". 2643 # For now, let's assume that it's a temporary measure. 2644 2645 # From Carlos A. Carnero Delgado (2005-11-12): 2646 # This year (just like in 2004-2005) there's no change in time zone 2647 # adjustment in Cuba. We will stay in daylight saving time: 2648 # http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 2649 2650 # From Jesper Nørgaard Welen (2006-10-21): 2651 # An article in GRANMA INTERNACIONAL claims that Cuba will end 2652 # the 3 years of permanent DST next weekend, see 2653 # http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 2654 # "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 2655 # watches should be set back one hour - going back to 00:00 hours - returning 2656 # to the normal schedule.... 2657 2658 # From Paul Eggert (2007-03-02): 2659 # <http://www.granma.cubaweb.cu/english/news/art89.html>, dated yesterday, 2660 # says Cuban clocks will advance at midnight on March 10. 2661 # For lack of better information, assume Cuba will use US rules, 2662 # except that it switches at midnight standard time as usual. 2663 # 2664 # From Steffen Thorsen (2007-10-25): 2665 # Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week 2666 # earlier - on the last Sunday of October, just like in 2006. 2667 # 2668 # He supplied these references: 2669 # 2670 # http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES 2671 # http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm 2672 # 2673 # From Alex Krivenyshev (2007-10-25): 2674 # Here is also article from Granma (Cuba): 2675 # 2676 # Regirá el Horario Normal desde el próximo domingo 28 de octubre 2677 # http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html 2678 # 2679 # http://www.worldtimezone.com/dst_news/dst_news_cuba03.html 2680 2681 # From Arthur David Olson (2008-03-09): 2682 # I'm in Maryland which is now observing United States Eastern Daylight 2683 # Time. At 9:44 local time I used RealPlayer to listen to 2684 # http://media.enet.cu/radioreloj 2685 # a Cuban information station, and heard 2686 # the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), 2687 # indicating that Cuba is still on standard time. 2688 2689 # From Steffen Thorsen (2008-03-12): 2690 # It seems that Cuba will start DST on Sunday, 2007-03-16... 2691 # It was announced yesterday, according to this source (in Spanish): 2692 # http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm 2693 # 2694 # Some more background information is posted here: 2695 # http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html 2696 # 2697 # The article also says that Cuba has been observing DST since 1963, 2698 # while Shanks (and tzdata) has 1965 as the first date (except in the 2699 # 1940's). Many other web pages in Cuba also claim that it has been 2700 # observed since 1963, but with the exception of 1970 - an exception 2701 # which is not present in tzdata/Shanks. So there is a chance we need to 2702 # change some historic records as well. 2703 # 2704 # One example: 2705 # http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm 2706 2707 # From Jesper Nørgaard Welen (2008-03-13): 2708 # The Cuban time change has just been confirmed on the most authoritative 2709 # web site, the Granma. Please check out 2710 # http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html 2711 # 2712 # Basically as expected after Steffen Thorsen's information, the change 2713 # will take place midnight between Saturday and Sunday. 2714 2715 # From Arthur David Olson (2008-03-12): 2716 # Assume Sun>=15 (third Sunday) going forward. 2717 2718 # From Alexander Krivenyshev (2009-03-04) 2719 # According to the Radio Reloj - Cuba will start Daylight Saving Time on 2720 # midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- 2721 # not on midnight March 14 / March 15 as previously thought. 2722 # 2723 # http://www.worldtimezone.com/dst_news/dst_news_cuba05.html 2724 # (in Spanish) 2725 2726 # From Arthur David Olson (2009-03-09) 2727 # I listened over the Internet to 2728 # http://media.enet.cu/readioreloj 2729 # this morning; when it was 10:05 a. m. here in Bethesda, Maryland the 2730 # the time was announced as "diez cinco" - the same time as here, indicating 2731 # that has indeed switched to DST. Assume second Sunday from 2009 forward. 2732 2733 # From Steffen Thorsen (2011-03-08): 2734 # Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00 2735 # this year. Nothing about the end date known so far (if that has 2736 # changed at all). 2737 # 2738 # Source: 2739 # http://granma.co.cu/2011/03/08/nacional/artic01.html 2740 # 2741 # Our info: 2742 # http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html 2743 # 2744 # From Steffen Thorsen (2011-10-30) 2745 # Cuba will end DST two weeks later this year. Instead of going back 2746 # tonight, it has been delayed to 2011-11-13 at 01:00. 