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
32 Zone Australia/Perth 7:43:24 - LMT 1895 Dec
34 8:00 - WST 1974 Oct lastSun 2:00s
35 8:00 1:00 WST 1975 Mar Sun>=1 2:00s
36 8:00 - WST 1983 Oct lastSun 2:00s
37 8:00 1:00 WST 1984 Mar Sun>=1 2:00s
38 8:00 - WST 1991 Nov 17 2:00s
39 8:00 1:00 WST 1992 Mar Sun>=1 2:00s
43 # From Alex Livingston (1996-11-01):
44 # I have heard or read more than once that some resort islands off the coast
45 # of Queensland chose to keep observing daylight-saving time even after
46 # Queensland ceased to.
48 # From Paul Eggert (1996-11-22):
49 # IATA SSIM (1993-02/1994-09) say that the Holiday Islands (Hayman, Lindeman,
50 # Hamilton) observed DST for two years after the rest of Queensland stopped.
51 # Hamilton is the largest, but there is also a Hamilton in Victoria,
54 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
55 Rule AQ 1971 only - Oct lastSun 2:00s 1:00 -
56 Rule AQ 1972 only - Feb lastSun 2:00s 0 -
57 Rule AQ 1989 1991 - Oct lastSun 2:00s 1:00 -
58 Rule AQ 1990 1992 - Mar Sun>=1 2:00s 0 -
59 Rule Holiday 1992 1993 - Oct lastSun 2:00s 1:00 -
60 Rule Holiday 1993 1994 - Mar Sun>=1 2:00s 0 -
61 Zone Australia/Brisbane 10:12:08 - LMT 1895
64 Zone Australia/Lindeman 9:55:56 - LMT 1895
70 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
71 Rule AS 1971 1985 - Oct lastSun 2:00s 1:00 -
72 Rule AS 1986 only - Oct 19 2:00s 1:00 -
73 Rule AS 1987 max - Oct lastSun 2:00s 1:00 -
74 Rule AS 1972 only - Feb 27 2:00s 0 -
75 Rule AS 1973 1985 - Mar Sun>=1 2:00s 0 -
76 Rule AS 1986 1989 - Mar Sun>=15 2:00s 0 -
77 Rule AS 1990 only - Mar Sun>=18 2:00s 0 -
78 Rule AS 1991 only - Mar Sun>=1 2:00s 0 -
79 Rule AS 1992 only - Mar Sun>=18 2:00s 0 -
80 Rule AS 1993 only - Mar Sun>=1 2:00s 0 -
81 Rule AS 1994 only - Mar Sun>=18 2:00s 0 -
82 Rule AS 1995 2005 - Mar lastSun 2:00s 0 -
83 Rule AS 2006 only - Apr Sun>=1 2:00s 0 -
84 Rule AS 2007 max - Mar lastSun 2:00s 0 -
85 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
86 Zone Australia/Adelaide 9:14:20 - LMT 1895 Feb
93 # From Paul Eggert (2005-08-16):
94 # <http://www.bom.gov.au/climate/averages/tables/dst_times.shtml>
95 # says King Island didn't observe DST from WWII until late 1971.
97 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
98 Rule AT 1967 only - Oct Sun>=1 2:00s 1:00 -
99 Rule AT 1968 only - Mar lastSun 2:00s 0 -
100 Rule AT 1968 1985 - Oct lastSun 2:00s 1:00 -
101 Rule AT 1969 1971 - Mar Sun>=8 2:00s 0 -
102 Rule AT 1972 only - Feb lastSun 2:00s 0 -
103 Rule AT 1973 1981 - Mar Sun>=1 2:00s 0 -
104 Rule AT 1982 1983 - Mar lastSun 2:00s 0 -
105 Rule AT 1984 1986 - Mar Sun>=1 2:00s 0 -
106 Rule AT 1986 only - Oct Sun>=15 2:00s 1:00 -
107 Rule AT 1987 1990 - Mar Sun>=15 2:00s 0 -
108 Rule AT 1987 only - Oct Sun>=22 2:00s 1:00 -
109 Rule AT 1988 1990 - Oct lastSun 2:00s 1:00 -
110 Rule AT 1991 1999 - Oct Sun>=1 2:00s 1:00 -
111 Rule AT 1991 2005 - Mar lastSun 2:00s 0 -
112 Rule AT 2000 only - Aug lastSun 2:00s 1:00 -
113 Rule AT 2001 max - Oct Sun>=1 2:00s 1:00 -
114 Rule AT 2006 only - Apr Sun>=1 2:00s 0 -
115 Rule AT 2007 max - Mar lastSun 2:00s 0 -
116 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
117 Zone Australia/Hobart 9:49:16 - LMT 1895 Sep
118 10:00 - EST 1916 Oct 1 2:00
119 10:00 1:00 EST 1917 Feb
122 Zone Australia/Currie 9:35:28 - LMT 1895 Sep
123 10:00 - EST 1916 Oct 1 2:00
124 10:00 1:00 EST 1917 Feb
125 10:00 Aus EST 1971 Jul
129 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
130 Rule AV 1971 1985 - Oct lastSun 2:00s 1:00 -
131 Rule AV 1972 only - Feb lastSun 2:00s 0 -
132 Rule AV 1973 1985 - Mar Sun>=1 2:00s 0 -
133 Rule AV 1986 1990 - Mar Sun>=15 2:00s 0 -
134 Rule AV 1986 1987 - Oct Sun>=15 2:00s 1:00 -
135 Rule AV 1988 1999 - Oct lastSun 2:00s 1:00 -
136 Rule AV 1991 1994 - Mar Sun>=1 2:00s 0 -
137 Rule AV 1995 2005 - Mar lastSun 2:00s 0 -
138 Rule AV 2000 only - Aug lastSun 2:00s 1:00 -
139 Rule AV 2001 max - Oct lastSun 2:00s 1:00 -
140 Rule AV 2006 only - Apr Sun>=1 2:00s 0 -
141 Rule AV 2007 max - Mar lastSun 2:00s 0 -
142 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
143 Zone Australia/Melbourne 9:39:52 - LMT 1895 Feb
148 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
149 Rule AN 1971 1985 - Oct lastSun 2:00s 1:00 -
150 Rule AN 1972 only - Feb 27 2:00s 0 -
151 Rule AN 1973 1981 - Mar Sun>=1 2:00s 0 -
152 Rule AN 1982 only - Apr Sun>=1 2:00s 0 -
153 Rule AN 1983 1985 - Mar Sun>=1 2:00s 0 -
154 Rule AN 1986 1989 - Mar Sun>=15 2:00s 0 -
155 Rule AN 1986 only - Oct 19 2:00s 1:00 -
156 Rule AN 1987 1999 - Oct lastSun 2:00s 1:00 -
157 Rule AN 1990 1995 - Mar Sun>=1 2:00s 0 -
158 Rule AN 1996 2005 - Mar lastSun 2:00s 0 -
159 Rule AN 2000 only - Aug lastSun 2:00s 1:00 -
160 Rule AN 2001 max - Oct lastSun 2:00s 1:00 -
161 Rule AN 2006 only - Apr Sun>=1 2:00s 0 -
162 Rule AN 2007 max - Mar lastSun 2:00s 0 -
163 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
164 Zone Australia/Sydney 10:04:52 - LMT 1895 Feb
167 Zone Australia/Broken_Hill 9:25:48 - LMT 1895 Feb
168 10:00 - EST 1896 Aug 23
175 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
176 Rule LH 1981 1984 - Oct lastSun 2:00 1:00 -
177 Rule LH 1982 1985 - Mar Sun>=1 2:00 0 -
178 Rule LH 1985 only - Oct lastSun 2:00 0:30 -
179 Rule LH 1986 1989 - Mar Sun>=15 2:00 0 -
180 Rule LH 1986 only - Oct 19 2:00 0:30 -
181 Rule LH 1987 1999 - Oct lastSun 2:00 0:30 -
182 Rule LH 1990 1995 - Mar Sun>=1 2:00 0 -
183 Rule LH 1996 2005 - Mar lastSun 2:00 0 -
184 Rule LH 2000 only - Aug lastSun 2:00 0:30 -
185 Rule LH 2001 max - Oct lastSun 2:00 0:30 -
186 Rule LH 2006 only - Apr Sun>=1 2:00 0 -
187 Rule LH 2007 max - Mar lastSun 2:00 0 -
188 Zone Australia/Lord_Howe 10:36:20 - LMT 1895 Feb
192 # Australian miscellany
194 # Ashmore Is, Cartier
195 # no indigenous inhabitants; only seasonal caretakers
196 # like Australia/Perth, says Turner
199 # no indigenous inhabitants; only meteorologists
203 # permanent occupation (scientific station) since 1948;
204 # sealing and penguin oil station operated 1888/1917
205 # like Australia/Hobart, says Turner
208 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
209 Zone Indian/Christmas 7:02:52 - LMT 1895 Feb
210 7:00 - CXT # Christmas Island Time
214 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
215 Rule Cook 1978 only - Nov 12 0:00 0:30 HS
216 Rule Cook 1979 1991 - Mar Sun>=1 0:00 0 -
217 Rule Cook 1979 1990 - Oct lastSun 0:00 0:30 HS
218 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
219 Zone Pacific/Rarotonga -10:39:04 - LMT 1901 # Avarua
220 -10:30 - CKT 1978 Nov 12 # Cook Is Time
224 # These islands were ruled by the Ross family from about 1830 to 1978.
