J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 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. Sun designates this |
| 7 | # particular file as subject to the "Classpath" exception as provided |
| 8 | # by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 21 | # CA 95054 USA or visit www.sun.com if you need additional information or |
| 22 | # have any questions. |
| 23 | # |
| 24 | # <pre> |
| 25 | |
| 26 | # also includes Central America and the Caribbean |
| 27 | |
| 28 | # This data is by no means authoritative; if you think you know better, |
| 29 | # go ahead and edit the file (and please send any changes to |
| 30 | # tz@elsie.nci.nih.gov for general use in the future). |
| 31 | |
| 32 | # From Paul Eggert (1999-03-22): |
| 33 | # A reliable and entertaining source about time zones is |
| 34 | # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). |
| 35 | |
| 36 | ############################################################################### |
| 37 | |
| 38 | # United States |
| 39 | |
| 40 | # From Paul Eggert (1999-03-31): |
| 41 | # Howse writes (pp 121-125) that time zones were invented by |
| 42 | # Professor Charles Ferdinand Dowd (1825-1904), |
| 43 | # Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). |
| 44 | # His pamphlet ``A System of National Time for Railroads'' (1870) |
| 45 | # was the result of his proposals at the Convention of Railroad Trunk Lines |
| 46 | # in New York City (1869-10). His 1870 proposal was based on Washington, DC, |
| 47 | # but in 1872-05 he moved the proposed origin to Greenwich. |
| 48 | # His proposal was adopted by the railroads on 1883-11-18 at 12:00, |
| 49 | # and the most of the country soon followed suit. |
| 50 | |
| 51 | # From Paul Eggert (2005-04-16): |
| 52 | # That 1883 transition occurred at 12:00 new time, not at 12:00 old time. |
| 53 | # See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). |
| 54 | |
| 55 | # From Paul Eggert (2006-03-22): |
| 56 | # A good source for time zone historical data in the US is |
| 57 | # Thomas G. Shanks, The American Atlas (5th edition), |
| 58 | # San Diego: ACS Publications, Inc. (1991). |
| 59 | # Make sure you have the errata sheet; the book is somewhat useless without it. |
| 60 | # It is the source for most of the pre-1991 US entries below. |
| 61 | |
| 62 | # From Paul Eggert (2001-03-06): |
| 63 | # Daylight Saving Time was first suggested as a joke by Benjamin Franklin |
| 64 | # in his whimsical essay ``An Economical Project for Diminishing the Cost |
| 65 | # of Light'' published in the Journal de Paris (1784-04-26). |
| 66 | # Not everyone is happy with the results: |
| 67 | # |
| 68 | # I don't really care how time is reckoned so long as there is some |
| 69 | # agreement about it, but I object to being told that I am saving |
| 70 | # daylight when my reason tells me that I am doing nothing of the kind. |
| 71 | # I even object to the implication that I am wasting something |
| 72 | # valuable if I stay in bed after the sun has risen. As an admirer |
| 73 | # of moonlight I resent the bossy insistence of those who want to |
| 74 | # reduce my time for enjoying it. At the back of the Daylight Saving |
| 75 | # scheme I detect the bony, blue-fingered hand of Puritanism, eager |
| 76 | # to push people into bed earlier, and get them up earlier, to make |
| 77 | # them healthy, wealthy and wise in spite of themselves. |
| 78 | # |
| 79 | # -- Robertson Davies, The diary of Samuel Marchbanks, |
| 80 | # Clarke, Irwin (1947), XIX, Sunday |
| 81 | # |
| 82 | # For more about the first ten years of DST in the United States, see |
| 83 | # Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html"> |
| 84 | # Ten years of daylight saving from the Pittsburgh standpoint |
| 85 | # (Carnegie Library of Pittsburgh, 1927)</a>. |
| 86 | # |
| 87 | # Shanks says that DST was called "War Time" in the US in 1918 and 1919. |
| 88 | # However, DST was imposed by the Standard Time Act of 1918, which |
| 89 | # was the first nationwide legal time standard, and apparently |
| 90 | # time was just called "Standard Time" or "Daylight Saving Time". |
| 91 | |
| 92 | # From Arthur David Olson: |
| 93 | # US Daylight Saving Time ended on the last Sunday of *October* in 1974. |
| 94 | # See, for example, the front page of the Saturday, 1974-10-26 |
| 95 | # and Sunday, 1974-10-27 editions of the Washington Post. |
| 96 | |
| 97 | # From Arthur David Olson: |
| 98 | # Before the Uniform Time Act of 1966 took effect in 1967, observance of |
| 99 | # Daylight Saving Time in the US was by local option, except during wartime. |
| 100 | |
| 101 | # From Arthur David Olson (2000-09-25): |
| 102 | # Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. |
| 103 | # In the introduction, Oboler spoke of "Eastern Peace Time." |
| 104 | # An AltaVista search turned up |
| 105 | # <a href="http://rowayton.org/rhs/hstaug45.html">: |
| 106 | # "When the time is announced over the radio now, it is 'Eastern Peace |
| 107 | # Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." |
| 108 | # </a> (August 1945) by way of confirmation. |
| 109 | |
| 110 | # From Joseph Gallant citing |
| 111 | # George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): |
| 112 | # At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set |
| 113 | # to switch to London for Attlee's address, but the American people |
| 114 | # never got to hear his speech live. According to one press account, |
| 115 | # CBS' Bob Trout was first to announce the word of Japan's surrender, |
| 116 | # but a few seconds later, NBC, ABC and Mutual also flashed the word |
| 117 | # of surrender, all of whom interrupting the bells of Big Ben in |
| 118 | # London which were to precede Mr. Attlee's speech. |
| 119 | |
| 120 | # From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From |
| 121 | # Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: |
| 122 | # |
| 123 | # ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. |
| 124 | # Any announcement from Asia would reach St. John's New York newsroom on a |
| 125 | # wire service teletype machine, which had prescribed signals for major news. |
| 126 | # Associated Press, for example, would ring five bells before spewing out |
| 127 | # typed copy of an important story, and 10 bells for news "of transcendental |
| 128 | # importance." |
| 129 | # |
| 130 | # On Aug. 14, stalling while talking steadily into the NBC networks' open |
| 131 | # microphone, St. John heard five bells and waited only to hear a sixth bell, |
| 132 | # before announcing confidently: "Ladies and gentlemen, World War II is over. |
| 133 | # The Japanese have agreed to our surrender terms." |
| 134 | # |
| 135 | # He had scored a 20-second scoop on other broadcasters. |
| 136 | |
| 137 | # From Arthur David Olson (2005-08-22): |
| 138 | # Paul has been careful to use the "US" rules only in those locations |
| 139 | # that are part of the United States; this reflects the real scope of |
| 140 | # U.S. government action. So even though the "US" rules have changed |
| 141 | # in the latest release, other countries won't be affected. |
| 142 | |
| 143 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
| 144 | Rule US 1918 1919 - Mar lastSun 2:00 1:00 D |
| 145 | Rule US 1918 1919 - Oct lastSun 2:00 0 S |
| 146 | Rule US 1942 only - Feb 9 2:00 1:00 W # War |
| 147 | Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace |
| 148 | Rule US 1945 only - Sep 30 2:00 0 S |
| 149 | Rule US 1967 2006 - Oct lastSun 2:00 0 S |
| 150 | Rule US 1967 1973 - Apr lastSun 2:00 1:00 D |
| 151 | Rule US 1974 only - Jan 6 2:00 1:00 D |
| 152 | Rule US 1975 only - Feb 23 2:00 1:00 D |
| 153 | Rule US 1976 1986 - Apr lastSun 2:00 1:00 D |
| 154 | Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D |
| 155 | Rule US 2007 max - Mar Sun>=8 2:00 1:00 D |
| 156 | Rule US 2007 max - Nov Sun>=1 2:00 0 S |
| 157 | |
| 158 | # From Arthur David Olson, 2005-12-19 |
| 159 | # We generate the files specified below to guard against old files with |
| 160 | # obsolete information being left in the time zone binary directory. |
| 161 | # We limit the list to names that have appeared in previous versions of |
| 162 | # this time zone package. |
| 163 | # We do these as separate Zones rather than as Links to avoid problems if |
| 164 | # a particular place changes whether it observes DST. |
| 165 | # We put these specifications here in the northamerica file both to |
| 166 | # increase the chances that they'll actually get compiled and to |
| 167 | # avoid the need to duplicate the US rules in another file. |
| 168 | |
| 169 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 170 | Zone EST -5:00 - EST |
| 171 | Zone MST -7:00 - MST |
| 172 | Zone HST -10:00 - HST |
| 173 | Zone EST5EDT -5:00 US E%sT |
| 174 | Zone CST6CDT -6:00 US C%sT |
| 175 | Zone MST7MDT -7:00 US M%sT |
| 176 | Zone PST8PDT -8:00 US P%sT |
| 177 | |
| 178 | # From Bob Devine (1988-01-28): |
| 179 | # ...Alaska (and Hawaii) had the timezone names changed in 1967. |
| 180 | # old new |
| 181 | # Pacific Standard Time(PST) -same- |
| 182 | # Yukon Standard Time(YST) -same- |
| 183 | # Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) |
| 184 | # Nome Standard Time (NT) Bering Standard Time (BST) |
| 185 | # |
| 186 | # ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. |
| 187 | # The YST zone now covers nearly all of the state, AHST just part |
| 188 | # of the Aleutian islands. No DST. |
| 189 | |
| 190 | # From Paul Eggert (1995-12-19): |
| 191 | # The tables below use `NST', not `NT', for Nome Standard Time. |
| 192 | # I invented `CAWT' for Central Alaska War Time. |
| 193 | |
| 194 | # From U. S. Naval Observatory (1989-01-19): |
| 195 | # USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON |
| 196 | # USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 |
| 197 | # USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON |
| 198 | # USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 |
| 199 | # USA MOUNTAIN 7 H BEHIND UTC DENVER |
| 200 | # USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 |
| 201 | # USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO |
| 202 | # USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 |
| 203 | # USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) |
| 204 | # USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) |
| 205 | # USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W |
| 206 | # USA - " - 9 H BEHIND UTC APR 3 - OCT 30 |
| 207 | # USA HAWAII 10 H BEHIND UTC |
| 208 | # USA BERING 11 H BEHIND UTC SAMOA, MIDWAY |
| 209 | |
| 210 | # From Arthur David Olson (1989-01-21): |
| 211 | # The above dates are for 1988. |
| 212 | # Note the "AKST" and "AKDT" abbreviations, the claim that there's |
| 213 | # no DST in Samoa, and the claim that there is DST in Alaska and the |
| 214 | # Aleutians. |
| 215 | |
| 216 | # From Arthur David Olson (1988-02-13): |
| 217 | # Legal standard time zone names, from United States Code (1982 Edition and |
| 218 | # Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names |
| 219 | # up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 |
| 220 | # took effect), as explained in sections 263 and 261: |
| 221 | # (none) |
| 222 | # United States standard eastern time |
| 223 | # United States standard mountain time |
| 224 | # United States standard central time |
| 225 | # United States standard Pacific time |
| 226 | # (none) |
| 227 | # United States standard Alaska time |
| 228 | # (none) |
| 229 | # Next, names from 1967-04-01 until 1983-11-30 (the date for |
| 230 | # public law 98-181): |
| 231 | # Atlantic standard time |
| 232 | # eastern standard time |
| 233 | # central standard time |
| 234 | # mountain standard time |
| 235 | # Pacific standard time |
| 236 | # Yukon standard time |
| 237 | # Alaska-Hawaii standard time |
| 238 | # Bering standard time |
| 239 | # And after 1983-11-30: |
| 240 | # Atlantic standard time |
| 241 | # eastern standard time |
| 242 | # central standard time |
| 243 | # mountain standard time |
| 244 | # Pacific standard time |
| 245 | # Alaska standard time |
| 246 | # Hawaii-Aleutian standard time |
| 247 | # Samoa standard time |
| 248 | # The law doesn't give abbreviations. |
| 249 | # |
| 250 | # From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: |
| 251 | # Public law 106-564 (2000-12-23) introduced the abbreviation |
| 252 | # "Chamorro Standard Time" for time in Guam and the Northern Marianas. |
| 253 | # See the file "australasia". |
| 254 | |
| 255 | # From Arthur David Olson, 2005-08-09 |
| 256 | # The following was signed into law on 2005-08-08. |
| 257 | # |
| 258 | # H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. |
| 259 | # (a) Amendment- Section 3(a) of the Uniform Time Act of 1966 (15 |
| 260 | # U.S.C. 260a(a)) is amended-- |
| 261 | # (1) by striking `first Sunday of April' and inserting `second |
| 262 | # Sunday of March'; and |
| 263 | # (2) by striking `last Sunday of October' and inserting `first |
| 264 | # Sunday of November'. |
| 265 | # (b) Effective Date- Subsection (a) shall take effect 1 year after the |
| 266 | # date of enactment of this Act or March 1, 2007, whichever is later. |
| 267 | # (c) Report to Congress- Not later than 9 months after the effective |
| 268 | # date stated in subsection (b), the Secretary shall report to Congress |
| 269 | # on the impact of this section on energy consumption in the United |
| 270 | # States. |
| 271 | # (d) Right to Revert- Congress retains the right to revert the |
| 272 | # Daylight Saving Time back to the 2005 time schedules once the |
| 273 | # Department study is complete. |
| 274 | |
| 275 | # US eastern time, represented by New York |
| 276 | |
| 277 | # Connecticut, Delaware, District of Columbia, most of Florida, |
| 278 | # Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky |
| 279 | # (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, |
| 280 | # New Hampshire, New Jersey, New York, North Carolina, Ohio, |
| 281 | # Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, |
| 282 | # Vermont, Virginia, West Virginia |
| 283 | |
| 284 | # From Dave Cantor (2004-11-02): |
| 285 | # Early this summer I had the occasion to visit the Mount Washington |
| 286 | # Observatory weather station atop (of course!) Mount Washington [, NH].... |
| 287 | # One of the staff members said that the station was on Eastern Standard Time |
| 288 | # and didn't change their clocks for Daylight Saving ... so that their |
| 289 | # reports will always have times which are 5 hours behind UTC. |
| 290 | |
| 291 | # From Paul Eggert (2005-08-26): |
| 292 | # According to today's Huntsville Times |
| 293 | # <http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1> |
| 294 | # a few towns on Alabama's "eastern border with Georgia, such as Phenix City |
| 295 | # in Russell County, Lanett in Chambers County and some towns in Lee County, |
| 296 | # set their watches and clocks on Eastern time." It quotes H.H. "Bubba" |
| 297 | # Roberts, city administrator in Phenix City. as saying "We are in the Central |
| 298 | # time zone, but we do go by the Eastern time zone because so many people work |
| 299 | # in Columbus." |
| 300 | |
| 301 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
| 302 | Rule NYC 1920 only - Mar lastSun 2:00 1:00 D |
| 303 | Rule NYC 1920 only - Oct lastSun 2:00 0 S |
| 304 | Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D |
| 305 | Rule NYC 1921 1954 - Sep lastSun 2:00 0 S |
| 306 | Rule NYC 1955 1966 - Oct lastSun 2:00 0 S |
| 307 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 308 | Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 |
| 309 | -5:00 US E%sT 1920 |
| 310 | -5:00 NYC E%sT 1942 |
| 311 | -5:00 US E%sT 1946 |
| 312 | -5:00 NYC E%sT 1967 |
| 313 | -5:00 US E%sT |
| 314 | |
| 315 | # US central time, represented by Chicago |
| 316 | |
| 317 | # Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, |
| 318 | # Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and |
| 319 | # Washington counties), Illinois, western Indiana |
| 320 | # (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, |
| 321 | # Vanderburgh, and Warrick counties), Iowa, most of Kansas, western |
| 322 | # Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern |
| 323 | # Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, |
| 324 | # western Tennessee, most of Texas, Wisconsin |
| 325 | |