2747 # 2748 # One source (Spanish) 2749 # http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html 2750 # 2751 # Our page: 2752 # http://www.timeanddate.com/news/time/cuba-time-changes-2011.html 2753 # 2754 # From Steffen Thorsen (2012-03-01) 2755 # According to Radio Reloj, Cuba will start DST on Midnight between March 2756 # 31 and April 1. 2757 # 2758 # Radio Reloj has the following info (Spanish): 2759 # http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril 2760 # 2761 # Our info on it: 2762 # http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html 2763 2764 # From Steffen Thorsen (2012-11-03): 2765 # Radio Reloj and many other sources report that Cuba is changing back 2766 # to standard time on 2012-11-04: 2767 # http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre 2768 # From Paul Eggert (2012-11-03): 2769 # For now, assume the future rule is first Sunday in November. 2770 2771 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2772 Rule Cuba 1928 only - Jun 10 0:00 1:00 D 2773 Rule Cuba 1928 only - Oct 10 0:00 0 S 2774 Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 2775 Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 2776 Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 2777 Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 2778 Rule Cuba 1965 only - Jun 1 0:00 1:00 D 2779 Rule Cuba 1965 only - Sep 30 0:00 0 S 2780 Rule Cuba 1966 only - May 29 0:00 1:00 D 2781 Rule Cuba 1966 only - Oct 2 0:00 0 S 2782 Rule Cuba 1967 only - Apr 8 0:00 1:00 D 2783 Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 2784 Rule Cuba 1968 only - Apr 14 0:00 1:00 D 2785 Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 2786 Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S 2787 Rule Cuba 1972 1974 - Oct 8 0:00 0 S 2788 Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S 2789 Rule Cuba 1978 only - May 7 0:00 1:00 D 2790 Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 2791 Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 2792 Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 2793 Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 2794 Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 2795 Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 2796 Rule Cuba 1996 only - Oct 6 0:00s 0 S 2797 Rule Cuba 1997 only - Oct 12 0:00s 0 S 2798 Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 2799 Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 2800 Rule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D 2801 Rule Cuba 2004 only - Mar lastSun 0:00s 1:00 D 2802 Rule Cuba 2006 2010 - Oct lastSun 0:00s 0 S 2803 Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D 2804 Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D 2805 Rule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D 2806 Rule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D 2807 Rule Cuba 2011 only - Nov 13 0:00s 0 S 2808 Rule Cuba 2012 only - Apr 1 0:00s 1:00 D 2809 Rule Cuba 2012 max - Nov Sun>=1 0:00s 0 S 2810 Rule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D 2811 2812 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2813 Zone America/Havana -5:29:28 - LMT 1890 2814 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 2815 -5:00 Cuba C%sT 2816 2817 # Dominica 2818 # See America/Port_of_Spain. 2819 2820 # Dominican Republic 2821 2822 # From Steffen Thorsen (2000-10-30): 2823 # Enrique Morales reported to me that the Dominican Republic has changed the 2824 # time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 2825 # http://www.listin.com.do/antes/261000/republica/princi.html 2826 2827 # From Paul Eggert (2000-12-04): 2828 # That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 2829 2830 # From Rives McDow (2000-12-01): 2831 # Dominican Republic changed its mind and presidential decree on Tuesday, 2832 # November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 2833 # Dominican Republic will be reverting to 8 hours from the International Date 2834 # Line, and will not be using DST in the foreseeable future. The reason they 2835 # decided to use DST was to be in synch with Puerto Rico, who was also going 2836 # to implement DST. When Puerto Rico didn't implement DST, the president 2837 # decided to revert. 