4 # This file also includes Pacific islands.
6 # Notes are at the end of this file
8 ###############################################################################
12 # Please see the notes below for the controversy about "EST" versus "AEST" etc.
14 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
15 Rule Aus 1917 only - Jan 1 0:01 1:00 -
16 Rule Aus 1917 only - Mar 25 2:00 0 -
17 Rule Aus 1942 only - Jan 1 2:00 1:00 -
18 Rule Aus 1942 only - Mar 29 2:00 0 -
19 Rule Aus 1942 only - Sep 27 2:00 1:00 -
20 Rule Aus 1943 1944 - Mar lastSun 2:00 0 -
21 Rule Aus 1943 only - Oct 3 2:00 1:00 -
22 # Go with Whitman and the Australian National Standards Commission, which
23 # says W Australia didn't use DST in 1943/1944. Ignore Whitman's claim that
24 # 1944/1945 was just like 1943/1944.
26 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
28 Zone Australia/Darwin 8:43:20 - LMT 1895 Feb
33 # From Christopher Hunt (2006-11-21), after an advance warning
34 # from Jesper Norgaard Welen (2006-11-01):
35 # WA are trialing DST for three years.
36 # <http://www.parliament.wa.gov.au/parliament/bills.nsf/62D4F7C55EA88993482572110007316A/$File/Bill174-1.pdf>
38 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
39 Rule AW 1974 only - Oct lastSun 2:00s 1:00 -
40 Rule AW 1975 only - Mar Sun>=1 2:00s 0 -
41 Rule AW 1983 only - Oct lastSun 2:00s 1:00 -
42 Rule AW 1984 only - Mar Sun>=1 2:00s 0 -
43 Rule AW 1991 only - Nov 17 2:00s 1:00 -
44 Rule AW 1992 only - Mar Sun>=1 2:00s 0 -
45 Rule AW 2006 only - Dec 3 2:00s 1:00 -
46 Rule AW 2007 2009 - Mar lastSun 2:00s 0 -
47 Rule AW 2007 2008 - Oct lastSun 2:00s 1:00 -
48 Zone Australia/Perth 7:43:24 - LMT 1895 Dec
53 # From Alex Livingston (1996-11-01):
54 # I have heard or read more than once that some resort islands off the coast
55 # of Queensland chose to keep observing daylight-saving time even after
56 # Queensland ceased to.
58 # From Paul Eggert (1996-11-22):
59 # IATA SSIM (1993-02/1994-09) say that the Holiday Islands (Hayman, Lindeman,
60 # Hamilton) observed DST for two years after the rest of Queensland stopped.
61 # Hamilton is the largest, but there is also a Hamilton in Victoria,
64 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
65 Rule AQ 1971 only - Oct lastSun 2:00s 1:00 -
66 Rule AQ 1972 only - Feb lastSun 2:00s 0 -
67 Rule AQ 1989 1991 - Oct lastSun 2:00s 1:00 -
68 Rule AQ 1990 1992 - Mar Sun>=1 2:00s 0 -
69 Rule Holiday 1992 1993 - Oct lastSun 2:00s 1:00 -
70 Rule Holiday 1993 1994 - Mar Sun>=1 2:00s 0 -
71 Zone Australia/Brisbane 10:12:08 - LMT 1895
74 Zone Australia/Lindeman 9:55:56 - LMT 1895
80 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
81 Rule AS 1971 1985 - Oct lastSun 2:00s 1:00 -
82 Rule AS 1986 only - Oct 19 2:00s 1:00 -
83 Rule AS 1987 max - Oct lastSun 2:00s 1:00 -
84 Rule AS 1972 only - Feb 27 2:00s 0 -
85 Rule AS 1973 1985 - Mar Sun>=1 2:00s 0 -
86 Rule AS 1986 1989 - Mar Sun>=15 2:00s 0 -
87 Rule AS 1990 only - Mar Sun>=18 2:00s 0 -
88 Rule AS 1991 only - Mar Sun>=1 2:00s 0 -
89 Rule AS 1992 only - Mar Sun>=18 2:00s 0 -
90 Rule AS 1993 only - Mar Sun>=1 2:00s 0 -
91 Rule AS 1994 only - Mar Sun>=18 2:00s 0 -
92 Rule AS 1995 2005 - Mar lastSun 2:00s 0 -
93 Rule AS 2006 only - Apr Sun>=1 2:00s 0 -
94 Rule AS 2007 max - Mar lastSun 2:00s 0 -
95 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
96 Zone Australia/Adelaide 9:14:20 - LMT 1895 Feb
103 # From Paul Eggert (2005-08-16):
104 # <http://www.bom.gov.au/climate/averages/tables/dst_times.shtml>
105 # says King Island didn't observe DST from WWII until late 1971.
107 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
108 Rule AT 1967 only - Oct Sun>=1 2:00s 1:00 -
109 Rule AT 1968 only - Mar lastSun 2:00s 0 -
110 Rule AT 1968 1985 - Oct lastSun 2:00s 1:00 -
111 Rule AT 1969 1971 - Mar Sun>=8 2:00s 0 -
112 Rule AT 1972 only - Feb lastSun 2:00s 0 -
113 Rule AT 1973 1981 - Mar Sun>=1 2:00s 0 -
114 Rule AT 1982 1983 - Mar lastSun 2:00s 0 -
115 Rule AT 1984 1986 - Mar Sun>=1 2:00s 0 -
116 Rule AT 1986 only - Oct Sun>=15 2:00s 1:00 -
117 Rule AT 1987 1990 - Mar Sun>=15 2:00s 0 -
118 Rule AT 1987 only - Oct Sun>=22 2:00s 1:00 -
119 Rule AT 1988 1990 - Oct lastSun 2:00s 1:00 -
120 Rule AT 1991 1999 - Oct Sun>=1 2:00s 1:00 -
121 Rule AT 1991 2005 - Mar lastSun 2:00s 0 -
122 Rule AT 2000 only - Aug lastSun 2:00s 1:00 -
123 Rule AT 2001 max - Oct Sun>=1 2:00s 1:00 -
124 Rule AT 2006 only - Apr Sun>=1 2:00s 0 -
125 Rule AT 2007 max - Mar lastSun 2:00s 0 -
126 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
127 Zone Australia/Hobart 9:49:16 - LMT 1895 Sep
128 10:00 - EST 1916 Oct 1 2:00
129 10:00 1:00 EST 1917 Feb
132 Zone Australia/Currie 9:35:28 - LMT 1895 Sep
133 10:00 - EST 1916 Oct 1 2:00
134 10:00 1:00 EST 1917 Feb
135 10:00 Aus EST 1971 Jul
139 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
140 Rule AV 1971 1985 - Oct lastSun 2:00s 1:00 -
141 Rule AV 1972 only - Feb lastSun 2:00s 0 -
142 Rule AV 1973 1985 - Mar Sun>=1 2:00s 0 -
143 Rule AV 1986 1990 - Mar Sun>=15 2:00s 0 -
144 Rule AV 1986 1987 - Oct Sun>=15 2:00s 1:00 -
145 Rule AV 1988 1999 - Oct lastSun 2:00s 1:00 -
146 Rule AV 1991 1994 - Mar Sun>=1 2:00s 0 -
147 Rule AV 1995 2005 - Mar lastSun 2:00s 0 -
148 Rule AV 2000 only - Aug lastSun 2:00s 1:00 -
149 Rule AV 2001 max - Oct lastSun 2:00s 1:00 -
150 Rule AV 2006 only - Apr Sun>=1 2:00s 0 -
151 Rule AV 2007 max - Mar lastSun 2:00s 0 -
152 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
153 Zone Australia/Melbourne 9:39:52 - LMT 1895 Feb
158 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
159 Rule AN 1971 1985 - Oct lastSun 2:00s 1:00 -
160 Rule AN 1972 only - Feb 27 2:00s 0 -
161 Rule AN 1973 1981 - Mar Sun>=1 2:00s 0 -
162 Rule AN 1982 only - Apr Sun>=1 2:00s 0 -