| 326 | # From Larry M. Smith (2006-04-26) re Wisconsin: |
| 327 | # http://www.legis.state.wi.us/statutes/Stat0175.pdf ... |
| 328 | # is currently enforced at the 01:00 time of change. Because the local |
| 329 | # "bar time" in the state corresponds to 02:00, a number of citations |
| 330 | # are issued for the "sale of class 'B' alcohol after prohibited |
| 331 | # hours" within the deviated hour of this change every year.... |
| 332 | # |
| 333 | # From Douglas R. Bomberg (2007-03-12): |
| 334 | # Wisconsin has enacted (nearly eleventh-hour) legislation to get WI |
| 335 | # Statue 175 closer in synch with the US Congress' intent.... |
| 336 | # http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf |
| 337 | |
| 338 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
| 339 | Rule Chicago 1920 only - Jun 13 2:00 1:00 D |
| 340 | Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S |
| 341 | Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D |
| 342 | Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D |
| 343 | Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S |
| 344 | Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S |
| 345 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 346 | Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 |
| 347 | -6:00 US C%sT 1920 |
| 348 | -6:00 Chicago C%sT 1936 Mar 1 2:00 |
| 349 | -5:00 - EST 1936 Nov 15 2:00 |
| 350 | -6:00 Chicago C%sT 1942 |
| 351 | -6:00 US C%sT 1946 |
| 352 | -6:00 Chicago C%sT 1967 |
| 353 | -6:00 US C%sT |
| 354 | # Oliver County, ND switched from mountain to central time on 1992-10-25. |
| 355 | Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 |
| 356 | -7:00 US M%sT 1992 Oct 25 02:00 |
| 357 | -6:00 US C%sT |
| 358 | # Morton County, ND, switched from mountain to central time on |
| 359 | # 2003-10-26, except for the area around Mandan which was already central time. |
| 360 | # See <http://dmses.dot.gov/docimages/p63/135818.pdf>. |
| 361 | # Officially this switch also included part of Sioux County, and |
| 362 | # Jones, Mellette, and Todd Counties in South Dakota; |
| 363 | # but in practice these other counties were already observing central time. |
| 364 | # See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. |
| 365 | Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 |
| 366 | -7:00 US M%sT 2003 Oct 26 02:00 |
| 367 | -6:00 US C%sT |
| 368 | |
| 369 | # US mountain time, represented by Denver |
| 370 | # |
| 371 | # Colorado, far western Kansas, Montana, western |
| 372 | # Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), |
| 373 | # New Mexico, southwestern North Dakota, |
| 374 | # western South Dakota, far western Texas (El Paso County, Hudspeth County, |
| 375 | # and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming |
| 376 | # |
| 377 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
| 378 | Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D |
| 379 | Rule Denver 1920 only - Oct lastSun 2:00 0 S |
| 380 | Rule Denver 1921 only - May 22 2:00 0 S |
| 381 | Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D |
| 382 | Rule Denver 1965 1966 - Oct lastSun 2:00 0 S |
| 383 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 384 | Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 |
| 385 | -7:00 US M%sT 1920 |
| 386 | -7:00 Denver M%sT 1942 |
| 387 | -7:00 US M%sT 1946 |
| 388 | -7:00 Denver M%sT 1967 |
| 389 | -7:00 US M%sT |
| 390 | |
| 391 | # US Pacific time, represented by Los Angeles |
| 392 | # |
| 393 | # California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, |
| 394 | # Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, |
| 395 | # and the northern three-quarters of Idaho county), |
| 396 | # most of Nevada, most of Oregon, and Washington |
| 397 | # |
| 398 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
| 399 | Rule CA 1948 only - Mar 14 2:00 1:00 D |
| 400 | Rule CA 1949 only - Jan 1 2:00 0 S |
| 401 | Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D |
| 402 | Rule CA 1950 1961 - Sep lastSun 2:00 0 S |
| 403 | Rule CA 1962 1966 - Oct lastSun 2:00 0 S |
| 404 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 405 | Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 |
| 406 | -8:00 US P%sT 1946 |
| 407 | -8:00 CA P%sT 1967 |
| 408 | -8:00 US P%sT |
| 409 | |
| 410 | # Alaska |
| 411 | # AK%sT is the modern abbreviation for -9:00 per USNO. |
| 412 | # |
| 413 | # From Paul Eggert (2001-05-30): |
| 414 | # Howse writes that Alaska switched from the Julian to the Gregorian calendar, |
| 415 | # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. |
| 416 | # This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, |
| 417 | # also a Friday. Include only the time zone part of this transition, |
| 418 | # ignoring the switch from Julian to Gregorian, since we can't represent |
| 419 | # the Julian calendar. |
| 420 | # |
| 421 | # As far as we know, none of the exact locations mentioned below were |
| 422 | # permanently inhabited in 1867 by anyone using either calendar. |
| 423 | # (Yakutat was colonized by the Russians in 1799, but the settlement |
| 424 | # was destroyed in 1805 by a Yakutat-kon war party.) However, there |
| 425 | # were nearby inhabitants in some cases and for our purposes perhaps |
| 426 | # it's best to simply use the official transition. |
| 427 | # |
| 428 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 429 | Zone America/Juneau 15:02:19 - LMT 1867 Oct 18 |
| 430 | -8:57:41 - LMT 1900 Aug 20 12:00 |
| 431 | -8:00 - PST 1942 |
| 432 | -8:00 US P%sT 1946 |
| 433 | -8:00 - PST 1969 |
| 434 | -8:00 US P%sT 1983 Oct 30 2:00 |
| 435 | -9:00 US Y%sT 1983 Nov 30 |
| 436 | -9:00 US AK%sT |
| 437 | Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 |
| 438 | -9:18:55 - LMT 1900 Aug 20 12:00 |
| 439 | -9:00 - YST 1942 |
| 440 | -9:00 US Y%sT 1946 |
| 441 | -9:00 - YST 1969 |
| 442 | -9:00 US Y%sT 1983 Nov 30 |
| 443 | -9:00 US AK%sT |
| 444 | Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18 |
| 445 | -9:59:36 - LMT 1900 Aug 20 12:00 |
| 446 | -10:00 - CAT 1942 |
| 447 | -10:00 US CAT/CAWT 1945 Aug 14 23:00u |
| 448 | -10:00 US CAT/CAPT 1946 # Peace |
| 449 | -10:00 - CAT 1967 Apr |
| 450 | -10:00 - AHST 1969 |
| 451 | -10:00 US AH%sT 1983 Oct 30 2:00 |
| 452 | -9:00 US Y%sT 1983 Nov 30 |
| 453 | -9:00 US AK%sT |
| 454 | Zone America/Nome 12:58:21 - LMT 1867 Oct 18 |
| 455 | -11:01:38 - LMT 1900 Aug 20 12:00 |
| 456 | -11:00 - NST 1942 |
| 457 | -11:00 US N%sT 1946 |
| 458 | -11:00 - NST 1967 Apr |
| 459 | -11:00 - BST 1969 |
| 460 | -11:00 US B%sT 1983 Oct 30 2:00 |
| 461 | -9:00 US Y%sT 1983 Nov 30 |
| 462 | -9:00 US AK%sT |
| 463 | Zone America/Adak 12:13:21 - LMT 1867 Oct 18 |
| 464 | -11:46:38 - LMT 1900 Aug 20 12:00 |
| 465 | -11:00 - NST 1942 |
| 466 | -11:00 US N%sT 1946 |
| 467 | -11:00 - NST 1967 Apr |
| 468 | -11:00 - BST 1969 |
| 469 | -11:00 US B%sT 1983 Oct 30 2:00 |
| 470 | -10:00 US AH%sT 1983 Nov 30 |
| 471 | -10:00 US HA%sT |
| 472 | # The following switches don't quite make our 1970 cutoff. |
| 473 | # |
| 474 | # Shanks writes that part of southwest Alaska (e.g. Aniak) |
| 475 | # switched from -11:00 to -10:00 on 1968-09-22 at 02:00, |
| 476 | # and another part (e.g. Akiak) made the same switch five weeks later. |
| 477 | # |
| 478 | # From David Flater (2004-11-09): |
| 479 | # In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska |
| 480 | # Historic Preservation Commission, provided this information, which |
| 481 | # suggests that Unalaska deviated from statutory time from early 1967 |
| 482 | # possibly until 1983: |
| 483 | # |
| 484 | # Minutes of the Unalaska City Council Meeting, January 10, 1967: |
| 485 | # "Except for St. Paul and Akutan, Unalaska is the only important |
| 486 | # location not on Alaska Standard Time. The following resolution was |
| 487 | # made by William Robinson and seconded by Henry Swanson: Be it |
| 488 | # resolved that the City of Unalaska hereby goes to Alaska Standard |
| 489 | # Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, |
| 490 | # January 14, Alaska Standard Time.) This resolution was passed with |
| 491 | # three votes for and one against." |
| 492 | |
| 493 | # Hawaii |
| 494 | # |
| 495 | # From Arthur David Olson: |
| 496 | # And then there's Hawaii. |
| 497 | # DST was observed for one day in 1933; |
| 498 | # standard time was changed by half an hour in 1947; |
| 499 | # it's always standard as of 1986. |
| 500 | # |
| 501 | # From Paul Eggert: |
| 502 | # Shanks says the 1933 experiment lasted for three weeks. Go with Shanks. |
| 503 | # |
| 504 | Zone Pacific/Honolulu -10:31:26 - LMT 1900 Jan 1 12:00 |
| 505 | -10:30 - HST 1933 Apr 30 2:00 |
| 506 | -10:30 1:00 HDT 1933 May 21 2:00 |
| 507 | -10:30 US H%sT 1947 Jun 8 2:00 |
| 508 | -10:00 - HST |
| 509 | |
| 510 | # Now we turn to US areas that have diverged from the consensus since 1970. |
| 511 | |
| 512 | # Arizona mostly uses MST. |
| 513 | |
| 514 | # From Paul Eggert (2002-10-20): |
| 515 | # |
| 516 | # The information in the rest of this paragraph is derived from the |
| 517 | # <a href="http://www.dlapr.lib.az.us/links/daylight.htm"> |
| 518 | # Daylight Saving Time web page (2002-01-23)</a> maintained by the |
| 519 | # Arizona State Library, Archives and Public Records. |
| 520 | # Between 1944-01-01 and 1944-04-01 the State of Arizona used standard |
| 521 | # time, but by federal law railroads, airlines, bus lines, military |
| 522 | # personnel, and some engaged in interstate commerce continued to |
| 523 | # observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix |
| 524 | # Gazette says that was the date the law changed, and that 04-01 was |
| 525 | # the date the state's clocks would change. In 1945 the State of |
| 526 | # Arizona used standard time all year, again with exceptions only as |
| 527 | # mandated by federal law. Arizona observed DST in 1967, but Arizona |
| 528 | # Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. |
| 529 | # |
| 530 | # Shanks says the 1944 experiment came to an end on 1944-03-17. |
| 531 | # Go with the Arizona State Library instead. |
| 532 | |
| 533 | Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 |
| 534 | -7:00 US M%sT 1944 Jan 1 00:01 |
| 535 | -7:00 - MST 1944 Apr 1 00:01 |
| 536 | -7:00 US M%sT 1944 Oct 1 00:01 |
| 537 | -7:00 - MST 1967 |
| 538 | -7:00 US M%sT 1968 Mar 21 |
| 539 | -7:00 - MST |
| 540 | # From Arthur David Olson (1988-02-13): |
| 541 | # A writer from the Inter Tribal Council of Arizona, Inc., |
| 542 | # notes in private correspondence dated 1987-12-28 that "Presently, only the |
| 543 | # Navajo Nation participates in the Daylight Saving Time policy, due to its |
| 544 | # large size and location in three states." (The "only" means that other |
| 545 | # tribal nations don't use DST.) |
| 546 | |
| 547 | Link America/Denver America/Shiprock |
| 548 | |
| 549 | # Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, |
| 550 | # Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, |
| 551 | # Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, |
| 552 | # Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, |
| 553 | # Teton, Twin Falls, Valley, Washington counties, and the southern |
| 554 | # quarter of Idaho county) and eastern Oregon (most of Malheur County) |
| 555 | # switched four weeks late in 1974. |
| 556 | # |
| 557 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 558 | Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 |
| 559 | -8:00 US P%sT 1923 May 13 2:00 |
| 560 | -7:00 US M%sT 1974 |
| 561 | -7:00 - MST 1974 Feb 3 2:00 |
| 562 | -7:00 US M%sT |
| 563 | |
| 564 | # Indiana |
| 565 | # |
| 566 | # For a map of Indiana's time zone regions, see: |
| 567 | # <a href="http://www.mccsc.edu/time.html"> |
| 568 | # What time is it in Indiana? |
| 569 | # </a> (2006-03-01) |
| 570 | # |
| 571 | # From Paul Eggert (2007-08-17): |
| 572 | # Since 1970, most of Indiana has been like America/Indiana/Indianapolis, |
| 573 | # with the following exceptions: |
| 574 | # |
| 575 | # - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, |
| 576 | # Vandenburgh, and Warrick counties have been like America/Chicago. |
| 577 | # |
| 578 | # - Dearborn and Ohio counties have been like America/New_York. |
| 579 | # |
| 580 | # - Clark, Floyd, and Harrison counties have been like |
| 581 | # America/Kentucky/Louisville. |
| 582 | # |
| 583 | # - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, |
| 584 | # and Switzerland counties have their own time zone histories as noted below. |
| 585 | # |
| 586 | # Shanks partitioned Indiana into 345 regions, each with its own time history, |
| 587 | # and wrote ``Even newspaper reports present contradictory information.'' |
| 588 | # Those Hoosiers! Such a flighty and changeable people! |
| 589 | # Fortunately, most of the complexity occurred before our cutoff date of 1970. |
| 590 | # |
| 591 | # Other than Indianapolis, the Indiana place names are so nondescript |
| 592 | # that they would be ambiguous if we left them at the `America' level. |
| 593 | # So we reluctantly put them all in a subdirectory `America/Indiana'. |
| 594 | |
| 595 | # From Paul Eggert (2005-08-16): |
| 596 | # http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006. |
| 597 | |
| 598 | # From Nathan Stratton Treadway (2006-03-30): |
| 599 | # http://www.dot.gov/affairs/dot0406.htm [3705 B] |
| 600 | # From Deborah Goldsmith (2006-01-18): |
| 601 | # http://dmses.dot.gov/docimages/pdf95/382329_web.pdf [2.9 MB] |
| 602 | # From Paul Eggert (2006-01-20): |
| 603 | # It says "DOT is relocating the time zone boundary in Indiana to move Starke, |
| 604 | # Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the |
| 605 | # Eastern Time Zone to the Central Time Zone.... The effective date of |
| 606 | # this rule is 2:OO a.m. EST Sunday, April 2, 2006, which is the |
| 607 | # changeover date from standard time to Daylight Saving Time." |
| 608 | # Strictly speaking, this means the affected counties will change their |
| 609 | # clocks twice that night, but this obviously is in error. The intent |
| 610 | # is that 01:59:59 EST be followed by 02:00:00 CDT. |
| 611 | |
| 612 | # From Gwillim Law (2007-02-10): |
| 613 | # The Associated Press has been reporting that Pulaski County, Indiana is |
| 614 | # going to switch from Central to Eastern Time on March 11, 2007.... |
| 615 | # http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL |
| 616 | |
| 617 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
| 618 | Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D |
| 619 | Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S |
| 620 | Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D |
| 621 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 622 | Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 |
| 623 | -6:00 US C%sT 1920 |
| 624 | -6:00 Indianapolis C%sT 1942 |
| 625 | -6:00 US C%sT 1946 |
| 626 | -6:00 Indianapolis C%sT 1955 Apr 24 2:00 |
| 627 | -5:00 - EST 1957 Sep 29 2:00 |
| 628 | -6:00 - CST 1958 Apr 27 2:00 |
| 629 | -5:00 - EST 1969 |
| 630 | -5:00 US E%sT 1971 |
| 631 | -5:00 - EST 2006 |
| 632 | -5:00 US E%sT |
| 633 | # |
| 634 | # Eastern Crawford County, Indiana, left its clocks alone in 1974, |
| 635 | # as well as from 1976 through 2005. |
| 636 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
| 637 | Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D |
| 638 | Rule Marengo 1951 only - Sep lastSun 2:00 0 S |
| 639 | Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D |
| 640 | Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S |
| 641 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 642 | Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 |
| 643 | -6:00 US C%sT 1951 |
| 644 | -6:00 Marengo C%sT 1961 Apr 30 2:00 |
| 645 | -5:00 - EST 1969 |
| 646 | -5:00 US E%sT 1974 Jan 6 2:00 |
| 647 | -6:00 1:00 CDT 1974 Oct 27 2:00 |
| 648 | -5:00 US E%sT 1976 |
| 649 | -5:00 - EST 2006 |
| 650 | -5:00 US E%sT |
| 651 | # |
| 652 | # Daviess, Dubois, Knox, and Martin Counties, Indiana, |
| 653 | # switched from eastern to central time in April 2006, then switched back |
| 654 | # in November 2007. |
| 655 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
| 656 | Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D |
| 657 | Rule Vincennes 1946 only - Sep lastSun 2:00 0 S |
| 658 | Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D |
| 659 | Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S |