2838 2839 2840 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2841 Rule DR 1966 only - Oct 30 0:00 1:00 D 2842 Rule DR 1967 only - Feb 28 0:00 0 S 2843 Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 2844 Rule DR 1970 only - Feb 21 0:00 0 S 2845 Rule DR 1971 only - Jan 20 0:00 0 S 2846 Rule DR 1972 1974 - Jan 21 0:00 0 S 2847 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2848 Zone America/Santo_Domingo -4:39:36 - LMT 1890 2849 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 2850 -5:00 DR E%sT 1974 Oct 27 2851 -4:00 - AST 2000 Oct 29 2:00 2852 -5:00 US E%sT 2000 Dec 3 1:00 2853 -4:00 - AST 2854 2855 # El Salvador 2856 2857 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2858 Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 2859 Rule Salv 1987 1988 - Sep lastSun 0:00 0 S 2860 # There are too many San Salvadors elsewhere, so use America/El_Salvador 2861 # instead of America/San_Salvador. 2862 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2863 Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 2864 -6:00 Salv C%sT 2865 2866 # Grenada 2867 # Guadeloupe 2868 # St Barthélemy 2869 # St Martin (French part) 2870 # See America/Port_of_Spain. 2871 2872 # Guatemala 2873 # 2874 # From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 2875 # Diario Co Latino, at 2876 # <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>, 2877 # says in an article dated 2006-04-19 that the Guatemalan government had 2878 # decided on that date to advance official time by 60 minutes, to lessen the 2879 # impact of the elevated cost of oil.... Daylight saving time will last from 2880 # 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 2881 # From Paul Eggert (2006-06-22): 2882 # The Ministry of Energy and Mines, press release CP-15/2006 2883 # (2006-04-19), says DST ends at 24:00. See 2884 # http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf 2885 2886 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2887 Rule Guat 1973 only - Nov 25 0:00 1:00 D 2888 Rule Guat 1974 only - Feb 24 0:00 0 S 2889 Rule Guat 1983 only - May 21 0:00 1:00 D 2890 Rule Guat 1983 only - Sep 22 0:00 0 S 2891 Rule Guat 1991 only - Mar 23 0:00 1:00 D 2892 Rule Guat 1991 only - Sep 7 0:00 0 S 2893 Rule Guat 2006 only - Apr 30 0:00 1:00 D 2894 Rule Guat 2006 only - Oct 1 0:00 0 S 2895 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2896 Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5 2897 -6:00 Guat C%sT 2898 2899 # Haiti 2900 # From Gwillim Law (2005-04-15): 2901 # Risto O. Nykänen wrote me that Haiti is now on DST. 2902 # I searched for confirmation, and I found a press release 2903 # on the Web page of the Haitian Consulate in Chicago (2005-03-31), 2904 # <http://www.haitianconsulate.org/time.doc>. Translated from French, it says: 2905 # 2906 # "The Prime Minister's Communication Office notifies the public in general 2907 # and the press in particular that, following a decision of the Interior 2908 # Ministry and the Territorial Collectivities [I suppose that means the 2909 # provinces], Haiti will move to Eastern Daylight Time in the night from next 2910 # Saturday the 2nd to Sunday the 3rd. 2911 # 2912 # "Consequently, the Prime Minister's Communication Office wishes to inform 2913 # the population that the country's clocks will be set forward one hour 2914 # starting at midnight. This provision will hold until the last Saturday in 2915 # October 2005. 2916 # 2917 # "Port-au-Prince, March 31, 2005" 2918 # 2919 # From Steffen Thorsen (2006-04-04): 2920 # I have been informed by users that Haiti observes DST this year like 2921 # last year, so the current "only" rule for 2005 might be changed to a 2922 # "max" rule or to last until 2006. (Who knows if they will observe DST 2923 # next year or if they will extend their DST like US/Canada next year). 2924 # 2925 # I have found this article about it (in French): 2926 # http://www.haitipressnetwork.com/news.cfm?articleID=7612 2927 # 2928 # The reason seems to be an energy crisis. 2929 2930 # From Stephen Colebourne (2007-02-22): 2931 # Some IATA info: Haiti won't be having DST in 2007. 2932 2933 # From Steffen Thorsen (2012-03-11): 2934 # According to several news sources, Haiti will observe DST this year, 2935 # apparently using the same start and end date as USA/Canada. 2936 # So this means they have already changed their time. 2937 # 2938 # http://www.alterpresse.org/spip.php?article12510 2939 # http://radiovision2000haiti.net/home/?p=13253 2940 # 2941 # From Arthur David Olson (2012-03-11): 2942 # The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to 2943 # 3:00 a.m. rather than the traditional Haitian jump at midnight. 