163 Rule AN 1983 1985 - Mar Sun>=1 2:00s 0 -
164 Rule AN 1986 1989 - Mar Sun>=15 2:00s 0 -
165 Rule AN 1986 only - Oct 19 2:00s 1:00 -
166 Rule AN 1987 1999 - Oct lastSun 2:00s 1:00 -
167 Rule AN 1990 1995 - Mar Sun>=1 2:00s 0 -
168 Rule AN 1996 2005 - Mar lastSun 2:00s 0 -
169 Rule AN 2000 only - Aug lastSun 2:00s 1:00 -
170 Rule AN 2001 max - Oct lastSun 2:00s 1:00 -
171 Rule AN 2006 only - Apr Sun>=1 2:00s 0 -
172 Rule AN 2007 max - Mar lastSun 2:00s 0 -
173 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
174 Zone Australia/Sydney 10:04:52 - LMT 1895 Feb
177 Zone Australia/Broken_Hill 9:25:48 - LMT 1895 Feb
178 10:00 - EST 1896 Aug 23
185 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
186 Rule LH 1981 1984 - Oct lastSun 2:00 1:00 -
187 Rule LH 1982 1985 - Mar Sun>=1 2:00 0 -
188 Rule LH 1985 only - Oct lastSun 2:00 0:30 -
189 Rule LH 1986 1989 - Mar Sun>=15 2:00 0 -
190 Rule LH 1986 only - Oct 19 2:00 0:30 -
191 Rule LH 1987 1999 - Oct lastSun 2:00 0:30 -
192 Rule LH 1990 1995 - Mar Sun>=1 2:00 0 -
193 Rule LH 1996 2005 - Mar lastSun 2:00 0 -
194 Rule LH 2000 only - Aug lastSun 2:00 0:30 -
195 Rule LH 2001 max - Oct lastSun 2:00 0:30 -
196 Rule LH 2006 only - Apr Sun>=1 2:00 0 -
197 Rule LH 2007 max - Mar lastSun 2:00 0 -
198 Zone Australia/Lord_Howe 10:36:20 - LMT 1895 Feb
202 # Australian miscellany
204 # Ashmore Is, Cartier
205 # no indigenous inhabitants; only seasonal caretakers
206 # like Australia/Perth, says Turner
209 # no indigenous inhabitants; only meteorologists
213 # permanent occupation (scientific station) since 1948;
214 # sealing and penguin oil station operated 1888/1917
215 # like Australia/Hobart, says Turner
218 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
219 Zone Indian/Christmas 7:02:52 - LMT 1895 Feb
220 7:00 - CXT # Christmas Island Time
223 # From Shanks & Pottenger:
224 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
225 Rule Cook 1978 only - Nov 12 0:00 0:30 HS
226 Rule Cook 1979 1991 - Mar Sun>=1 0:00 0 -
227 Rule Cook 1979 1990 - Oct lastSun 0:00 0:30 HS
228 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
229 Zone Pacific/Rarotonga -10:39:04 - LMT 1901 # Avarua
230 -10:30 - CKT 1978 Nov 12 # Cook Is Time
234 # These islands were ruled by the Ross family from about 1830 to 1978.
235 # We don't know when standard time was introduced; for now, we guess 1900.
236 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
237 Zone Indian/Cocos 6:27:40 - LMT 1900
238 6:30 - CCT # Cocos Islands Time
241 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
242 Rule Fiji 1998 1999 - Nov Sun>=1 2:00 1:00 S
243 Rule Fiji 1999 2000 - Feb lastSun 3:00 0 -
244 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
245 Zone Pacific/Fiji 11:53:40 - LMT 1915 Oct 26 # Suva
246 12:00 Fiji FJ%sT # Fiji Time
249 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
250 Zone Pacific/Gambier -8:59:48 - LMT 1912 Oct # Rikitea
251 -9:00 - GAMT # Gambier Time
252 Zone Pacific/Marquesas -9:18:00 - LMT 1912 Oct
253 -9:30 - MART # Marquesas Time
254 Zone Pacific/Tahiti -9:58:16 - LMT 1912 Oct # Papeete
255 -10:00 - TAHT # Tahiti Time
256 # Clipperton (near North America) is administered from French Polynesia;
260 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
261 Zone Pacific/Guam -14:21:00 - LMT 1844 Dec 31
262 9:39:00 - LMT 1901 # Agana
263 10:00 - GST 2000 Dec 23 # Guam
264 10:00 - ChST # Chamorro Standard Time
267 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
268 Zone Pacific/Tarawa 11:32:04 - LMT 1901 # Bairiki
269 12:00 - GILT # Gilbert Is Time
270 Zone Pacific/Enderbury -11:24:20 - LMT 1901
271 -12:00 - PHOT 1979 Oct # Phoenix Is Time
274 Zone Pacific/Kiritimati -10:29:20 - LMT 1901
275 -10:40 - LINT 1979 Oct # Line Is Time
280 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
281 Zone Pacific/Saipan -14:17:00 - LMT 1844 Dec 31
283 9:00 - MPT 1969 Oct # N Mariana Is Time
284 10:00 - MPT 2000 Dec 23
285 10:00 - ChST # Chamorro Standard Time
288 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
289 Zone Pacific/Majuro 11:24:48 - LMT 1901
290 11:00 - MHT 1969 Oct # Marshall Islands Time
292 Zone Pacific/Kwajalein 11:09:20 - LMT 1901
294 -12:00 - KWAT 1993 Aug 20 # Kwajalein Time
298 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
299 Zone Pacific/Truk 10:07:08 - LMT 1901
300 10:00 - TRUT # Truk Time
301 Zone Pacific/Ponape 10:32:52 - LMT 1901 # Kolonia
302 11:00 - PONT # Ponape Time
303 Zone Pacific/Kosrae 10:51:56 - LMT 1901
304 11:00 - KOST 1969 Oct # Kosrae Time
309 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
310 Zone Pacific/Nauru 11:07:40 - LMT 1921 Jan 15 # Uaobe
311 11:30 - NRT 1942 Mar 15 # Nauru Time
312 9:00 - JST 1944 Aug 15
317 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
318 Rule NC 1977 1978 - Dec Sun>=1 0:00 1:00 S
319 Rule NC 1978 1979 - Feb 27 0:00 0 -
320 Rule NC 1996 only - Dec 1 2:00s 1:00 S
321 # Shanks & Pottenger say the following was at 2:00; go with IATA.
322 Rule NC 1997 only - Mar 2 2:00s 0 -
323 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
324 Zone Pacific/Noumea 11:05:48 - LMT 1912 Jan 13
328 ###############################################################################
332 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
333 Rule NZ 1927 only - Nov 6 2:00 1:00 S
334 Rule NZ 1928 only - Mar 4 2:00 0 M
335 Rule NZ 1928 1933 - Oct Sun>=8 2:00 0:30 S
336 Rule NZ 1929 1933 - Mar Sun>=15 2:00 0 M
337 Rule NZ 1934 1940 - Apr lastSun 2:00 0 M
338 Rule NZ 1934 1940 - Sep lastSun 2:00 0:30 S
339 Rule NZ 1946 only - Jan 1 0:00 0 S
340 # Since 1957 Chatham has been 45 minutes ahead of NZ, but there's no
341 # convenient notation for this so we must duplicate the Rule lines.