| 660 | Rule Vincennes 1955 only - May 1 0:00 1:00 D |
| 661 | Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D |
| 662 | Rule Vincennes 1960 only - Oct lastSun 2:00 0 S |
| 663 | Rule Vincennes 1961 only - Sep lastSun 2:00 0 S |
| 664 | Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S |
| 665 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 666 | Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 |
| 667 | -6:00 US C%sT 1946 |
| 668 | -6:00 Vincennes C%sT 1964 Apr 26 2:00 |
| 669 | -5:00 - EST 1969 |
| 670 | -5:00 US E%sT 1971 |
| 671 | -5:00 - EST 2006 Apr 2 2:00 |
| 672 | -6:00 US C%sT 2007 Nov 4 2:00 |
| 673 | -5:00 US E%sT |
| 674 | # |
| 675 | # Perry County, Indiana, switched from eastern to central time in April 2006. |
| 676 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
| 677 | Rule Perry 1946 only - Apr lastSun 2:00 1:00 D |
| 678 | Rule Perry 1946 only - Sep lastSun 2:00 0 S |
| 679 | Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D |
| 680 | Rule Perry 1953 1959 - Sep lastSun 2:00 0 S |
| 681 | Rule Perry 1955 only - May 1 0:00 1:00 D |
| 682 | Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D |
| 683 | Rule Perry 1960 only - Oct lastSun 2:00 0 S |
| 684 | Rule Perry 1961 only - Sep lastSun 2:00 0 S |
| 685 | Rule Perry 1962 1963 - Oct lastSun 2:00 0 S |
| 686 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 687 | Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 |
| 688 | -6:00 US C%sT 1946 |
| 689 | -6:00 Perry C%sT 1964 Apr 26 2:00 |
| 690 | -5:00 - EST 1969 |
| 691 | -5:00 US E%sT 1971 |
| 692 | -5:00 - EST 2006 Apr 2 2:00 |
| 693 | -6:00 US C%sT |
| 694 | # |
| 695 | # Pike County, Indiana moved from central to eastern time in 1977, |
| 696 | # then switched back in 2006, then switched back again in 2007. |
| 697 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
| 698 | Rule Pike 1955 only - May 1 0:00 1:00 D |
| 699 | Rule Pike 1955 1960 - Sep lastSun 2:00 0 S |
| 700 | Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D |
| 701 | Rule Pike 1961 1964 - Oct lastSun 2:00 0 S |
| 702 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 703 | Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 |
| 704 | -6:00 US C%sT 1955 |
| 705 | -6:00 Pike C%sT 1965 Apr 25 2:00 |
| 706 | -5:00 - EST 1966 Oct 30 2:00 |
| 707 | -6:00 US C%sT 1977 Oct 30 2:00 |
| 708 | -5:00 - EST 2006 Apr 2 2:00 |
| 709 | -6:00 US C%sT 2007 Nov 4 2:00 |
| 710 | -5:00 US E%sT |
| 711 | # |
| 712 | # Starke County, Indiana moved from central to eastern time in 1991, |
| 713 | # then switched back in 2006. |
| 714 | # From Arthur David Olson (1991-10-28): |
| 715 | # An article on page A3 of the Sunday, 1991-10-27 Washington Post |
| 716 | # notes that Starke County switched from Central time to Eastern time as of |
| 717 | # 1991-10-27. |
| 718 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
| 719 | Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D |
| 720 | Rule Starke 1947 1954 - Sep lastSun 2:00 0 S |
| 721 | Rule Starke 1955 1956 - Oct lastSun 2:00 0 S |
| 722 | Rule Starke 1957 1958 - Sep lastSun 2:00 0 S |
| 723 | Rule Starke 1959 1961 - Oct lastSun 2:00 0 S |
| 724 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 725 | Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 |
| 726 | -6:00 US C%sT 1947 |
| 727 | -6:00 Starke C%sT 1962 Apr 29 2:00 |
| 728 | -5:00 - EST 1963 Oct 27 2:00 |
| 729 | -6:00 US C%sT 1991 Oct 27 2:00 |
| 730 | -5:00 - EST 2006 Apr 2 2:00 |
| 731 | -6:00 US C%sT |
| 732 | # |
| 733 | # Pulaski County, Indiana, switched from eastern to central time in |
| 734 | # April 2006 and then switched back in March 2007. |
| 735 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
| 736 | Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D |
| 737 | Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S |
| 738 | Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S |
| 739 | Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S |
| 740 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 741 | Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 |
| 742 | -6:00 US C%sT 1946 |
| 743 | -6:00 Pulaski C%sT 1961 Apr 30 2:00 |
| 744 | -5:00 - EST 1969 |
| 745 | -5:00 US E%sT 1971 |
| 746 | -5:00 - EST 2006 Apr 2 2:00 |
| 747 | -6:00 US C%sT 2007 Mar 11 2:00 |
| 748 | -5:00 US E%sT |
| 749 | # |
| 750 | # Switzerland County, Indiana, did not observe DST from 1973 through 2005. |
| 751 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 752 | Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 |
| 753 | -6:00 US C%sT 1954 Apr 25 2:00 |
| 754 | -5:00 - EST 1969 |
| 755 | -5:00 US E%sT 1973 |
| 756 | -5:00 - EST 2006 |
| 757 | -5:00 US E%sT |
| 758 | |
| 759 | # Part of Kentucky left its clocks alone in 1974. |
| 760 | # This also includes Clark, Floyd, and Harrison counties in Indiana. |
| 761 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
| 762 | Rule Louisville 1921 only - May 1 2:00 1:00 D |
| 763 | Rule Louisville 1921 only - Sep 1 2:00 0 S |
| 764 | Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D |
| 765 | Rule Louisville 1941 only - Sep lastSun 2:00 0 S |
| 766 | Rule Louisville 1946 only - Jun 2 2:00 0 S |
| 767 | Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S |
| 768 | Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S |
| 769 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 770 | Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 |
| 771 | -6:00 US C%sT 1921 |
| 772 | -6:00 Louisville C%sT 1942 |
| 773 | -6:00 US C%sT 1946 |
| 774 | -6:00 Louisville C%sT 1961 Jul 23 2:00 |
| 775 | -5:00 - EST 1968 |
| 776 | -5:00 US E%sT 1974 Jan 6 2:00 |
| 777 | -6:00 1:00 CDT 1974 Oct 27 2:00 |
| 778 | -5:00 US E%sT |
| 779 | # |
| 780 | # Wayne County, Kentucky |
| 781 | # |
| 782 | # From |
| 783 | # <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml"> |
| 784 | # Lake Cumberland LIFE |
| 785 | # </a> (1999-01-29) via WKYM-101.7: |
| 786 | # Clinton County has joined Wayne County in asking the DoT to change from |
| 787 | # the Central to the Eastern time zone.... The Wayne County government made |
| 788 | # the same request in December. And while Russell County officials have not |
| 789 | # taken action, the majority of respondents to a poll conducted there in |
| 790 | # August indicated they would like to change to "fast time" also. |
| 791 | # The three Lake Cumberland counties are the farthest east of any U.S. |
| 792 | # location in the Central time zone. |
| 793 | # |
| 794 | # From Rich Wales (2000-08-29): |
| 795 | # After prolonged debate, and despite continuing deep differences of opinion, |
| 796 | # Wayne County (central Kentucky) is switching from Central (-0600) to Eastern |
| 797 | # (-0500) time. They won't "fall back" this year. See Sara Shipley, |
| 798 | # The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). |
| 799 | # |
| 800 | # From Paul Eggert (2001-07-16): |
| 801 | # The final rule was published in the |
| 802 | # <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22"> |
| 803 | # Federal Register 65, 160 (2000-08-17), page 50154-50158. |
| 804 | # </a> |
| 805 | # |
| 806 | Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 |
| 807 | -6:00 US C%sT 1946 |
| 808 | -6:00 - CST 1968 |
| 809 | -6:00 US C%sT 2000 Oct 29 2:00 |
| 810 | -5:00 US E%sT |
| 811 | |
| 812 | |
| 813 | # From Rives McDow (2000-08-30): |
| 814 | # Here ... are all the changes in the US since 1985. |
| 815 | # Kearny County, KS (put all of county on central; |
| 816 | # previously split between MST and CST) ... 1990-10 |
| 817 | # Starke County, IN (from CST to EST) ... 1991-10 |
| 818 | # Oliver County, ND (from MST to CST) ... 1992-10 |
| 819 | # West Wendover, NV (from PST TO MST) ... 1999-10 |
| 820 | # Wayne County, KY (from CST to EST) ... 2000-10 |
| 821 | # |
| 822 | # From Paul Eggert (2001-07-17): |
| 823 | # We don't know where the line used to be within Kearny County, KS, |
| 824 | # so omit that change for now. |
| 825 | # See America/Indiana/Knox for the Starke County, IN change. |
| 826 | # See America/North_Dakota/Center for the Oliver County, ND change. |
| 827 | # West Wendover, NV officially switched from Pacific to mountain time on |
| 828 | # 1999-10-31. See the |
| 829 | # <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15"> |
| 830 | # Federal Register 64, 203 (1999-10-21), page 56705-56707. |
| 831 | # </a> |
| 832 | # However, the Federal Register says that West Wendover already operated |
| 833 | # on mountain time, and the rule merely made this official; |
| 834 | # hence a separate tz entry is not needed. |
| 835 | |
| 836 | # Michigan |
| 837 | # |
| 838 | # From Bob Devine (1988-01-28): |
| 839 | # Michigan didn't observe DST from 1968 to 1973. |
| 840 | # |
| 841 | # From Paul Eggert (1999-03-31): |
| 842 | # Shanks writes that Michigan started using standard time on 1885-09-18, |
| 843 | # but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) |
| 844 | # that Detroit kept |
| 845 | # |
| 846 | # local time until 1900 when the City Council decreed that clocks should |
| 847 | # be put back twenty-eight minutes to Central Standard Time. Half the |
| 848 | # city obeyed, half refused. After considerable debate, the decision |
| 849 | # was rescinded and the city reverted to Sun time. A derisive offer to |
| 850 | # erect a sundial in front of the city hall was referred to the |
| 851 | # Committee on Sewers. Then, in 1905, Central time was adopted |
| 852 | # by city vote. |
| 853 | # |
| 854 | # This story is too entertaining to be false, so go with Howse over Shanks. |
| 855 | # |
| 856 | # From Paul Eggert (2001-03-06): |
| 857 | # Garland (1927) writes ``Cleveland and Detroit advanced their clocks |
| 858 | # one hour in 1914.'' This change is not in Shanks. We have no more |
| 859 | # info, so omit this for now. |
| 860 | # |
| 861 | # Most of Michigan observed DST from 1973 on, but was a bit late in 1975. |
| 862 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
| 863 | Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D |
| 864 | Rule Detroit 1948 only - Sep lastSun 2:00 0 S |
| 865 | Rule Detroit 1967 only - Jun 14 2:00 1:00 D |
| 866 | Rule Detroit 1967 only - Oct lastSun 2:00 0 S |
| 867 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 868 | Zone America/Detroit -5:32:11 - LMT 1905 |
| 869 | -6:00 - CST 1915 May 15 2:00 |
| 870 | -5:00 - EST 1942 |
| 871 | -5:00 US E%sT 1946 |
| 872 | -5:00 Detroit E%sT 1973 |
| 873 | -5:00 US E%sT 1975 |
| 874 | -5:00 - EST 1975 Apr 27 2:00 |
| 875 | -5:00 US E%sT |
| 876 | # |
| 877 | # Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, |
| 878 | # switched from EST to CST/CDT in 1973. |
| 879 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
| 880 | Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D |
| 881 | Rule Menominee 1946 only - Sep lastSun 2:00 0 S |
| 882 | Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D |
| 883 | Rule Menominee 1966 only - Oct lastSun 2:00 0 S |
| 884 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 885 | Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 |
| 886 | -6:00 US C%sT 1946 |
| 887 | -6:00 Menominee C%sT 1969 Apr 27 2:00 |
| 888 | -5:00 - EST 1973 Apr 29 2:00 |
| 889 | -6:00 US C%sT |
| 890 | |
| 891 | # Navassa |
| 892 | # administered by the US Fish and Wildlife Service |
| 893 | # claimed by US under the provisions of the 1856 Guano Islands Act |
| 894 | # also claimed by Haiti |
| 895 | # occupied 1857/1900 by the Navassa Phosphate Co |
| 896 | # US lighthouse 1917/1996-09 |
| 897 | # currently uninhabited |
| 898 | # see Mark Fineman, ``An Isle Rich in Guano and Discord'', |
| 899 | # _Los Angeles Times_ (1998-11-10), A1, A10; it cites |
| 900 | # Jimmy Skaggs, _The Great Guano Rush_ (1994). |
| 901 | |
| 902 | ################################################################################ |
| 903 | |
| 904 | |
| 905 | # From Paul Eggert (2006-03-22): |
| 906 | # A good source for time zone historical data outside the U.S. is |
| 907 | # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), |
| 908 | # San Diego: ACS Publications, Inc. (2003). |
| 909 | # |
| 910 | # Gwillim Law writes that a good source |
| 911 | # for recent time zone data is the International Air Transport |
| 912 | # Association's Standard Schedules Information Manual (IATA SSIM), |
| 913 | # published semiannually. Law sent in several helpful summaries |
| 914 | # of the IATA's data after 1990. |
| 915 | # |
| 916 | # Except where otherwise noted, Shanks & Pottenger is the source for |
| 917 | # entries through 1990, and IATA SSIM is the source for entries afterwards. |
| 918 | # |
| 919 | # Other sources occasionally used include: |
| 920 | # |
| 921 | # Edward W. Whitman, World Time Differences, |
| 922 | # Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), |
| 923 | # which I found in the UCLA library. |
| 924 | # |
| 925 | # <a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf"> |
| 926 | # William Willett, The Waste of Daylight, 19th edition |
| 927 | # </a> (1914-03) |
| 928 | # |
| 929 | # See the `europe' file for Greenland. |
| 930 | |
| 931 | # Canada |
| 932 | |
| 933 | # From Alain LaBont<e'> (1994-11-14): |
| 934 | # I post here the time zone abbreviations standardized in Canada |
| 935 | # for both English and French in the CAN/CSA-Z234.4-89 standard.... |
| 936 | # |
| 937 | # UTC Standard time Daylight savings time |
| 938 | # offset French English French English |
| 939 | # -2:30 - - HAT NDT |
| 940 | # -3 - - HAA ADT |
| 941 | # -3:30 HNT NST - - |
| 942 | # -4 HNA AST HAE EDT |
| 943 | # -5 HNE EST HAC CDT |
| 944 | # -6 HNC CST HAR MDT |
| 945 | # -7 HNR MST HAP PDT |
| 946 | # -8 HNP PST HAY YDT |
| 947 | # -9 HNY YST - - |
| 948 | # |
| 949 | # HN: Heure Normale ST: Standard Time |
| 950 | # HA: Heure Avanc<e'>e DT: Daylight saving Time |
| 951 | # |
| 952 | # A: de l'Atlantique Atlantic |
| 953 | # C: du Centre Central |
| 954 | # E: de l'Est Eastern |
| 955 | # M: Mountain |
| 956 | # N: Newfoundland |
| 957 | # P: du Pacifique Pacific |
| 958 | # R: des Rocheuses |
| 959 | # T: de Terre-Neuve |
| 960 | # Y: du Yukon Yukon |
| 961 | # |
| 962 | # From Paul Eggert (1994-11-22): |
| 963 | # Alas, this sort of thing must be handled by localization software. |
| 964 | |
| 965 | # Unless otherwise specified, the data for Canada are all from Shanks |
| 966 | # & Pottenger. |
| 967 | |
| 968 | # From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, |
| 969 | # 2007-03-01): |
| 970 | # The British Columbia government announced yesterday that it will |
| 971 | # adjust daylight savings next year to align with changes in the |
| 972 | # U.S. and the rest of Canada.... |
| 973 | # http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm |
| 974 | # ... |
| 975 | # Nova Scotia |
| 976 | # Daylight saving time will be extended by four weeks starting in 2007.... |
| 977 | # http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf |
| 978 | # |
| 979 | # [For New Brunswick] the new legislation dictates that the time change is to |
| 980 | # be done at 02:00 instead of 00:01. |
| 981 | # http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf |
| 982 | # ... |
| 983 | # Manitoba has traditionally changed the clock every fall at 03:00. |
| 984 | # As of 2006, the transition is to take place one hour earlier at 02:00. |
| 985 | # http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php |
| 986 | # ... |
| 987 | # [Alberta, Ontario, Quebec] will follow US rules. |
| 988 | # http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM |
| 989 | # http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm |
| 990 | # http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF |
| 991 | # ... |
| 992 | # P.E.I. will follow US rules.... |
| 993 | # http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf |
| 994 | # ... |
| 995 | # Province of Newfoundland and Labrador.... |
| 996 | # http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm |
| 997 | # ... |
| 998 | # Yukon |
| 999 | # http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf |
| 1000 | # ... |
| 1001 | # N.W.T. will follow US rules. Whoever maintains the government web site |
| 1002 | # does not seem to believe in bookmarks. To see the news release, click the |
| 1003 | # following link and search for "Daylight Savings Time Change". Press the |
| 1004 | # "Daylight Savings Time Change" link; it will fire off a popup using |
| 1005 | # JavaScript. |
| 1006 | # http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive |
| 1007 | # ... |
| 1008 | # Nunavut |
| 1009 | # An amendment to the Interpretation Act was registered on February 19/2007.... |
| 1010 | # http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf |
| 1011 | |
| 1012 | # From Paul Eggert (2006-04-25): |
| 1013 | # H. David Matthews and Mary Vincent's map |
| 1014 | # <a href="http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp"> |
| 1015 | # "It's about TIME", _Canadian Geographic_ (September-October 1998) |
| 1016 | # </a> contains detailed boundaries for regions observing nonstandard |
| 1017 | # time and daylight saving time arrangements in Canada circa 1998. |
| 1018 | # |
| 1019 | # INMS, the Institute for National Measurement Standards in Ottawa, has <a |
| 1020 | # href="http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php"> |
| 1021 | # information about standard and daylight saving time zones in Canada. |
| 1022 | # </a> (updated periodically). |
| 1023 | # Its unofficial information is often taken from Matthews and Vincent. |
| 1024 | |
| 1025 | # From Paul Eggert (2006-06-27): |
| 1026 | # For now, assume all of DST-observing Canada will fall into line with the |
| 1027 | # new US DST rules, |
| 1028 | |
| 1029 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
| 1030 | Rule Canada 1918 only - Apr 14 2:00 1:00 D |
| 1031 | Rule Canada 1918 only - Oct 31 2:00 0 S |
| 1032 | Rule Canada 1942 only - Feb 9 2:00 1:00 W # War |
| 1033 | Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace |
| 1034 | Rule Canada 1945 only - Sep 30 2:00 0 S |
| 1035 | Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D |
| 1036 | Rule Canada 1974 2006 - Oct lastSun 2:00 0 S |
| 1037 | Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D |
| 1038 | Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D |
| 1039 | Rule Canada 2007 max - Nov Sun>=1 2:00 0 S |
| 1040 | |
| 1041 | |
| 1042 | # Newfoundland and Labrador |
| 1043 | |
| 1044 | # From Paul Eggert (2000-10-02): |
| 1045 | # Matthews and Vincent (1998) write that Labrador should use NST/NDT, |
| 1046 | # but the only part of Labrador that follows the rules is the |
| 1047 | # southeast corner, including Port Hope Simpson and Mary's Harbour, |
| 1048 | # but excluding, say, Black Tickle. |
| 1049 | |
| 1050 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
| 1051 | Rule StJohns 1917 only - Apr 8 2:00 1:00 D |
| 1052 | Rule StJohns 1917 only - Sep 17 2:00 0 S |
| 1053 | # Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. |
| 1054 | Rule StJohns 1919 only - May 5 23:00 1:00 D |
| 1055 | Rule StJohns 1919 only - Aug 12 23:00 0 S |
| 1056 | # For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. |
| 1057 | Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D |
| 1058 | Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S |
| 1059 | # For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & |
| 1060 | # Pottenger. |
| 1061 | Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D |
| 1062 | Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S |
| 1063 | # Whitman gives the following transitions: |
| 1064 | # 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 |
| 1065 | # but go with Shanks & Pottenger and assume they used Canadian rules. |
| 1066 | # For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives |
| 1067 | # Apr 30 - Sep 24; go with Shanks & Pottenger. |
| 1068 | Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D |
| 1069 | Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S |
| 1070 | Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D |
| 1071 | Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S |
| 1072 | Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S |
| 1073 | # From Paul Eggert (2000-10-02): |
| 1074 | # INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches |
| 1075 | # at 00:01 local time. For now, assume it started in 1987. |
| 1076 | Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D |
| 1077 | Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S |
| 1078 | Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD |
| 1079 | Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D |
| 1080 | Rule StJohns 2007 max - Mar Sun>=8 0:01 1:00 D |
| 1081 | Rule StJohns 2007 max - Nov Sun>=1 0:01 0 S |
| 1082 | # |
| 1083 | # St John's has an apostrophe, but Posix file names can't have apostrophes. |
| 1084 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 1085 | Zone America/St_Johns -3:30:52 - LMT 1884 |
| 1086 | -3:30:52 StJohns N%sT 1918 |
| 1087 | -3:30:52 Canada N%sT 1919 |
| 1088 | -3:30:52 StJohns N%sT 1935 Mar 30 |
| 1089 | -3:30 StJohns N%sT 1942 May 11 |
| 1090 | -3:30 Canada N%sT 1946 |
| 1091 | -3:30 StJohns N%sT |
| 1092 | |
| 1093 | # most of east Labrador |
| 1094 | |
| 1095 | # The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'. |
| 1096 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 1097 | Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay |
| 1098 | -3:30:52 - NST 1918 |
| 1099 | -3:30:52 Canada N%sT 1919 |
| 1100 | -3:30:52 - NST 1935 Mar 30 |
| 1101 | -3:30 - NST 1936 |
| 1102 | -3:30 StJohns N%sT 1942 May 11 |
| 1103 | -3:30 Canada N%sT 1946 |
| 1104 | -3:30 StJohns N%sT 1966 Mar 15 2:00 |
| 1105 | -4:00 StJohns A%sT |
| 1106 | |
| 1107 | |
| 1108 | # west Labrador, Nova Scotia, Prince Edward I |
| 1109 | |
| 1110 | # From Paul Eggert (2006-03-22): |
| 1111 | # Shanks & Pottenger write that since 1970 most of this region has been like |
| 1112 | # Halifax. Many locales did not observe peacetime DST until 1972; |
| 1113 | # Glace Bay, NS is the largest that we know of. |
| 1114 | # Shanks & Pottenger also write that Liverpool, NS was the only town |
| 1115 | # in Canada to observe DST in 1971 but not 1970; for now we'll assume |
| 1116 | # this is a typo. |
| 1117 | |
| 1118 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
| 1119 | Rule Halifax 1916 only - Apr 1 0:00 1:00 D |
| 1120 | Rule Halifax 1916 only - Oct 1 0:00 0 S |
| 1121 | Rule Halifax 1920 only - May 9 0:00 1:00 D |
| 1122 | Rule Halifax 1920 only - Aug 29 0:00 0 S |
| 1123 | Rule Halifax 1921 only - May 6 0:00 1:00 D |
| 1124 | Rule Halifax 1921 1922 - Sep 5 0:00 0 S |
| 1125 | Rule Halifax 1922 only - Apr 30 0:00 1:00 D |
| 1126 | Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D |
| 1127 | Rule Halifax 1923 only - Sep 4 0:00 0 S |
| 1128 | Rule Halifax 1924 only - Sep 15 0:00 0 S |
| 1129 | Rule Halifax 1925 only - Sep 28 0:00 0 S |
| 1130 | Rule Halifax 1926 only - May 16 0:00 1:00 D |
| 1131 | Rule Halifax 1926 only - Sep 13 0:00 0 S |
| 1132 | Rule Halifax 1927 only - May 1 0:00 1:00 D |
| 1133 | Rule Halifax 1927 only - Sep 26 0:00 0 S |
| 1134 | Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D |
| 1135 | Rule Halifax 1928 only - Sep 9 0:00 0 S |
| 1136 | Rule Halifax 1929 only - Sep 3 0:00 0 S |
| 1137 | Rule Halifax 1930 only - Sep 15 0:00 0 S |
| 1138 | Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S |
| 1139 | Rule Halifax 1932 only - May 1 0:00 1:00 D |
| 1140 | Rule Halifax 1933 only - Apr 30 0:00 1:00 D |
| 1141 | Rule Halifax 1933 only - Oct 2 0:00 0 S |
| 1142 | Rule Halifax 1934 only - May 20 0:00 1:00 D |
| 1143 | Rule Halifax 1934 only - Sep 16 0:00 0 S |
| 1144 | Rule Halifax 1935 only - Jun 2 0:00 1:00 D |
| 1145 | Rule Halifax 1935 only - Sep 30 0:00 0 S |
| 1146 | Rule Halifax 1936 only - Jun 1 0:00 1:00 D |
| 1147 | Rule Halifax 1936 only - Sep 14 0:00 0 S |
| 1148 | Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D |
| 1149 | Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S |
| 1150 | Rule Halifax 1939 only - May 28 0:00 1:00 D |
| 1151 | Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D |
| 1152 | Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D |
| 1153 | Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S |
| 1154 | Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D |
| 1155 | Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S |
| 1156 | Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D |
| 1157 | Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S |
| 1158 | Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D |
| 1159 | Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S |
| 1160 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 1161 | Zone America/Halifax -4:14:24 - LMT 1902 Jun 15 |
| 1162 | -4:00 Halifax A%sT 1918 |
| 1163 | -4:00 Canada A%sT 1919 |
| 1164 | -4:00 Halifax A%sT 1942 Feb 9 2:00s |
| 1165 | -4:00 Canada A%sT 1946 |
| 1166 | -4:00 Halifax A%sT 1974 |
| 1167 | -4:00 Canada A%sT |
| 1168 | Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 |
| 1169 | -4:00 Canada A%sT 1953 |
| 1170 | -4:00 Halifax A%sT 1954 |
| 1171 | -4:00 - AST 1972 |
| 1172 | -4:00 Halifax A%sT 1974 |
| 1173 | -4:00 Canada A%sT |
| 1174 | |
| 1175 | # New Brunswick |
| 1176 | |
| 1177 | # From Paul Eggert (2007-01-31): |
| 1178 | # The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> |
| 1179 | # says they changed at 00:01 through 2006, and |
| 1180 | # <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it |
| 1181 | # clear that this was the case since at least 1993. |
| 1182 | # For now, assume it started in 1993. |
| 1183 | |
| 1184 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
| 1185 | Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D |
| 1186 | Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S |
| 1187 | Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D |
| 1188 | Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S |
| 1189 | Rule Moncton 1939 only - May 27 1:00 1:00 D |
| 1190 | Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S |
| 1191 | Rule Moncton 1940 only - May 19 1:00 1:00 D |
| 1192 | Rule Moncton 1941 only - May 4 1:00 1:00 D |
| 1193 | Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D |
| 1194 | Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S |
| 1195 | Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S |
| 1196 | Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D |
| 1197 | Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S |
| 1198 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 1199 | Zone America/Moncton -4:19:08 - LMT 1883 Dec 9 |
| 1200 | -5:00 - EST 1902 Jun 15 |
| 1201 | -4:00 Canada A%sT 1933 |
| 1202 | -4:00 Moncton A%sT 1942 |
| 1203 | -4:00 Canada A%sT 1946 |
| 1204 | -4:00 Moncton A%sT 1973 |
| 1205 | -4:00 Canada A%sT 1993 |
| 1206 | -4:00 Moncton A%sT 2007 |
| 1207 | -4:00 Canada A%sT |
| 1208 | |
| 1209 | # Quebec |
| 1210 | |
| 1211 | # From Paul Eggert (2006-07-09): |
| 1212 | # Shanks & Pottenger write that since 1970 most of Quebec has been |
| 1213 | # like Montreal. |
| 1214 | |
| 1215 | # From Paul Eggert (2006-06-27): |
| 1216 | # Matthews and Vincent (1998) also write that Quebec east of the -63 |
| 1217 | # meridian is supposed to observe AST, but residents as far east as |
| 1218 | # Natashquan use EST/EDT, and residents east of Natashquan use AST. |
| 1219 | # In "Official time in Quebec" the Quebec department of justice writes in |
| 1220 | # http://www.justice.gouv.qc.ca/english/publications/generale/temps-regl-1-a.htm |
| 1221 | # that "The residents of the Municipality of the |
| 1222 | # Cote-Nord-du-Golfe-Saint-Laurent and the municipalities of Saint-Augustin, |
| 1223 | # Bonne-Esperance and Blanc-Sablon apply the Official Time Act as it is |
| 1224 | # written and use Atlantic standard time all year round. The same applies to |
| 1225 | # the residents of the Native facilities along the lower North Shore." |
| 1226 | # <http://www.assnat.qc.ca/eng/37legislature2/Projets-loi/Publics/06-a002.htm> |
| 1227 | # says this common practice was codified into law as of 2007. |
| 1228 | # For lack of better info, guess this practice began around 1970, contra to |
| 1229 | # Shanks & Pottenger who have this region observing AST/ADT. |
| 1230 | |
| 1231 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
| 1232 | Rule Mont 1917 only - Mar 25 2:00 1:00 D |
| 1233 | Rule Mont 1917 only - Apr 24 0:00 0 S |
| 1234 | Rule Mont 1919 only - Mar 31 2:30 1:00 D |
| 1235 | Rule Mont 1919 only - Oct 25 2:30 0 S |
| 1236 | Rule Mont 1920 only - May 2 2:30 1:00 D |
| 1237 | Rule Mont 1920 1922 - Oct Sun>=1 2:30 0 S |
| 1238 | Rule Mont 1921 only - May 1 2:00 1:00 D |
| 1239 | Rule Mont 1922 only - Apr 30 2:00 1:00 D |
| 1240 | Rule Mont 1924 only - May 17 2:00 1:00 D |
| 1241 | Rule Mont 1924 1926 - Sep lastSun 2:30 0 S |
| 1242 | Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D |
| 1243 | # The 1927-to-1937 rules can be expressed more simply as |
| 1244 | # Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D |
| 1245 | # Rule Mont 1927 1937 - Sep lastSat 24:00 0 S |
| 1246 | # The rules below avoid use of 24:00 |
| 1247 | # (which pre-1998 versions of zic cannot handle). |
| 1248 | Rule Mont 1927 only - May 1 0:00 1:00 D |
| 1249 | Rule Mont 1927 1932 - Sep lastSun 0:00 0 S |
| 1250 | Rule Mont 1928 1931 - Apr lastSun 0:00 1:00 D |
| 1251 | Rule Mont 1932 only - May 1 0:00 1:00 D |
| 1252 | Rule Mont 1933 1940 - Apr lastSun 0:00 1:00 D |
| 1253 | Rule Mont 1933 only - Oct 1 0:00 0 S |
| 1254 | Rule Mont 1934 1939 - Sep lastSun 0:00 0 S |
| 1255 | Rule Mont 1946 1973 - Apr lastSun 2:00 1:00 D |
| 1256 | Rule Mont 1945 1948 - Sep lastSun 2:00 0 S |
| 1257 | Rule Mont 1949 1950 - Oct lastSun 2:00 0 S |
| 1258 | Rule Mont 1951 1956 - Sep lastSun 2:00 0 S |
| 1259 | Rule Mont 1957 1973 - Oct lastSun 2:00 0 S |
| 1260 | |
| 1261 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 1262 | Zone America/Blanc-Sablon -3:48:28 - LMT 1884 |
| 1263 | -4:00 Canada A%sT 1970 |
| 1264 | -4:00 - AST |
| 1265 | Zone America/Montreal -4:54:16 - LMT 1884 |
| 1266 | -5:00 Mont E%sT 1918 |
| 1267 | -5:00 Canada E%sT 1919 |
| 1268 | -5:00 Mont E%sT 1942 Feb 9 2:00s |
| 1269 | -5:00 Canada E%sT 1946 |
| 1270 | -5:00 Mont E%sT 1974 |
| 1271 | -5:00 Canada E%sT |
| 1272 | |
| 1273 | |
| 1274 | # Ontario |
| 1275 | |
| 1276 | # From Paul Eggert (2006-07-09): |
| 1277 | # Shanks & Pottenger write that since 1970 most of Ontario has been like |
| 1278 | # Toronto. |
| 1279 | # Thunder Bay skipped DST in 1973. |
| 1280 | # Many smaller locales did not observe peacetime DST until 1974; |
| 1281 | # Nipigon (EST) and Rainy River (CST) are the largest that we know of. |
| 1282 | # Far west Ontario is like Winnipeg; far east Quebec is like Halifax. |
| 1283 | |
| 1284 | # From Mark Brader (2003-07-26): |
| 1285 | # [According to the Toronto Star] Orillia, Ontario, adopted DST |
| 1286 | # effective Saturday, 1912-06-22, 22:00; the article mentions that |
| 1287 | # Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw |
| 1288 | # have already done so. In Orillia DST was to run until Saturday, |
| 1289 | # 1912-08-31 (no time mentioned), but it was met with considerable |
| 1290 | # hostility from certain segments of the public, and was revoked after |
| 1291 | # only two weeks -- I copied it as Saturday, 1912-07-07, 22:00, but |
| 1292 | # presumably that should be -07-06. (1912-06-19, -07-12; also letters |
| 1293 | # earlier in June). |
| 1294 | # |
| 1295 | # Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). |
| 1296 | |
| 1297 | # From Paul Eggert (1997-10-17): |
| 1298 | # Mark Brader writes that an article in the 1997-10-14 Toronto Star |
| 1299 | # says that Atikokan, Ontario currently does not observe DST, |
| 1300 | # but will vote on 11-10 whether to use EST/EDT. |
| 1301 | # He also writes that the |
| 1302 | # <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html"> |
| 1303 | # Ontario Time Act (1990, Chapter T.9) |
| 1304 | # </a> |
| 1305 | # says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. |
| 1306 | # Officially Atikokan is therefore on CST/CDT, and most likely this report |
| 1307 | # concerns a non-official time observed as a matter of local practice. |
| 1308 | # |
| 1309 | # From Paul Eggert (2000-10-02): |
| 1310 | # Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and |
| 1311 | # New Osnaburgh observe CST all year, that Big Trout Lake observes |
| 1312 | # CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in |
| 1313 | # violation of the official Ontario rules. |
| 1314 | # |
| 1315 | # From Paul Eggert (2006-07-09): |
| 1316 | # Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the |
| 1317 | # 2005-07-21 Chronicle-Journal, which said: |
| 1318 | # |
| 1319 | # The clocks in Atikokan stay set on standard time year-round. |
| 1320 | # This means they spend about half the time on central time and |
| 1321 | # the other half on eastern time. |
| 1322 | # |
| 1323 | # For the most part, the system works, Mayor Dennis Brown said. |
| 1324 | # |
| 1325 | # "The majority of businesses in Atikokan deal more with Eastern |
| 1326 | # Canada, but there are some that deal with Western Canada," he |
| 1327 | # said. "I don't see any changes happening here." |
| 1328 | # |
| 1329 | # Walton also writes "Supposedly Pickle Lake and Mishkeegogamang |
| 1330 | # [New Osnaburgh] follow the same practice." |
| 1331 | |
| 1332 | # From Garry McKinnon (2006-07-14) via Chris Walton: |
| 1333 | # I chatted with a member of my board who has an outstanding memory |
| 1334 | # and a long history in Atikokan (and in the telecom industry) and he |
| 1335 | # can say for certain that Atikokan has been practicing the current |
| 1336 | # time keeping since 1952, at least. |
| 1337 | |
| 1338 | # From Paul Eggert (2006-07-17): |
| 1339 | # Shanks & Pottenger say that Atikokan has agreed with Rainy River |
| 1340 | # ever since standard time was introduced, but the information from |
| 1341 | # McKinnon sounds more authoritative. For now, assume that Atikokan |
| 1342 | # switched to EST immediately after WWII era daylight saving time |
| 1343 | # ended. This matches the old (less-populous) America/Coral_Harbour |
| 1344 | # entry since our cutoff date of 1970, so we can move |
| 1345 | # America/Coral_Harbour to the 'backward' file. |
| 1346 | |
| 1347 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
| 1348 | Rule Toronto 1919 only - Mar 30 23:30 1:00 D |
| 1349 | Rule Toronto 1919 only - Oct 26 0:00 0 S |
| 1350 | Rule Toronto 1920 only - May 2 2:00 1:00 D |
| 1351 | Rule Toronto 1920 only - Sep 26 0:00 0 S |
| 1352 | Rule Toronto 1921 only - May 15 2:00 1:00 D |
| 1353 | Rule Toronto 1921 only - Sep 15 2:00 0 S |
| 1354 | Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D |
| 1355 | # Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" |
| 1356 | # was meant. |
| 1357 | Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S |
| 1358 | Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D |
| 1359 | # The 1927-to-1939 rules can be expressed more simply as |
| 1360 | # Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S |
| 1361 | # Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D |
| 1362 | # Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D |
| 1363 | # Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S |
| 1364 | # The rules below avoid use of Sun>=25 |
| 1365 | # (which pre-2004 versions of zic cannot handle). |
| 1366 | Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S |
| 1367 | Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D |
| 1368 | Rule Toronto 1932 only - May 1 2:00 1:00 D |
| 1369 | Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D |
| 1370 | Rule Toronto 1933 only - Oct 1 2:00 0 S |
| 1371 | Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S |
| 1372 | Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S |
| 1373 | Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D |
| 1374 | Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D |
| 1375 | Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S |
| 1376 | Rule Toronto 1949 only - Nov lastSun 0:00 0 S |
| 1377 | Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D |
| 1378 | Rule Toronto 1950 only - Nov lastSun 2:00 0 S |
| 1379 | Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S |
| 1380 | # Shanks & Pottenger say Toronto ended DST a week early in 1971, |
| 1381 | # namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this |
| 1382 | # is wrong, and that he had confirmed it by checking the 1971-10-30 |
| 1383 | # Toronto Star, which said that DST was ending 1971-10-31 as usual. |
| 1384 | Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S |
| 1385 | |
| 1386 | # From Paul Eggert (2003-07-27): |
| 1387 | # Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and |
| 1388 | # Port Arthur, Ontario, the principle of the Bill has been in |
| 1389 | # operation for the past three years, and in the City of Moose Jaw, |
| 1390 | # Saskatchewan, for one year." |
| 1391 | |
| 1392 | # From David Bryan via Tory Tronrud, Director/Curator, |
| 1393 | # Thunder Bay Museum (2003-11-12): |
| 1394 | # There is some suggestion, however, that, by-law or not, daylight |
| 1395 | # savings time was being practiced in Fort William and Port Arthur |
| 1396 | # before 1909.... [I]n 1910, the line between the Eastern and Central |
| 1397 | # Time Zones was permanently moved about two hundred miles west to |
| 1398 | # include the Thunder Bay area.... When Canada adopted daylight |
| 1399 | # savings time in 1916, Fort William and Port Arthur, having done so |
| 1400 | # already, did not change their clocks.... During the Second World |
| 1401 | # War,... [t]he cities agreed to implement DST during the summer |
| 1402 | # months for the remainder of the war years. |
| 1403 | |
| 1404 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 1405 | Zone America/Toronto -5:17:32 - LMT 1895 |
| 1406 | -5:00 Canada E%sT 1919 |
| 1407 | -5:00 Toronto E%sT 1942 Feb 9 2:00s |
| 1408 | -5:00 Canada E%sT 1946 |
| 1409 | -5:00 Toronto E%sT 1974 |
| 1410 | -5:00 Canada E%sT |
| 1411 | Zone America/Thunder_Bay -5:57:00 - LMT 1895 |
| 1412 | -6:00 - CST 1910 |
| 1413 | -5:00 - EST 1942 |
| 1414 | -5:00 Canada E%sT 1970 |
| 1415 | -5:00 Mont E%sT 1973 |
| 1416 | -5:00 - EST 1974 |
| 1417 | -5:00 Canada E%sT |
| 1418 | Zone America/Nipigon -5:53:04 - LMT 1895 |
| 1419 | -5:00 Canada E%sT 1940 Sep 29 |
| 1420 | -5:00 1:00 EDT 1942 Feb 9 2:00s |
| 1421 | -5:00 Canada E%sT |
| 1422 | Zone America/Rainy_River -6:18:16 - LMT 1895 |
| 1423 | -6:00 Canada C%sT 1940 Sep 29 |
| 1424 | -6:00 1:00 CDT 1942 Feb 9 2:00s |
| 1425 | -6:00 Canada C%sT |
| 1426 | Zone America/Atikokan -6:06:28 - LMT 1895 |
| 1427 | -6:00 Canada C%sT 1940 Sep 29 |
| 1428 | -6:00 1:00 CDT 1942 Feb 9 2:00s |
| 1429 | -6:00 Canada C%sT 1945 Sep 30 2:00 |
| 1430 | -5:00 - EST |
| 1431 | |
| 1432 | |
| 1433 | # Manitoba |
| 1434 | |
| 1435 | # From Rob Douglas (2006-04-06): |
| 1436 | # the old Manitoba Time Act - as amended by Bill 2, assented to |
| 1437 | # March 27, 1987 ... said ... |
| 1438 | # "between two o'clock Central Standard Time in the morning of |
| 1439 | # the first Sunday of April of each year and two o'clock Central |
| 1440 | # Standard Time in the morning of the last Sunday of October next |
| 1441 | # following, one hour in advance of Central Standard Time."... |
| 1442 | # I believe that the English legislation [of the old time act] had = |
| 1443 | # been assented to (March 22, 1967).... |
| 1444 | # Also, as far as I can tell, there was no order-in-council varying |
| 1445 | # the time of Daylight Saving Time for 2005 and so the provisions of |
| 1446 | # the 1987 version would apply - the changeover was at 2:00 Central |
| 1447 | # Standard Time (i.e. not until 3:00 Central Daylight Time). |
| 1448 | |
| 1449 | # From Paul Eggert (2006-04-10): |
| 1450 | # Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) |
| 1451 | # starting 1966. Since 02:00s is clearly correct for 1967 on, assume |
| 1452 | # it was also 02:00s in 1966. |
| 1453 | |
| 1454 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
| 1455 | Rule Winn 1916 only - Apr 23 0:00 1:00 D |
| 1456 | Rule Winn 1916 only - Sep 17 0:00 0 S |
| 1457 | Rule Winn 1918 only - Apr 14 2:00 1:00 D |
| 1458 | Rule Winn 1918 only - Oct 31 2:00 0 S |
| 1459 | Rule Winn 1937 only - May 16 2:00 1:00 D |
| 1460 | Rule Winn 1937 only - Sep 26 2:00 0 S |
| 1461 | Rule Winn 1942 only - Feb 9 2:00 1:00 W # War |
| 1462 | Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace |
| 1463 | Rule Winn 1945 only - Sep lastSun 2:00 0 S |
| 1464 | Rule Winn 1946 only - May 12 2:00 1:00 D |
| 1465 | Rule Winn 1946 only - Oct 13 2:00 0 S |
| 1466 | Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D |
| 1467 | Rule Winn 1947 1949 - Sep lastSun 2:00 0 S |
| 1468 | Rule Winn 1950 only - May 1 2:00 1:00 D |
| 1469 | Rule Winn 1950 only - Sep 30 2:00 0 S |
| 1470 | Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D |
| 1471 | Rule Winn 1951 1958 - Sep lastSun 2:00 0 S |
| 1472 | Rule Winn 1959 only - Oct lastSun 2:00 0 S |
| 1473 | Rule Winn 1960 only - Sep lastSun 2:00 0 S |
| 1474 | Rule Winn 1963 only - Apr lastSun 2:00 1:00 D |
| 1475 | Rule Winn 1963 only - Sep 22 2:00 0 S |
| 1476 | Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D |
| 1477 | Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S |
| 1478 | Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D |
| 1479 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 1480 | Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 |
| 1481 | -6:00 Winn C%sT 2006 |
| 1482 | -6:00 Canada C%sT |
| 1483 | |
| 1484 | |
| 1485 | # Saskatchewan |
| 1486 | |
| 1487 | # From Mark Brader (2003-07-26): |
| 1488 | # The first actual adoption of DST in Canada was at the municipal |
| 1489 | # level. As the [Toronto] Star put it (1912-06-07), "While people |
| 1490 | # elsewhere have long been talking of legislation to save daylight, |
| 1491 | # the city of Moose Jaw [Saskatchewan] has acted on its own hook." |
| 1492 | # DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: |
| 1493 | # presumably late evening, as below), and would run until "the end of |
| 1494 | # the summer". The discrepancy between municipal time and railroad |
| 1495 | # time was noted. |
| 1496 | |
| 1497 | # From Paul Eggert (2003-07-27): |
| 1498 | # Willett (1914-03) notes that DST "has been in operation ... in the |
| 1499 | # City of Moose Jaw, Saskatchewan, for one year." |
| 1500 | |
| 1501 | # From Paul Eggert (2006-03-22): |
| 1502 | # Shanks & Pottenger say that since 1970 this region has mostly been as Regina. |
| 1503 | # Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. |
| 1504 | # Other western towns (e.g. Lloydminster) are like Edmonton. |
| 1505 | # Matthews and Vincent (1998) write that Denare Beach and Creighton |
| 1506 | # are like Winnipeg, in violation of Saskatchewan law. |
| 1507 | |
| 1508 | # From W. Jones (1992-11-06): |
| 1509 | # The. . .below is based on information I got from our law library, the |
| 1510 | # provincial archives, and the provincial Community Services department. |
| 1511 | # A precise history would require digging through newspaper archives, and |
| 1512 | # since you didn't say what you wanted, I didn't bother. |
| 1513 | # |
| 1514 | # Saskatchewan is split by a time zone meridian (105W) and over the years |
| 1515 | # the boundary became pretty ragged as communities near it reevaluated |
| 1516 | # their affiliations in one direction or the other. In 1965 a provincial |
| 1517 | # referendum favoured legislating common time practices. |
| 1518 | # |
| 1519 | # On 15 April 1966 the Time Act (c. T-14, Revised Statutes of |
| 1520 | # Saskatchewan 1978) was proclaimed, and established that the eastern |
| 1521 | # part of Saskatchewan would use CST year round, that districts in |
| 1522 | # northwest Saskatchewan would by default follow CST but could opt to |
| 1523 | # follow Mountain Time rules (thus 1 hour difference in the winter and |
| 1524 | # zero in the summer), and that districts in southwest Saskatchewan would |
| 1525 | # by default follow MT but could opt to follow CST. |
| 1526 | # |
| 1527 | # It took a few years for the dust to settle (I know one story of a town |
| 1528 | # on one time zone having its school in another, such that a mom had to |
| 1529 | # serve her family lunch in two shifts), but presently it seems that only |
| 1530 | # a few towns on the border with Alberta (e.g. Lloydminster) follow MT |
| 1531 | # rules any more; all other districts appear to have used CST year round |
| 1532 | # since sometime in the 1960s. |
| 1533 | |
| 1534 | # From Chris Walton (2006-06-26): |
| 1535 | # The Saskatchewan time act which was last updated in 1996 is about 30 pages |
| 1536 | # long and rather painful to read. |
| 1537 | # http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf |
| 1538 | |
| 1539 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
| 1540 | Rule Regina 1918 only - Apr 14 2:00 1:00 D |
| 1541 | Rule Regina 1918 only - Oct 31 2:00 0 S |
| 1542 | Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D |
| 1543 | Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S |
| 1544 | Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D |
| 1545 | Rule Regina 1937 only - Oct Sun>=8 0:00 0 S |
| 1546 | Rule Regina 1938 only - Oct Sun>=1 0:00 0 S |
| 1547 | Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S |
| 1548 | Rule Regina 1942 only - Feb 9 2:00 1:00 W # War |
| 1549 | Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace |
| 1550 | Rule Regina 1945 only - Sep lastSun 2:00 0 S |
| 1551 | Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D |
| 1552 | Rule Regina 1946 only - Oct Sun>=8 2:00 0 S |
| 1553 | Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D |
| 1554 | Rule Regina 1947 1957 - Sep lastSun 2:00 0 S |
| 1555 | Rule Regina 1959 only - Apr lastSun 2:00 1:00 D |
| 1556 | Rule Regina 1959 only - Oct lastSun 2:00 0 S |
| 1557 | # |
| 1558 | Rule Swift 1957 only - Apr lastSun 2:00 1:00 D |
| 1559 | Rule Swift 1957 only - Oct lastSun 2:00 0 S |
| 1560 | Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D |
| 1561 | Rule Swift 1959 only - Oct lastSun 2:00 0 S |
| 1562 | Rule Swift 1960 1961 - Sep lastSun 2:00 0 S |
| 1563 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 1564 | Zone America/Regina -6:58:36 - LMT 1905 Sep |
| 1565 | -7:00 Regina M%sT 1960 Apr lastSun 2:00 |
| 1566 | -6:00 - CST |
| 1567 | Zone America/Swift_Current -7:11:20 - LMT 1905 Sep |
| 1568 | -7:00 Canada M%sT 1946 Apr lastSun 2:00 |
| 1569 | -7:00 Regina M%sT 1950 |
| 1570 | -7:00 Swift M%sT 1972 Apr lastSun 2:00 |
| 1571 | -6:00 - CST |
| 1572 | |
| 1573 | |
| 1574 | # Alberta |
| 1575 | |
| 1576 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
| 1577 | Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D |
| 1578 | Rule Edm 1918 only - Oct 31 2:00 0 S |
| 1579 | Rule Edm 1919 only - May 27 2:00 0 S |
| 1580 | Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D |
| 1581 | Rule Edm 1920 only - Oct lastSun 2:00 0 S |
| 1582 | Rule Edm 1921 1923 - Sep lastSun 2:00 0 S |
| 1583 | Rule Edm 1942 only - Feb 9 2:00 1:00 W # War |
| 1584 | Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace |
| 1585 | Rule Edm 1945 only - Sep lastSun 2:00 0 S |
| 1586 | Rule Edm 1947 only - Apr lastSun 2:00 1:00 D |
| 1587 | Rule Edm 1947 only - Sep lastSun 2:00 0 S |
| 1588 | Rule Edm 1967 only - Apr lastSun 2:00 1:00 D |
| 1589 | Rule Edm 1967 only - Oct lastSun 2:00 0 S |
| 1590 | Rule Edm 1969 only - Apr lastSun 2:00 1:00 D |
| 1591 | Rule Edm 1969 only - Oct lastSun 2:00 0 S |
| 1592 | Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D |
| 1593 | Rule Edm 1972 2006 - Oct lastSun 2:00 0 S |
| 1594 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 1595 | Zone America/Edmonton -7:33:52 - LMT 1906 Sep |
| 1596 | -7:00 Edm M%sT 1987 |
| 1597 | -7:00 Canada M%sT |
| 1598 | |
| 1599 | |
| 1600 | # British Columbia |
| 1601 | |
| 1602 | # From Paul Eggert (2006-03-22): |
| 1603 | # Shanks & Pottenger write that since 1970 most of this region has |
| 1604 | # been like Vancouver. |
| 1605 | # Dawson Creek uses MST. Much of east BC is like Edmonton. |
| 1606 | # Matthews and Vincent (1998) write that Creston is like Dawson Creek. |
| 1607 | |
| 1608 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
| 1609 | Rule Vanc 1918 only - Apr 14 2:00 1:00 D |
| 1610 | Rule Vanc 1918 only - Oct 31 2:00 0 S |
| 1611 | Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War |
| 1612 | Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace |
| 1613 | Rule Vanc 1945 only - Sep 30 2:00 0 S |
| 1614 | Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D |
| 1615 | Rule Vanc 1946 only - Oct 13 2:00 0 S |
| 1616 | Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S |
| 1617 | Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S |
| 1618 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 1619 | Zone America/Vancouver -8:12:28 - LMT 1884 |
| 1620 | -8:00 Vanc P%sT 1987 |
| 1621 | -8:00 Canada P%sT |
| 1622 | Zone America/Dawson_Creek -8:00:56 - LMT 1884 |
| 1623 | -8:00 Canada P%sT 1947 |
| 1624 | -8:00 Vanc P%sT 1972 Aug 30 2:00 |
| 1625 | -7:00 - MST |
| 1626 | |
| 1627 | |
| 1628 | # Northwest Territories, Nunavut, Yukon |
| 1629 | |
| 1630 | # From Paul Eggert (2006-03-22): |
| 1631 | # Dawson switched to PST in 1973. Inuvik switched to MST in 1979. |
| 1632 | # Mathew Englander (1996-10-07) gives the following refs: |
| 1633 | # * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, |
| 1634 | # c. 7 defines Yukon standard time as UTC-9. This is still valid; |
| 1635 | # see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). |
| 1636 | # * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. |
| 1637 | # * O.I.C. 1980/02 established DST. |
| 1638 | # * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. |
| 1639 | # Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go |
| 1640 | # with Englander. |
| 1641 | # From Chris Walton (2006-06-26): |
| 1642 | # Here is a link to the old daylight saving portion of the interpretation |
| 1643 | # act which was last updated in 1987: |
| 1644 | # http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf |
| 1645 | |
| 1646 | # From Rives McDow (1999-09-04): |
| 1647 | # Nunavut ... moved ... to incorporate the whole territory into one time zone. |
| 1648 | # <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html"> |
| 1649 | # Nunavut moves to single time zone Oct. 31 |
| 1650 | # </a> |
| 1651 | # |
| 1652 | # From Antoine Leca (1999-09-06): |
| 1653 | # We then need to create a new timezone for the Kitikmeot region of Nunavut |
| 1654 | # to differentiate it from the Yellowknife region. |
| 1655 | |
| 1656 | # From Paul Eggert (1999-09-20): |
| 1657 | # <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html"> |
| 1658 | # Basic Facts: The New Territory |
| 1659 | # </a> (1999) reports that Pangnirtung operates on eastern time, |
| 1660 | # and that Coral Harbour does not observe DST. We don't know when |
| 1661 | # Pangnirtung switched to eastern time; we'll guess 1995. |
| 1662 | |
| 1663 | # From Rives McDow (1999-11-08): |
| 1664 | # On October 31, when the rest of Nunavut went to Central time, |
| 1665 | # Pangnirtung wobbled. Here is the result of their wobble: |
| 1666 | # |
| 1667 | # The following businesses and organizations in Pangnirtung use Central Time: |
| 1668 | # |
| 1669 | # First Air, Power Corp, Nunavut Construction, Health Center, RCMP, |
| 1670 | # Eastern Arctic National Parks, A & D Specialist |
| 1671 | # |
| 1672 | # The following businesses and organizations in Pangnirtung use Eastern Time: |
| 1673 | # |
| 1674 | # Hamlet office, All other businesses, Both schools, Airport operator |
| 1675 | # |
| 1676 | # This has made for an interesting situation there, which warranted the news. |
| 1677 | # No one there that I spoke with seems concerned, or has plans to |
| 1678 | # change the local methods of keeping time, as it evidently does not |
| 1679 | # really interfere with any activities or make things difficult locally. |
| 1680 | # They plan to celebrate New Year's turn-over twice, one hour apart, |
| 1681 | # so it appears that the situation will last at least that long. |
| 1682 | # The Nunavut Intergovernmental Affairs hopes that they will "come to |
| 1683 | # their senses", but the locals evidently don't see any problem with |
| 1684 | # the current state of affairs. |
| 1685 | |
| 1686 | # From Michaela Rodrigue, writing in the |
| 1687 | # <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html"> |
| 1688 | # Nunatsiaq News (1999-11-19)</a>: |
| 1689 | # Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, |
| 1690 | # central - or Nunavut time - for government offices, and eastern time |
| 1691 | # for municipal offices and schools.... Igloolik [was similar but then] |
| 1692 | # made the switch to central time on Saturday, Nov. 6. |
| 1693 | |
| 1694 | # From Paul Eggert (2000-10-02): |
| 1695 | # Matthews and Vincent (1998) say the following, but we lack histories |
| 1696 | # for these potential new Zones. |
| 1697 | # |
| 1698 | # The Canadian Forces station at Alert uses Eastern Time while the |
| 1699 | # handful of residents at the Eureka weather station [in the Central |
| 1700 | # zone] skip daylight savings. Baffin Island, which is crossed by the |
| 1701 | # Central, Eastern and Atlantic Time zones only uses Eastern Time. |
| 1702 | # Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of |
| 1703 | # Central Time and Southampton Island [in the Central zone] is not |
| 1704 | # required to use daylight savings. |
| 1705 | |
| 1706 | # From |
| 1707 | # <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html"> |
| 1708 | # Nunavut now has two time zones |
| 1709 | # </a> (2000-11-10): |
| 1710 | # The Nunavut government would allow its employees in Kugluktuk and |
| 1711 | # Cambridge Bay to operate on central time year-round, putting them |
| 1712 | # one hour behind the rest of Nunavut for six months during the winter. |
| 1713 | # At the end of October the two communities had rebelled against |
| 1714 | # Nunavut's unified time zone, refusing to shift to eastern time with |
| 1715 | # the rest of the territory for the winter. Cambridge Bay remained on |
| 1716 | # central time, while Kugluktuk, even farther west, reverted to |
| 1717 | # mountain time, which they had used before the advent of Nunavut's |
| 1718 | # unified time zone in 1999. |
| 1719 | # |
| 1720 | # From Rives McDow (2001-01-20), quoting the Nunavut government: |
| 1721 | # The preceding decision came into effect at midnight, Saturday Nov 4, 2000. |
| 1722 | |
| 1723 | # From Paul Eggert (2000-12-04): |
| 1724 | # Let's just keep track of the official times for now. |
| 1725 | |
| 1726 | # From Rives McDow (2001-03-07): |
| 1727 | # The premier of Nunavut has issued a ministerial statement advising |
| 1728 | # that effective 2001-04-01, the territory of Nunavut will revert |
| 1729 | # back to three time zones (mountain, central, and eastern). Of the |
| 1730 | # cities in Nunavut, Coral Harbor is the only one that I know of that |
| 1731 | # has said it will not observe dst, staying on EST year round. I'm |
| 1732 | # checking for more info, and will get back to you if I come up with |
| 1733 | # more. |
| 1734 | # [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] |
| 1735 | |
| 1736 | # From Gwillim Law (2005-05-21): |
| 1737 | # According to maps at |
| 1738 | # http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg |
| 1739 | # http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg |
| 1740 | # (both dated 2003), and |
| 1741 | # http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp |
| 1742 | # (from a 1998 Canadian Geographic article), the de facto and de jure time |
| 1743 | # for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year |
| 1744 | # round. Using Google, it's easy to find other websites that confirm this. |
| 1745 | # I wasn't able to find how far back this time regimen goes, but since it |
| 1746 | # predates the creation of Nunavut, it probably goes back many years.... |
| 1747 | # The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. |
| 1748 | # |
| 1749 | # From Paul Eggert (2005-07-26): |
| 1750 | # For lack of better information, assume that Southampton Island observed |
| 1751 | # daylight saving only during wartime. |
| 1752 | |
| 1753 | # From Chris Walton (2007-03-01): |
| 1754 | # ... the community of Resolute (located on Cornwallis Island in |
| 1755 | # Nunavut) moved from Central Time to Eastern Time last November. |
| 1756 | # Basically the community did not change its clocks at the end of |
| 1757 | # daylight saving.... |
| 1758 | # http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html |
| 1759 | |
| 1760 | # From Chris Walton (2007-03-14): |
| 1761 | # Today I phoned the "hamlet office" to find out what Resolute was doing with |
| 1762 | # its clocks. |
| 1763 | # |
| 1764 | # The individual that answered the phone confirmed that the clocks did not |
| 1765 | # move at the end of daylight saving on October 29/2006. He also told me that |
| 1766 | # the clocks did not move this past weekend (March 11/2007).... |
| 1767 | # |
| 1768 | # America/Resolute should use the "Canada" Rule up to October 29/2006. |
| 1769 | # After that it should be fixed on Eastern Standard Time until further notice. |
| 1770 | |
| 1771 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
| 1772 | Rule NT_YK 1918 only - Apr 14 2:00 1:00 D |
| 1773 | Rule NT_YK 1918 only - Oct 27 2:00 0 S |
| 1774 | Rule NT_YK 1919 only - May 25 2:00 1:00 D |
| 1775 | Rule NT_YK 1919 only - Nov 1 0:00 0 S |
| 1776 | Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War |
| 1777 | Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace |
| 1778 | Rule NT_YK 1945 only - Sep 30 2:00 0 S |
| 1779 | Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD |
| 1780 | Rule NT_YK 1965 only - Oct lastSun 2:00 0 S |
| 1781 | Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D |
| 1782 | Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S |
| 1783 | Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D |
| 1784 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 1785 | # aka Panniqtuuq |
| 1786 | Zone America/Pangnirtung 0 - zzz 1921 # trading post est. |
| 1787 | -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 |
| 1788 | -5:00 Canada E%sT 1999 Oct 31 2:00 |
| 1789 | -6:00 Canada C%sT 2000 Oct 29 2:00 |
| 1790 | -5:00 Canada E%sT |
| 1791 | # formerly Frobisher Bay |
| 1792 | Zone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est. |
| 1793 | -5:00 NT_YK E%sT 1999 Oct 31 2:00 |
| 1794 | -6:00 Canada C%sT 2000 Oct 29 2:00 |
| 1795 | -5:00 Canada E%sT |
| 1796 | # aka Qausuittuq |
| 1797 | Zone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded |
| 1798 | -6:00 NT_YK C%sT 2000 Oct 29 2:00 |
| 1799 | -5:00 - EST 2001 Apr 1 3:00 |
| 1800 | -6:00 Canada C%sT 2006 Oct 29 2:00 |
| 1801 | -5:00 - EST |
| 1802 | # aka Kangiqiniq |
| 1803 | Zone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded |
| 1804 | -6:00 NT_YK C%sT 2000 Oct 29 2:00 |
| 1805 | -5:00 - EST 2001 Apr 1 3:00 |
| 1806 | -6:00 Canada C%sT |
| 1807 | # aka Iqaluktuuttiaq |
| 1808 | Zone America/Cambridge_Bay 0 - zzz 1920 # trading post est.? |
| 1809 | -7:00 NT_YK M%sT 1999 Oct 31 2:00 |
| 1810 | -6:00 Canada C%sT 2000 Oct 29 2:00 |
| 1811 | -5:00 - EST 2000 Nov 5 0:00 |
| 1812 | -6:00 - CST 2001 Apr 1 3:00 |
| 1813 | -7:00 Canada M%sT |
| 1814 | Zone America/Yellowknife 0 - zzz 1935 # Yellowknife founded? |
| 1815 | -7:00 NT_YK M%sT 1980 |
| 1816 | -7:00 Canada M%sT |
| 1817 | Zone America/Inuvik 0 - zzz 1953 # Inuvik founded |
| 1818 | -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 |
| 1819 | -7:00 NT_YK M%sT 1980 |
| 1820 | -7:00 Canada M%sT |
| 1821 | Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 |
| 1822 | -9:00 NT_YK Y%sT 1966 Jul 1 2:00 |
| 1823 | -8:00 NT_YK P%sT 1980 |
| 1824 | -8:00 Canada P%sT |
| 1825 | Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 |
| 1826 | -9:00 NT_YK Y%sT 1973 Oct 28 0:00 |
| 1827 | -8:00 NT_YK P%sT 1980 |
| 1828 | -8:00 Canada P%sT |
| 1829 | |
| 1830 | |
| 1831 | ############################################################################### |
| 1832 | |
| 1833 | # Mexico |
| 1834 | |
| 1835 | # From Paul Eggert (2001-03-05): |
| 1836 | # The Investigation and Analysis Service of the |
| 1837 | # Mexican Library of Congress (MLoC) has published a |
| 1838 | # <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/"> |
| 1839 | # history of Mexican local time (in Spanish) |
| 1840 | # </a>. |
| 1841 | # |
| 1842 | # Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. |
| 1843 | # (In all cases we go with the MLoC.) |
| 1844 | # S&P report that Baja was at -8:00 in 1922/1923. |
| 1845 | # S&P say the 1930 transition in Baja was 1930-11-16. |
| 1846 | # S&P report no DST during summer 1931. |
| 1847 | # S&P report a transition at 1932-03-30 23:00, not 1932-04-01. |
| 1848 | |
| 1849 | # From Gwillim Law (2001-02-20): |
| 1850 | # There are some other discrepancies between the Decrees page and the |
| 1851 | # tz database. I think they can best be explained by supposing that |
| 1852 | # the researchers who prepared the Decrees page failed to find some of |
| 1853 | # the relevant documents. |
| 1854 | |
| 1855 | # From Alan Perry (1996-02-15): |
| 1856 | # A guy from our Mexico subsidiary finally found the Presidential Decree |
| 1857 | # outlining the timezone changes in Mexico. |
| 1858 | # |
| 1859 | # ------------- Begin Forwarded Message ------------- |
| 1860 | # |
| 1861 | # I finally got my hands on the Official Presidential Decree that sets up the |
| 1862 | # rules for the DST changes. The rules are: |
| 1863 | # |
| 1864 | # 1. The country is divided in 3 timezones: |
| 1865 | # - Baja California Norte (the Mexico/BajaNorte TZ) |
| 1866 | # - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) |
| 1867 | # - The rest of the country (the Mexico/General TZ) |
| 1868 | # |
| 1869 | # 2. From the first Sunday in April at 2:00 AM to the last Sunday in October |
| 1870 | # at 2:00 AM, the times in each zone are as follows: |
| 1871 | # BajaNorte: GMT+7 |
| 1872 | # BajaSur: GMT+6 |
| 1873 | # General: GMT+5 |
| 1874 | # |
| 1875 | # 3. The rest of the year, the times are as follows: |
| 1876 | # BajaNorte: GMT+8 |
| 1877 | # BajaSur: GMT+7 |
| 1878 | # General: GMT+6 |
| 1879 | # |
| 1880 | # The Decree was published in Mexico's Official Newspaper on January 4th. |
| 1881 | # |
| 1882 | # -------------- End Forwarded Message -------------- |
| 1883 | # From Paul Eggert (1996-06-12): |
| 1884 | # For an English translation of the decree, see |
| 1885 | # <a href="http://mexico-travel.com/extra/timezone_eng.html"> |
| 1886 | # ``Diario Oficial: Time Zone Changeover'' (1996-01-04). |
| 1887 | # </a> |
| 1888 | |
| 1889 | # From Rives McDow (1998-10-08): |
| 1890 | # The State of Quintana Roo has reverted back to central STD and DST times |
| 1891 | # (i.e. UTC -0600 and -0500 as of 1998-08-02). |
| 1892 | |
| 1893 | # From Rives McDow (2000-01-10): |
| 1894 | # Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time |
| 1895 | # zone 5 hours from the International Date Line, and will not observe daylight |
| 1896 | # savings time so as to stay on the same time zone as the southern part of |
| 1897 | # Arizona year round. |
| 1898 | |
| 1899 | # From Jesper Norgaard, translating |
| 1900 | # <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): |
| 1901 | # In Oaxaca, the 55.000 teachers from the Section 22 of the National |
| 1902 | # Syndicate of Education Workers, refuse to apply daylight saving each |
| 1903 | # year, so that the more than 10,000 schools work at normal hour the |
| 1904 | # whole year. |
| 1905 | |
| 1906 | # From Gwillim Law (2001-01-19): |
| 1907 | # <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says |
| 1908 | # (translated):... |
| 1909 | # January 17, 2000 - The Energy Secretary, Ernesto Martens, announced |
| 1910 | # that Summer Time will be reduced from seven to five months, starting |
| 1911 | # this year.... |
| 1912 | # <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001> |
| 1913 | # [translated], says "summer time will ... take effect on the first Sunday |
| 1914 | # in May, and end on the last Sunday of September. |
| 1915 | |
| 1916 | # From Arthur David Olson (2001-01-25): |
| 1917 | # The 2001-01-24 traditional Washington Post contained the page one |
| 1918 | # story "Timely Issue Divides Mexicans."... |
| 1919 | # http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html |
| 1920 | # ... Mexico City Mayor Lopez Obrador "...is threatening to keep |
| 1921 | # Mexico City and its 20 million residents on a different time than |
| 1922 | # the rest of the country..." In particular, Lopez Obrador would abolish |
| 1923 | # observation of Daylight Saving Time. |
| 1924 | |
| 1925 | # <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre"> |
| 1926 | # Official statute published by the Energy Department |
| 1927 | # </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules, |
| 1928 | # and Sonora with no DST. This was reported by Jesper Norgaard (2001-02-03). |
| 1929 | |
| 1930 | # From Paul Eggert (2001-03-03): |
| 1931 | # |
| 1932 | # <a href="http://www.latimes.com/news/nation/20010303/t000018766.html"> |
| 1933 | # James F. Smith writes in today's LA Times |
| 1934 | # </a> |
| 1935 | # * Sonora will continue to observe standard time. |
| 1936 | # * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that |
| 1937 | # the Federal District will not adopt DST. |
| 1938 | # * 4 of 16 district leaders announced they'll ignore the decree. |
| 1939 | # * The decree does not affect federal-controlled facilities including |
| 1940 | # the airport, banks, hospitals, and schools. |
| 1941 | # |
| 1942 | # For now we'll assume that the Federal District will bow to federal rules. |
| 1943 | |
| 1944 | # From Jesper Norgaard (2001-04-01): |
| 1945 | # I found some references to the Mexican application of daylight |
| 1946 | # saving, which modifies what I had already sent you, stating earlier |
| 1947 | # that a number of northern Mexican states would go on daylight |
| 1948 | # saving. The modification reverts this to only cover Baja California |
| 1949 | # (Norte), while all other states (except Sonora, who has no daylight |
| 1950 | # saving all year) will follow the original decree of president |
| 1951 | # Vicente Fox, starting daylight saving May 6, 2001 and ending |
| 1952 | # September 30, 2001. |
| 1953 | # References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp> |
| 1954 | # Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) |
| 1955 | |
| 1956 | # From Reuters (2001-09-04): |
| 1957 | # Mexico's Supreme Court on Tuesday declared that daylight savings was |
| 1958 | # unconstitutional in Mexico City, creating the possibility the |
| 1959 | # capital will be in a different time zone from the rest of the nation |
| 1960 | # next year.... The Supreme Court's ruling takes effect at 2:00 |
| 1961 | # a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to |
| 1962 | # standard time. "This is so residents of the Federal District are not |
| 1963 | # subject to unexpected time changes," a statement from the court said. |
| 1964 | |
| 1965 | # From Jesper Norgaard Welen (2002-03-12): |
| 1966 | # ... consulting my local grocery store(!) and my coworkers, they all insisted |
| 1967 | # that a new decision had been made to reinstate US style DST in Mexico.... |
| 1968 | # http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) |
| 1969 | # confirms this. Sonora as usual is the only state where DST is not applied. |
| 1970 | |
| 1971 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
| 1972 | Rule Mexico 1939 only - Feb 5 0:00 1:00 D |
| 1973 | Rule Mexico 1939 only - Jun 25 0:00 0 S |
| 1974 | Rule Mexico 1940 only - Dec 9 0:00 1:00 D |
| 1975 | Rule Mexico 1941 only - Apr 1 0:00 0 S |
| 1976 | Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War |
| 1977 | Rule Mexico 1944 only - May 1 0:00 0 S |
| 1978 | Rule Mexico 1950 only - Feb 12 0:00 1:00 D |
| 1979 | Rule Mexico 1950 only - Jul 30 0:00 0 S |
| 1980 | Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D |
| 1981 | Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S |
| 1982 | Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D |
| 1983 | Rule Mexico 2001 only - Sep lastSun 2:00 0 S |
| 1984 | Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D |
| 1985 | Rule Mexico 2002 max - Oct lastSun 2:00 0 S |
| 1986 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 1987 | # Quintana Roo |
| 1988 | Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 |
| 1989 | -6:00 - CST 1981 Dec 23 |
| 1990 | -5:00 Mexico E%sT 1998 Aug 2 2:00 |
| 1991 | -6:00 Mexico C%sT |
| 1992 | # Campeche, Yucatan |
| 1993 | Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 |
| 1994 | -6:00 - CST 1981 Dec 23 |
| 1995 | -5:00 - EST 1982 Dec 2 |
| 1996 | -6:00 Mexico C%sT |
| 1997 | # Coahuila, Durango, Nuevo Leon, Tamaulipas |
| 1998 | Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 |
| 1999 | -6:00 - CST 1988 |
| 2000 | -6:00 US C%sT 1989 |
| 2001 | -6:00 Mexico C%sT |
| 2002 | # Central Mexico |
| 2003 | Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 |
| 2004 | -7:00 - MST 1927 Jun 10 23:00 |
| 2005 | -6:00 - CST 1930 Nov 15 |
| 2006 | -7:00 - MST 1931 May 1 23:00 |
| 2007 | -6:00 - CST 1931 Oct |
| 2008 | -7:00 - MST 1932 Apr 1 |
| 2009 | -6:00 Mexico C%sT 2001 Sep 30 02:00 |
| 2010 | -6:00 - CST 2002 Feb 20 |
| 2011 | -6:00 Mexico C%sT |
| 2012 | # Chihuahua |
| 2013 | Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 |
| 2014 | -7:00 - MST 1927 Jun 10 23:00 |
| 2015 | -6:00 - CST 1930 Nov 15 |
| 2016 | -7:00 - MST 1931 May 1 23:00 |
| 2017 | -6:00 - CST 1931 Oct |
| 2018 | -7:00 - MST 1932 Apr 1 |
| 2019 | -6:00 - CST 1996 |
| 2020 | -6:00 Mexico C%sT 1998 |
| 2021 | -6:00 - CST 1998 Apr Sun>=1 3:00 |
| 2022 | -7:00 Mexico M%sT |
| 2023 | # Sonora |
| 2024 | Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 |
| 2025 | -7:00 - MST 1927 Jun 10 23:00 |
| 2026 | -6:00 - CST 1930 Nov 15 |
| 2027 | -7:00 - MST 1931 May 1 23:00 |
| 2028 | -6:00 - CST 1931 Oct |
| 2029 | -7:00 - MST 1932 Apr 1 |
| 2030 | -6:00 - CST 1942 Apr 24 |
| 2031 | -7:00 - MST 1949 Jan 14 |
| 2032 | -8:00 - PST 1970 |
| 2033 | -7:00 Mexico M%sT 1999 |
| 2034 | -7:00 - MST |
| 2035 | # Baja California Sur, Nayarit, Sinaloa |
| 2036 | Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 |
| 2037 | -7:00 - MST 1927 Jun 10 23:00 |
| 2038 | -6:00 - CST 1930 Nov 15 |
| 2039 | -7:00 - MST 1931 May 1 23:00 |
| 2040 | -6:00 - CST 1931 Oct |
| 2041 | -7:00 - MST 1932 Apr 1 |
| 2042 | -6:00 - CST 1942 Apr 24 |
| 2043 | -7:00 - MST 1949 Jan 14 |
| 2044 | -8:00 - PST 1970 |
| 2045 | -7:00 Mexico M%sT |
| 2046 | # Baja California |
| 2047 | Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 |
| 2048 | -7:00 - MST 1924 |
| 2049 | -8:00 - PST 1927 Jun 10 23:00 |
| 2050 | -7:00 - MST 1930 Nov 15 |
| 2051 | -8:00 - PST 1931 Apr 1 |
| 2052 | -8:00 1:00 PDT 1931 Sep 30 |
| 2053 | -8:00 - PST 1942 Apr 24 |
| 2054 | -8:00 1:00 PWT 1945 Aug 14 23:00u |
| 2055 | -8:00 1:00 PPT 1945 Nov 12 # Peace |
| 2056 | -8:00 - PST 1948 Apr 5 |
| 2057 | -8:00 1:00 PDT 1949 Jan 14 |
| 2058 | -8:00 - PST 1954 |
| 2059 | -8:00 CA P%sT 1961 |
| 2060 | -8:00 - PST 1976 |
| 2061 | -8:00 US P%sT 1996 |
| 2062 | -8:00 Mexico P%sT 2001 |
| 2063 | -8:00 US P%sT 2002 Feb 20 |
| 2064 | -8:00 Mexico P%sT |
| 2065 | # From Paul Eggert (2006-03-22): |
| 2066 | # Formerly there was an America/Ensenada zone, which differed from |
| 2067 | # America/Tijuana only in that it did not observe DST from 1976 |
| 2068 | # through 1995. This was as per Shanks (1999). But Shanks & Pottenger say |
| 2069 | # Ensenada did not observe DST from 1948 through 1975. Guy Harris reports |
| 2070 | # that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and |
| 2071 | # Tijuana observe DST," which agrees with Shanks & Pottenger but implies that |
| 2072 | # DST-observance was a town-by-town matter back then. This concerns |
| 2073 | # data after 1970 so most likely there should be at least one Zone |
| 2074 | # other than America/Tijuana for Baja, but it's not clear yet what its |
| 2075 | # name or contents should be. |
| 2076 | # |
| 2077 | # Revillagigedo Is |
| 2078 | # no information |
| 2079 | |
| 2080 | ############################################################################### |
| 2081 | |
| 2082 | # Anguilla |
| 2083 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2084 | Zone America/Anguilla -4:12:16 - LMT 1912 Mar 2 |
| 2085 | -4:00 - AST |
| 2086 | |
| 2087 | # Antigua and Barbuda |
| 2088 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2089 | Zone America/Antigua -4:07:12 - LMT 1912 Mar 2 |
| 2090 | -5:00 - EST 1951 |
| 2091 | -4:00 - AST |
| 2092 | |
| 2093 | # Bahamas |
| 2094 | # |
| 2095 | # From Sue Williams (2006-12-07): |
| 2096 | # The Bahamas announced about a month ago that they plan to change their DST |
| 2097 | # rules to sync with the U.S. starting in 2007.... |
| 2098 | # http://www.jonesbahamas.com/?c=45&a=10412 |
| 2099 | |
| 2100 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
| 2101 | Rule Bahamas 1964 2006 - Oct lastSun 2:00 0 S |
| 2102 | Rule Bahamas 1964 1986 - Apr lastSun 2:00 1:00 D |
| 2103 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2104 | Zone America/Nassau -5:09:24 - LMT 1912 Mar 2 |
| 2105 | -5:00 Bahamas E%sT 1976 |
| 2106 | -5:00 US E%sT |
| 2107 | |
| 2108 | # Barbados |
| 2109 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
| 2110 | Rule Barb 1977 only - Jun 12 2:00 1:00 D |
| 2111 | Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S |
| 2112 | Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D |
| 2113 | Rule Barb 1979 only - Sep 30 2:00 0 S |
| 2114 | Rule Barb 1980 only - Sep 25 2:00 0 S |
| 2115 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2116 | Zone America/Barbados -3:58:28 - LMT 1924 # Bridgetown |
| 2117 | -3:58:28 - BMT 1932 # Bridgetown Mean Time |
| 2118 | -4:00 Barb A%sT |
| 2119 | |
| 2120 | # Belize |
| 2121 | # Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. |
| 2122 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
| 2123 | Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD |
| 2124 | Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S |
| 2125 | Rule Belize 1973 only - Dec 5 0:00 1:00 D |
| 2126 | Rule Belize 1974 only - Feb 9 0:00 0 S |
| 2127 | Rule Belize 1982 only - Dec 18 0:00 1:00 D |
| 2128 | Rule Belize 1983 only - Feb 12 0:00 0 S |
| 2129 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2130 | Zone America/Belize -5:52:48 - LMT 1912 Apr |
| 2131 | -6:00 Belize C%sT |
| 2132 | |
| 2133 | # Bermuda |
| 2134 | |
| 2135 | # From Dan Jones, reporting in The Royal Gazette (2006-06-26): |
| 2136 | |
| 2137 | # Next year, however, clocks in the US will go forward on the second Sunday |
| 2138 | # in March, until the first Sunday in November. And, after the Time Zone |
| 2139 | # (Seasonal Variation) Bill 2006 was passed in the House of Assembly on |
| 2140 | # Friday, the same thing will happen in Bermuda. |
| 2141 | # http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 |
| 2142 | |
| 2143 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2144 | Zone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton |
| 2145 | -4:00 - AST 1974 Apr 28 2:00 |
| 2146 | -4:00 Bahamas A%sT 1976 |
| 2147 | -4:00 US A%sT |
| 2148 | |
| 2149 | # Cayman Is |
| 2150 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2151 | Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown |
| 2152 | -5:07:12 - KMT 1912 Feb # Kingston Mean Time |
| 2153 | -5:00 - EST |
| 2154 | |
| 2155 | # Costa Rica |
| 2156 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
| 2157 | Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D |
| 2158 | Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S |
| 2159 | Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D |
| 2160 | # IATA SSIM (1991-09) says the following was at 1:00; |
| 2161 | # go with Shanks & Pottenger. |
| 2162 | Rule CR 1991 only - Jul 1 0:00 0 S |
| 2163 | Rule CR 1992 only - Mar 15 0:00 0 S |
| 2164 | # There are too many San Joses elsewhere, so we'll use `Costa Rica'. |
| 2165 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2166 | Zone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose |
| 2167 | -5:36:20 - SJMT 1921 Jan 15 # San Jose Mean Time |
| 2168 | -6:00 CR C%sT |
| 2169 | # Coco |
| 2170 | # no information; probably like America/Costa_Rica |
| 2171 | |
| 2172 | # Cuba |
| 2173 | |
| 2174 | # From Arthur David Olson (1999-03-29): |
| 2175 | # The 1999-03-28 exhibition baseball game held in Havana, Cuba, between |
| 2176 | # the Cuban National Team and the Baltimore Orioles was carried live on |
| 2177 | # the Orioles Radio Network, including affiliate WTOP in Washington, DC. |
| 2178 | # During the game, play-by-play announcer Jim Hunter noted that |
| 2179 | # "We'll be losing two hours of sleep...Cuba switched to Daylight Saving |
| 2180 | # Time today." (The "two hour" remark referred to losing one hour of |
| 2181 | # sleep on 1999-03-28--when the announcers were in Cuba as it switched |
| 2182 | # to DST--and one more hour on 1999-04-04--when the announcers will have |
| 2183 | # returned to Baltimore, which switches on that date.) |
| 2184 | |
| 2185 | # From Evert van der Veer via Steffen Thorsen (2004-10-28): |
| 2186 | # Cuba is not going back to standard time this year. |
| 2187 | # From Paul Eggert (2006-03-22): |
| 2188 | # http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html |
| 2189 | # says that it's due to a problem at the Antonio Guiteras |
| 2190 | # thermoelectric plant, and says "This October there will be no return |
| 2191 | # to normal hours (after daylight saving time)". |
| 2192 | # For now, let's assume that it's a temporary measure. |
| 2193 | |
| 2194 | # From Carlos A. Carnero Delgado (2005-11-12): |
| 2195 | # This year (just like in 2004-2005) there's no change in time zone |
| 2196 | # adjustment in Cuba. We will stay in daylight saving time: |
| 2197 | # http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html |
| 2198 | |
| 2199 | # From Jesper Norgaard Welen (2006-10-21): |
| 2200 | # An article in GRANMA INTERNACIONAL claims that Cuba will end |
| 2201 | # the 3 years of permanent DST next weekend, see |
| 2202 | # http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html |
| 2203 | # "On Saturday night, October 28 going into Sunday, October 29, at 01:00, |
| 2204 | # watches should be set back one hour -- going back to 00:00 hours -- returning |
| 2205 | # to the normal schedule.... |
| 2206 | |
| 2207 | # From Paul Eggert (2007-03-02): |
| 2208 | # http://www.granma.cubaweb.cu/english/news/art89.html, dated yesterday, |
| 2209 | # says Cuban clocks will advance at midnight on March 10. |
| 2210 | # For lack of better information, assume Cuba will use US rules, |
| 2211 | # except that it switches at midnight standard time as usual. |
| 2212 | |
| 2213 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
| 2214 | Rule Cuba 1928 only - Jun 10 0:00 1:00 D |
| 2215 | Rule Cuba 1928 only - Oct 10 0:00 0 S |
| 2216 | Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D |
| 2217 | Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S |
| 2218 | Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D |
| 2219 | Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S |
| 2220 | Rule Cuba 1965 only - Jun 1 0:00 1:00 D |
| 2221 | Rule Cuba 1965 only - Sep 30 0:00 0 S |
| 2222 | Rule Cuba 1966 only - May 29 0:00 1:00 D |
| 2223 | Rule Cuba 1966 only - Oct 2 0:00 0 S |
| 2224 | Rule Cuba 1967 only - Apr 8 0:00 1:00 D |
| 2225 | Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S |
| 2226 | Rule Cuba 1968 only - Apr 14 0:00 1:00 D |
| 2227 | Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D |
| 2228 | Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S |
| 2229 | Rule Cuba 1972 1974 - Oct 8 0:00 0 S |
| 2230 | Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S |
| 2231 | Rule Cuba 1978 only - May 7 0:00 1:00 D |
| 2232 | Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S |
| 2233 | Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D |
| 2234 | Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D |
| 2235 | Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D |
| 2236 | Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D |
| 2237 | Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S |
| 2238 | Rule Cuba 1996 only - Oct 6 0:00s 0 S |
| 2239 | Rule Cuba 1997 only - Oct 12 0:00s 0 S |
| 2240 | Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D |
| 2241 | Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S |
| 2242 | Rule Cuba 2000 2006 - Apr Sun>=1 0:00s 1:00 D |
| 2243 | Rule Cuba 2006 only - Oct lastSun 0:00s 0 S |
| 2244 | Rule Cuba 2007 max - Mar Sun>=8 0:00s 1:00 D |
| 2245 | Rule Cuba 2007 max - Nov Sun>=1 0:00s 0 S |
| 2246 | |
| 2247 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2248 | Zone America/Havana -5:29:28 - LMT 1890 |
| 2249 | -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT |
| 2250 | -5:00 Cuba C%sT |
| 2251 | |
| 2252 | # Dominica |
| 2253 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2254 | Zone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau |
| 2255 | -4:00 - AST |
| 2256 | |
| 2257 | # Dominican Republic |
| 2258 | |
| 2259 | # From Steffen Thorsen (2000-10-30): |
| 2260 | # Enrique Morales reported to me that the Dominican Republic has changed the |
| 2261 | # time zone to Eastern Standard Time as of Sunday 29 at 2 am.... |
| 2262 | # http://www.listin.com.do/antes/261000/republica/princi.html |
| 2263 | |
| 2264 | # From Paul Eggert (2000-12-04): |
| 2265 | # That URL (2000-10-26, in Spanish) says they planned to use US-style DST. |
| 2266 | |
| 2267 | # From Rives McDow (2000-12-01): |
| 2268 | # Dominican Republic changed its mind and presidential decree on Tuesday, |
| 2269 | # November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the |
| 2270 | # Dominican Republic will be reverting to 8 hours from the International Date |
| 2271 | # Line, and will not be using DST in the foreseeable future. The reason they |
| 2272 | # decided to use DST was to be in synch with Puerto Rico, who was also going |
| 2273 | # to implement DST. When Puerto Rico didn't implement DST, the president |
| 2274 | # decided to revert. |
| 2275 | |
| 2276 | |
| 2277 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
| 2278 | Rule DR 1966 only - Oct 30 0:00 1:00 D |
| 2279 | Rule DR 1967 only - Feb 28 0:00 0 S |
| 2280 | Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD |
| 2281 | Rule DR 1970 only - Feb 21 0:00 0 S |
| 2282 | Rule DR 1971 only - Jan 20 0:00 0 S |
| 2283 | Rule DR 1972 1974 - Jan 21 0:00 0 S |
| 2284 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2285 | Zone America/Santo_Domingo -4:39:36 - LMT 1890 |
| 2286 | -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT |
| 2287 | -5:00 DR E%sT 1974 Oct 27 |
| 2288 | -4:00 - AST 2000 Oct 29 02:00 |
| 2289 | -5:00 US E%sT 2000 Dec 3 01:00 |
| 2290 | -4:00 - AST |
| 2291 | |
| 2292 | # El Salvador |
| 2293 | |
| 2294 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
| 2295 | Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D |
| 2296 | Rule Salv 1987 1988 - Sep lastSun 0:00 0 S |
| 2297 | # There are too many San Salvadors elsewhere, so use America/El_Salvador |
| 2298 | # instead of America/San_Salvador. |
| 2299 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2300 | Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador |
| 2301 | -6:00 Salv C%sT |
| 2302 | |
| 2303 | # Grenada |
| 2304 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2305 | Zone America/Grenada -4:07:00 - LMT 1911 Jul # St George's |
| 2306 | -4:00 - AST |
| 2307 | |
| 2308 | # Guadeloupe |
| 2309 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2310 | Zone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre |
| 2311 | -4:00 - AST |
| 2312 | |
| 2313 | # Guatemala |
| 2314 | # |
| 2315 | # From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: |
| 2316 | # Diario Co Latino, at |
| 2317 | # http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079, |
| 2318 | # says in an article dated 2006-04-19 that the Guatemalan government had |
| 2319 | # decided on that date to advance official time by 60 minutes, to lessen the |
| 2320 | # impact of the elevated cost of oil.... Daylight saving time will last from |
| 2321 | # 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). |
| 2322 | # From Paul Eggert (2006-06-22): |
| 2323 | # The Ministry of Energy and Mines, press release CP-15/2006 |
| 2324 | # (2006-04-19), says DST ends at 24:00. See |
| 2325 | # <http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf>. |
| 2326 | |
| 2327 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
| 2328 | Rule Guat 1973 only - Nov 25 0:00 1:00 D |
| 2329 | Rule Guat 1974 only - Feb 24 0:00 0 S |
| 2330 | Rule Guat 1983 only - May 21 0:00 1:00 D |
| 2331 | Rule Guat 1983 only - Sep 22 0:00 0 S |
| 2332 | Rule Guat 1991 only - Mar 23 0:00 1:00 D |
| 2333 | Rule Guat 1991 only - Sep 7 0:00 0 S |
| 2334 | Rule Guat 2006 only - Apr 30 0:00 1:00 D |
| 2335 | Rule Guat 2006 only - Oct 1 0:00 0 S |
| 2336 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2337 | Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5 |
| 2338 | -6:00 Guat C%sT |
| 2339 | |
| 2340 | # Haiti |
| 2341 | # From Gwillim Law (2005-04-15): |
| 2342 | # Risto O. Nykanen wrote me that Haiti is now on DST. |
| 2343 | # I searched for confirmation, and I found a |
| 2344 | # <a href="http://www.haitianconsulate.org/time.doc"> press release |
| 2345 | # on the Web page of the Haitian Consulate in Chicago (2005-03-31), |
| 2346 | # </a>. Translated from French, it says: |
| 2347 | # |
| 2348 | # "The Prime Minister's Communication Office notifies the public in general |
| 2349 | # and the press in particular that, following a decision of the Interior |
| 2350 | # Ministry and the Territorial Collectivities [I suppose that means the |
| 2351 | # provinces], Haiti will move to Eastern Daylight Time in the night from next |
| 2352 | # Saturday the 2nd to Sunday the 3rd. |
| 2353 | # |
| 2354 | # "Consequently, the Prime Minister's Communication Office wishes to inform |
| 2355 | # the population that the country's clocks will be set forward one hour |
| 2356 | # starting at midnight. This provision will hold until the last Saturday in |
| 2357 | # October 2005. |
| 2358 | # |
| 2359 | # "Port-au-Prince, March 31, 2005" |
| 2360 | # |
| 2361 | # From Steffen Thorsen (2006-04-04): |
| 2362 | # I have been informed by users that Haiti observes DST this year like |
| 2363 | # last year, so the current "only" rule for 2005 might be changed to a |
| 2364 | # "max" rule or to last until 2006. (Who knows if they will observe DST |
| 2365 | # next year or if they will extend their DST like US/Canada next year). |
| 2366 | # |
| 2367 | # I have found this article about it (in French): |
| 2368 | # http://www.haitipressnetwork.com/news.cfm?articleID=7612 |
| 2369 | # |
| 2370 | # The reason seems to be an energy crisis. |
| 2371 | |
| 2372 | # From Stephen Colebourne (2007-02-22): |
| 2373 | # Some IATA info: Haiti won't be having DST in 2007. |
| 2374 | |
| 2375 | |
| 2376 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
| 2377 | Rule Haiti 1983 only - May 8 0:00 1:00 D |
| 2378 | Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D |
| 2379 | Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S |
| 2380 | # Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. |
| 2381 | # Go with IATA. |
| 2382 | Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D |
| 2383 | Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S |
| 2384 | Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D |
| 2385 | Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S |
| 2386 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2387 | Zone America/Port-au-Prince -4:49:20 - LMT 1890 |
| 2388 | -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT |
| 2389 | -5:00 Haiti E%sT |
| 2390 | |
| 2391 | # Honduras |
| 2392 | # Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. |
| 2393 | |
| 2394 | # From Paul Eggert (2006-05-05): |
| 2395 | # worldtimezone.com reports a 2006-05-02 Spanish-language AP article |
| 2396 | # saying Honduras will start using DST midnight Saturday, effective 4 |
| 2397 | # months until September. La Tribuna reported today |
| 2398 | # <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president |
| 2399 | # of Honduras, refused to back down on this. |
| 2400 | |
| 2401 | # From Jesper Norgaard Welen (2006-08-08): |
| 2402 | # It seems that Honduras has returned from DST to standard time this Monday at |
| 2403 | # 00:00 hours (prolonging Sunday to 25 hours duration). |
| 2404 | # http://www.worldtimezone.com/dst_news/dst_news_honduras04.html |
| 2405 | |
| 2406 | # From Paul Eggert (2006-08-08): |
| 2407 | # Also see Diario El Heraldo, The country returns to standard time (2006-08-08) |
| 2408 | # <http://www.elheraldo.hn/nota.php?nid=54941&sec=12>. |
| 2409 | # It mentions executive decree 18-2006. |
| 2410 | |
| 2411 | # From Steffen Thorsen (2006-08-17): |
| 2412 | # Honduras will observe DST from 2007 to 2009, exact dates are not |
| 2413 | # published, I have located this authoritative source: |
| 2414 | # http://www.presidencia.gob.hn/noticia.aspx?nId=47 |
| 2415 | |
| 2416 | # From Steffen Thorsen (2007-03-30): |
| 2417 | # http://www.laprensahn.com/pais_nota.php?id04962=7386 |
| 2418 | # So it seems that Honduras will not enter DST this year.... |
| 2419 | |
| 2420 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
| 2421 | Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D |
| 2422 | Rule Hond 1987 1988 - Sep lastSun 0:00 0 S |
| 2423 | Rule Hond 2006 only - May Sun>=1 0:00 1:00 D |
| 2424 | Rule Hond 2006 only - Aug Mon>=1 0:00 0 S |
| 2425 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2426 | Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr |
| 2427 | -6:00 Hond C%sT |
| 2428 | # |
| 2429 | # Great Swan I ceded by US to Honduras in 1972 |
| 2430 | |
| 2431 | # Jamaica |
| 2432 | |
| 2433 | # From Bob Devine (1988-01-28): |
| 2434 | # Follows US rules. |
| 2435 | |
| 2436 | # From U. S. Naval Observatory (1989-01-19): |
| 2437 | # JAMAICA 5 H BEHIND UTC |
| 2438 | |
| 2439 | # From Shanks & Pottenger: |
| 2440 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2441 | Zone America/Jamaica -5:07:12 - LMT 1890 # Kingston |
| 2442 | -5:07:12 - KMT 1912 Feb # Kingston Mean Time |
| 2443 | -5:00 - EST 1974 Apr 28 2:00 |
| 2444 | -5:00 US E%sT 1984 |
| 2445 | -5:00 - EST |
| 2446 | |
| 2447 | # Martinique |
| 2448 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2449 | Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France |
| 2450 | -4:04:20 - FFMT 1911 May # Fort-de-France MT |
| 2451 | -4:00 - AST 1980 Apr 6 |
| 2452 | -4:00 1:00 ADT 1980 Sep 28 |
| 2453 | -4:00 - AST |
| 2454 | |
| 2455 | # Montserrat |
| 2456 | # From Paul Eggert (2006-03-22): |
| 2457 | # In 1995 volcanic eruptions forced evacuation of Plymouth, the capital. |
| 2458 | # world.gazetteer.com says Cork Hill is the most populous location now. |
| 2459 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2460 | Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Cork Hill |
| 2461 | -4:00 - AST |
| 2462 | |
| 2463 | # Nicaragua |
| 2464 | # |
| 2465 | # This uses Shanks & Pottenger for times before 2005. |
| 2466 | # |
| 2467 | # From Steffen Thorsen (2005-04-12): |
| 2468 | # I've got reports from 8 different people that Nicaragua just started |
| 2469 | # DST on Sunday 2005-04-10, in order to save energy because of |
| 2470 | # expensive petroleum. The exact end date for DST is not yet |
| 2471 | # announced, only "September" but some sites also say "mid-September". |
| 2472 | # Some background information is available on the President's official site: |
| 2473 | # http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm |
| 2474 | # The Decree, no 23-2005 is available here: |
| 2475 | # 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 |
| 2476 | # |
| 2477 | # From Paul Eggert (2005-05-01): |
| 2478 | # The decree doesn't say anything about daylight saving, but for now let's |
| 2479 | # assume that it is daylight saving.... |
| 2480 | # |
| 2481 | # From Gwillim Law (2005-04-21): |
| 2482 | # The Associated Press story on the time change, which can be found at |
| 2483 | # http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html |
| 2484 | # and elsewhere, says (fifth paragraph, translated from Spanish): "The last |
| 2485 | # time that a change of clocks was applied to save energy was in the year 2000 |
| 2486 | # during the Arnoldo Aleman administration."... |
| 2487 | # The northamerica file says that Nicaragua has been on UTC-6 continuously |
| 2488 | # since December 1998. I wasn't able to find any details of Nicaraguan time |
| 2489 | # changes in 2000. Perhaps a note could be added to the northamerica file, to |
| 2490 | # the effect that we have indirect evidence that DST was observed in 2000. |
| 2491 | # |
| 2492 | # From Jesper Norgaard Welen (2005-11-02): |
| 2493 | # Nicaragua left DST the 2005-10-02 at 00:00 (local time). |
| 2494 | # http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm |
| 2495 | # (2005-09-26) |
| 2496 | # |
| 2497 | # From Jesper Norgaard Welen (2006-05-05): |
| 2498 | # http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 |
| 2499 | # (my informal translation) |
| 2500 | # By order of the president of the republic, Enrique Bolanos, Nicaragua |
| 2501 | # advanced by sixty minutes their official time, yesterday at 2 in the |
| 2502 | # morning, and will stay that way until 30.th. of september. |
| 2503 | # |
| 2504 | # From Jesper Norgaard Welen (2006-09-30): |
| 2505 | # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf |
| 2506 | # My informal translation runs: |
| 2507 | # The natural sun time is restored in all the national territory, in that the |
| 2508 | # time is returned one hour at 01:00 am of October 1 of 2006. |
| 2509 | # |
| 2510 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
| 2511 | Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D |
| 2512 | Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S |
| 2513 | Rule Nic 2005 only - Apr 10 0:00 1:00 D |
| 2514 | Rule Nic 2005 only - Oct Sun>=1 0:00 0 S |
| 2515 | Rule Nic 2006 only - Apr 30 2:00 1:00 D |
| 2516 | Rule Nic 2006 only - Oct Sun>=1 1:00 0 S |
| 2517 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2518 | Zone America/Managua -5:45:08 - LMT 1890 |
| 2519 | -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? |
| 2520 | -6:00 - CST 1973 May |
| 2521 | -5:00 - EST 1975 Feb 16 |
| 2522 | -6:00 Nic C%sT 1992 Jan 1 4:00 |
| 2523 | -5:00 - EST 1992 Sep 24 |
| 2524 | -6:00 - CST 1993 |
| 2525 | -5:00 - EST 1997 |
| 2526 | -6:00 Nic C%sT |
| 2527 | |
| 2528 | # Panama |
| 2529 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2530 | Zone America/Panama -5:18:08 - LMT 1890 |
| 2531 | -5:19:36 - CMT 1908 Apr 22 # Colon Mean Time |
| 2532 | -5:00 - EST |
| 2533 | |
| 2534 | # Puerto Rico |
| 2535 | # There are too many San Juans elsewhere, so we'll use `Puerto_Rico'. |
| 2536 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2537 | Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan |
| 2538 | -4:00 - AST 1942 May 3 |
| 2539 | -4:00 US A%sT 1946 |
| 2540 | -4:00 - AST |
| 2541 | |
| 2542 | # St Kitts-Nevis |
| 2543 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2544 | Zone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre |
| 2545 | -4:00 - AST |
| 2546 | |
| 2547 | # St Lucia |
| 2548 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2549 | Zone America/St_Lucia -4:04:00 - LMT 1890 # Castries |
| 2550 | -4:04:00 - CMT 1912 # Castries Mean Time |
| 2551 | -4:00 - AST |
| 2552 | |
| 2553 | # St Pierre and Miquelon |
| 2554 | # There are too many St Pierres elsewhere, so we'll use `Miquelon'. |
| 2555 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2556 | Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre |
| 2557 | -4:00 - AST 1980 May |
| 2558 | -3:00 - PMST 1987 # Pierre & Miquelon Time |
| 2559 | -3:00 Canada PM%sT |
| 2560 | |
| 2561 | # St Vincent and the Grenadines |
| 2562 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2563 | Zone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown |
| 2564 | -4:04:56 - KMT 1912 # Kingstown Mean Time |
| 2565 | -4:00 - AST |
| 2566 | |
| 2567 | # Turks and Caicos |
| 2568 | # |
| 2569 | # From Chris Dunn in |
| 2570 | # <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007> |
| 2571 | # (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the |
| 2572 | # daylight saving dates for time changes have been adjusted to match |
| 2573 | # the recent U.S. change of dates. |
| 2574 | # |
| 2575 | # From Brian Inglis (2007-04-28): |
| 2576 | # http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] |
| 2577 | # there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three |
| 2578 | # rows before that there is an out of date entry for Oct: |
| 2579 | # "Eastern Standard Times Begins 2007 |
| 2580 | # Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" |
| 2581 | # indicating that the normal ET rules are followed. |
| 2582 | # |
| 2583 | # From Paul Eggert (2006-05-01): |
| 2584 | # Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998) |
| 2585 | # says they switch at midnight. Go with Shanks & Pottenger. |
| 2586 | # |
| 2587 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
| 2588 | Rule TC 1979 1986 - Apr lastSun 2:00 1:00 D |
| 2589 | Rule TC 1979 2006 - Oct lastSun 2:00 0 S |
| 2590 | Rule TC 1987 2006 - Apr Sun>=1 2:00 1:00 D |
| 2591 | Rule TC 2007 max - Mar Sun>=8 2:00 1:00 D |
| 2592 | Rule TC 2007 max - Nov Sun>=1 2:00 0 S |
| 2593 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2594 | Zone America/Grand_Turk -4:44:32 - LMT 1890 |
| 2595 | -5:07:12 - KMT 1912 Feb # Kingston Mean Time |
| 2596 | -5:00 TC E%sT |
| 2597 | |
| 2598 | # British Virgin Is |
| 2599 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2600 | Zone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town |
| 2601 | -4:00 - AST |
| 2602 | |
| 2603 | # Virgin Is |
| 2604 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
| 2605 | Zone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie |
| 2606 | -4:00 - AST |