2944 # Assume a US-style fall back as well. 2945 2946 # From Steffen Thorsen (2013-03-10): 2947 # It appears that Haiti is observing DST this year as well, same rules 2948 # as US/Canada. They did it last year as well, and it looks like they 2949 # are going to observe DST every year now... 2950 # 2951 # http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/ 2952 # http://www.canalplushaiti.net/?p=6714 2953 2954 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2955 Rule Haiti 1983 only - May 8 0:00 1:00 D 2956 Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 2957 Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S 2958 # Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 2959 # Go with IATA. 2960 Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 2961 Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 2962 Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 2963 Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S 2964 Rule Haiti 2012 max - Mar Sun>=8 2:00 1:00 D 2965 Rule Haiti 2012 max - Nov Sun>=1 2:00 0 S 2966 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 2967 Zone America/Port-au-Prince -4:49:20 - LMT 1890 2968 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 2969 -5:00 Haiti E%sT 2970 2971 # Honduras 2972 # Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 2973 2974 # From Paul Eggert (2006-05-05): 2975 # worldtimezone.com reports a 2006-05-02 Spanish-language AP article 2976 # saying Honduras will start using DST midnight Saturday, effective 4 2977 # months until September. La Tribuna reported today 2978 # <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 2979 # of Honduras, refused to back down on this. 2980 2981 # From Jesper Nørgaard Welen (2006-08-08): 2982 # It seems that Honduras has returned from DST to standard time this Monday at 2983 # 00:00 hours (prolonging Sunday to 25 hours duration). 2984 # http://www.worldtimezone.com/dst_news/dst_news_honduras04.html 2985 2986 # From Paul Eggert (2006-08-08): 2987 # Also see Diario El Heraldo, The country returns to standard time (2006-08-08). 2988 # http://www.elheraldo.hn/nota.php?nid=54941&sec=12 2989 # It mentions executive decree 18-2006. 2990 2991 # From Steffen Thorsen (2006-08-17): 2992 # Honduras will observe DST from 2007 to 2009, exact dates are not 2993 # published, I have located this authoritative source: 2994 # http://www.presidencia.gob.hn/noticia.aspx?nId=47 2995 2996 # From Steffen Thorsen (2007-03-30): 2997 # http://www.laprensahn.com/pais_nota.php?id04962=7386 2998 # So it seems that Honduras will not enter DST this year.... 2999 3000 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3001 Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 3002 Rule Hond 1987 1988 - Sep lastSun 0:00 0 S 3003 Rule Hond 2006 only - May Sun>=1 0:00 1:00 D 3004 Rule Hond 2006 only - Aug Mon>=1 0:00 0 S 3005 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3006 Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 3007 -6:00 Hond C%sT 3008 # 3009 # Great Swan I ceded by US to Honduras in 1972 3010 3011 # Jamaica 3012 # Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an 3013 # unspecified official document, and says "This time is used throughout the 3014 # island". Go with Milne. Round to the nearest second as required by zic. 3015 # 3016 # Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but 3017 # Lance Neita writes that Prime Minister Michael Manley decreed it January 5. 3018 # Assume Neita meant Jan 6 02:00, the same as the US. Neita also writes that 3019 # Manley's supporters associated this act with Manley's nickname "Joshua" 3020 # (recall that in the Bible the sun stood still at Joshua's request), 3021 # and with the Rod of Correction which Manley said he had received from 3022 # Haile Selassie, Emperor of Ethiopia. See: 3023 # Neita L. The politician in all of us. Jamaica Observer 2014-09-20 3024 # http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647 3025 # 3026 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3027 Zone America/Jamaica -5:07:11 - LMT 1890 # Kingston 3028 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3029 -5:00 - EST 1974 3030 -5:00 US E%sT 1984 3031 -5:00 - EST 3032 3033 # Martinique 3034 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3035 Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 3036 -4:04:20 - FFMT 1911 May # Fort-de-France MT 3037 -4:00 - AST 1980 Apr 6 3038 -4:00 1:00 ADT 1980 Sep 28 3039 -4:00 - AST 3040 3041 # Montserrat 3042 # See America/Port_of_Spain. 3043 3044 # Nicaragua 3045 # 3046 # This uses Shanks & Pottenger for times before 2005. 3047 # 3048 # From Steffen Thorsen (2005-04-12): 3049 # I've got reports from 8 different people that Nicaragua just started 3050 # DST on Sunday 2005-04-10, in order to save energy because of 3051 # expensive petroleum. The exact end date for DST is not yet 3052 # announced, only "September" but some sites also say "mid-September". 3053 # Some background information is available on the President's official site: 3054 # http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 3055 # The Decree, no 23-2005 is available here: 3056 # 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 3057 # 3058 # From Paul Eggert (2005-05-01): 3059 # The decree doesn't say anything about daylight saving, but for now let's 3060 # assume that it is daylight saving.... 