225 # We don't know when standard time was introduced; for now, we guess 1900.
226 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
227 Zone Indian/Cocos 6:27:40 - LMT 1900
228 6:30 - CCT # Cocos Islands Time
231 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
232 Rule Fiji 1998 1999 - Nov Sun>=1 2:00 1:00 S
233 Rule Fiji 1999 2000 - Feb lastSun 3:00 0 -
234 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
235 Zone Pacific/Fiji 11:53:40 - LMT 1915 Oct 26 # Suva
236 12:00 Fiji FJ%sT # Fiji Time
239 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
240 Zone Pacific/Gambier -8:59:48 - LMT 1912 Oct # Rikitea
241 -9:00 - GAMT # Gambier Time
242 Zone Pacific/Marquesas -9:18:00 - LMT 1912 Oct
243 -9:30 - MART # Marquesas Time
244 Zone Pacific/Tahiti -9:58:16 - LMT 1912 Oct # Papeete
245 -10:00 - TAHT # Tahiti Time
246 # Clipperton (near North America) is administered from French Polynesia;
250 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
251 Zone Pacific/Guam -14:21:00 - LMT 1844 Dec 31
252 9:39:00 - LMT 1901 # Agana
253 10:00 - GST 2000 Dec 23 # Guam
254 10:00 - ChST # Chamorro Standard Time
257 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
258 Zone Pacific/Tarawa 11:32:04 - LMT 1901 # Bairiki
259 12:00 - GILT # Gilbert Is Time
260 Zone Pacific/Enderbury -11:24:20 - LMT 1901
261 -12:00 - PHOT 1979 Oct # Phoenix Is Time
264 Zone Pacific/Kiritimati -10:29:20 - LMT 1901
265 -10:40 - LINT 1979 Oct # Line Is Time
270 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
271 Zone Pacific/Saipan -14:17:00 - LMT 1844 Dec 31
273 9:00 - MPT 1969 Oct # N Mariana Is Time
274 10:00 - MPT 2000 Dec 23
275 10:00 - ChST # Chamorro Standard Time
278 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
279 Zone Pacific/Majuro 11:24:48 - LMT 1901
280 11:00 - MHT 1969 Oct # Marshall Islands Time
282 Zone Pacific/Kwajalein 11:09:20 - LMT 1901
284 -12:00 - KWAT 1993 Aug 20 # Kwajalein Time
288 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
289 Zone Pacific/Truk 10:07:08 - LMT 1901
290 10:00 - TRUT # Truk Time
291 Zone Pacific/Ponape 10:32:52 - LMT 1901 # Kolonia
292 11:00 - PONT # Ponape Time
293 Zone Pacific/Kosrae 10:51:56 - LMT 1901
294 11:00 - KOST 1969 Oct # Kosrae Time
299 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
300 Zone Pacific/Nauru 11:07:40 - LMT 1921 Jan 15 # Uaobe
301 11:30 - NRT 1942 Mar 15 # Nauru Time
302 9:00 - JST 1944 Aug 15
307 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
308 Rule NC 1977 1978 - Dec Sun>=1 0:00 1:00 S
309 Rule NC 1978 1979 - Feb 27 0:00 0 -
310 Rule NC 1996 only - Dec 1 2:00s 1:00 S
311 # Shanks says the following was at 2:00; go with IATA.
312 Rule NC 1997 only - Mar 2 2:00s 0 -
313 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
314 Zone Pacific/Noumea 11:05:48 - LMT 1912 Jan 13
318 ###############################################################################
322 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
323 Rule NZ 1927 only - Nov 6 2:00 1:00 S
324 Rule NZ 1928 only - Mar 4 2:00 0 M
325 Rule NZ 1928 1933 - Oct Sun>=8 2:00 0:30 S
326 Rule NZ 1929 1933 - Mar Sun>=15 2:00 0 M
327 Rule NZ 1934 1940 - Apr lastSun 2:00 0 M
328 Rule NZ 1934 1940 - Sep lastSun 2:00 0:30 S
329 Rule NZ 1946 only - Jan 1 0:00 0 S
330 # Since 1957 Chatham has been 45 minutes ahead of NZ, but there's no
331 # convenient notation for this so we must duplicate the Rule lines.
332 Rule NZ 1974 only - Nov Sun>=1 2:00s 1:00 D
333 Rule Chatham 1974 only - Nov Sun>=1 2:45s 1:00 D
334 Rule NZ 1975 only - Feb lastSun 2:00s 0 S
335 Rule Chatham 1975 only - Feb lastSun 2:45s 0 S
336 Rule NZ 1975 1988 - Oct lastSun 2:00s 1:00 D
337 Rule Chatham 1975 1988 - Oct lastSun 2:45s 1:00 D
338 Rule NZ 1976 1989 - Mar Sun>=1 2:00s 0 S
339 Rule Chatham 1976 1989 - Mar Sun>=1 2:45s 0 S
340 Rule NZ 1989 only - Oct Sun>=8 2:00s 1:00 D
341 Rule Chatham 1989 only - Oct Sun>=8 2:45s 1:00 D
342 Rule NZ 1990 max - Oct Sun>=1 2:00s 1:00 D
343 Rule Chatham 1990 max - Oct Sun>=1 2:45s 1:00 D
344 Rule NZ 1990 max - Mar Sun>=15 2:00s 0 S
345 Rule Chatham 1990 max - Mar Sun>=15 2:45s 0 S
346 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
347 Zone Pacific/Auckland 11:39:04 - LMT 1868 Nov 2
348 11:30 NZ NZ%sT 1946 Jan 1
350 Zone Pacific/Chatham 12:13:48 - LMT 1957 Jan 1
355 # uninhabited; Maori and Moriori, colonial settlers, pastoralists, sealers,
356 # and scientific personnel have wintered
359 # minor whaling stations operated 1909/1914
360 # scientific station operated 1941/1995;
361 # previously whalers, sealers, pastoralists, and scientific personnel wintered
362 # was probably like Pacific/Auckland
364 ###############################################################################
368 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
369 Zone Pacific/Niue -11:19:40 - LMT 1901 # Alofi
370 -11:20 - NUT 1951 # Niue Time
371 -11:30 - NUT 1978 Oct 1
375 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
376 Zone Pacific/Norfolk 11:11:52 - LMT 1901 # Kingston
377 11:12 - NMT 1951 # Norfolk Mean Time
378 11:30 - NFT # Norfolk Time
381 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
382 Zone Pacific/Palau 8:57:56 - LMT 1901 # Koror
383 9:00 - PWT # Palau Time
386 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
387 Zone Pacific/Port_Moresby 9:48:40 - LMT 1880
388 9:48:32 - PMMT 1895 # Port Moresby Mean Time
389 10:00 - PGT # Papua New Guinea Time
392 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
393 Zone Pacific/Pitcairn -8:40:20 - LMT 1901 # Adamstown
394 -8:30 - PNT 1998 Apr 27 00:00
395 -8:00 - PST # Pitcairn Standard Time
398 Zone Pacific/Pago_Pago 12:37:12 - LMT 1879 Jul 5
400 -11:30 - SAMT 1950 # Samoa Time
401 -11:00 - NST 1967 Apr # N=Nome
402 -11:00 - BST 1983 Nov 30 # B=Bering
403 -11:00 - SST # S=Samoa
406 Zone Pacific/Apia 12:33:04 - LMT 1879 Jul 5
408 -11:30 - SAMT 1950 # Samoa Time
409 -11:00 - WST # Samoa Time
412 # excludes Bougainville, for which see Papua New Guinea
413 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
414 Zone Pacific/Guadalcanal 10:39:48 - LMT 1912 Oct # Honiara
415 11:00 - SBT # Solomon Is Time
418 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
419 Zone Pacific/Fakaofo -11:24:56 - LMT 1901
420 -10:00 - TKT # Tokelau Time
423 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
424 Rule Tonga 1999 only - Oct 7 2:00s 1:00 S
425 Rule Tonga 2000 only - Mar 19 2:00s 0 -
426 Rule Tonga 2000 2001 - Nov Sun>=1 2:00 1:00 S
427 Rule Tonga 2001 2002 - Jan lastSun 2:00 0 -
428 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
429 Zone Pacific/Tongatapu 12:19:20 - LMT 1901
430 12:20 - TOT 1941 # Tonga Time
435 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
436 Zone Pacific/Funafuti 11:56:52 - LMT 1901
437 12:00 - TVT # Tuvalu Time
440 # US minor outlying islands
443 # uninhabited since World War II
444 # no information; was probably like Pacific/Pago_Pago
447 # uninhabited since 1958
448 # no information; was probably like Pacific/Kiritimati
451 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
452 Zone Pacific/Johnston -10:00 - HST
459 # From Mark Brader (2005-01-23):
460 # [Fallacies and Fantasies of Air Transport History, by R.E.G. Davies,
461 # published 1994 by Paladwr Press, McLean, VA, USA; ISBN 0-9626483-5-3]
462 # reproduced a Pan American Airways timeables from 1936, for their weekly
463 # "Orient Express" flights between San Francisco and Manila, and connecting
464 # flights to Chicago and the US East Coast. As it uses some time zone
465 # designations that I've never seen before:....
466 # Fri. 6:30A Lv. HONOLOLU (Pearl Harbor), H.I. H.L.T. Ar. 5:30P Sun.
467 # " 3:00P Ar. MIDWAY ISLAND . . . . . . . . . M.L.T. Lv. 6:00A "
469 Zone Pacific/Midway -11:49:28 - LMT 1901
470 -11:00 - NST 1956 Jun 3
471 -11:00 1:00 NDT 1956 Sep 2
472 -11:00 - NST 1967 Apr # N=Nome
473 -11:00 - BST 1983 Nov 30 # B=Bering
474 -11:00 - SST # S=Samoa
477 # uninhabited since World War II; was probably like Pacific/Kiritimati
480 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
481 Zone Pacific/Wake 11:06:28 - LMT 1901
482 12:00 - WAKT # Wake Time
486 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
487 Rule Vanuatu 1983 only - Sep 25 0:00 1:00 S
488 Rule Vanuatu 1984 1991 - Mar Sun>=23 0:00 0 -
489 Rule Vanuatu 1984 only - Oct 23 0:00 1:00 S
490 Rule Vanuatu 1985 1991 - Sep Sun>=23 0:00 1:00 S
491 Rule Vanuatu 1992 1993 - Jan Sun>=23 0:00 0 -
492 Rule Vanuatu 1992 only - Oct Sun>=23 0:00 1:00 S
493 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
494 Zone Pacific/Efate 11:13:16 - LMT 1912 Jan 13 # Vila
495 11:00 Vanuatu VU%sT # Vanuatu Time
498 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
499 Zone Pacific/Wallis 12:15:20 - LMT 1901
500 12:00 - WFT # Wallis & Futuna Time
502 ###############################################################################
506 # This data is by no means authoritative; if you think you know better,
507 # go ahead and edit the file (and please send any changes to
508 # tz@elsie.nci.nih.gov for general use in the future).
510 # From Paul Eggert (1999-10-29):
511 # A good source for time zone historical data outside the U.S. is
512 # Thomas G. Shanks, The International Atlas (5th edition),
513 # San Diego: ACS Publications, Inc. (1999).
515 # Gwillim Law writes that a good source
516 # for recent time zone data is the International Air Transport
517 # Association's Standard Schedules Information Manual (IATA SSIM),
518 # published semiannually. Law sent in several helpful summaries
519 # of the IATA's data after 1990.
521 # Except where otherwise noted, Shanks is the source for entries through 1990,
522 # and IATA SSIM is the source for entries after 1990.
524 # Another source occasionally used is Edward W. Whitman, World Time Differences,
525 # Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), which
526 # I found in the UCLA library.
528 # A reliable and entertaining source about time zones is
529 # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
531 # I invented the abbreviations marked `*' in the following table;
532 # the rest are from earlier versions of this file, or from other sources.
533 # Corrections are welcome!
535 # LMT Local Mean Time
536 # 8:00 WST WST Western Australia
538 # 9:30 CST CST Central Australia
539 # 10:00 EST EST Eastern Australia
540 # 10:00 ChST Chamorro
541 # 10:30 LHST LHST Lord Howe*
542 # 11:30 NZMT NZST New Zealand through 1945
543 # 12:00 NZST NZDT New Zealand 1946-present
544 # 12:45 CHAST CHADT Chatham*
547 # - 8:00 PST Pitcairn*
549 # See the `northamerica' file for Hawaii.
550 # See the `southamerica' file for Easter I and the Galapagos Is.
552 ###############################################################################
556 # From Paul Eggert (2005-12-08):
557 # <a href="http://www.bom.gov.au/climate/averages/tables/dst_times.shtml">
558 # Implementation Dates of Daylight Saving Time within Australia
559 # </a> summarizes daylight saving issues in Australia.
561 # From Arthur David Olson (2005-12-12):
562 # <a href="http://www.lawlink.nsw.gov.au/lawlink/Corporate/ll_agdinfo.nsf/pages/community_relations_daylight_saving">
563 # Lawlink NSW:Daylight Saving in New South Wales
564 # </a> covers New South Wales in particular.
566 # From John Mackin (1991-03-06):
567 # We in Australia have _never_ referred to DST as `daylight' time.
568 # It is called `summer' time. Now by a happy coincidence, `summer'
569 # and `standard' happen to start with the same letter; hence, the
570 # abbreviation does _not_ change...
571 # The legislation does not actually define abbreviations, at least
572 # in this State, but the abbreviation is just commonly taken to be the
573 # initials of the phrase, and the legislation here uniformly uses
574 # the phrase `summer time' and does not use the phrase `daylight
576 # Announcers on the Commonwealth radio network, the ABC (for Australian
577 # Broadcasting Commission), use the phrases `Eastern Standard Time'
578 # or `Eastern Summer Time'. (Note, though, that as I say in the
579 # current australasia file, there is really no such thing.) Announcers
580 # on its overseas service, Radio Australia, use the same phrases
581 # prefixed by the word `Australian' when referring to local times;
582 # time announcements on that service, naturally enough, are made in UTC.
584 # From Arthur David Olson (1992-03-08):
585 # Given the above, what's chosen for year-round use is:
586 # CST for any place operating at a GMTOFF of 9:30
587 # WST for any place operating at a GMTOFF of 8:00
588 # EST for any place operating at a GMTOFF of 10:00
590 # From Paul Eggert (2001-04-05), summarizing a long discussion about "EST"
591 # versus "AEST" etc.:
593 # I see the following points of dispute:
595 # * How important are unique time zone abbreviations?
597 # Here I tend to agree with the point (most recently made by Chris
598 # Newman) that unique abbreviations should not be essential for proper
599 # operation of software. We have other instances of ambiguity
600 # (e.g. "IST" denoting both "Israel Standard Time" and "Indian
601 # Standard Time"), and they are not likely to go away any time soon.
602 # In the old days, some software mistakenly relied on unique
603 # abbreviations, but this is becoming less true with time, and I don't
604 # think it's that important to cater to such software these days.
606 # On the other hand, there is another motivation for unambiguous
607 # abbreviations: it cuts down on human confusion. This is
608 # particularly true for Australia, where "EST" can mean one thing for
609 # time T and a different thing for time T plus 1 second.
611 # * Does the relevant legislation indicate which abbreviations should be used?
613 # Here I tend to think that things are a mess, just as they are in
614 # many other countries. We Americans are currently disagreeing about
615 # which abbreviation to use for the newly legislated Chamorro Standard
618 # Personally, I would prefer to use common practice; I would like to
619 # refer to legislation only for examples of common practice, or as a
622 # * Do Australians more often use "Eastern Daylight Time" or "Eastern
623 # Summer Time"? Do they typically prefix the time zone names with
624 # the word "Australian"?
626 # My own impression is that both "Daylight Time" and "Summer Time" are
627 # common and are widely understood, but that "Summer Time" is more
628 # popular; and that the leading "A" is also common but is omitted more
629 # often than not. I just used AltaVista advanced search and got the
630 # following count of page hits:
632 # 1,103 "Eastern Summer Time" AND domain:au
633 # 971 "Australian Eastern Summer Time" AND domain:au
634 # 613 "Eastern Daylight Time" AND domain:au
635 # 127 "Australian Eastern Daylight Time" AND domain:au
637 # Here "Summer" seems quite a bit more popular than "Daylight",
638 # particularly when we know the time zone is Australian and not US,
639 # say. The "Australian" prefix seems to be popular for Eastern Summer
640 # Time, but unpopular for Eastern Daylight Time.
642 # For abbreviations, tools like AltaVista are less useful because of
643 # ambiguity. Many hits are not really time zones, unfortunately, and
644 # many hits denote US time zones and not Australian ones. But here
645 # are the hit counts anyway:
647 # 161,304 "EST" and domain:au
648 # 25,156 "EDT" and domain:au
649 # 18,263 "AEST" and domain:au
650 # 10,416 "AEDT" and domain:au
652 # 14,538 "CST" and domain:au
653 # 5,728 "CDT" and domain:au
654 # 176 "ACST" and domain:au
655 # 29 "ACDT" and domain:au
657 # 7,539 "WST" and domain:au
658 # 68 "AWST" and domain:au
660 # This data suggest that Australians tend to omit the "A" prefix in
661 # practice. The situation for "ST" versus "DT" is less clear, given
662 # the ambiguities involved.
664 # * How do Australians feel about the abbreviations in the tz database?
666 # If you just count Australians on this list, I count 2 in favor and 3
667 # against. One of the "against" votes (David Keegel) counseled delay,
668 # saying that both AEST/AEDT and EST/EST are widely used and
669 # understood in Australia.
671 # From Paul Eggert (1995-12-19):
672 # Shanks reports 2:00 for all autumn changes in Australia and New Zealand.
673 # Mark Prior writes that his newspaper
674 # reports that NSW's fall 1995 change will occur at 2:00,
675 # but Robert Elz says it's been 3:00 in Victoria since 1970
676 # and perhaps the newspaper's `2:00' is referring to standard time.
677 # For now we'll continue to assume 2:00s for changes since 1960.
679 # From Eric Ulevik (1998-01-05):
681 # Here are some URLs to Australian time legislation. These URLs are stable,
682 # and should probably be included in the data file. There are probably more
683 # relevant entries in this database.
685 # NSW (including LHI and Broken Hill):
686 # <a href="http://www.austlii.edu.au/au/legis/nsw/consol_act/sta1987137/index.html">
687 # Standard Time Act 1987 (updated 1995-04-04)
690 # <a href="http://www.austlii.edu.au/au/legis/act/consol_act/stasta1972279/index.html">
691 # Standard Time and Summer Time Act 1972
694 # <a href="http://www.austlii.edu.au/au/legis/sa/consol_act/sta1898137/index.html">
695 # Standard Time Act, 1898
698 # From David Grosz (2005-06-13):
699 # It was announced last week that Daylight Saving would be extended by
700 # one week next year to allow for the 2006 Commonwealth Games.
701 # Daylight Saving is now to end for next year only on the first Sunday
702 # in April instead of the last Sunday in March.
704 # From Gwillim Law (2005-06-14):
705 # I did some Googling and found that all of those states (and territory) plan
706 # to extend DST together in 2006.
707 # ACT: http://www.cmd.act.gov.au/mediareleases/fileread.cfm?file=86.txt
708 # New South Wales: http://www.thecouriermail.news.com.au/common/story_page/0,5936,15538869%255E1702,00.html
709 # South Australia: http://www.news.com.au/story/0,10117,15555031-1246,00.html
710 # Tasmania: http://www.media.tas.gov.au/release.php?id=14772
711 # Victoria: I wasn't able to find anything separate, but the other articles
714 # http://www.news.com.au/story/0,10117,15564030-1248,00.html.
718 # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
719 # # The NORTHERN TERRITORY.. [ Courtesy N.T. Dept of the Chief Minister ]
721 # # N.T. have never utilised any DST due to sub-tropical/tropical location.
723 # Zone Australia/North 9:30 - CST
725 # From Bradley White (1991-03-04):
726 # A recent excerpt from an Australian newspaper...
727 # the Northern Territory do[es] not have daylight saving.
731 # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
732 # # The state of WESTERN AUSTRALIA.. [ Courtesy W.A. dept Premier+Cabinet ]
734 # # W.A. suffers from a great deal of public and political opposition to
735 # # DST in principle. A bill is brought before parliament in most years, but
736 # # usually defeated either in the upper house, or in party caucus
737 # # before reaching parliament.
739 # Zone Australia/West 8:00 AW %sST
741 # Rule AW 1974 only - Oct lastSun 2:00 1:00 D
742 # Rule AW 1975 only - Mar Sun>=1 3:00 0 W
743 # Rule AW 1983 only - Oct lastSun 2:00 1:00 D
744 # Rule AW 1984 only - Mar Sun>=1 3:00 0 W
746 # From Bradley White (1991-03-04):
747 # A recent excerpt from an Australian newspaper...
748 # Western Australia...do[es] not have daylight saving.
750 # From John D. Newman via Bradley White (1991-11-02):
751 # Western Australia is still on "winter time". Some DH in Sydney
752 # rang me at home a few days ago at 6.00am. (He had just arrived at
754 # W.A. is switching to Summer Time on Nov 17th just to confuse
757 # From Arthur David Olson (1992-03-08):
758 # The 1992 ending date used in the rules is a best guess;
759 # it matches what was used in the past.
761 # <a href="http://www.bom.gov.au/faq/faqgen.htm">
762 # The Australian Bureau of Meteorology FAQ
763 # </a> (1999-09-27) writes that Giles Meteorological Station uses
764 # South Australian time even though it's located in Western Australia.
767 # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
768 # # The state of QUEENSLAND.. [ Courtesy Qld. Dept Premier Econ&Trade Devel ]
771 # Zone Australia/Queensland 10:00 AQ %sST
773 # Rule AQ 1971 only - Oct lastSun 2:00 1:00 D
774 # Rule AQ 1972 only - Feb lastSun 3:00 0 E
775 # Rule AQ 1989 max - Oct lastSun 2:00 1:00 D
776 # Rule AQ 1990 max - Mar Sun>=1 3:00 0 E
778 # From Bradley White (1989-12-24):
779 # "Australia/Queensland" now observes daylight time (i.e. from
782 # From Bradley White (1991-03-04):
783 # A recent excerpt from an Australian newspaper...
784 # ...Queensland...[has] agreed to end daylight saving
785 # at 3am tomorrow (March 3)...
787 # From John Mackin (1991-03-06):
788 # I can certainly confirm for my part that Daylight Saving in NSW did in fact
789 # end on Sunday, 3 March. I don't know at what hour, though. (It surprised
792 # From Bradley White (1992-03-08):
793 # ...there was recently a referendum in Queensland which resulted
794 # in the experimental daylight saving system being abandoned. So, ...
796 # Rule QLD 1989 1991 - Oct lastSun 2:00 1:00 D
797 # Rule QLD 1990 1992 - Mar Sun>=1 3:00 0 S
800 # From Arthur David Olson (1992-03-08):
801 # The chosen rules the union of the 1971/1972 change and the 1989-1992 changes.
803 # From Rives McDow (2002-04-09):
804 # The most interesting region I have found consists of three towns on the
805 # southern coast of Australia, population 10 at last report, along with
806 # 50,000 sheep, about 100 kilometers long and 40 kilometers into the
807 # continent. The primary town is Madura, with the other towns being
808 # Mundrabilla and Eucla. According to the sheriff of Madura, the
809 # residents got tired of having to change the time so often, as they are
810 # located in a strip overlapping the border of South Australia and Western
811 # Australia. South Australia observes daylight saving time; Western
812 # Australia does not. The two states are one and a half hours apart. The
813 # residents decided to forget about this nonsense of changing the clock so
814 # much and set the local time 20 hours and 45 minutes from the
815 # international date line, or right in the middle of the time of South
816 # Australia and Western Australia. As it only affects about 10 people and
817 # tourists staying at the Madura Motel, it has never really made as big an
818 # impact as Broken Hill. However, as tourist visiting there or anyone
819 # calling the local sheriff will attest, they do keep time in this way.
821 # From Paul Eggert (2002-04-09):
822 # This is confirmed by the section entitled
823 # "What's the deal with time zones???" in
824 # <http://www.earthsci.unimelb.edu.au/~awatkins/null.html>,
825 # which says a few other things:
827 # * Border Village, SA also is 45 minutes ahead of Perth.
828 # * The locals call this time zone "central W.A. Time" (presumably "CWAT").
829 # * The locals also call Western Australia time "Perth time".
831 # It's not clear from context whether everyone in Western Australia
832 # knows of this naming convention, or whether it's just the people in
835 # South Australia, Tasmania, Victoria
837 # From Arthur David Olson (1992-03-08):
838 # The rules from version 7.1 follow.
839 # There are lots of differences between these rules and
840 # the Shepherd et al. rules. Since the Shepherd et al. rules
841 # and Bradley White's newspaper article are in agreement on
842 # current DST ending dates, no worries.
844 # Rule Oz 1971 1985 - Oct lastSun 2:00 1:00 -
845 # Rule Oz 1986 max - Oct Sun<=24 2:00 1:00 -
846 # Rule Oz 1972 only - Feb 27 3:00 0 -
847 # Rule Oz 1973 1986 - Mar Sun>=1 3:00 0 -
848 # Rule Oz 1987 max - Mar Sun<=21 3:00 0 -
849 # Zone Australia/Tasmania 10:00 Oz EST
850 # Zone Australia/South 9:30 Oz CST
851 # Zone Australia/Victoria 10:00 Oz EST 1985 Oct lastSun 2:00
852 # 10:00 1:00 EST 1986 Mar Sun<=21 3:00
855 # From Robert Elz (1991-03-06):
856 # I believe that the current start date for DST is "lastSun" in Oct...
857 # that changed Oct 89. That is, we're back to the
858 # original rule, and that rule currently applies in all the states
859 # that have dst, incl Qld. (Certainly it was true in Vic).
860 # The file I'm including says that happened in 1988, I think
861 # that's incorrect, but I'm not 100% certain.
865 # From Bradley White (1991-03-04):
866 # A recent excerpt from an Australian newspaper...
867 # ...South Australia...[has] agreed to end daylight saving
868 # at 3am tomorrow (March 3)...
870 # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
871 # # The state of SOUTH AUSTRALIA....[ Courtesy of S.A. Dept of Labour ]
874 # Zone Australia/South 9:30 AS %sST
876 # Rule AS 1971 max - Oct lastSun 2:00 1:00 D
877 # Rule AS 1972 1985 - Mar Sun>=1 3:00 0 C
878 # Rule AS 1986 1990 - Mar Sun<=21 3:00 0 C
879 # Rule AS 1991 max - Mar Sun>=1 3:00 0 C
881 # From Bradley White (1992-03-11):
882 # Recent correspondence with a friend in Adelaide
883 # contained the following exchange: "Due to the Adelaide Festival,
884 # South Australia delays setting back our clocks for a few weeks."
886 # From Robert Elz (1992-03-13):
887 # I heard that apparently (or at least, it appears that)
888 # South Aus will have an extra 3 weeks daylight saving every even
889 # numbered year (from 1990). That's when the Adelaide Festival
892 # From Robert Elz (1992-03-16, 00:57:07 +1000):
893 # DST didn't end in Adelaide today (yesterday)....
894 # But whether it's "4th Sunday" or "2nd last Sunday" I have no idea whatever...
895 # (it's just as likely to be "the Sunday we pick for this year"...).
897 # From Bradley White (1994-04-11):
898 # If Sun, 15 March, 1992 was at +1030 as kre asserts, but yet Sun, 20 March,
899 # 1994 was at +0930 as John Connolly's customer seems to assert, then I can
900 # only conclude that the actual rule is more complicated....
902 # From John Warburton (1994-10-07):
903 # The new Daylight Savings dates for South Australia ...
904 # was gazetted in the Government Hansard on Sep 26 1994....
905 # start on last Sunday in October and end in last sunday in March.
909 # The rules for 1967 through 1991 were reported by George Shepherd
910 # via Simon Woodhead via Robert Elz (1991-03-06):
911 # # The state of TASMANIA.. [Courtesy Tasmanian Dept of Premier + Cabinet ]
914 # From Bill Hart via Guy Harris (1991-10-10):
915 # Oh yes, the new daylight savings rules are uniquely tasmanian, we have
916 # 6 weeks a year now when we are out of sync with the rest of Australia
917 # (but nothing new about that).
919 # From Alex Livingston (1999-10-04):
920 # I heard on the ABC (Australian Broadcasting Corporation) radio news on the
921 # (long) weekend that Tasmania, which usually goes its own way in this regard,
922 # has decided to join with most of NSW, the ACT, and most of Victoria
923 # (Australia) and start daylight saving on the last Sunday in August in 2000
924 # instead of the first Sunday in October.
926 # Sim Alam (2000-07-03) reported a legal citation for the 2000/2001 rules:
927 # http://www.thelaw.tas.gov.au/fragview/42++1968+GS3A@EN+2000070300
931 # The rules for 1971 through 1991 were reported by George Shepherd
932 # via Simon Woodhead via Robert Elz (1991-03-06):
933 # # The state of VICTORIA.. [ Courtesy of Vic. Dept of Premier + Cabinet ]
936 # From Scott Harrington (2001-08-29):
937 # On KQED's "City Arts and Lectures" program last night I heard an
938 # interesting story about daylight savings time. Dr. John Heilbron was
939 # discussing his book "The Sun in the Church: Cathedrals as Solar
940 # Observatories"[1], and in particular the Shrine of Remembrance[2] located
941 # in Melbourne, Australia.
943 # Apparently the shrine's main purpose is a beam of sunlight which
944 # illuminates a special spot on the floor at the 11th hour of the 11th day
945 # of the 11th month (Remembrance Day) every year in memory of Australia's
946 # fallen WWI soldiers. And if you go there on Nov. 11, at 11am local time,
947 # you will indeed see the sunbeam illuminate the special spot at the
950 # However, that is only because of some special mirror contraption that had
951 # to be employed, since due to daylight savings time, the true solar time of
952 # the remembrance moment occurs one hour later (or earlier?). Perhaps
953 # someone with more information on this jury-rig can tell us more.
955 # [1] http://www.hup.harvard.edu/catalog/HEISUN.html
956 # [2] http://www.shrine.org.au
960 # From Arthur David Olson:
961 # New South Wales and subjurisdictions have their own ideas of a fun time.
962 # Based on law library research by John Mackin,
964 # In Australia, time is not legislated federally, but rather by the
965 # individual states. Thus, while such terms as ``Eastern Standard Time''
966 # [I mean, of course, Australian EST, not any other kind] are in common
967 # use, _they have NO REAL MEANING_, as they are not defined in the
968 # legislation. This is very important to understand.
969 # I have researched New South Wales time only...
971 # From Eric Ulevik (1999-05-26):
972 # DST will start in NSW on the last Sunday of August, rather than the usual
973 # October in 2000. [See: Matthew Moore,
974 # <a href="http://www.smh.com.au/news/9905/26/pageone/pageone4.html">
975 # Two months more daylight saving
977 # Sydney Morning Herald (1999-05-26).]
979 # From Paul Eggert (1999-09-27):
980 # See the following official NSW source:
981 # <a href="http://dir.gis.nsw.gov.au/cgi-bin/genobject/document/other/daylightsaving/tigGmZ">
982 # Daylight Saving in New South Wales.
985 # Narrabri Shire (NSW) council has announced it will ignore the extension of
986 # daylight saving next year. See:
987 # <a href="http://abc.net.au/news/regionals/neweng/monthly/regeng-22jul1999-1.htm">
988 # Narrabri Council to ignore daylight saving
989 # </a> (1999-07-22). For now, we'll wait to see if this really happens.
991 # Victoria will following NSW. See:
992 # <a href="http://abc.net.au/local/news/olympics/1999/07/item19990728112314_1.htm">
993 # Vic to extend daylight saving
996 # However, South Australia rejected the DST request. See:
997 # <a href="http://abc.net.au/news/olympics/1999/07/item19990719151754_1.htm">
998 # South Australia rejects Olympics daylight savings request
1001 # Queensland also will not observe DST for the Olympics. See:
1002 # <a href="http://abc.net.au/news/olympics/1999/06/item19990601114608_1.htm">
1003 # Qld says no to daylight savings for Olympics
1004 # </a> (1999-06-01), which quotes Queensland Premier Peter Beattie as saying
1005 # ``Look you've got to remember in my family when this came up last time
1006 # I voted for it, my wife voted against it and she said to me it's all very
1007 # well for you, you don't have to worry about getting the children out of
1008 # bed, getting them to school, getting them to sleep at night.
1009 # I've been through all this argument domestically...my wife rules.''
1011 # Broken Hill will stick with South Australian time in 2000. See:
1012 # <a href="http://abc.net.au/news/regionals/brokenh/monthly/regbrok-21jul1999-6.htm">
1013 # Broken Hill to be behind the times
1014 # </a> (1999-07-21).
1016 # IATA SSIM (1998-09) says that the spring 2000 change for Australian
1017 # Capital Territory, New South Wales except Lord Howe Island and Broken
1018 # Hill, and Victoria will be August 27, presumably due to the Sydney Olympics.
1020 # From Eric Ulevik, referring to Sydney's Sun Herald (2000-08-13), page 29:
1021 # The Queensland Premier Peter Beattie is encouraging northern NSW
1022 # towns to use Queensland time.
1026 # From John Mackin (1989-01-04):
1027 # `Broken Hill' means the County of Yancowinna.
1029 # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
1030 # # YANCOWINNA.. [ Confirmation courtesy of Broken Hill Postmaster ]
1033 # # Yancowinna uses Central Standard Time, despite [its] location on the
1034 # # New South Wales side of the S.A. border. Most business and social dealings
1035 # # are with CST zones, therefore CST is legislated by local government
1036 # # although the switch to Summer Time occurs in line with N.S.W. There have
1037 # # been years when this did not apply, but the historical data is not
1038 # # presently available.
1039 # Zone Australia/Yancowinna 9:30 AY %sST
1041 # Rule AY 1971 1985 - Oct lastSun 2:00 1:00 D
1042 # Rule AY 1972 only - Feb lastSun 3:00 0 C
1043 # [followed by other Rules]
1047 # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
1048 # LHI... [ Courtesy of Pauline Van Winsen ]
1050 # Lord Howe Island is located off the New South Wales coast, and is half an
1051 # hour ahead of NSW time.
1053 # From James Lonergan, Secretary, Lord Howe Island Board (2000-01-27):
1054 # Lord Howe Island summer time in 2000/2001 will commence on the same
1055 # date as the rest of NSW (i.e. 2000-08-27). For your information the
1056 # Lord Howe Island Board (controlling authority for the Island) is
1057 # seeking the community's views on various options for summer time
1058 # arrangements on the Island, e.g. advance clocks by 1 full hour
1059 # instead of only 30 minutes. Dependant on the wishes of residents
1060 # the Board may approach the NSW government to change the existing
1061 # arrangements. The starting date for summer time on the Island will
1062 # however always coincide with the rest of NSW.
1064 # From James Lonergan, Secretary, Lord Howe Island Board (2000-10-25):
1065 # Lord Howe Island advances clocks by 30 minutes during DST in NSW and retards
1066 # clocks by 30 minutes when DST finishes. Since DST was most recently
1067 # introduced in NSW, the "changeover" time on the Island has been 02:00 as
1068 # shown on clocks on LHI. I guess this means that for 30 minutes at the start
1069 # of DST, LHI is actually 1 hour ahead of the rest of NSW.
1071 # From Paul Eggert (2001-02-09):
1072 # For Lord Howe dates we use Shanks through 1989, and Lonergan thereafter.
1073 # For times we use Lonergan.
1075 ###############################################################################
1079 # From Mark Davies (1990-10-03):
1080 # the 1989/90 year was a trial of an extended "daylight saving" period.
1081 # This trial was deemed successful and the extended period adopted for
1082 # subsequent years (with the addition of a further week at the start).
1083 # source -- phone call to Ministry of Internal Affairs Head Office.
1085 # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
1086 # # The Country of New Zealand (Australia's east island -) Gee they hate that!
1087 # # or is Australia the west island of N.Z.
1088 # # [ courtesy of Geoff Tribble.. Auckland N.Z. ]
1091 # Rule NZ 1974 1988 - Oct lastSun 2:00 1:00 D
1092 # Rule NZ 1989 max - Oct Sun>=1 2:00 1:00 D
1093 # Rule NZ 1975 1989 - Mar Sun>=1 3:00 0 S
1094 # Rule NZ 1990 max - Mar lastSun 3:00 0 S
1096 # Zone NZ 12:00 NZ NZ%sT # New Zealand
1097 # Zone NZ-CHAT 12:45 - NZ-CHAT # Chatham Island
1099 # From Arthur David Olson (1992-03-08):
1100 # The chosen rules use the Davies October 8 values for the start of DST in 1989
1101 # rather than the October 1 value.
1103 # From Paul Eggert (1995-12-19);
1104 # Shanks reports 2:00 for all autumn changes in Australia and New Zealand.
1105 # Robert Uzgalis writes that the New Zealand Daylight
1106 # Savings Time Order in Council dated 1990-06-18 specifies 2:00 standard
1107 # time on both the first Sunday in October and the third Sunday in March.
1108 # As with Australia, we'll assume the tradition is 2:00s, not 2:00.
1110 # From Paul Eggert (2003-05-26):
1111 # The Department of Internal Affairs (DIA) maintains a brief history,
1112 # as does Carol Squires; see tz-link.htm for the full references.
1113 # Use these sources in preference to Shanks.
1115 # For Chatham, IATA SSIM (1991/1999) gives the NZ rules but with
1116 # transitions at 2:45 local standard time; this confirms that Chatham
1117 # is always exactly 45 minutes ahead of Auckland.
1119 ###############################################################################
1124 # Howse writes (p 153) that in 1879 the British governor of Fiji
1125 # enacted an ordinance standardizing the islands on Antipodean Time
1126 # instead of the American system (which was one day behind).
1128 # From Rives McDow (1998-10-08):
1129 # Fiji will introduce DST effective 0200 local time, 1998-11-01
1130 # until 0300 local time 1999-02-28. Each year the DST period will
1131 # be from the first Sunday in November until the last Sunday in February.
1133 # From Paul Eggert (2000-01-08):
1134 # IATA SSIM (1999-09) says DST ends 0100 local time. Go with McDow.
1136 # From the BBC World Service (1998-10-31 11:32 UTC):
1137 # The Fijiian government says the main reasons for the time change is to
1138 # improve productivity and reduce road accidents. But correspondents say it
1139 # also hopes the move will boost Fiji's ability to compete with other pacific
1140 # islands in the effort to attract tourists to witness the dawning of the new
1143 # http://www.fiji.gov.fj/press/2000_09/2000_09_13-05.shtml (2000-09-13)
1144 # reports that Fiji has discontinued DST.
1148 # Johnston data is from usno1995.
1153 # From Paul Eggert (1996-01-22):
1154 # Today's _Wall Street Journal_ (page 1) reports that Kiribati
1155 # ``declared it the same day throught the country as of Jan. 1, 1995''
1156 # as part of the competition to be first into the 21st century.
1161 # In comp.risks 14.87 (26 August 1993), Peter Neumann writes:
1162 # I wonder what happened in Kwajalein, where there was NO Friday,
1163 # 1993-08-20. Thursday night at midnight Kwajalein switched sides with
1164 # respect to the International Date Line, to rejoin its fellow islands,
1165 # going from 11:59 p.m. Thursday to 12:00 m. Saturday in a blink.
1168 # N Mariana Is, Guam
1170 # Howse writes (p 153) ``The Spaniards, on the other hand, reached the
1171 # Philippines and the Ladrones from America,'' and implies that the Ladrones
1172 # (now called the Marianas) kept American date for quite some time.
1173 # For now, we assume the Ladrones switched at the same time as the Philippines;
1176 # US Public Law 106-564 (2000-12-23) made UTC+10 the official standard time,
1177 # under the name "Chamorro Standard Time". There is no official abbreviation,
1178 # but Congressman Robert A. Underwood, author of the bill that became law,
1179 # wrote in a press release (2000-12-27) that he will seek the use of "ChST".
1184 # Alan Eugene Davis writes (1996-03-16),
1185 # ``I am certain, having lived there for the past decade, that "Truk"
1186 # (now properly known as Chuuk) ... is in the time zone GMT+10.''
1188 # Shanks writes that Truk switched from UTC+10 to UTC+11 on 1978-10-01;
1189 # ignore this for now.
1191 # From Paul Eggert (1999-10-29):
1192 # The Federated States of Micronesia Visitors Board writes in
1193 # <a href="http://www.fsmgov.org/info/clocks.html">
1194 # The Federated States of Micronesia - Visitor Information
1196 # that Truk and Yap are UTC+10, and Ponape and Kosrae are UTC+11.
1197 # We don't know when Kosrae switched from UTC+12; assume January 1 for now.
1202 # From Charles T O'Connor, KMTH DJ (1956),
1203 # quoted in the KTMH section of the Radio Heritage Collection
1204 # <http://radiodx.com/spdxr/KMTH.htm> (2002-12-31):
1205 # For the past two months we've been on what is known as Daylight
1206 # Saving Time. This time has put us on air at 5am in the morning,
1207 # your time down there in New Zealand. Starting September 2, 1956
1208 # we'll again go back to Standard Time. This'll mean that we'll go to
1209 # air at 6am your time.
1211 # From Paul Eggert (2003-03-23):
1212 # We don't know the date of that quote, but we'll guess they
1213 # started DST on June 3. Possibly DST was observed other years
1214 # in Midway, but we have no record of it.
1219 # From Rives McDow (1999-11-08):
1220 # A Proclamation was signed by the Governor of Pitcairn on the 27th March 1998
1221 # with regard to Pitcairn Standard Time. The Proclamation is as follows.
1223 # The local time for general purposes in the Islands shall be
1224 # Co-ordinated Universal time minus 8 hours and shall be known
1225 # as Pitcairn Standard Time.
1227 # ... I have also seen Pitcairn listed as UTC minus 9 hours in several
1228 # references, and can only assume that this was an error in interpretation
1229 # somehow in light of this proclamation.
1231 # From Rives McDow (1999-11-09):
1232 # The Proclamation regarding Pitcairn time came into effect on 27 April 1998
1235 # From Howie Phelps (1999-11-10), who talked to a Pitcairner via shortwave:
1236 # Betty Christian told me yesterday that their local time is the same as
1237 # Pacific Standard Time. They used to be 1/2 hour different from us here in
1238 # Sacramento but it was changed a couple of years ago.
1243 # Howse writes (p 153, citing p 10 of the 1883-11-18 New York Herald)
1244 # that in 1879 the King of Samoa decided to change
1245 # ``the date in his kingdom from the Antipodean to the American system,
1246 # ordaining -- by a masterpiece of diplomatic flattery -- that
1247 # the Fourth of July should be celebrated twice in that year.''
1252 # From Paul Eggert (1996-01-22):
1253 # Today's _Wall Street Journal_ (p 1) reports that ``Tonga has been plotting
1254 # to sneak ahead of [New Zealanders] by introducing daylight-saving time.''
1255 # Since Kiribati has moved the Date Line it's not clear what Tonga will do.
1257 # Don Mundell writes in the 1997-02-20 Tonga Chronicle
1258 # <a href="http://www.tongatapu.net.to/tonga/homeland/timebegins.htm">
1259 # How Tonga became `The Land where Time Begins'
1262 # Until 1941 Tonga maintained a standard time 50 minutes ahead of NZST
1263 # 12 hours and 20 minutes ahead of GMT. When New Zealand adjusted its
1264 # standard time in 1940s, Tonga had the choice of subtracting from its
1265 # local time to come on the same standard time as New Zealand or of
1266 # advancing its time to maintain the differential of 13 degrees
1267 # (approximately 50 minutes ahead of New Zealand time).
1269 # Because His Majesty King Taufa'ahau Tupou IV, then Crown Prince
1270 # Tungi, preferred to ensure Tonga's title as the land where time
1271 # begins, the Legislative Assembly approved the latter change.
1273 # But some of the older, more conservative members from the outer
1274 # islands objected. "If at midnight on Dec. 31, we move ahead 40
1275 # minutes, as your Royal Highness wishes, what becomes of the 40
1276 # minutes we have lost?"
1278 # The Crown Prince, presented an unanswerable argument: "Remember that
1279 # on the World Day of Prayer, you would be the first people on Earth
1280 # to say your prayers in the morning."
1282 # From Paul Eggert (1999-08-12):
1283 # Shanks says the transition was on 1968-10-01; go with Mundell.
1285 # From Eric Ulevik (1999-05-03):
1286 # Tonga's director of tourism, who is also secretary of the National Millenium
1287 # Committee, has a plan to get Tonga back in front.
1288 # He has proposed a one-off move to tropical daylight saving for Tonga from
1289 # October to March, which has won approval in principle from the Tongan
1292 # From Steffen Thorsen (1999-09-09):
1293 # * Tonga will introduce DST in November
1295 # I was given this link by John Letts:
1296 # <a hef="http://news.bbc.co.uk/hi/english/world/asia-pacific/newsid_424000/424764.stm">
1297 # http://news.bbc.co.uk/hi/english/world/asia-pacific/newsid_424000/424764.stm
1300 # I have not been able to find exact dates for the transition in November
1301 # yet. By reading this article it seems like Fiji will be 14 hours ahead
1302 # of UTC as well, but as far as I know Fiji will only be 13 hours ahead
1303 # (12 + 1 hour DST).
1305 # From Arthur David Olson (1999-09-20):
1306 # According to <a href="http://www.tongaonline.com/news/sept1799.html>
1307 # http://www.tongaonline.com/news/sept1799.html
1309 # "Daylight Savings Time will take effect on Oct. 2 through April 15, 2000
1310 # and annually thereafter from the first Saturday in October through the
1311 # third Saturday of April. Under the system approved by Privy Council on
1312 # Sept. 10, clocks must be turned ahead one hour on the opening day and
1313 # set back an hour on the closing date."
1314 # Alas, no indication of the time of day.
1316 # From Rives McDow (1999-10-06):
1317 # Tonga started its Daylight Saving on Saturday morning October 2nd at 0200am.
1318 # Daylight Saving ends on April 16 at 0300am which is Sunday morning.
1320 # From Steffen Thorsen (2000-10-31):
1321 # Back in March I found a notice on the website http://www.tongaonline.com
1322 # that Tonga changed back to standard time one month early, on March 19
1323 # instead of the original reported date April 16. Unfortunately, the article
1324 # is no longer available on the site, and I did not make a copy of the
1325 # text, and I have forgotten to report it here.
1326 # (Original URL was: http://www.tongaonline.com/news/march162000.htm )
1328 # From Rives McDow (2000-12-01):
1329 # Tonga is observing DST as of 2000-11-04 and will stop on 2001-01-27.
1331 # From Sione Moala-Mafi (2001-09-20) via Rives McDow:
1332 # At 2:00am on the first Sunday of November, the standard time in the Kingdom
1333 # shall be moved forward by one hour to 3:00am. At 2:00am on the last Sunday
1334 # of January the standard time in the Kingdom shall be moved backward by one
1337 # From Pulu 'Anau (2002-11-05):
1338 # The law was for 3 years, supposedly to get renewed. It wasn't.
1343 # From Vernice Anderson, Personal Secretary to Philip Jessup,
1344 # US Ambassador At Large (oral history interview, 1971-02-02):
1346 # Saturday, the 14th [of October, 1950] -- ... The time was all the
1347 # more confusing at that point, because we had crossed the
1348 # International Date Line, thus getting two Sundays. Furthermore, we
1349 # discovered that Wake Island had two hours of daylight saving time
1350 # making calculation of time in Washington difficult if not almost
1353 # http://www.trumanlibrary.org/wake/meeting.htm
1355 # From Paul Eggert (2003-03-23):
1356 # We have no other report of DST in Wake Island, so omit this info for now.
1358 ###############################################################################
1360 # The International Date Line
1362 # From Gwillim Law (2000-01-03):
1364 # The International Date Line is not defined by any international standard,
1365 # convention, or treaty. Mapmakers are free to draw it as they please.
1366 # Reputable mapmakers will simply ensure that every point of land appears on
1367 # the correct side of the IDL, according to the date legally observed there.
1369 # When Kiribati adopted a uniform date in 1995, thereby moving the Phoenix and
1370 # Line Islands to the west side of the IDL (or, if you prefer, moving the IDL
1371 # to the east side of the Phoenix and Line Islands), I suppose that most
1372 # mapmakers redrew the IDL following the boundary of Kiribati. Even that line
1373 # has a rather arbitrary nature. The straight-line boundaries between Pacific
1374 # island nations that are shown on many maps are based on an international
1375 # convention, but are not legally binding national borders.... The date is
1376 # governed by the IDL; therefore, even on the high seas, there may be some
1377 # places as late as fourteen hours later than UTC. And, since the IDL is not
1378 # an international standard, there are some places on the high seas where the
1379 # correct date is ambiguous.
1381 # From Wikipedia <http://en.wikipedia.org/wiki/Time_zone> (2005-08-31):
1382 # Before 1920, all ships kept local apparent time on the high seas by setting
1383 # their clocks at night or at the morning sight so that, given the ship's
1384 # speed and direction, it would be 12 o'clock when the Sun crossed the ship's
1385 # meridian (12 o'clock = local apparent noon). During 1917, at the
1386 # Anglo-French Conference on Time-keeping at Sea, it was recommended that all
1387 # ships, both military and civilian, should adopt hourly standard time zones
1388 # on the high seas. Whenever a ship was within the territorial waters of any
1389 # nation it would use that nation's standard time. The captain was permitted
1390 # to change his ship's clocks at a time of his choice following his ship's
1391 # entry into another zone time--he often chose midnight. These zones were
1392 # adopted by all major fleets between 1920 and 1925 but not by many
1393 # independent merchant ships until World War II.
1395 # From Paul Eggert, using references suggested by Oscar van Vlijmen
1398 # The American Practical Navigator (2002)
1399 # <http://pollux.nss.nima.mil/pubs/pubs_j_apn_sections.html?rid=187>
1400 # talks only about the 180-degree meridian with respect to ships in
1401 # international waters; it ignores the international date line.
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