342 Rule NZ 1974 only - Nov Sun>=1 2:00s 1:00 D
343 Rule Chatham 1974 only - Nov Sun>=1 2:45s 1:00 D
344 Rule NZ 1975 only - Feb lastSun 2:00s 0 S
345 Rule Chatham 1975 only - Feb lastSun 2:45s 0 S
346 Rule NZ 1975 1988 - Oct lastSun 2:00s 1:00 D
347 Rule Chatham 1975 1988 - Oct lastSun 2:45s 1:00 D
348 Rule NZ 1976 1989 - Mar Sun>=1 2:00s 0 S
349 Rule Chatham 1976 1989 - Mar Sun>=1 2:45s 0 S
350 Rule NZ 1989 only - Oct Sun>=8 2:00s 1:00 D
351 Rule Chatham 1989 only - Oct Sun>=8 2:45s 1:00 D
352 Rule NZ 1990 max - Oct Sun>=1 2:00s 1:00 D
353 Rule Chatham 1990 max - Oct Sun>=1 2:45s 1:00 D
354 Rule NZ 1990 max - Mar Sun>=15 2:00s 0 S
355 Rule Chatham 1990 max - Mar Sun>=15 2:45s 0 S
356 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
357 Zone Pacific/Auckland 11:39:04 - LMT 1868 Nov 2
358 11:30 NZ NZ%sT 1946 Jan 1
360 Zone Pacific/Chatham 12:13:48 - LMT 1957 Jan 1
365 # uninhabited; Maori and Moriori, colonial settlers, pastoralists, sealers,
366 # and scientific personnel have wintered
369 # minor whaling stations operated 1909/1914
370 # scientific station operated 1941/1995;
371 # previously whalers, sealers, pastoralists, and scientific personnel wintered
372 # was probably like Pacific/Auckland
374 ###############################################################################
378 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
379 Zone Pacific/Niue -11:19:40 - LMT 1901 # Alofi
380 -11:20 - NUT 1951 # Niue Time
381 -11:30 - NUT 1978 Oct 1
385 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
386 Zone Pacific/Norfolk 11:11:52 - LMT 1901 # Kingston
387 11:12 - NMT 1951 # Norfolk Mean Time
388 11:30 - NFT # Norfolk Time
391 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
392 Zone Pacific/Palau 8:57:56 - LMT 1901 # Koror
393 9:00 - PWT # Palau Time
396 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
397 Zone Pacific/Port_Moresby 9:48:40 - LMT 1880
398 9:48:32 - PMMT 1895 # Port Moresby Mean Time
399 10:00 - PGT # Papua New Guinea Time
402 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
403 Zone Pacific/Pitcairn -8:40:20 - LMT 1901 # Adamstown
404 -8:30 - PNT 1998 Apr 27 00:00
405 -8:00 - PST # Pitcairn Standard Time
408 Zone Pacific/Pago_Pago 12:37:12 - LMT 1879 Jul 5
410 -11:30 - SAMT 1950 # Samoa Time
411 -11:00 - NST 1967 Apr # N=Nome
412 -11:00 - BST 1983 Nov 30 # B=Bering
413 -11:00 - SST # S=Samoa
416 Zone Pacific/Apia 12:33:04 - LMT 1879 Jul 5
418 -11:30 - SAMT 1950 # Samoa Time
419 -11:00 - WST # Samoa Time
422 # excludes Bougainville, for which see Papua New Guinea
423 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
424 Zone Pacific/Guadalcanal 10:39:48 - LMT 1912 Oct # Honiara
425 11:00 - SBT # Solomon Is Time
428 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
429 Zone Pacific/Fakaofo -11:24:56 - LMT 1901
430 -10:00 - TKT # Tokelau Time
433 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
434 Rule Tonga 1999 only - Oct 7 2:00s 1:00 S
435 Rule Tonga 2000 only - Mar 19 2:00s 0 -
436 Rule Tonga 2000 2001 - Nov Sun>=1 2:00 1:00 S
437 Rule Tonga 2001 2002 - Jan lastSun 2:00 0 -
438 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
439 Zone Pacific/Tongatapu 12:19:20 - LMT 1901
440 12:20 - TOT 1941 # Tonga Time
445 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
446 Zone Pacific/Funafuti 11:56:52 - LMT 1901
447 12:00 - TVT # Tuvalu Time
450 # US minor outlying islands
453 # uninhabited since World War II
454 # no information; was probably like Pacific/Pago_Pago
457 # uninhabited since 1958
458 # no information; was probably like Pacific/Kiritimati
461 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
462 Zone Pacific/Johnston -10:00 - HST
469 # From Mark Brader (2005-01-23):
470 # [Fallacies and Fantasies of Air Transport History, by R.E.G. Davies,
471 # published 1994 by Paladwr Press, McLean, VA, USA; ISBN 0-9626483-5-3]
472 # reproduced a Pan American Airways timeables from 1936, for their weekly
473 # "Orient Express" flights between San Francisco and Manila, and connecting
474 # flights to Chicago and the US East Coast. As it uses some time zone
475 # designations that I've never seen before:....
476 # Fri. 6:30A Lv. HONOLOLU (Pearl Harbor), H.I. H.L.T. Ar. 5:30P Sun.
477 # " 3:00P Ar. MIDWAY ISLAND . . . . . . . . . M.L.T. Lv. 6:00A "
479 Zone Pacific/Midway -11:49:28 - LMT 1901
480 -11:00 - NST 1956 Jun 3
481 -11:00 1:00 NDT 1956 Sep 2
482 -11:00 - NST 1967 Apr # N=Nome
483 -11:00 - BST 1983 Nov 30 # B=Bering
484 -11:00 - SST # S=Samoa
487 # uninhabited since World War II; was probably like Pacific/Kiritimati
490 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
491 Zone Pacific/Wake 11:06:28 - LMT 1901
492 12:00 - WAKT # Wake Time
496 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
497 Rule Vanuatu 1983 only - Sep 25 0:00 1:00 S
498 Rule Vanuatu 1984 1991 - Mar Sun>=23 0:00 0 -
499 Rule Vanuatu 1984 only - Oct 23 0:00 1:00 S
500 Rule Vanuatu 1985 1991 - Sep Sun>=23 0:00 1:00 S
501 Rule Vanuatu 1992 1993 - Jan Sun>=23 0:00 0 -
502 Rule Vanuatu 1992 only - Oct Sun>=23 0:00 1:00 S
503 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
504 Zone Pacific/Efate 11:13:16 - LMT 1912 Jan 13 # Vila
505 11:00 Vanuatu VU%sT # Vanuatu Time
508 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
509 Zone Pacific/Wallis 12:15:20 - LMT 1901
510 12:00 - WFT # Wallis & Futuna Time
512 ###############################################################################
516 # This data is by no means authoritative; if you think you know better,
517 # go ahead and edit the file (and please send any changes to
518 # tz@elsie.nci.nih.gov for general use in the future).
520 # From Paul Eggert (2006-03-22):
521 # A good source for time zone historical data outside the U.S. is
522 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
523 # San Diego: ACS Publications, Inc. (2003).
525 # Gwillim Law writes that a good source
526 # for recent time zone data is the International Air Transport
527 # Association's Standard Schedules Information Manual (IATA SSIM),
528 # published semiannually. Law sent in several helpful summaries
529 # of the IATA's data after 1990.
531 # Except where otherwise noted, Shanks & Pottenger is the source for
532 # entries through 1990, and IATA SSIM is the source for entries afterwards.
534 # Another source occasionally used is Edward W. Whitman, World Time Differences,
535 # Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), which
536 # I found in the UCLA library.
538 # A reliable and entertaining source about time zones is
539 # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
541 # I invented the abbreviations marked `*' in the following table;
542 # the rest are from earlier versions of this file, or from other sources.
543 # Corrections are welcome!
545 # LMT Local Mean Time
546 # 8:00 WST WST Western Australia
548 # 9:30 CST CST Central Australia
549 # 10:00 EST EST Eastern Australia
550 # 10:00 ChST Chamorro
551 # 10:30 LHST LHST Lord Howe*
552 # 11:30 NZMT NZST New Zealand through 1945
553 # 12:00 NZST NZDT New Zealand 1946-present
554 # 12:45 CHAST CHADT Chatham*
557 # - 8:00 PST Pitcairn*
559 # See the `northamerica' file for Hawaii.
560 # See the `southamerica' file for Easter I and the Galapagos Is.
562 ###############################################################################
566 # From Paul Eggert (2005-12-08):
567 # <a href="http://www.bom.gov.au/climate/averages/tables/dst_times.shtml">
568 # Implementation Dates of Daylight Saving Time within Australia
569 # </a> summarizes daylight saving issues in Australia.
571 # From Arthur David Olson (2005-12-12):
572 # <a href="http://www.lawlink.nsw.gov.au/lawlink/Corporate/ll_agdinfo.nsf/pages/community_relations_daylight_saving">
573 # Lawlink NSW:Daylight Saving in New South Wales
574 # </a> covers New South Wales in particular.
576 # From John Mackin (1991-03-06):
577 # We in Australia have _never_ referred to DST as `daylight' time.
578 # It is called `summer' time. Now by a happy coincidence, `summer'
579 # and `standard' happen to start with the same letter; hence, the
580 # abbreviation does _not_ change...
581 # The legislation does not actually define abbreviations, at least
582 # in this State, but the abbreviation is just commonly taken to be the
583 # initials of the phrase, and the legislation here uniformly uses
584 # the phrase `summer time' and does not use the phrase `daylight
586 # Announcers on the Commonwealth radio network, the ABC (for Australian
587 # Broadcasting Commission), use the phrases `Eastern Standard Time'
588 # or `Eastern Summer Time'. (Note, though, that as I say in the
589 # current australasia file, there is really no such thing.) Announcers
590 # on its overseas service, Radio Australia, use the same phrases
591 # prefixed by the word `Australian' when referring to local times;
592 # time announcements on that service, naturally enough, are made in UTC.
594 # From Arthur David Olson (1992-03-08):
595 # Given the above, what's chosen for year-round use is:
596 # CST for any place operating at a GMTOFF of 9:30
597 # WST for any place operating at a GMTOFF of 8:00
598 # EST for any place operating at a GMTOFF of 10:00
600 # From Chuck Soper (2006-06-01):
601 # I recently found this Australian government web page on time zones:
602 # <http://www.australia.gov.au/about-australia-13time>
603 # And this government web page lists time zone names and abbreviations:
604 # <http://www.bom.gov.au/climate/averages/tables/daysavtm.shtml>
606 # From Paul Eggert (2001-04-05), summarizing a long discussion about "EST"
607 # versus "AEST" etc.:
609 # I see the following points of dispute:
611 # * How important are unique time zone abbreviations?
613 # Here I tend to agree with the point (most recently made by Chris
614 # Newman) that unique abbreviations should not be essential for proper
615 # operation of software. We have other instances of ambiguity
616 # (e.g. "IST" denoting both "Israel Standard Time" and "Indian
617 # Standard Time"), and they are not likely to go away any time soon.
618 # In the old days, some software mistakenly relied on unique
619 # abbreviations, but this is becoming less true with time, and I don't
620 # think it's that important to cater to such software these days.
622 # On the other hand, there is another motivation for unambiguous
623 # abbreviations: it cuts down on human confusion. This is
624 # particularly true for Australia, where "EST" can mean one thing for
625 # time T and a different thing for time T plus 1 second.
627 # * Does the relevant legislation indicate which abbreviations should be used?
629 # Here I tend to think that things are a mess, just as they are in
630 # many other countries. We Americans are currently disagreeing about
631 # which abbreviation to use for the newly legislated Chamorro Standard
634 # Personally, I would prefer to use common practice; I would like to
635 # refer to legislation only for examples of common practice, or as a
638 # * Do Australians more often use "Eastern Daylight Time" or "Eastern
639 # Summer Time"? Do they typically prefix the time zone names with
640 # the word "Australian"?
642 # My own impression is that both "Daylight Time" and "Summer Time" are
643 # common and are widely understood, but that "Summer Time" is more
644 # popular; and that the leading "A" is also common but is omitted more
645 # often than not. I just used AltaVista advanced search and got the
646 # following count of page hits:
648 # 1,103 "Eastern Summer Time" AND domain:au
649 # 971 "Australian Eastern Summer Time" AND domain:au
650 # 613 "Eastern Daylight Time" AND domain:au
651 # 127 "Australian Eastern Daylight Time" AND domain:au
653 # Here "Summer" seems quite a bit more popular than "Daylight",
654 # particularly when we know the time zone is Australian and not US,
655 # say. The "Australian" prefix seems to be popular for Eastern Summer
656 # Time, but unpopular for Eastern Daylight Time.
658 # For abbreviations, tools like AltaVista are less useful because of
659 # ambiguity. Many hits are not really time zones, unfortunately, and
660 # many hits denote US time zones and not Australian ones. But here
661 # are the hit counts anyway:
663 # 161,304 "EST" and domain:au
664 # 25,156 "EDT" and domain:au
665 # 18,263 "AEST" and domain:au
666 # 10,416 "AEDT" and domain:au
668 # 14,538 "CST" and domain:au
669 # 5,728 "CDT" and domain:au
670 # 176 "ACST" and domain:au
671 # 29 "ACDT" and domain:au
673 # 7,539 "WST" and domain:au
674 # 68 "AWST" and domain:au
676 # This data suggest that Australians tend to omit the "A" prefix in
677 # practice. The situation for "ST" versus "DT" is less clear, given
678 # the ambiguities involved.
680 # * How do Australians feel about the abbreviations in the tz database?
682 # If you just count Australians on this list, I count 2 in favor and 3
683 # against. One of the "against" votes (David Keegel) counseled delay,
684 # saying that both AEST/AEDT and EST/EST are widely used and
685 # understood in Australia.
687 # From Paul Eggert (1995-12-19):
688 # Shanks & Pottenger report 2:00 for all autumn changes in Australia and NZ.
689 # Mark Prior writes that his newspaper
690 # reports that NSW's fall 1995 change will occur at 2:00,
691 # but Robert Elz says it's been 3:00 in Victoria since 1970
692 # and perhaps the newspaper's `2:00' is referring to standard time.
693 # For now we'll continue to assume 2:00s for changes since 1960.
695 # From Eric Ulevik (1998-01-05):
697 # Here are some URLs to Australian time legislation. These URLs are stable,
698 # and should probably be included in the data file. There are probably more
699 # relevant entries in this database.
701 # NSW (including LHI and Broken Hill):
702 # <a href="http://www.austlii.edu.au/au/legis/nsw/consol_act/sta1987137/index.html">
703 # Standard Time Act 1987 (updated 1995-04-04)
706 # <a href="http://www.austlii.edu.au/au/legis/act/consol_act/stasta1972279/index.html">
707 # Standard Time and Summer Time Act 1972
710 # <a href="http://www.austlii.edu.au/au/legis/sa/consol_act/sta1898137/index.html">
711 # Standard Time Act, 1898
714 # From David Grosz (2005-06-13):
715 # It was announced last week that Daylight Saving would be extended by
716 # one week next year to allow for the 2006 Commonwealth Games.
717 # Daylight Saving is now to end for next year only on the first Sunday
718 # in April instead of the last Sunday in March.
720 # From Gwillim Law (2005-06-14):
721 # I did some Googling and found that all of those states (and territory) plan
722 # to extend DST together in 2006.
723 # ACT: http://www.cmd.act.gov.au/mediareleases/fileread.cfm?file=86.txt
724 # New South Wales: http://www.thecouriermail.news.com.au/common/story_page/0,5936,15538869%255E1702,00.html
725 # South Australia: http://www.news.com.au/story/0,10117,15555031-1246,00.html
726 # Tasmania: http://www.media.tas.gov.au/release.php?id=14772
727 # Victoria: I wasn't able to find anything separate, but the other articles
730 # http://www.news.com.au/story/0,10117,15564030-1248,00.html.
734 # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
735 # # The NORTHERN TERRITORY.. [ Courtesy N.T. Dept of the Chief Minister ]
737 # # N.T. have never utilised any DST due to sub-tropical/tropical location.
739 # Zone Australia/North 9:30 - CST
741 # From Bradley White (1991-03-04):
742 # A recent excerpt from an Australian newspaper...
743 # the Northern Territory do[es] not have daylight saving.
747 # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
748 # # The state of WESTERN AUSTRALIA.. [ Courtesy W.A. dept Premier+Cabinet ]
750 # # W.A. suffers from a great deal of public and political opposition to
751 # # DST in principle. A bill is brought before parliament in most years, but
752 # # usually defeated either in the upper house, or in party caucus
753 # # before reaching parliament.
755 # Zone Australia/West 8:00 AW %sST
757 # Rule AW 1974 only - Oct lastSun 2:00 1:00 D
758 # Rule AW 1975 only - Mar Sun>=1 3:00 0 W
759 # Rule AW 1983 only - Oct lastSun 2:00 1:00 D
760 # Rule AW 1984 only - Mar Sun>=1 3:00 0 W
762 # From Bradley White (1991-03-04):
763 # A recent excerpt from an Australian newspaper...
764 # Western Australia...do[es] not have daylight saving.
766 # From John D. Newman via Bradley White (1991-11-02):
767 # Western Australia is still on "winter time". Some DH in Sydney
768 # rang me at home a few days ago at 6.00am. (He had just arrived at
770 # W.A. is switching to Summer Time on Nov 17th just to confuse
773 # From Arthur David Olson (1992-03-08):
774 # The 1992 ending date used in the rules is a best guess;
775 # it matches what was used in the past.
777 # <a href="http://www.bom.gov.au/faq/faqgen.htm">
778 # The Australian Bureau of Meteorology FAQ
779 # </a> (1999-09-27) writes that Giles Meteorological Station uses
780 # South Australian time even though it's located in Western Australia.
783 # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
784 # # The state of QUEENSLAND.. [ Courtesy Qld. Dept Premier Econ&Trade Devel ]
787 # Zone Australia/Queensland 10:00 AQ %sST
789 # Rule AQ 1971 only - Oct lastSun 2:00 1:00 D
790 # Rule AQ 1972 only - Feb lastSun 3:00 0 E
791 # Rule AQ 1989 max - Oct lastSun 2:00 1:00 D
792 # Rule AQ 1990 max - Mar Sun>=1 3:00 0 E
794 # From Bradley White (1989-12-24):
795 # "Australia/Queensland" now observes daylight time (i.e. from
798 # From Bradley White (1991-03-04):
799 # A recent excerpt from an Australian newspaper...
800 # ...Queensland...[has] agreed to end daylight saving
801 # at 3am tomorrow (March 3)...
803 # From John Mackin (1991-03-06):
804 # I can certainly confirm for my part that Daylight Saving in NSW did in fact
805 # end on Sunday, 3 March. I don't know at what hour, though. (It surprised
808 # From Bradley White (1992-03-08):
809 # ...there was recently a referendum in Queensland which resulted
810 # in the experimental daylight saving system being abandoned. So, ...
812 # Rule QLD 1989 1991 - Oct lastSun 2:00 1:00 D
813 # Rule QLD 1990 1992 - Mar Sun>=1 3:00 0 S
816 # From Arthur David Olson (1992-03-08):
817 # The chosen rules the union of the 1971/1972 change and the 1989-1992 changes.
819 # From Rives McDow (2002-04-09):
820 # The most interesting region I have found consists of three towns on the
821 # southern coast of Australia, population 10 at last report, along with
822 # 50,000 sheep, about 100 kilometers long and 40 kilometers into the
823 # continent. The primary town is Madura, with the other towns being
824 # Mundrabilla and Eucla. According to the sheriff of Madura, the
825 # residents got tired of having to change the time so often, as they are
826 # located in a strip overlapping the border of South Australia and Western
827 # Australia. South Australia observes daylight saving time; Western
828 # Australia does not. The two states are one and a half hours apart. The
829 # residents decided to forget about this nonsense of changing the clock so
830 # much and set the local time 20 hours and 45 minutes from the
831 # international date line, or right in the middle of the time of South
832 # Australia and Western Australia. As it only affects about 10 people and
833 # tourists staying at the Madura Motel, it has never really made as big an
834 # impact as Broken Hill. However, as tourist visiting there or anyone
835 # calling the local sheriff will attest, they do keep time in this way.
837 # From Paul Eggert (2002-04-09):
838 # This is confirmed by the section entitled
839 # "What's the deal with time zones???" in
840 # <http://www.earthsci.unimelb.edu.au/~awatkins/null.html>,
841 # which says a few other things:
843 # * Border Village, SA also is 45 minutes ahead of Perth.
844 # * The locals call this time zone "central W.A. Time" (presumably "CWAT").
845 # * The locals also call Western Australia time "Perth time".
847 # It's not clear from context whether everyone in Western Australia
848 # knows of this naming convention, or whether it's just the people in
851 # South Australia, Tasmania, Victoria
853 # From Arthur David Olson (1992-03-08):
854 # The rules from version 7.1 follow.
855 # There are lots of differences between these rules and
856 # the Shepherd et al. rules. Since the Shepherd et al. rules
857 # and Bradley White's newspaper article are in agreement on
858 # current DST ending dates, no worries.
860 # Rule Oz 1971 1985 - Oct lastSun 2:00 1:00 -
861 # Rule Oz 1986 max - Oct Sun>=18 2:00 1:00 -
862 # Rule Oz 1972 only - Feb 27 3:00 0 -
863 # Rule Oz 1973 1986 - Mar Sun>=1 3:00 0 -
864 # Rule Oz 1987 max - Mar Sun>=15 3:00 0 -
865 # Zone Australia/Tasmania 10:00 Oz EST
866 # Zone Australia/South 9:30 Oz CST
867 # Zone Australia/Victoria 10:00 Oz EST 1985 Oct lastSun 2:00
868 # 10:00 1:00 EST 1986 Mar Sun>=15 3:00
871 # From Robert Elz (1991-03-06):
872 # I believe that the current start date for DST is "lastSun" in Oct...
873 # that changed Oct 89. That is, we're back to the
874 # original rule, and that rule currently applies in all the states
875 # that have dst, incl Qld. (Certainly it was true in Vic).
876 # The file I'm including says that happened in 1988, I think
877 # that's incorrect, but I'm not 100% certain.
881 # From Bradley White (1991-03-04):
882 # A recent excerpt from an Australian newspaper...
883 # ...South Australia...[has] agreed to end daylight saving
884 # at 3am tomorrow (March 3)...
886 # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
887 # # The state of SOUTH AUSTRALIA....[ Courtesy of S.A. Dept of Labour ]
890 # Zone Australia/South 9:30 AS %sST
892 # Rule AS 1971 max - Oct lastSun 2:00 1:00 D
893 # Rule AS 1972 1985 - Mar Sun>=1 3:00 0 C
894 # Rule AS 1986 1990 - Mar Sun>=15 3:00 0 C
895 # Rule AS 1991 max - Mar Sun>=1 3:00 0 C
897 # From Bradley White (1992-03-11):
898 # Recent correspondence with a friend in Adelaide
899 # contained the following exchange: "Due to the Adelaide Festival,
900 # South Australia delays setting back our clocks for a few weeks."
902 # From Robert Elz (1992-03-13):
903 # I heard that apparently (or at least, it appears that)
904 # South Aus will have an extra 3 weeks daylight saving every even
905 # numbered year (from 1990). That's when the Adelaide Festival
908 # From Robert Elz (1992-03-16, 00:57:07 +1000):
909 # DST didn't end in Adelaide today (yesterday)....
910 # But whether it's "4th Sunday" or "2nd last Sunday" I have no idea whatever...
911 # (it's just as likely to be "the Sunday we pick for this year"...).
913 # From Bradley White (1994-04-11):
914 # If Sun, 15 March, 1992 was at +1030 as kre asserts, but yet Sun, 20 March,
915 # 1994 was at +0930 as John Connolly's customer seems to assert, then I can
916 # only conclude that the actual rule is more complicated....
918 # From John Warburton (1994-10-07):
919 # The new Daylight Savings dates for South Australia ...
920 # was gazetted in the Government Hansard on Sep 26 1994....
921 # start on last Sunday in October and end in last sunday in March.
925 # The rules for 1967 through 1991 were reported by George Shepherd
926 # via Simon Woodhead via Robert Elz (1991-03-06):
927 # # The state of TASMANIA.. [Courtesy Tasmanian Dept of Premier + Cabinet ]
930 # From Bill Hart via Guy Harris (1991-10-10):
931 # Oh yes, the new daylight savings rules are uniquely tasmanian, we have
932 # 6 weeks a year now when we are out of sync with the rest of Australia
933 # (but nothing new about that).
935 # From Alex Livingston (1999-10-04):
936 # I heard on the ABC (Australian Broadcasting Corporation) radio news on the
937 # (long) weekend that Tasmania, which usually goes its own way in this regard,
938 # has decided to join with most of NSW, the ACT, and most of Victoria
939 # (Australia) and start daylight saving on the last Sunday in August in 2000
940 # instead of the first Sunday in October.
942 # Sim Alam (2000-07-03) reported a legal citation for the 2000/2001 rules:
943 # http://www.thelaw.tas.gov.au/fragview/42++1968+GS3A@EN+2000070300
947 # The rules for 1971 through 1991 were reported by George Shepherd
948 # via Simon Woodhead via Robert Elz (1991-03-06):
949 # # The state of VICTORIA.. [ Courtesy of Vic. Dept of Premier + Cabinet ]
952 # From Scott Harrington (2001-08-29):
953 # On KQED's "City Arts and Lectures" program last night I heard an
954 # interesting story about daylight savings time. Dr. John Heilbron was
955 # discussing his book "The Sun in the Church: Cathedrals as Solar
956 # Observatories"[1], and in particular the Shrine of Remembrance[2] located
957 # in Melbourne, Australia.
959 # Apparently the shrine's main purpose is a beam of sunlight which
960 # illuminates a special spot on the floor at the 11th hour of the 11th day
961 # of the 11th month (Remembrance Day) every year in memory of Australia's
962 # fallen WWI soldiers. And if you go there on Nov. 11, at 11am local time,
963 # you will indeed see the sunbeam illuminate the special spot at the
966 # However, that is only because of some special mirror contraption that had
967 # to be employed, since due to daylight savings time, the true solar time of
968 # the remembrance moment occurs one hour later (or earlier?). Perhaps
969 # someone with more information on this jury-rig can tell us more.
971 # [1] http://www.hup.harvard.edu/catalog/HEISUN.html
972 # [2] http://www.shrine.org.au
976 # From Arthur David Olson:
977 # New South Wales and subjurisdictions have their own ideas of a fun time.
978 # Based on law library research by John Mackin,
980 # In Australia, time is not legislated federally, but rather by the
981 # individual states. Thus, while such terms as ``Eastern Standard Time''
982 # [I mean, of course, Australian EST, not any other kind] are in common
983 # use, _they have NO REAL MEANING_, as they are not defined in the
984 # legislation. This is very important to understand.
985 # I have researched New South Wales time only...
987 # From Eric Ulevik (1999-05-26):
988 # DST will start in NSW on the last Sunday of August, rather than the usual
989 # October in 2000. [See: Matthew Moore,
990 # <a href="http://www.smh.com.au/news/9905/26/pageone/pageone4.html">
991 # Two months more daylight saving
993 # Sydney Morning Herald (1999-05-26).]
995 # From Paul Eggert (1999-09-27):
996 # See the following official NSW source:
997 # <a href="http://dir.gis.nsw.gov.au/cgi-bin/genobject/document/other/daylightsaving/tigGmZ">
998 # Daylight Saving in New South Wales.
1001 # Narrabri Shire (NSW) council has announced it will ignore the extension of
1002 # daylight saving next year. See:
1003 # <a href="http://abc.net.au/news/regionals/neweng/monthly/regeng-22jul1999-1.htm">
1004 # Narrabri Council to ignore daylight saving
1005 # </a> (1999-07-22). For now, we'll wait to see if this really happens.
1007 # Victoria will following NSW. See:
1008 # <a href="http://abc.net.au/local/news/olympics/1999/07/item19990728112314_1.htm">
1009 # Vic to extend daylight saving
1010 # </a> (1999-07-28).
1012 # However, South Australia rejected the DST request. See:
1013 # <a href="http://abc.net.au/news/olympics/1999/07/item19990719151754_1.htm">
1014 # South Australia rejects Olympics daylight savings request
1015 # </a> (1999-07-19).
1017 # Queensland also will not observe DST for the Olympics. See:
1018 # <a href="http://abc.net.au/news/olympics/1999/06/item19990601114608_1.htm">
1019 # Qld says no to daylight savings for Olympics
1020 # </a> (1999-06-01), which quotes Queensland Premier Peter Beattie as saying
1021 # ``Look you've got to remember in my family when this came up last time
1022 # I voted for it, my wife voted against it and she said to me it's all very
1023 # well for you, you don't have to worry about getting the children out of
1024 # bed, getting them to school, getting them to sleep at night.
1025 # I've been through all this argument domestically...my wife rules.''
1027 # Broken Hill will stick with South Australian time in 2000. See:
1028 # <a href="http://abc.net.au/news/regionals/brokenh/monthly/regbrok-21jul1999-6.htm">
1029 # Broken Hill to be behind the times
1030 # </a> (1999-07-21).
1032 # IATA SSIM (1998-09) says that the spring 2000 change for Australian
1033 # Capital Territory, New South Wales except Lord Howe Island and Broken
1034 # Hill, and Victoria will be August 27, presumably due to the Sydney Olympics.
1036 # From Eric Ulevik, referring to Sydney's Sun Herald (2000-08-13), page 29:
1037 # The Queensland Premier Peter Beattie is encouraging northern NSW
1038 # towns to use Queensland time.
1042 # From John Mackin (1989-01-04):
1043 # `Broken Hill' means the County of Yancowinna.
1045 # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
1046 # # YANCOWINNA.. [ Confirmation courtesy of Broken Hill Postmaster ]
1049 # # Yancowinna uses Central Standard Time, despite [its] location on the
1050 # # New South Wales side of the S.A. border. Most business and social dealings
1051 # # are with CST zones, therefore CST is legislated by local government
1052 # # although the switch to Summer Time occurs in line with N.S.W. There have
1053 # # been years when this did not apply, but the historical data is not
1054 # # presently available.
1055 # Zone Australia/Yancowinna 9:30 AY %sST
1057 # Rule AY 1971 1985 - Oct lastSun 2:00 1:00 D
1058 # Rule AY 1972 only - Feb lastSun 3:00 0 C
1059 # [followed by other Rules]
1063 # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
1064 # LHI... [ Courtesy of Pauline Van Winsen ]
1066 # Lord Howe Island is located off the New South Wales coast, and is half an
1067 # hour ahead of NSW time.
1069 # From James Lonergan, Secretary, Lord Howe Island Board (2000-01-27):
1070 # Lord Howe Island summer time in 2000/2001 will commence on the same
1071 # date as the rest of NSW (i.e. 2000-08-27). For your information the
1072 # Lord Howe Island Board (controlling authority for the Island) is
1073 # seeking the community's views on various options for summer time
1074 # arrangements on the Island, e.g. advance clocks by 1 full hour
1075 # instead of only 30 minutes. Dependant on the wishes of residents
1076 # the Board may approach the NSW government to change the existing
1077 # arrangements. The starting date for summer time on the Island will
1078 # however always coincide with the rest of NSW.
1080 # From James Lonergan, Secretary, Lord Howe Island Board (2000-10-25):
1081 # Lord Howe Island advances clocks by 30 minutes during DST in NSW and retards
1082 # clocks by 30 minutes when DST finishes. Since DST was most recently
1083 # introduced in NSW, the "changeover" time on the Island has been 02:00 as
1084 # shown on clocks on LHI. I guess this means that for 30 minutes at the start
1085 # of DST, LHI is actually 1 hour ahead of the rest of NSW.
1087 # From Paul Eggert (2006-03-22):
1088 # For Lord Howe dates we use Shanks & Pottenger through 1989, and
1089 # Lonergan thereafter. For times we use Lonergan.
1091 ###############################################################################
1095 # From Mark Davies (1990-10-03):
1096 # the 1989/90 year was a trial of an extended "daylight saving" period.
1097 # This trial was deemed successful and the extended period adopted for
1098 # subsequent years (with the addition of a further week at the start).
1099 # source -- phone call to Ministry of Internal Affairs Head Office.
1101 # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
1102 # # The Country of New Zealand (Australia's east island -) Gee they hate that!
1103 # # or is Australia the west island of N.Z.
1104 # # [ courtesy of Geoff Tribble.. Auckland N.Z. ]
1107 # Rule NZ 1974 1988 - Oct lastSun 2:00 1:00 D
1108 # Rule NZ 1989 max - Oct Sun>=1 2:00 1:00 D
1109 # Rule NZ 1975 1989 - Mar Sun>=1 3:00 0 S
1110 # Rule NZ 1990 max - Mar lastSun 3:00 0 S
1112 # Zone NZ 12:00 NZ NZ%sT # New Zealand
1113 # Zone NZ-CHAT 12:45 - NZ-CHAT # Chatham Island
1115 # From Arthur David Olson (1992-03-08):
1116 # The chosen rules use the Davies October 8 values for the start of DST in 1989
1117 # rather than the October 1 value.
1119 # From Paul Eggert (1995-12-19);
1120 # Shank & Pottenger report 2:00 for all autumn changes in Australia and NZ.
1121 # Robert Uzgalis writes that the New Zealand Daylight
1122 # Savings Time Order in Council dated 1990-06-18 specifies 2:00 standard
1123 # time on both the first Sunday in October and the third Sunday in March.
1124 # As with Australia, we'll assume the tradition is 2:00s, not 2:00.
1126 # From Paul Eggert (2006-03-22):
1127 # The Department of Internal Affairs (DIA) maintains a brief history,
1128 # as does Carol Squires; see tz-link.htm for the full references.
1129 # Use these sources in preference to Shanks & Pottenger.
1131 # For Chatham, IATA SSIM (1991/1999) gives the NZ rules but with
1132 # transitions at 2:45 local standard time; this confirms that Chatham
1133 # is always exactly 45 minutes ahead of Auckland.
1135 ###############################################################################
1140 # Howse writes (p 153) that in 1879 the British governor of Fiji
1141 # enacted an ordinance standardizing the islands on Antipodean Time
1142 # instead of the American system (which was one day behind).
1144 # From Rives McDow (1998-10-08):
1145 # Fiji will introduce DST effective 0200 local time, 1998-11-01
1146 # until 0300 local time 1999-02-28. Each year the DST period will
1147 # be from the first Sunday in November until the last Sunday in February.
1149 # From Paul Eggert (2000-01-08):
1150 # IATA SSIM (1999-09) says DST ends 0100 local time. Go with McDow.
1152 # From the BBC World Service (1998-10-31 11:32 UTC):
1153 # The Fijiian government says the main reasons for the time change is to
1154 # improve productivity and reduce road accidents. But correspondents say it
1155 # also hopes the move will boost Fiji's ability to compete with other pacific
1156 # islands in the effort to attract tourists to witness the dawning of the new
1159 # http://www.fiji.gov.fj/press/2000_09/2000_09_13-05.shtml (2000-09-13)
1160 # reports that Fiji has discontinued DST.
1164 # Johnston data is from usno1995.
1169 # From Paul Eggert (1996-01-22):
1170 # Today's _Wall Street Journal_ (page 1) reports that Kiribati
1171 # ``declared it the same day throught the country as of Jan. 1, 1995''
1172 # as part of the competition to be first into the 21st century.
1177 # In comp.risks 14.87 (26 August 1993), Peter Neumann writes:
1178 # I wonder what happened in Kwajalein, where there was NO Friday,
1179 # 1993-08-20. Thursday night at midnight Kwajalein switched sides with
1180 # respect to the International Date Line, to rejoin its fellow islands,
1181 # going from 11:59 p.m. Thursday to 12:00 m. Saturday in a blink.
1184 # N Mariana Is, Guam
1186 # Howse writes (p 153) ``The Spaniards, on the other hand, reached the
1187 # Philippines and the Ladrones from America,'' and implies that the Ladrones
1188 # (now called the Marianas) kept American date for quite some time.
1189 # For now, we assume the Ladrones switched at the same time as the Philippines;
1192 # US Public Law 106-564 (2000-12-23) made UTC+10 the official standard time,
1193 # under the name "Chamorro Standard Time". There is no official abbreviation,
1194 # but Congressman Robert A. Underwood, author of the bill that became law,
1195 # wrote in a press release (2000-12-27) that he will seek the use of "ChST".
1200 # Alan Eugene Davis writes (1996-03-16),
1201 # ``I am certain, having lived there for the past decade, that "Truk"
1202 # (now properly known as Chuuk) ... is in the time zone GMT+10.''
1204 # Shanks & Pottenger write that Truk switched from UTC+10 to UTC+11
1205 # on 1978-10-01; ignore this for now.
1207 # From Paul Eggert (1999-10-29):
1208 # The Federated States of Micronesia Visitors Board writes in
1209 # <a href="http://www.fsmgov.org/info/clocks.html">
1210 # The Federated States of Micronesia - Visitor Information
1212 # that Truk and Yap are UTC+10, and Ponape and Kosrae are UTC+11.
1213 # We don't know when Kosrae switched from UTC+12; assume January 1 for now.
1218 # From Charles T O'Connor, KMTH DJ (1956),
1219 # quoted in the KTMH section of the Radio Heritage Collection
1220 # <http://radiodx.com/spdxr/KMTH.htm> (2002-12-31):
1221 # For the past two months we've been on what is known as Daylight
1222 # Saving Time. This time has put us on air at 5am in the morning,
1223 # your time down there in New Zealand. Starting September 2, 1956
1224 # we'll again go back to Standard Time. This'll mean that we'll go to
1225 # air at 6am your time.
1227 # From Paul Eggert (2003-03-23):
1228 # We don't know the date of that quote, but we'll guess they
1229 # started DST on June 3. Possibly DST was observed other years
1230 # in Midway, but we have no record of it.
1235 # From Rives McDow (1999-11-08):
1236 # A Proclamation was signed by the Governor of Pitcairn on the 27th March 1998
1237 # with regard to Pitcairn Standard Time. The Proclamation is as follows.
1239 # The local time for general purposes in the Islands shall be
1240 # Co-ordinated Universal time minus 8 hours and shall be known
1241 # as Pitcairn Standard Time.
1243 # ... I have also seen Pitcairn listed as UTC minus 9 hours in several
1244 # references, and can only assume that this was an error in interpretation
1245 # somehow in light of this proclamation.
1247 # From Rives McDow (1999-11-09):
1248 # The Proclamation regarding Pitcairn time came into effect on 27 April 1998
1251 # From Howie Phelps (1999-11-10), who talked to a Pitcairner via shortwave:
1252 # Betty Christian told me yesterday that their local time is the same as
1253 # Pacific Standard Time. They used to be 1/2 hour different from us here in
1254 # Sacramento but it was changed a couple of years ago.
1259 # Howse writes (p 153, citing p 10 of the 1883-11-18 New York Herald)
1260 # that in 1879 the King of Samoa decided to change
1261 # ``the date in his kingdom from the Antipodean to the American system,
1262 # ordaining -- by a masterpiece of diplomatic flattery -- that
1263 # the Fourth of July should be celebrated twice in that year.''
1268 # From Paul Eggert (1996-01-22):
1269 # Today's _Wall Street Journal_ (p 1) reports that ``Tonga has been plotting
1270 # to sneak ahead of [New Zealanders] by introducing daylight-saving time.''
1271 # Since Kiribati has moved the Date Line it's not clear what Tonga will do.
1273 # Don Mundell writes in the 1997-02-20 Tonga Chronicle
1274 # <a href="http://www.tongatapu.net.to/tonga/homeland/timebegins.htm">
1275 # How Tonga became `The Land where Time Begins'
1278 # Until 1941 Tonga maintained a standard time 50 minutes ahead of NZST
1279 # 12 hours and 20 minutes ahead of GMT. When New Zealand adjusted its
1280 # standard time in 1940s, Tonga had the choice of subtracting from its
1281 # local time to come on the same standard time as New Zealand or of
1282 # advancing its time to maintain the differential of 13 degrees
1283 # (approximately 50 minutes ahead of New Zealand time).
1285 # Because His Majesty King Taufa'ahau Tupou IV, then Crown Prince
1286 # Tungi, preferred to ensure Tonga's title as the land where time
1287 # begins, the Legislative Assembly approved the latter change.
1289 # But some of the older, more conservative members from the outer
1290 # islands objected. "If at midnight on Dec. 31, we move ahead 40
1291 # minutes, as your Royal Highness wishes, what becomes of the 40
1292 # minutes we have lost?"
1294 # The Crown Prince, presented an unanswerable argument: "Remember that
1295 # on the World Day of Prayer, you would be the first people on Earth
1296 # to say your prayers in the morning."
1298 # From Paul Eggert (2006-03-22):
1299 # Shanks & Pottenger say the transition was on 1968-10-01; go with Mundell.
1301 # From Eric Ulevik (1999-05-03):
1302 # Tonga's director of tourism, who is also secretary of the National Millenium
1303 # Committee, has a plan to get Tonga back in front.
1304 # He has proposed a one-off move to tropical daylight saving for Tonga from
1305 # October to March, which has won approval in principle from the Tongan
1308 # From Steffen Thorsen (1999-09-09):
1309 # * Tonga will introduce DST in November
1311 # I was given this link by John Letts:
1312 # <a hef="http://news.bbc.co.uk/hi/english/world/asia-pacific/newsid_424000/424764.stm">
1313 # http://news.bbc.co.uk/hi/english/world/asia-pacific/newsid_424000/424764.stm
1316 # I have not been able to find exact dates for the transition in November
1317 # yet. By reading this article it seems like Fiji will be 14 hours ahead
1318 # of UTC as well, but as far as I know Fiji will only be 13 hours ahead
1319 # (12 + 1 hour DST).
1321 # From Arthur David Olson (1999-09-20):
1322 # According to <a href="http://www.tongaonline.com/news/sept1799.html>
1323 # http://www.tongaonline.com/news/sept1799.html
1325 # "Daylight Savings Time will take effect on Oct. 2 through April 15, 2000
1326 # and annually thereafter from the first Saturday in October through the
1327 # third Saturday of April. Under the system approved by Privy Council on
1328 # Sept. 10, clocks must be turned ahead one hour on the opening day and
1329 # set back an hour on the closing date."
1330 # Alas, no indication of the time of day.
1332 # From Rives McDow (1999-10-06):
1333 # Tonga started its Daylight Saving on Saturday morning October 2nd at 0200am.
1334 # Daylight Saving ends on April 16 at 0300am which is Sunday morning.
1336 # From Steffen Thorsen (2000-10-31):
1337 # Back in March I found a notice on the website http://www.tongaonline.com
1338 # that Tonga changed back to standard time one month early, on March 19
1339 # instead of the original reported date April 16. Unfortunately, the article
1340 # is no longer available on the site, and I did not make a copy of the
1341 # text, and I have forgotten to report it here.
1342 # (Original URL was: http://www.tongaonline.com/news/march162000.htm )
1344 # From Rives McDow (2000-12-01):
1345 # Tonga is observing DST as of 2000-11-04 and will stop on 2001-01-27.
1347 # From Sione Moala-Mafi (2001-09-20) via Rives McDow:
1348 # At 2:00am on the first Sunday of November, the standard time in the Kingdom
1349 # shall be moved forward by one hour to 3:00am. At 2:00am on the last Sunday
1350 # of January the standard time in the Kingdom shall be moved backward by one
1353 # From Pulu 'Anau (2002-11-05):
1354 # The law was for 3 years, supposedly to get renewed. It wasn't.
1359 # From Vernice Anderson, Personal Secretary to Philip Jessup,
1360 # US Ambassador At Large (oral history interview, 1971-02-02):
1362 # Saturday, the 14th [of October, 1950] -- ... The time was all the
1363 # more confusing at that point, because we had crossed the
1364 # International Date Line, thus getting two Sundays. Furthermore, we
1365 # discovered that Wake Island had two hours of daylight saving time
1366 # making calculation of time in Washington difficult if not almost
1369 # http://www.trumanlibrary.org/wake/meeting.htm
1371 # From Paul Eggert (2003-03-23):
1372 # We have no other report of DST in Wake Island, so omit this info for now.
1374 ###############################################################################
1376 # The International Date Line
1378 # From Gwillim Law (2000-01-03):
1380 # The International Date Line is not defined by any international standard,
1381 # convention, or treaty. Mapmakers are free to draw it as they please.
1382 # Reputable mapmakers will simply ensure that every point of land appears on
1383 # the correct side of the IDL, according to the date legally observed there.
1385 # When Kiribati adopted a uniform date in 1995, thereby moving the Phoenix and
1386 # Line Islands to the west side of the IDL (or, if you prefer, moving the IDL
1387 # to the east side of the Phoenix and Line Islands), I suppose that most
1388 # mapmakers redrew the IDL following the boundary of Kiribati. Even that line
1389 # has a rather arbitrary nature. The straight-line boundaries between Pacific
1390 # island nations that are shown on many maps are based on an international
1391 # convention, but are not legally binding national borders.... The date is
1392 # governed by the IDL; therefore, even on the high seas, there may be some
1393 # places as late as fourteen hours later than UTC. And, since the IDL is not
1394 # an international standard, there are some places on the high seas where the
1395 # correct date is ambiguous.
1397 # From Wikipedia <http://en.wikipedia.org/wiki/Time_zone> (2005-08-31):
1398 # Before 1920, all ships kept local apparent time on the high seas by setting
1399 # their clocks at night or at the morning sight so that, given the ship's
1400 # speed and direction, it would be 12 o'clock when the Sun crossed the ship's
1401 # meridian (12 o'clock = local apparent noon). During 1917, at the
1402 # Anglo-French Conference on Time-keeping at Sea, it was recommended that all
1403 # ships, both military and civilian, should adopt hourly standard time zones
1404 # on the high seas. Whenever a ship was within the territorial waters of any
1405 # nation it would use that nation's standard time. The captain was permitted
1406 # to change his ship's clocks at a time of his choice following his ship's
1407 # entry into another zone time--he often chose midnight. These zones were
1408 # adopted by all major fleets between 1920 and 1925 but not by many
1409 # independent merchant ships until World War II.
1411 # From Paul Eggert, using references suggested by Oscar van Vlijmen
1414 # The American Practical Navigator (2002)
1415 # <http://pollux.nss.nima.mil/pubs/pubs_j_apn_sections.html?rid=187>
1416 # talks only about the 180-degree meridian with respect to ships in
1417 # international waters; it ignores the international date line.
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