3061 # 3062 # From Gwillim Law (2005-04-21): 3063 # The Associated Press story on the time change, which can be found at 3064 # http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 3065 # and elsewhere, says (fifth paragraph, translated from Spanish): "The last 3066 # time that a change of clocks was applied to save energy was in the year 2000 3067 # during the Arnoldo Alemán administration."... 3068 # The northamerica file says that Nicaragua has been on UTC-6 continuously 3069 # since December 1998. I wasn't able to find any details of Nicaraguan time 3070 # changes in 2000. Perhaps a note could be added to the northamerica file, to 3071 # the effect that we have indirect evidence that DST was observed in 2000. 3072 # 3073 # From Jesper Nørgaard Welen (2005-11-02): 3074 # Nicaragua left DST the 2005-10-02 at 00:00 (local time). 3075 # http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 3076 # (2005-09-26) 3077 # 3078 # From Jesper Nørgaard Welen (2006-05-05): 3079 # http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 3080 # (my informal translation) 3081 # By order of the president of the republic, Enrique Bolaños, Nicaragua 3082 # advanced by sixty minutes their official time, yesterday at 2 in the 3083 # morning, and will stay that way until 30th of September. 3084 # 3085 # From Jesper Nørgaard Welen (2006-09-30): 3086 # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf 3087 # My informal translation runs: 3088 # The natural sun time is restored in all the national territory, in that the 3089 # time is returned one hour at 01:00 am of October 1 of 2006. 3090 # 3091 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 3092 Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 3093 Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 3094 Rule Nic 2005 only - Apr 10 0:00 1:00 D 3095 Rule Nic 2005 only - Oct Sun>=1 0:00 0 S 3096 Rule Nic 2006 only - Apr 30 2:00 1:00 D 3097 Rule Nic 2006 only - Oct Sun>=1 1:00 0 S 3098 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3099 Zone America/Managua -5:45:08 - LMT 1890 3100 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 3101 -6:00 - CST 1973 May 3102 -5:00 - EST 1975 Feb 16 3103 -6:00 Nic C%sT 1992 Jan 1 4:00 3104 -5:00 - EST 1992 Sep 24 3105 -6:00 - CST 1993 3106 -5:00 - EST 1997 3107 -6:00 Nic C%sT 3108 3109 # Panama 3110 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3111 Zone America/Panama -5:18:08 - LMT 1890 3112 -5:19:36 - CMT 1908 Apr 22 # Colón Mean Time 3113 -5:00 - EST 3114 3115 # Puerto Rico 3116 # There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'. 3117 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3118 Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 3119 -4:00 - AST 1942 May 3 3120 -4:00 US A%sT 1946 3121 -4:00 - AST 3122 3123 # St Kitts-Nevis 3124 # St Lucia 3125 # See America/Port_of_Spain. 3126 3127 # St Pierre and Miquelon 3128 # There are too many St Pierres elsewhere, so we'll use 'Miquelon'. 3129 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3130 Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 3131 -4:00 - AST 1980 May 3132 -3:00 - PMST 1987 # Pierre & Miquelon Time 3133 -3:00 Canada PM%sT 3134 3135 # St Vincent and the Grenadines 3136 # See America/Port_of_Spain. 3137 3138 # Turks and Caicos 3139 # 3140 # From Chris Dunn in 3141 # http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007 3142 # (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the 3143 # daylight saving dates for time changes have been adjusted to match 3144 # the recent U.S. change of dates. 3145 # 3146 # From Brian Inglis (2007-04-28): 3147 # http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 3148 # there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 3149 # rows before that there is an out of date entry for Oct: 3150 # "Eastern Standard Times Begins 2007 3151 # Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 3152 # indicating that the normal ET rules are followed. 3153 # 3154 # From Paul Eggert (2014-08-19): 3155 # The 2014-08-13 Cabinet meeting decided to stay on UTC-4 year-round. See: 3156 # http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm 3157 # Model this as a switch from EST/EDT to AST on 2014-11-02 at 02:00. 3158 # 3159 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 3160 Zone America/Grand_Turk -4:44:32 - LMT 1890 3161 -5:07:11 - KMT 1912 Feb # Kingston Mean Time 3162 -5:00 - EST 1979 3163 -5:00 US E%sT 2014 Nov 2 2:00 3164 -4:00 - AST 3165 3166 # British Virgin Is 3167 # Virgin Is 3168 # See America/Port_of_Spain. 3169 3170 3171 # Local Variables: 3172 # coding: utf-8 3173 # End: