australasia revision 196582
1# <pre>
2# @(#)australasia	8.12
3# This file is in the public domain, so clarified as of
4# 2009-05-17 by Arthur David Olson.
5
6# This file also includes Pacific islands.
7
8# Notes are at the end of this file
9
10###############################################################################
11
12# Australia
13
14# Please see the notes below for the controversy about "EST" versus "AEST" etc.
15
16# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
17Rule	Aus	1917	only	-	Jan	 1	0:01	1:00	-
18Rule	Aus	1917	only	-	Mar	25	2:00	0	-
19Rule	Aus	1942	only	-	Jan	 1	2:00	1:00	-
20Rule	Aus	1942	only	-	Mar	29	2:00	0	-
21Rule	Aus	1942	only	-	Sep	27	2:00	1:00	-
22Rule	Aus	1943	1944	-	Mar	lastSun	2:00	0	-
23Rule	Aus	1943	only	-	Oct	 3	2:00	1:00	-
24# Go with Whitman and the Australian National Standards Commission, which
25# says W Australia didn't use DST in 1943/1944.  Ignore Whitman's claim that
26# 1944/1945 was just like 1943/1944.
27
28# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
29# Northern Territory
30Zone Australia/Darwin	 8:43:20 -	LMT	1895 Feb
31			 9:00	-	CST	1899 May
32			 9:30	Aus	CST
33# Western Australia
34#
35# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
36Rule	AW	1974	only	-	Oct	lastSun	2:00s	1:00	-
37Rule	AW	1975	only	-	Mar	Sun>=1	2:00s	0	-
38Rule	AW	1983	only	-	Oct	lastSun	2:00s	1:00	-
39Rule	AW	1984	only	-	Mar	Sun>=1	2:00s	0	-
40Rule	AW	1991	only	-	Nov	17	2:00s	1:00	-
41Rule	AW	1992	only	-	Mar	Sun>=1	2:00s	0	-
42Rule	AW	2006	only	-	Dec	 3	2:00s	1:00	-
43Rule	AW	2007	2009	-	Mar	lastSun	2:00s	0	-
44Rule	AW	2007	2008	-	Oct	lastSun	2:00s	1:00	-
45Zone Australia/Perth	 7:43:24 -	LMT	1895 Dec
46			 8:00	Aus	WST	1943 Jul
47			 8:00	AW	WST
48Zone Australia/Eucla	 8:35:28 -	LMT	1895 Dec
49			 8:45	Aus	CWST	1943 Jul
50			 8:45	AW	CWST
51
52# Queensland
53#
54# From Alex Livingston (1996-11-01):
55# I have heard or read more than once that some resort islands off the coast
56# of Queensland chose to keep observing daylight-saving time even after
57# Queensland ceased to.
58#
59# From Paul Eggert (1996-11-22):
60# IATA SSIM (1993-02/1994-09) say that the Holiday Islands (Hayman, Lindeman,
61# Hamilton) observed DST for two years after the rest of Queensland stopped.
62# Hamilton is the largest, but there is also a Hamilton in Victoria,
63# so use Lindeman.
64#
65# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
66Rule	AQ	1971	only	-	Oct	lastSun	2:00s	1:00	-
67Rule	AQ	1972	only	-	Feb	lastSun	2:00s	0	-
68Rule	AQ	1989	1991	-	Oct	lastSun	2:00s	1:00	-
69Rule	AQ	1990	1992	-	Mar	Sun>=1	2:00s	0	-
70Rule	Holiday	1992	1993	-	Oct	lastSun	2:00s	1:00	-
71Rule	Holiday	1993	1994	-	Mar	Sun>=1	2:00s	0	-
72Zone Australia/Brisbane	10:12:08 -	LMT	1895
73			10:00	Aus	EST	1971
74			10:00	AQ	EST
75Zone Australia/Lindeman  9:55:56 -	LMT	1895
76			10:00	Aus	EST	1971
77			10:00	AQ	EST	1992 Jul
78			10:00	Holiday	EST
79
80# South Australia
81# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
82Rule	AS	1971	1985	-	Oct	lastSun	2:00s	1:00	-
83Rule	AS	1986	only	-	Oct	19	2:00s	1:00	-
84Rule	AS	1987	2007	-	Oct	lastSun	2:00s	1:00	-
85Rule	AS	1972	only	-	Feb	27	2:00s	0	-
86Rule	AS	1973	1985	-	Mar	Sun>=1	2:00s	0	-
87Rule	AS	1986	1989	-	Mar	Sun>=15	2:00s	0	-
88Rule	AS	1990	only	-	Mar	Sun>=18	2:00s	0	-
89Rule	AS	1991	only	-	Mar	Sun>=1	2:00s	0	-
90Rule	AS	1992	only	-	Mar	Sun>=18	2:00s	0	-
91Rule	AS	1993	only	-	Mar	Sun>=1	2:00s	0	-
92Rule	AS	1994	only	-	Mar	Sun>=18	2:00s	0	-
93Rule	AS	1995	2005	-	Mar	lastSun	2:00s	0	-
94Rule	AS	2006	only	-	Apr	Sun>=1	2:00s	0	-
95Rule	AS	2007	only	-	Mar	lastSun	2:00s	0	-
96Rule	AS	2008	max	-	Apr	Sun>=1	2:00s	0	-
97Rule	AS	2008	max	-	Oct	Sun>=1	2:00s	1:00	-
98# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
99Zone Australia/Adelaide	9:14:20 -	LMT	1895 Feb
100			9:00	-	CST	1899 May
101			9:30	Aus	CST	1971
102			9:30	AS	CST
103
104# Tasmania
105#
106# From Paul Eggert (2005-08-16):
107# <http://www.bom.gov.au/climate/averages/tables/dst_times.shtml>
108# says King Island didn't observe DST from WWII until late 1971.
109#
110# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
111Rule	AT	1967	only	-	Oct	Sun>=1	2:00s	1:00	-
112Rule	AT	1968	only	-	Mar	lastSun	2:00s	0	-
113Rule	AT	1968	1985	-	Oct	lastSun	2:00s	1:00	-
114Rule	AT	1969	1971	-	Mar	Sun>=8	2:00s	0	-
115Rule	AT	1972	only	-	Feb	lastSun	2:00s	0	-
116Rule	AT	1973	1981	-	Mar	Sun>=1	2:00s	0	-
117Rule	AT	1982	1983	-	Mar	lastSun	2:00s	0	-
118Rule	AT	1984	1986	-	Mar	Sun>=1	2:00s	0	-
119Rule	AT	1986	only	-	Oct	Sun>=15	2:00s	1:00	-
120Rule	AT	1987	1990	-	Mar	Sun>=15	2:00s	0	-
121Rule	AT	1987	only	-	Oct	Sun>=22	2:00s	1:00	-
122Rule	AT	1988	1990	-	Oct	lastSun	2:00s	1:00	-
123Rule	AT	1991	1999	-	Oct	Sun>=1	2:00s	1:00	-
124Rule	AT	1991	2005	-	Mar	lastSun	2:00s	0	-
125Rule	AT	2000	only	-	Aug	lastSun	2:00s	1:00	-
126Rule	AT	2001	max	-	Oct	Sun>=1	2:00s	1:00	-
127Rule	AT	2006	only	-	Apr	Sun>=1	2:00s	0	-
128Rule	AT	2007	only	-	Mar	lastSun	2:00s	0	-
129Rule	AT	2008	max	-	Apr	Sun>=1	2:00s	0	-
130# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
131Zone Australia/Hobart	9:49:16	-	LMT	1895 Sep
132			10:00	-	EST	1916 Oct 1 2:00
133			10:00	1:00	EST	1917 Feb
134			10:00	Aus	EST	1967
135			10:00	AT	EST
136Zone Australia/Currie	9:35:28	-	LMT	1895 Sep
137			10:00	-	EST	1916 Oct 1 2:00
138			10:00	1:00	EST	1917 Feb
139			10:00	Aus	EST	1971 Jul
140			10:00	AT	EST
141
142# Victoria
143# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
144Rule	AV	1971	1985	-	Oct	lastSun	2:00s	1:00	-
145Rule	AV	1972	only	-	Feb	lastSun	2:00s	0	-
146Rule	AV	1973	1985	-	Mar	Sun>=1	2:00s	0	-
147Rule	AV	1986	1990	-	Mar	Sun>=15	2:00s	0	-
148Rule	AV	1986	1987	-	Oct	Sun>=15	2:00s	1:00	-
149Rule	AV	1988	1999	-	Oct	lastSun	2:00s	1:00	-
150Rule	AV	1991	1994	-	Mar	Sun>=1	2:00s	0	-
151Rule	AV	1995	2005	-	Mar	lastSun	2:00s	0	-
152Rule	AV	2000	only	-	Aug	lastSun	2:00s	1:00	-
153Rule	AV	2001	2007	-	Oct	lastSun	2:00s	1:00	-
154Rule	AV	2006	only	-	Apr	Sun>=1	2:00s	0	-
155Rule	AV	2007	only	-	Mar	lastSun	2:00s	0	-
156Rule	AV	2008	max	-	Apr	Sun>=1	2:00s	0	-
157Rule	AV	2008	max	-	Oct	Sun>=1	2:00s	1:00	-
158# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
159Zone Australia/Melbourne 9:39:52 -	LMT	1895 Feb
160			10:00	Aus	EST	1971
161			10:00	AV	EST
162
163# New South Wales
164# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
165Rule	AN	1971	1985	-	Oct	lastSun	2:00s	1:00	-
166Rule	AN	1972	only	-	Feb	27	2:00s	0	-
167Rule	AN	1973	1981	-	Mar	Sun>=1	2:00s	0	-
168Rule	AN	1982	only	-	Apr	Sun>=1	2:00s	0	-
169Rule	AN	1983	1985	-	Mar	Sun>=1	2:00s	0	-
170Rule	AN	1986	1989	-	Mar	Sun>=15	2:00s	0	-
171Rule	AN	1986	only	-	Oct	19	2:00s	1:00	-
172Rule	AN	1987	1999	-	Oct	lastSun	2:00s	1:00	-
173Rule	AN	1990	1995	-	Mar	Sun>=1	2:00s	0	-
174Rule	AN	1996	2005	-	Mar	lastSun	2:00s	0	-
175Rule	AN	2000	only	-	Aug	lastSun	2:00s	1:00	-
176Rule	AN	2001	2007	-	Oct	lastSun	2:00s	1:00	-
177Rule	AN	2006	only	-	Apr	Sun>=1	2:00s	0	-
178Rule	AN	2007	only	-	Mar	lastSun	2:00s	0	-
179Rule	AN	2008	max	-	Apr	Sun>=1	2:00s	0	-
180Rule	AN	2008	max	-	Oct	Sun>=1	2:00s	1:00	-
181# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
182Zone Australia/Sydney	10:04:52 -	LMT	1895 Feb
183			10:00	Aus	EST	1971
184			10:00	AN	EST
185Zone Australia/Broken_Hill 9:25:48 -	LMT	1895 Feb
186			10:00	-	EST	1896 Aug 23
187			9:00	-	CST	1899 May
188			9:30	Aus	CST	1971
189			9:30	AN	CST	2000
190			9:30	AS	CST
191
192# Lord Howe Island
193# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
194Rule	LH	1981	1984	-	Oct	lastSun	2:00	1:00	-
195Rule	LH	1982	1985	-	Mar	Sun>=1	2:00	0	-
196Rule	LH	1985	only	-	Oct	lastSun	2:00	0:30	-
197Rule	LH	1986	1989	-	Mar	Sun>=15	2:00	0	-
198Rule	LH	1986	only	-	Oct	19	2:00	0:30	-
199Rule	LH	1987	1999	-	Oct	lastSun	2:00	0:30	-
200Rule	LH	1990	1995	-	Mar	Sun>=1	2:00	0	-
201Rule	LH	1996	2005	-	Mar	lastSun	2:00	0	-
202Rule	LH	2000	only	-	Aug	lastSun	2:00	0:30	-
203Rule	LH	2001	2007	-	Oct	lastSun	2:00	0:30	-
204Rule	LH	2006	only	-	Apr	Sun>=1	2:00	0	-
205Rule	LH	2007	only	-	Mar	lastSun	2:00	0	-
206Rule	LH	2008	max	-	Apr	Sun>=1	2:00	0	-
207Rule	LH	2008	max	-	Oct	Sun>=1	2:00	0:30	-
208Zone Australia/Lord_Howe 10:36:20 -	LMT	1895 Feb
209			10:00	-	EST	1981 Mar
210			10:30	LH	LHST
211
212# Australian miscellany
213#
214# Ashmore Is, Cartier
215# no indigenous inhabitants; only seasonal caretakers
216# no times are set
217#
218# Coral Sea Is
219# no indigenous inhabitants; only meteorologists
220# no times are set
221#
222# Macquarie
223# permanent occupation (scientific station) since 1948;
224# sealing and penguin oil station operated 1888/1917
225# like Australia/Hobart
226
227# Christmas
228# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
229Zone Indian/Christmas	7:02:52 -	LMT	1895 Feb
230			7:00	-	CXT	# Christmas Island Time
231
232# Cook Is
233# From Shanks & Pottenger:
234# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
235Rule	Cook	1978	only	-	Nov	12	0:00	0:30	HS
236Rule	Cook	1979	1991	-	Mar	Sun>=1	0:00	0	-
237Rule	Cook	1979	1990	-	Oct	lastSun	0:00	0:30	HS
238# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
239Zone Pacific/Rarotonga	-10:39:04 -	LMT	1901		# Avarua
240			-10:30	-	CKT	1978 Nov 12	# Cook Is Time
241			-10:00	Cook	CK%sT
242
243# Cocos
244# These islands were ruled by the Ross family from about 1830 to 1978.
245# We don't know when standard time was introduced; for now, we guess 1900.
246# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
247Zone	Indian/Cocos	6:27:40	-	LMT	1900
248			6:30	-	CCT	# Cocos Islands Time
249
250# Fiji
251# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
252Rule	Fiji	1998	1999	-	Nov	Sun>=1	2:00	1:00	S
253Rule	Fiji	1999	2000	-	Feb	lastSun	3:00	0	-
254# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
255Zone	Pacific/Fiji	11:53:40 -	LMT	1915 Oct 26	# Suva
256			12:00	Fiji	FJ%sT	# Fiji Time
257
258# French Polynesia
259# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
260Zone	Pacific/Gambier	 -8:59:48 -	LMT	1912 Oct	# Rikitea
261			 -9:00	-	GAMT	# Gambier Time
262Zone	Pacific/Marquesas -9:18:00 -	LMT	1912 Oct
263			 -9:30	-	MART	# Marquesas Time
264Zone	Pacific/Tahiti	 -9:58:16 -	LMT	1912 Oct	# Papeete
265			-10:00	-	TAHT	# Tahiti Time
266# Clipperton (near North America) is administered from French Polynesia;
267# it is uninhabited.
268
269# Guam
270# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
271Zone	Pacific/Guam	-14:21:00 -	LMT	1844 Dec 31
272			 9:39:00 -	LMT	1901		# Agana
273			10:00	-	GST	2000 Dec 23	# Guam
274			10:00	-	ChST	# Chamorro Standard Time
275
276# Kiribati
277# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
278Zone Pacific/Tarawa	 11:32:04 -	LMT	1901		# Bairiki
279			 12:00	-	GILT		 # Gilbert Is Time
280Zone Pacific/Enderbury	-11:24:20 -	LMT	1901
281			-12:00	-	PHOT	1979 Oct # Phoenix Is Time
282			-11:00	-	PHOT	1995
283			 13:00	-	PHOT
284Zone Pacific/Kiritimati	-10:29:20 -	LMT	1901
285			-10:40	-	LINT	1979 Oct # Line Is Time
286			-10:00	-	LINT	1995
287			 14:00	-	LINT
288
289# N Mariana Is
290# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
291Zone Pacific/Saipan	-14:17:00 -	LMT	1844 Dec 31
292			 9:43:00 -	LMT	1901
293			 9:00	-	MPT	1969 Oct # N Mariana Is Time
294			10:00	-	MPT	2000 Dec 23
295			10:00	-	ChST	# Chamorro Standard Time
296
297# Marshall Is
298# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
299Zone Pacific/Majuro	11:24:48 -	LMT	1901
300			11:00	-	MHT	1969 Oct # Marshall Islands Time
301			12:00	-	MHT
302Zone Pacific/Kwajalein	11:09:20 -	LMT	1901
303			11:00	-	MHT	1969 Oct
304			-12:00	-	KWAT	1993 Aug 20	# Kwajalein Time
305			12:00	-	MHT
306
307# Micronesia
308# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
309Zone Pacific/Truk	10:07:08 -	LMT	1901
310			10:00	-	TRUT			# Truk Time
311Zone Pacific/Ponape	10:32:52 -	LMT	1901		# Kolonia
312			11:00	-	PONT			# Ponape Time
313Zone Pacific/Kosrae	10:51:56 -	LMT	1901
314			11:00	-	KOST	1969 Oct	# Kosrae Time
315			12:00	-	KOST	1999
316			11:00	-	KOST
317
318# Nauru
319# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
320Zone	Pacific/Nauru	11:07:40 -	LMT	1921 Jan 15	# Uaobe
321			11:30	-	NRT	1942 Mar 15	# Nauru Time
322			9:00	-	JST	1944 Aug 15
323			11:30	-	NRT	1979 May
324			12:00	-	NRT
325
326# New Caledonia
327# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
328Rule	NC	1977	1978	-	Dec	Sun>=1	0:00	1:00	S
329Rule	NC	1978	1979	-	Feb	27	0:00	0	-
330Rule	NC	1996	only	-	Dec	 1	2:00s	1:00	S
331# Shanks & Pottenger say the following was at 2:00; go with IATA.
332Rule	NC	1997	only	-	Mar	 2	2:00s	0	-
333# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
334Zone	Pacific/Noumea	11:05:48 -	LMT	1912 Jan 13
335			11:00	NC	NC%sT
336
337
338###############################################################################
339
340# New Zealand
341
342# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
343Rule	NZ	1927	only	-	Nov	 6	2:00	1:00	S
344Rule	NZ	1928	only	-	Mar	 4	2:00	0	M
345Rule	NZ	1928	1933	-	Oct	Sun>=8	2:00	0:30	S
346Rule	NZ	1929	1933	-	Mar	Sun>=15	2:00	0	M
347Rule	NZ	1934	1940	-	Apr	lastSun	2:00	0	M
348Rule	NZ	1934	1940	-	Sep	lastSun	2:00	0:30	S
349Rule	NZ	1946	only	-	Jan	 1	0:00	0	S
350# Since 1957 Chatham has been 45 minutes ahead of NZ, but there's no
351# convenient notation for this so we must duplicate the Rule lines.
352Rule	NZ	1974	only	-	Nov	Sun>=1	2:00s	1:00	D
353Rule	Chatham	1974	only	-	Nov	Sun>=1	2:45s	1:00	D
354Rule	NZ	1975	only	-	Feb	lastSun	2:00s	0	S
355Rule	Chatham	1975	only	-	Feb	lastSun	2:45s	0	S
356Rule	NZ	1975	1988	-	Oct	lastSun	2:00s	1:00	D
357Rule	Chatham	1975	1988	-	Oct	lastSun	2:45s	1:00	D
358Rule	NZ	1976	1989	-	Mar	Sun>=1	2:00s	0	S
359Rule	Chatham	1976	1989	-	Mar	Sun>=1	2:45s	0	S
360Rule	NZ	1989	only	-	Oct	Sun>=8	2:00s	1:00	D
361Rule	Chatham	1989	only	-	Oct	Sun>=8	2:45s	1:00	D
362Rule	NZ	1990	2006	-	Oct	Sun>=1	2:00s	1:00	D
363Rule	Chatham	1990	2006	-	Oct	Sun>=1	2:45s	1:00	D
364Rule	NZ	1990	2007	-	Mar	Sun>=15	2:00s	0	S
365Rule	Chatham	1990	2007	-	Mar	Sun>=15	2:45s	0	S
366Rule	NZ	2007	max	-	Sep	lastSun	2:00s	1:00	D
367Rule	Chatham	2007	max	-	Sep	lastSun	2:45s	1:00	D
368Rule	NZ	2008	max	-	Apr	Sun>=1	2:00s	0	S
369Rule	Chatham	2008	max	-	Apr	Sun>=1	2:45s	0	S
370# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
371Zone Pacific/Auckland	11:39:04 -	LMT	1868 Nov  2
372			11:30	NZ	NZ%sT	1946 Jan  1
373			12:00	NZ	NZ%sT
374Zone Pacific/Chatham	12:13:48 -	LMT	1957 Jan  1
375			12:45	Chatham	CHA%sT
376
377
378# Auckland Is
379# uninhabited; Maori and Moriori, colonial settlers, pastoralists, sealers,
380# and scientific personnel have wintered
381
382# Campbell I
383# minor whaling stations operated 1909/1914
384# scientific station operated 1941/1995;
385# previously whalers, sealers, pastoralists, and scientific personnel wintered
386# was probably like Pacific/Auckland
387
388###############################################################################
389
390
391# Niue
392# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
393Zone	Pacific/Niue	-11:19:40 -	LMT	1901		# Alofi
394			-11:20	-	NUT	1951	# Niue Time
395			-11:30	-	NUT	1978 Oct 1
396			-11:00	-	NUT
397
398# Norfolk
399# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
400Zone	Pacific/Norfolk	11:11:52 -	LMT	1901		# Kingston
401			11:12	-	NMT	1951	# Norfolk Mean Time
402			11:30	-	NFT		# Norfolk Time
403
404# Palau (Belau)
405# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
406Zone Pacific/Palau	8:57:56 -	LMT	1901		# Koror
407			9:00	-	PWT	# Palau Time
408
409# Papua New Guinea
410# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
411Zone Pacific/Port_Moresby 9:48:40 -	LMT	1880
412			9:48:32	-	PMMT	1895	# Port Moresby Mean Time
413			10:00	-	PGT		# Papua New Guinea Time
414
415# Pitcairn
416# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
417Zone Pacific/Pitcairn	-8:40:20 -	LMT	1901		# Adamstown
418			-8:30	-	PNT	1998 Apr 27 00:00
419			-8:00	-	PST	# Pitcairn Standard Time
420
421# American Samoa
422Zone Pacific/Pago_Pago	 12:37:12 -	LMT	1879 Jul  5
423			-11:22:48 -	LMT	1911
424			-11:30	-	SAMT	1950		# Samoa Time
425			-11:00	-	NST	1967 Apr	# N=Nome
426			-11:00	-	BST	1983 Nov 30	# B=Bering
427			-11:00	-	SST			# S=Samoa
428
429# Samoa
430
431# From Alexander Krivenyshev (2008-12-06):
432# The Samoa government (Western Samoa) may implement DST on the first Sunday of 
433# October 2009 (October 4, 2009) until the last Sunday of March 2010 (March 28, 
434# 2010). 
435# 
436# "Selected Committee reports to Cabinet on Daylight Saving Time",
437# Government of Samoa:
438# <a href="http://www.govt.ws/pr_article.cfm?pr_id=560">
439# http://www.govt.ws/pr_article.cfm?pr_id=560
440# </a>
441# or
442# <a href="http://www.worldtimezone.com/dst_news/dst_news_samoa01.html">
443# http://www.worldtimezone.com/dst_news/dst_news_samoa01.html
444# </a>
445
446Zone Pacific/Apia	 12:33:04 -	LMT	1879 Jul  5
447			-11:26:56 -	LMT	1911
448			-11:30	-	SAMT	1950		# Samoa Time
449			-11:00	-	WST			# Samoa Time
450
451# Solomon Is
452# excludes Bougainville, for which see Papua New Guinea
453# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
454Zone Pacific/Guadalcanal 10:39:48 -	LMT	1912 Oct	# Honiara
455			11:00	-	SBT	# Solomon Is Time
456
457# Tokelau Is
458# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
459Zone	Pacific/Fakaofo	-11:24:56 -	LMT	1901
460			-10:00	-	TKT	# Tokelau Time
461
462# Tonga
463# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
464Rule	Tonga	1999	only	-	Oct	 7	2:00s	1:00	S
465Rule	Tonga	2000	only	-	Mar	19	2:00s	0	-
466Rule	Tonga	2000	2001	-	Nov	Sun>=1	2:00	1:00	S
467Rule	Tonga	2001	2002	-	Jan	lastSun	2:00	0	-
468# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
469Zone Pacific/Tongatapu	12:19:20 -	LMT	1901
470			12:20	-	TOT	1941 # Tonga Time
471			13:00	-	TOT	1999
472			13:00	Tonga	TO%sT
473
474# Tuvalu
475# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
476Zone Pacific/Funafuti	11:56:52 -	LMT	1901
477			12:00	-	TVT	# Tuvalu Time
478
479
480# US minor outlying islands
481
482# Howland, Baker
483# Howland was mined for guano by American companies 1857-1878 and British
484# 1886-1891; Baker was similar but exact dates are not known.
485# Inhabited by civilians 1935-1942; U.S. military bases 1943-1944;
486# uninhabited thereafter.
487# Howland observed Hawaii Standard Time (UTC-10:30) in 1937;
488# see page 206 of Elgen M. Long and Marie K. Long,
489# Amelia Earhart: the Mystery Solved, Simon & Schuster (2000).
490# So most likely Howland and Baker observed Hawaii Time from 1935
491# until they were abandoned after the war.
492
493# Jarvis
494# Mined for guano by American companies 1857-1879 and British 1883?-1891?.
495# Inhabited by civilians 1935-1942; IGY scientific base 1957-1958;
496# uninhabited thereafter.
497# no information; was probably like Pacific/Kiritimati
498
499# Johnston
500# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
501Zone Pacific/Johnston	-10:00	-	HST
502
503# Kingman
504# uninhabited
505
506# Midway
507#
508# From Mark Brader (2005-01-23):
509# [Fallacies and Fantasies of Air Transport History, by R.E.G. Davies,
510# published 1994 by Paladwr Press, McLean, VA, USA; ISBN 0-9626483-5-3]
511# reproduced a Pan American Airways timeables from 1936, for their weekly
512# "Orient Express" flights between San Francisco and Manila, and connecting
513# flights to Chicago and the US East Coast.  As it uses some time zone
514# designations that I've never seen before:....
515# Fri. 6:30A Lv. HONOLOLU (Pearl Harbor), H.I.   H.L.T. Ar. 5:30P Sun.
516#  "   3:00P Ar. MIDWAY ISLAND . . . . . . . . . M.L.T. Lv. 6:00A  "
517#
518Zone Pacific/Midway	-11:49:28 -	LMT	1901
519			-11:00	-	NST	1956 Jun  3
520			-11:00	1:00	NDT	1956 Sep  2
521			-11:00	-	NST	1967 Apr	# N=Nome
522			-11:00	-	BST	1983 Nov 30	# B=Bering
523			-11:00	-	SST			# S=Samoa
524
525# Palmyra
526# uninhabited since World War II; was probably like Pacific/Kiritimati
527
528# Wake
529# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
530Zone	Pacific/Wake	11:06:28 -	LMT	1901
531			12:00	-	WAKT	# Wake Time
532
533
534# Vanuatu
535# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
536Rule	Vanuatu	1983	only	-	Sep	25	0:00	1:00	S
537Rule	Vanuatu	1984	1991	-	Mar	Sun>=23	0:00	0	-
538Rule	Vanuatu	1984	only	-	Oct	23	0:00	1:00	S
539Rule	Vanuatu	1985	1991	-	Sep	Sun>=23	0:00	1:00	S
540Rule	Vanuatu	1992	1993	-	Jan	Sun>=23	0:00	0	-
541Rule	Vanuatu	1992	only	-	Oct	Sun>=23	0:00	1:00	S
542# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
543Zone	Pacific/Efate	11:13:16 -	LMT	1912 Jan 13		# Vila
544			11:00	Vanuatu	VU%sT	# Vanuatu Time
545
546# Wallis and Futuna
547# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
548Zone	Pacific/Wallis	12:15:20 -	LMT	1901
549			12:00	-	WFT	# Wallis & Futuna Time
550
551###############################################################################
552
553# NOTES
554
555# This data is by no means authoritative; if you think you know better,
556# go ahead and edit the file (and please send any changes to
557# tz@elsie.nci.nih.gov for general use in the future).
558
559# From Paul Eggert (2006-03-22):
560# A good source for time zone historical data outside the U.S. is
561# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
562# San Diego: ACS Publications, Inc. (2003).
563#
564# Gwillim Law writes that a good source
565# for recent time zone data is the International Air Transport
566# Association's Standard Schedules Information Manual (IATA SSIM),
567# published semiannually.  Law sent in several helpful summaries
568# of the IATA's data after 1990.
569#
570# Except where otherwise noted, Shanks & Pottenger is the source for
571# entries through 1990, and IATA SSIM is the source for entries afterwards.
572#
573# Another source occasionally used is Edward W. Whitman, World Time Differences,
574# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), which
575# I found in the UCLA library.
576#
577# A reliable and entertaining source about time zones is
578# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
579#
580# I invented the abbreviations marked `*' in the following table;
581# the rest are from earlier versions of this file, or from other sources.
582# Corrections are welcome!
583#		std dst
584#		LMT	Local Mean Time
585#	  8:00	WST WST	Western Australia
586#	  8:45	CWST CWST Central Western Australia*
587#	  9:00	JST	Japan
588#	  9:30	CST CST	Central Australia
589#	 10:00	EST EST	Eastern Australia
590#	 10:00	ChST	Chamorro
591#	 10:30	LHST LHST Lord Howe*
592#	 11:30	NZMT NZST New Zealand through 1945
593#	 12:00	NZST NZDT New Zealand 1946-present
594#	 12:45	CHAST CHADT Chatham*
595#	-11:00	SST	Samoa
596#	-10:00	HST	Hawaii
597#	- 8:00	PST	Pitcairn*
598#
599# See the `northamerica' file for Hawaii.
600# See the `southamerica' file for Easter I and the Galapagos Is.
601
602###############################################################################
603
604# Australia
605
606# From Paul Eggert (2005-12-08):
607# <a href="http://www.bom.gov.au/climate/averages/tables/dst_times.shtml">
608# Implementation Dates of Daylight Saving Time within Australia
609# </a> summarizes daylight saving issues in Australia.
610
611# From Arthur David Olson (2005-12-12):
612# <a href="http://www.lawlink.nsw.gov.au/lawlink/Corporate/ll_agdinfo.nsf/pages/community_relations_daylight_saving">
613# Lawlink NSW:Daylight Saving in New South Wales
614# </a> covers New South Wales in particular.
615
616# From John Mackin (1991-03-06):
617# We in Australia have _never_ referred to DST as `daylight' time.
618# It is called `summer' time.  Now by a happy coincidence, `summer'
619# and `standard' happen to start with the same letter; hence, the
620# abbreviation does _not_ change...
621# The legislation does not actually define abbreviations, at least
622# in this State, but the abbreviation is just commonly taken to be the
623# initials of the phrase, and the legislation here uniformly uses
624# the phrase `summer time' and does not use the phrase `daylight
625# time'.
626# Announcers on the Commonwealth radio network, the ABC (for Australian
627# Broadcasting Commission), use the phrases `Eastern Standard Time'
628# or `Eastern Summer Time'.  (Note, though, that as I say in the
629# current australasia file, there is really no such thing.)  Announcers
630# on its overseas service, Radio Australia, use the same phrases
631# prefixed by the word `Australian' when referring to local times;
632# time announcements on that service, naturally enough, are made in UTC.
633
634# From Arthur David Olson (1992-03-08):
635# Given the above, what's chosen for year-round use is:
636#	CST	for any place operating at a GMTOFF of 9:30
637#	WST	for any place operating at a GMTOFF of 8:00
638#	EST	for any place operating at a GMTOFF of 10:00
639
640# From Chuck Soper (2006-06-01):
641# I recently found this Australian government web page on time zones:
642# <http://www.australia.gov.au/about-australia-13time>
643# And this government web page lists time zone names and abbreviations:
644# <http://www.bom.gov.au/climate/averages/tables/daysavtm.shtml>
645
646# From Paul Eggert (2001-04-05), summarizing a long discussion about "EST"
647# versus "AEST" etc.:
648#
649# I see the following points of dispute:
650#
651# * How important are unique time zone abbreviations?
652#
653#   Here I tend to agree with the point (most recently made by Chris
654#   Newman) that unique abbreviations should not be essential for proper
655#   operation of software.  We have other instances of ambiguity
656#   (e.g. "IST" denoting both "Israel Standard Time" and "Indian
657#   Standard Time"), and they are not likely to go away any time soon.
658#   In the old days, some software mistakenly relied on unique
659#   abbreviations, but this is becoming less true with time, and I don't
660#   think it's that important to cater to such software these days.
661#
662#   On the other hand, there is another motivation for unambiguous
663#   abbreviations: it cuts down on human confusion.  This is
664#   particularly true for Australia, where "EST" can mean one thing for
665#   time T and a different thing for time T plus 1 second.
666#
667# * Does the relevant legislation indicate which abbreviations should be used?
668#
669#   Here I tend to think that things are a mess, just as they are in
670#   many other countries.  We Americans are currently disagreeing about
671#   which abbreviation to use for the newly legislated Chamorro Standard
672#   Time, for example.
673#
674#   Personally, I would prefer to use common practice; I would like to
675#   refer to legislation only for examples of common practice, or as a
676#   tiebreaker.
677#
678# * Do Australians more often use "Eastern Daylight Time" or "Eastern
679#   Summer Time"?  Do they typically prefix the time zone names with
680#   the word "Australian"?
681#
682#   My own impression is that both "Daylight Time" and "Summer Time" are
683#   common and are widely understood, but that "Summer Time" is more
684#   popular; and that the leading "A" is also common but is omitted more
685#   often than not.  I just used AltaVista advanced search and got the
686#   following count of page hits:
687#
688#     1,103 "Eastern Summer Time" AND domain:au
689#       971 "Australian Eastern Summer Time" AND domain:au
690#       613 "Eastern Daylight Time" AND domain:au
691#       127 "Australian Eastern Daylight Time" AND domain:au
692#
693#   Here "Summer" seems quite a bit more popular than "Daylight",
694#   particularly when we know the time zone is Australian and not US,
695#   say.  The "Australian" prefix seems to be popular for Eastern Summer
696#   Time, but unpopular for Eastern Daylight Time.
697#
698#   For abbreviations, tools like AltaVista are less useful because of
699#   ambiguity.  Many hits are not really time zones, unfortunately, and
700#   many hits denote US time zones and not Australian ones.  But here
701#   are the hit counts anyway:
702#
703#     161,304 "EST" and domain:au
704#      25,156 "EDT" and domain:au
705#      18,263 "AEST" and domain:au
706#      10,416 "AEDT" and domain:au
707#
708#      14,538 "CST" and domain:au
709#       5,728 "CDT" and domain:au
710#         176 "ACST" and domain:au
711#          29 "ACDT" and domain:au
712#
713#       7,539 "WST" and domain:au
714#          68 "AWST" and domain:au
715#
716#   This data suggest that Australians tend to omit the "A" prefix in
717#   practice.  The situation for "ST" versus "DT" is less clear, given
718#   the ambiguities involved.
719#
720# * How do Australians feel about the abbreviations in the tz database?
721#
722#   If you just count Australians on this list, I count 2 in favor and 3
723#   against.  One of the "against" votes (David Keegel) counseled delay,
724#   saying that both AEST/AEDT and EST/EST are widely used and
725#   understood in Australia.
726
727# From Paul Eggert (1995-12-19):
728# Shanks & Pottenger report 2:00 for all autumn changes in Australia and NZ.
729# Mark Prior writes that his newspaper
730# reports that NSW's fall 1995 change will occur at 2:00,
731# but Robert Elz says it's been 3:00 in Victoria since 1970
732# and perhaps the newspaper's `2:00' is referring to standard time.
733# For now we'll continue to assume 2:00s for changes since 1960.
734
735# From Eric Ulevik (1998-01-05):
736#
737# Here are some URLs to Australian time legislation. These URLs are stable,
738# and should probably be included in the data file. There are probably more
739# relevant entries in this database.
740#
741# NSW (including LHI and Broken Hill):
742# <a href="http://www.austlii.edu.au/au/legis/nsw/consol_act/sta1987137/index.html">
743# Standard Time Act 1987 (updated 1995-04-04)
744# </a>
745# ACT
746# <a href="http://www.austlii.edu.au/au/legis/act/consol_act/stasta1972279/index.html">
747# Standard Time and Summer Time Act 1972
748# </a>
749# SA
750# <a href="http://www.austlii.edu.au/au/legis/sa/consol_act/sta1898137/index.html">
751# Standard Time Act, 1898
752# </a>
753
754# From David Grosz (2005-06-13):
755# It was announced last week that Daylight Saving would be extended by
756# one week next year to allow for the 2006 Commonwealth Games.
757# Daylight Saving is now to end for next year only on the first Sunday
758# in April instead of the last Sunday in March.
759#
760# From Gwillim Law (2005-06-14):
761# I did some Googling and found that all of those states (and territory) plan
762# to extend DST together in 2006.
763# ACT: http://www.cmd.act.gov.au/mediareleases/fileread.cfm?file=86.txt
764# New South Wales: http://www.thecouriermail.news.com.au/common/story_page/0,5936,15538869%255E1702,00.html
765# South Australia: http://www.news.com.au/story/0,10117,15555031-1246,00.html
766# Tasmania: http://www.media.tas.gov.au/release.php?id=14772
767# Victoria: I wasn't able to find anything separate, but the other articles
768# allude to it.
769# But not Queensland
770# http://www.news.com.au/story/0,10117,15564030-1248,00.html.
771
772# Northern Territory
773
774# From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
775# # The NORTHERN TERRITORY..  [ Courtesy N.T. Dept of the Chief Minister ]
776# #					[ Nov 1990 ]
777# #	N.T. have never utilised any DST due to sub-tropical/tropical location.
778# ...
779# Zone        Australia/North         9:30    -       CST
780
781# From Bradley White (1991-03-04):
782# A recent excerpt from an Australian newspaper...
783# the Northern Territory do[es] not have daylight saving.
784
785# Western Australia
786
787# From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
788# #  The state of WESTERN AUSTRALIA..  [ Courtesy W.A. dept Premier+Cabinet ]
789# #						[ Nov 1990 ]
790# #	W.A. suffers from a great deal of public and political opposition to
791# #	DST in principle. A bill is brought before parliament in most years, but
792# #	usually defeated either in the upper house, or in party caucus
793# #	before reaching parliament.
794# ...
795# Zone	Australia/West		8:00	AW	%sST
796# ...
797# Rule	AW	1974	only	-	Oct	lastSun	2:00	1:00	D
798# Rule	AW	1975	only	-	Mar	Sun>=1	3:00	0	W
799# Rule	AW	1983	only	-	Oct	lastSun	2:00	1:00	D
800# Rule	AW	1984	only	-	Mar	Sun>=1	3:00	0	W
801
802# From Bradley White (1991-03-04):
803# A recent excerpt from an Australian newspaper...
804# Western Australia...do[es] not have daylight saving.
805
806# From John D. Newman via Bradley White (1991-11-02):
807# Western Australia is still on "winter time". Some DH in Sydney
808# rang me at home a few days ago at 6.00am. (He had just arrived at
809# work at 9.00am.)
810# W.A. is switching to Summer Time on Nov 17th just to confuse
811# everybody again.
812
813# From Arthur David Olson (1992-03-08):
814# The 1992 ending date used in the rules is a best guess;
815# it matches what was used in the past.
816
817# <a href="http://www.bom.gov.au/faq/faqgen.htm">
818# The Australian Bureau of Meteorology FAQ
819# </a> (1999-09-27) writes that Giles Meteorological Station uses
820# South Australian time even though it's located in Western Australia.
821
822# Queensland
823# From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
824# #   The state of QUEENSLAND.. [ Courtesy Qld. Dept Premier Econ&Trade Devel ]
825# #						[ Dec 1990 ]
826# ...
827# Zone	Australia/Queensland	10:00	AQ	%sST
828# ...
829# Rule	AQ	1971	only	-	Oct	lastSun	2:00	1:00	D
830# Rule	AQ	1972	only	-	Feb	lastSun	3:00	0	E
831# Rule	AQ	1989	max	-	Oct	lastSun	2:00	1:00	D
832# Rule	AQ	1990	max	-	Mar	Sun>=1	3:00	0	E
833
834# From Bradley White (1989-12-24):
835# "Australia/Queensland" now observes daylight time (i.e. from
836# October 1989).
837
838# From Bradley White (1991-03-04):
839# A recent excerpt from an Australian newspaper...
840# ...Queensland...[has] agreed to end daylight saving
841# at 3am tomorrow (March 3)...
842
843# From John Mackin (1991-03-06):
844# I can certainly confirm for my part that Daylight Saving in NSW did in fact
845# end on Sunday, 3 March.  I don't know at what hour, though.  (It surprised
846# me.)
847
848# From Bradley White (1992-03-08):
849# ...there was recently a referendum in Queensland which resulted
850# in the experimental daylight saving system being abandoned. So, ...
851# ...
852# Rule	QLD	1989	1991	-	Oct	lastSun	2:00	1:00	D
853# Rule	QLD	1990	1992	-	Mar	Sun>=1	3:00	0	S
854# ...
855
856# From Arthur David Olson (1992-03-08):
857# The chosen rules the union of the 1971/1972 change and the 1989-1992 changes.
858
859# From Christopher Hunt (2006-11-21), after an advance warning
860# from Jesper Norgaard Welen (2006-11-01):
861# WA are trialing DST for three years.
862# <http://www.parliament.wa.gov.au/parliament/bills.nsf/9A1B183144403DA54825721200088DF1/$File/Bill175-1B.pdf>
863
864# From Rives McDow (2002-04-09):
865# The most interesting region I have found consists of three towns on the
866# southern coast....  South Australia observes daylight saving time; Western
867# Australia does not.  The two states are one and a half hours apart.  The
868# residents decided to forget about this nonsense of changing the clock so
869# much and set the local time 20 hours and 45 minutes from the
870# international date line, or right in the middle of the time of South
871# Australia and Western Australia....
872#
873# From Paul Eggert (2002-04-09):
874# This is confirmed by the section entitled
875# "What's the deal with time zones???" in
876# <http://www.earthsci.unimelb.edu.au/~awatkins/null.html>.
877#
878# From Alex Livingston (2006-12-07):
879# ... it was just on four years ago that I drove along the Eyre Highway,
880# which passes through eastern Western Australia close to the southern
881# coast of the continent.
882#
883# I paid particular attention to the time kept there. There can be no
884# dispute that UTC+08:45 was considered "the time" from the border
885# village just inside the border with South Australia to as far west
886# as just east of Caiguna. There can also be no dispute that Eucla is
887# the largest population centre in this zone....
888#
889# Now that Western Australia is observing daylight saving, the
890# question arose whether this part of the state would follow suit. I
891# just called the border village and confirmed that indeed they have,
892# meaning that they are now observing UTC+09:45.
893#
894# (2006-12-09):
895# I personally doubt that either experimentation with daylight saving
896# in WA or its introduction in SA had anything to do with the genesis
897# of this time zone.  My hunch is that it's been around since well
898# before 1975.  I remember seeing it noted on road maps decades ago.
899
900# From Paul Eggert (2006-12-15):
901# For lack of better info, assume the tradition dates back to the
902# introduction of standard time in 1895.
903
904
905# southeast Australia
906#
907# From Paul Eggert (2007-07-23):
908# Starting autumn 2008 Victoria, NSW, South Australia, Tasmania and the ACT
909# end DST the first Sunday in April and start DST the first Sunday in October.
910# http://www.theage.com.au/news/national/daylight-savings-to-span-six-months/2007/06/27/1182623966703.html
911
912
913# South Australia
914
915# From Bradley White (1991-03-04):
916# A recent excerpt from an Australian newspaper...
917# ...South Australia...[has] agreed to end daylight saving
918# at 3am tomorrow (March 3)...
919
920# From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
921# #   The state of SOUTH AUSTRALIA....[ Courtesy of S.A. Dept of Labour ]
922# #						[ Nov 1990 ]
923# ...
924# Zone	Australia/South		9:30	AS	%sST
925# ...
926# Rule	 AS	1971	max	-	Oct	lastSun	2:00	1:00	D
927# Rule	 AS	1972	1985	-	Mar	Sun>=1	3:00	0	C
928# Rule	 AS	1986	1990	-	Mar	Sun>=15	3:00	0	C
929# Rule	 AS	1991	max	-	Mar	Sun>=1	3:00	0	C
930
931# From Bradley White (1992-03-11):
932# Recent correspondence with a friend in Adelaide
933# contained the following exchange:  "Due to the Adelaide Festival,
934# South Australia delays setting back our clocks for a few weeks."
935
936# From Robert Elz (1992-03-13):
937# I heard that apparently (or at least, it appears that)
938# South Aus will have an extra 3 weeks daylight saving every even
939# numbered year (from 1990).  That's when the Adelaide Festival
940# is on...
941
942# From Robert Elz (1992-03-16, 00:57:07 +1000):
943# DST didn't end in Adelaide today (yesterday)....
944# But whether it's "4th Sunday" or "2nd last Sunday" I have no idea whatever...
945# (it's just as likely to be "the Sunday we pick for this year"...).
946
947# From Bradley White (1994-04-11):
948# If Sun, 15 March, 1992 was at +1030 as kre asserts, but yet Sun, 20 March,
949# 1994 was at +0930 as John Connolly's customer seems to assert, then I can
950# only conclude that the actual rule is more complicated....
951
952# From John Warburton (1994-10-07):
953# The new Daylight Savings dates for South Australia ...
954# was gazetted in the Government Hansard on Sep 26 1994....
955# start on last Sunday in October and end in last sunday in March.
956
957# From Paul Eggert (2007-07-23):
958# See "southeast Australia" above for 2008 and later.
959
960# Tasmania
961
962# The rules for 1967 through 1991 were reported by George Shepherd
963# via Simon Woodhead via Robert Elz (1991-03-06):
964# #  The state of TASMANIA.. [Courtesy Tasmanian Dept of Premier + Cabinet ]
965# #					[ Nov 1990 ]
966
967# From Bill Hart via Guy Harris (1991-10-10):
968# Oh yes, the new daylight savings rules are uniquely tasmanian, we have
969# 6 weeks a year now when we are out of sync with the rest of Australia
970# (but nothing new about that).
971
972# From Alex Livingston (1999-10-04):
973# I heard on the ABC (Australian Broadcasting Corporation) radio news on the
974# (long) weekend that Tasmania, which usually goes its own way in this regard,
975# has decided to join with most of NSW, the ACT, and most of Victoria
976# (Australia) and start daylight saving on the last Sunday in August in 2000
977# instead of the first Sunday in October.
978
979# Sim Alam (2000-07-03) reported a legal citation for the 2000/2001 rules:
980# http://www.thelaw.tas.gov.au/fragview/42++1968+GS3A@EN+2000070300
981
982# From Paul Eggert (2007-07-23):
983# See "southeast Australia" above for 2008 and later.
984
985# Victoria
986
987# The rules for 1971 through 1991 were reported by George Shepherd
988# via Simon Woodhead via Robert Elz (1991-03-06):
989# #   The state of VICTORIA.. [ Courtesy of Vic. Dept of Premier + Cabinet ]
990# #						[ Nov 1990 ]
991
992# From Scott Harrington (2001-08-29):
993# On KQED's "City Arts and Lectures" program last night I heard an
994# interesting story about daylight savings time.  Dr. John Heilbron was
995# discussing his book "The Sun in the Church: Cathedrals as Solar
996# Observatories"[1], and in particular the Shrine of Remembrance[2] located
997# in Melbourne, Australia.
998#
999# Apparently the shrine's main purpose is a beam of sunlight which
1000# illuminates a special spot on the floor at the 11th hour of the 11th day
1001# of the 11th month (Remembrance Day) every year in memory of Australia's
1002# fallen WWI soldiers.  And if you go there on Nov. 11, at 11am local time,
1003# you will indeed see the sunbeam illuminate the special spot at the
1004# expected time.
1005#
1006# However, that is only because of some special mirror contraption that had
1007# to be employed, since due to daylight savings time, the true solar time of
1008# the remembrance moment occurs one hour later (or earlier?).  Perhaps
1009# someone with more information on this jury-rig can tell us more.
1010#
1011# [1] http://www.hup.harvard.edu/catalog/HEISUN.html
1012# [2] http://www.shrine.org.au
1013
1014# From Paul Eggert (2007-07-23):
1015# See "southeast Australia" above for 2008 and later.
1016
1017# New South Wales
1018
1019# From Arthur David Olson:
1020# New South Wales and subjurisdictions have their own ideas of a fun time.
1021# Based on law library research by John Mackin,
1022# who notes:
1023#	In Australia, time is not legislated federally, but rather by the
1024#	individual states.  Thus, while such terms as ``Eastern Standard Time''
1025#	[I mean, of course, Australian EST, not any other kind] are in common
1026#	use, _they have NO REAL MEANING_, as they are not defined in the
1027#	legislation.  This is very important to understand.
1028#	I have researched New South Wales time only...
1029
1030# From Eric Ulevik (1999-05-26):
1031# DST will start in NSW on the last Sunday of August, rather than the usual
1032# October in 2000.  [See: Matthew Moore,
1033# <a href="http://www.smh.com.au/news/9905/26/pageone/pageone4.html">
1034# Two months more daylight saving
1035# </a>
1036# Sydney Morning Herald (1999-05-26).]
1037
1038# From Paul Eggert (1999-09-27):
1039# See the following official NSW source:
1040# <a href="http://dir.gis.nsw.gov.au/cgi-bin/genobject/document/other/daylightsaving/tigGmZ">
1041# Daylight Saving in New South Wales.
1042# </a>
1043#
1044# Narrabri Shire (NSW) council has announced it will ignore the extension of
1045# daylight saving next year.  See:
1046# <a href="http://abc.net.au/news/regionals/neweng/monthly/regeng-22jul1999-1.htm">
1047# Narrabri Council to ignore daylight saving
1048# </a> (1999-07-22).  For now, we'll wait to see if this really happens.
1049#
1050# Victoria will following NSW.  See:
1051# <a href="http://abc.net.au/local/news/olympics/1999/07/item19990728112314_1.htm">
1052# Vic to extend daylight saving
1053# </a> (1999-07-28).
1054#
1055# However, South Australia rejected the DST request.  See:
1056# <a href="http://abc.net.au/news/olympics/1999/07/item19990719151754_1.htm">
1057# South Australia rejects Olympics daylight savings request
1058# </a> (1999-07-19).
1059#
1060# Queensland also will not observe DST for the Olympics.  See:
1061# <a href="http://abc.net.au/news/olympics/1999/06/item19990601114608_1.htm">
1062# Qld says no to daylight savings for Olympics
1063# </a> (1999-06-01), which quotes Queensland Premier Peter Beattie as saying
1064# ``Look you've got to remember in my family when this came up last time
1065# I voted for it, my wife voted against it and she said to me it's all very
1066# well for you, you don't have to worry about getting the children out of
1067# bed, getting them to school, getting them to sleep at night.
1068# I've been through all this argument domestically...my wife rules.''
1069#
1070# Broken Hill will stick with South Australian time in 2000.  See:
1071# <a href="http://abc.net.au/news/regionals/brokenh/monthly/regbrok-21jul1999-6.htm">
1072# Broken Hill to be behind the times
1073# </a> (1999-07-21).
1074
1075# IATA SSIM (1998-09) says that the spring 2000 change for Australian
1076# Capital Territory, New South Wales except Lord Howe Island and Broken
1077# Hill, and Victoria will be August 27, presumably due to the Sydney Olympics.
1078
1079# From Eric Ulevik, referring to Sydney's Sun Herald (2000-08-13), page 29:
1080# The Queensland Premier Peter Beattie is encouraging northern NSW
1081# towns to use Queensland time.
1082
1083# From Paul Eggert (2007-07-23):
1084# See "southeast Australia" above for 2008 and later.
1085
1086# Yancowinna
1087
1088# From John Mackin (1989-01-04):
1089# `Broken Hill' means the County of Yancowinna.
1090
1091# From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
1092# # YANCOWINNA..  [ Confirmation courtesy of Broken Hill Postmaster ]
1093# #					[ Dec 1990 ]
1094# ...
1095# # Yancowinna uses Central Standard Time, despite [its] location on the
1096# # New South Wales side of the S.A. border. Most business and social dealings
1097# # are with CST zones, therefore CST is legislated by local government
1098# # although the switch to Summer Time occurs in line with N.S.W. There have
1099# # been years when this did not apply, but the historical data is not
1100# # presently available.
1101# Zone	Australia/Yancowinna	9:30	 AY	%sST
1102# ...
1103# Rule	 AY	1971	1985	-	Oct	lastSun	2:00	1:00	D
1104# Rule	 AY	1972	only	-	Feb	lastSun	3:00	0	C
1105# [followed by other Rules]
1106
1107# Lord Howe Island
1108
1109# From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
1110# LHI...		[ Courtesy of Pauline Van Winsen ]
1111#					[ Dec 1990 ]
1112# Lord Howe Island is located off the New South Wales coast, and is half an
1113# hour ahead of NSW time.
1114
1115# From James Lonergan, Secretary, Lord Howe Island Board (2000-01-27):
1116# Lord Howe Island summer time in 2000/2001 will commence on the same
1117# date as the rest of NSW (i.e. 2000-08-27).  For your information the
1118# Lord Howe Island Board (controlling authority for the Island) is
1119# seeking the community's views on various options for summer time
1120# arrangements on the Island, e.g. advance clocks by 1 full hour
1121# instead of only 30 minutes.  Dependant on the wishes of residents
1122# the Board may approach the NSW government to change the existing
1123# arrangements.  The starting date for summer time on the Island will
1124# however always coincide with the rest of NSW.
1125
1126# From James Lonergan, Secretary, Lord Howe Island Board (2000-10-25):
1127# Lord Howe Island advances clocks by 30 minutes during DST in NSW and retards
1128# clocks by 30 minutes when DST finishes. Since DST was most recently
1129# introduced in NSW, the "changeover" time on the Island has been 02:00 as
1130# shown on clocks on LHI. I guess this means that for 30 minutes at the start
1131# of DST, LHI is actually 1 hour ahead of the rest of NSW.
1132
1133# From Paul Eggert (2006-03-22):
1134# For Lord Howe dates we use Shanks & Pottenger through 1989, and
1135# Lonergan thereafter.  For times we use Lonergan.
1136
1137# From Paul Eggert (2007-07-23):
1138# See "southeast Australia" above for 2008 and later.
1139
1140# From Steffen Thorsen (2009-04-28):
1141# According to the official press release, South Australia's extended daylight 
1142# saving period will continue with the same rules as used during the 2008-2009 
1143# summer (southern hemisphere).
1144# 
1145# From
1146# <a href="http://www.safework.sa.gov.au/uploaded_files/DaylightDatesSet.pdf">
1147# http://www.safework.sa.gov.au/uploaded_files/DaylightDatesSet.pdf
1148# </a>
1149# The extended daylight saving period that South Australia has been trialling 
1150# for over the last year is now set to be ongoing.
1151# Daylight saving will continue to start on the first Sunday in October each 
1152# year and finish on the first Sunday in April the following year.
1153# Industrial Relations Minister, Paul Caica, says this provides South Australia 
1154# with a consistent half hour time difference with NSW, Victoria, Tasmania and 
1155# the ACT for all 52 weeks of the year...
1156# 
1157# We have a wrap-up here:
1158# <a href="http://www.timeanddate.com/news/time/south-australia-extends-dst.html">
1159# http://www.timeanddate.com/news/time/south-australia-extends-dst.html
1160# </a>
1161###############################################################################
1162
1163# New Zealand
1164
1165# From Mark Davies (1990-10-03):
1166# the 1989/90 year was a trial of an extended "daylight saving" period.
1167# This trial was deemed successful and the extended period adopted for
1168# subsequent years (with the addition of a further week at the start).
1169# source -- phone call to Ministry of Internal Affairs Head Office.
1170
1171# From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
1172# # The Country of New Zealand   (Australia's east island -) Gee they hate that!
1173# #				   or is Australia the west island of N.Z.
1174# #	[ courtesy of Geoff Tribble.. Auckland N.Z. ]
1175# #				[ Nov 1990 ]
1176# ...
1177# Rule	NZ      1974    1988	-	Oct	lastSun	2:00	1:00	D
1178# Rule	NZ	1989	max	-	Oct	Sun>=1	2:00	1:00	D
1179# Rule	NZ      1975    1989	-	Mar	Sun>=1	3:00	0	S
1180# Rule	NZ	1990	max	-	Mar	lastSun	3:00	0	S
1181# ...
1182# Zone	NZ			12:00	NZ		NZ%sT	# New Zealand
1183# Zone	NZ-CHAT			12:45	-		NZ-CHAT # Chatham Island
1184
1185# From Arthur David Olson (1992-03-08):
1186# The chosen rules use the Davies October 8 values for the start of DST in 1989
1187# rather than the October 1 value.
1188
1189# From Paul Eggert (1995-12-19);
1190# Shank & Pottenger report 2:00 for all autumn changes in Australia and NZ.
1191# Robert Uzgalis writes that the New Zealand Daylight
1192# Savings Time Order in Council dated 1990-06-18 specifies 2:00 standard
1193# time on both the first Sunday in October and the third Sunday in March.
1194# As with Australia, we'll assume the tradition is 2:00s, not 2:00.
1195#
1196# From Paul Eggert (2006-03-22):
1197# The Department of Internal Affairs (DIA) maintains a brief history,
1198# as does Carol Squires; see tz-link.htm for the full references.
1199# Use these sources in preference to Shanks & Pottenger.
1200#
1201# For Chatham, IATA SSIM (1991/1999) gives the NZ rules but with
1202# transitions at 2:45 local standard time; this confirms that Chatham
1203# is always exactly 45 minutes ahead of Auckland.
1204
1205# From Colin Sharples (2007-04-30):
1206# DST will now start on the last Sunday in September, and end on the
1207# first Sunday in April.  The changes take effect this year, meaning
1208# that DST will begin on 2007-09-30 2008-04-06.
1209# http://www.dia.govt.nz/diawebsite.nsf/wpg_URL/Services-Daylight-Saving-Daylight-saving-to-be-extended
1210
1211###############################################################################
1212
1213
1214# Fiji
1215
1216# Howse writes (p 153) that in 1879 the British governor of Fiji
1217# enacted an ordinance standardizing the islands on Antipodean Time
1218# instead of the American system (which was one day behind).
1219
1220# From Rives McDow (1998-10-08):
1221# Fiji will introduce DST effective 0200 local time, 1998-11-01
1222# until 0300 local time 1999-02-28.  Each year the DST period will
1223# be from the first Sunday in November until the last Sunday in February.
1224
1225# From Paul Eggert (2000-01-08):
1226# IATA SSIM (1999-09) says DST ends 0100 local time.  Go with McDow.
1227
1228# From the BBC World Service (1998-10-31 11:32 UTC):
1229# The Fijiian government says the main reasons for the time change is to
1230# improve productivity and reduce road accidents.  But correspondents say it
1231# also hopes the move will boost Fiji's ability to compete with other pacific
1232# islands in the effort to attract tourists to witness the dawning of the new
1233# millenium.
1234
1235# http://www.fiji.gov.fj/press/2000_09/2000_09_13-05.shtml (2000-09-13)
1236# reports that Fiji has discontinued DST.
1237
1238# Johnston
1239
1240# Johnston data is from usno1995.
1241
1242
1243# Kiribati
1244
1245# From Paul Eggert (1996-01-22):
1246# Today's _Wall Street Journal_ (page 1) reports that Kiribati
1247# ``declared it the same day throught the country as of Jan. 1, 1995''
1248# as part of the competition to be first into the 21st century.
1249
1250
1251# Kwajalein
1252
1253# In comp.risks 14.87 (26 August 1993), Peter Neumann writes:
1254# I wonder what happened in Kwajalein, where there was NO Friday,
1255# 1993-08-20.  Thursday night at midnight Kwajalein switched sides with
1256# respect to the International Date Line, to rejoin its fellow islands,
1257# going from 11:59 p.m. Thursday to 12:00 m. Saturday in a blink.
1258
1259
1260# N Mariana Is, Guam
1261
1262# Howse writes (p 153) ``The Spaniards, on the other hand, reached the
1263# Philippines and the Ladrones from America,'' and implies that the Ladrones
1264# (now called the Marianas) kept American date for quite some time.
1265# For now, we assume the Ladrones switched at the same time as the Philippines;
1266# see Asia/Manila.
1267
1268# US Public Law 106-564 (2000-12-23) made UTC+10 the official standard time,
1269# under the name "Chamorro Standard Time".  There is no official abbreviation,
1270# but Congressman Robert A. Underwood, author of the bill that became law,
1271# wrote in a press release (2000-12-27) that he will seek the use of "ChST".
1272
1273
1274# Micronesia
1275
1276# Alan Eugene Davis writes (1996-03-16),
1277# ``I am certain, having lived there for the past decade, that "Truk"
1278# (now properly known as Chuuk) ... is in the time zone GMT+10.''
1279#
1280# Shanks & Pottenger write that Truk switched from UTC+10 to UTC+11
1281# on 1978-10-01; ignore this for now.
1282
1283# From Paul Eggert (1999-10-29):
1284# The Federated States of Micronesia Visitors Board writes in
1285# <a href="http://www.fsmgov.org/info/clocks.html">
1286# The Federated States of Micronesia - Visitor Information
1287# </a> (1999-01-26)
1288# that Truk and Yap are UTC+10, and Ponape and Kosrae are UTC+11.
1289# We don't know when Kosrae switched from UTC+12; assume January 1 for now.
1290
1291
1292# Midway
1293
1294# From Charles T O'Connor, KMTH DJ (1956),
1295# quoted in the KTMH section of the Radio Heritage Collection
1296# <http://radiodx.com/spdxr/KMTH.htm> (2002-12-31):
1297# For the past two months we've been on what is known as Daylight
1298# Saving Time.  This time has put us on air at 5am in the morning,
1299# your time down there in New Zealand.  Starting September 2, 1956
1300# we'll again go back to Standard Time.  This'll mean that we'll go to
1301# air at 6am your time.
1302#
1303# From Paul Eggert (2003-03-23):
1304# We don't know the date of that quote, but we'll guess they
1305# started DST on June 3.  Possibly DST was observed other years
1306# in Midway, but we have no record of it.
1307
1308
1309# Pitcairn
1310
1311# From Rives McDow (1999-11-08):
1312# A Proclamation was signed by the Governor of Pitcairn on the 27th March 1998
1313# with regard to Pitcairn Standard Time.  The Proclamation is as follows.
1314#
1315#	The local time for general purposes in the Islands shall be
1316#	Co-ordinated Universal time minus 8 hours and shall be known
1317#	as Pitcairn Standard Time.
1318#
1319# ... I have also seen Pitcairn listed as UTC minus 9 hours in several
1320# references, and can only assume that this was an error in interpretation
1321# somehow in light of this proclamation.
1322
1323# From Rives McDow (1999-11-09):
1324# The Proclamation regarding Pitcairn time came into effect on 27 April 1998
1325# ... at midnight.
1326
1327# From Howie Phelps (1999-11-10), who talked to a Pitcairner via shortwave:
1328# Betty Christian told me yesterday that their local time is the same as
1329# Pacific Standard Time. They used to be 1/2 hour different from us here in
1330# Sacramento but it was changed a couple of years ago.
1331
1332
1333# Samoa
1334
1335# Howse writes (p 153, citing p 10 of the 1883-11-18 New York Herald)
1336# that in 1879 the King of Samoa decided to change
1337# ``the date in his kingdom from the Antipodean to the American system,
1338# ordaining -- by a masterpiece of diplomatic flattery -- that
1339# the Fourth of July should be celebrated twice in that year.''
1340
1341
1342# Tonga
1343
1344# From Paul Eggert (1996-01-22):
1345# Today's _Wall Street Journal_ (p 1) reports that ``Tonga has been plotting
1346# to sneak ahead of [New Zealanders] by introducing daylight-saving time.''
1347# Since Kiribati has moved the Date Line it's not clear what Tonga will do.
1348
1349# Don Mundell writes in the 1997-02-20 Tonga Chronicle
1350# <a href="http://www.tongatapu.net.to/tonga/homeland/timebegins.htm">
1351# How Tonga became `The Land where Time Begins'
1352# </a>:
1353
1354# Until 1941 Tonga maintained a standard time 50 minutes ahead of NZST
1355# 12 hours and 20 minutes ahead of GMT.  When New Zealand adjusted its
1356# standard time in 1940s, Tonga had the choice of subtracting from its
1357# local time to come on the same standard time as New Zealand or of
1358# advancing its time to maintain the differential of 13 degrees
1359# (approximately 50 minutes ahead of New Zealand time).
1360#
1361# Because His Majesty King Taufa'ahau Tupou IV, then Crown Prince
1362# Tungi, preferred to ensure Tonga's title as the land where time
1363# begins, the Legislative Assembly approved the latter change.
1364#
1365# But some of the older, more conservative members from the outer
1366# islands objected. "If at midnight on Dec. 31, we move ahead 40
1367# minutes, as your Royal Highness wishes, what becomes of the 40
1368# minutes we have lost?"
1369#
1370# The Crown Prince, presented an unanswerable argument: "Remember that
1371# on the World Day of Prayer, you would be the first people on Earth
1372# to say your prayers in the morning."
1373
1374# From Paul Eggert (2006-03-22):
1375# Shanks & Pottenger say the transition was on 1968-10-01; go with Mundell.
1376
1377# From Eric Ulevik (1999-05-03):
1378# Tonga's director of tourism, who is also secretary of the National Millenium
1379# Committee, has a plan to get Tonga back in front.
1380# He has proposed a one-off move to tropical daylight saving for Tonga from
1381# October to March, which has won approval in principle from the Tongan
1382# Government.
1383
1384# From Steffen Thorsen (1999-09-09):
1385# * Tonga will introduce DST in November
1386#
1387# I was given this link by John Letts:
1388# <a href="http://news.bbc.co.uk/hi/english/world/asia-pacific/newsid_424000/424764.stm">
1389# http://news.bbc.co.uk/hi/english/world/asia-pacific/newsid_424000/424764.stm
1390# </a>
1391#
1392# I have not been able to find exact dates for the transition in November
1393# yet. By reading this article it seems like Fiji will be 14 hours ahead
1394# of UTC as well, but as far as I know Fiji will only be 13 hours ahead
1395# (12 + 1 hour DST).
1396
1397# From Arthur David Olson (1999-09-20):
1398# According to <a href="http://www.tongaonline.com/news/sept1799.html">
1399# http://www.tongaonline.com/news/sept1799.html
1400# </a>:
1401# "Daylight Savings Time will take effect on Oct. 2 through April 15, 2000
1402# and annually thereafter from the first Saturday in October through the
1403# third Saturday of April.  Under the system approved by Privy Council on
1404# Sept. 10, clocks must be turned ahead one hour on the opening day and
1405# set back an hour on the closing date."
1406# Alas, no indication of the time of day.
1407
1408# From Rives McDow (1999-10-06):
1409# Tonga started its Daylight Saving on Saturday morning October 2nd at 0200am.
1410# Daylight Saving ends on April 16 at 0300am which is Sunday morning.
1411
1412# From Steffen Thorsen (2000-10-31):
1413# Back in March I found a notice on the website http://www.tongaonline.com
1414# that Tonga changed back to standard time one month early, on March 19
1415# instead of the original reported date April 16. Unfortunately, the article
1416# is no longer available on the site, and I did not make a copy of the
1417# text, and I have forgotten to report it here.
1418# (Original URL was: http://www.tongaonline.com/news/march162000.htm )
1419
1420# From Rives McDow (2000-12-01):
1421# Tonga is observing DST as of 2000-11-04 and will stop on 2001-01-27.
1422
1423# From Sione Moala-Mafi (2001-09-20) via Rives McDow:
1424# At 2:00am on the first Sunday of November, the standard time in the Kingdom
1425# shall be moved forward by one hour to 3:00am.  At 2:00am on the last Sunday
1426# of January the standard time in the Kingdom shall be moved backward by one
1427# hour to 1:00am.
1428
1429# From Pulu 'Anau (2002-11-05):
1430# The law was for 3 years, supposedly to get renewed.  It wasn't.
1431
1432
1433# Wake
1434
1435# From Vernice Anderson, Personal Secretary to Philip Jessup,
1436# US Ambassador At Large (oral history interview, 1971-02-02):
1437#
1438# Saturday, the 14th [of October, 1950] -- ...  The time was all the
1439# more confusing at that point, because we had crossed the
1440# International Date Line, thus getting two Sundays.  Furthermore, we
1441# discovered that Wake Island had two hours of daylight saving time
1442# making calculation of time in Washington difficult if not almost
1443# impossible.
1444#
1445# http://www.trumanlibrary.org/wake/meeting.htm
1446
1447# From Paul Eggert (2003-03-23):
1448# We have no other report of DST in Wake Island, so omit this info for now.
1449
1450###############################################################################
1451
1452# The International Date Line
1453
1454# From Gwillim Law (2000-01-03):
1455#
1456# The International Date Line is not defined by any international standard,
1457# convention, or treaty.  Mapmakers are free to draw it as they please.
1458# Reputable mapmakers will simply ensure that every point of land appears on
1459# the correct side of the IDL, according to the date legally observed there.
1460#
1461# When Kiribati adopted a uniform date in 1995, thereby moving the Phoenix and
1462# Line Islands to the west side of the IDL (or, if you prefer, moving the IDL
1463# to the east side of the Phoenix and Line Islands), I suppose that most
1464# mapmakers redrew the IDL following the boundary of Kiribati.  Even that line
1465# has a rather arbitrary nature.  The straight-line boundaries between Pacific
1466# island nations that are shown on many maps are based on an international
1467# convention, but are not legally binding national borders.... The date is
1468# governed by the IDL; therefore, even on the high seas, there may be some
1469# places as late as fourteen hours later than UTC.  And, since the IDL is not
1470# an international standard, there are some places on the high seas where the
1471# correct date is ambiguous.
1472
1473# From Wikipedia <http://en.wikipedia.org/wiki/Time_zone> (2005-08-31):
1474# Before 1920, all ships kept local apparent time on the high seas by setting
1475# their clocks at night or at the morning sight so that, given the ship's
1476# speed and direction, it would be 12 o'clock when the Sun crossed the ship's
1477# meridian (12 o'clock = local apparent noon).  During 1917, at the
1478# Anglo-French Conference on Time-keeping at Sea, it was recommended that all
1479# ships, both military and civilian, should adopt hourly standard time zones
1480# on the high seas.  Whenever a ship was within the territorial waters of any
1481# nation it would use that nation's standard time.  The captain was permitted
1482# to change his ship's clocks at a time of his choice following his ship's
1483# entry into another zone time--he often chose midnight.  These zones were
1484# adopted by all major fleets between 1920 and 1925 but not by many
1485# independent merchant ships until World War II.
1486
1487# From Paul Eggert, using references suggested by Oscar van Vlijmen
1488# (2005-03-20):
1489#
1490# The American Practical Navigator (2002)
1491# <http://pollux.nss.nima.mil/pubs/pubs_j_apn_sections.html?rid=187>
1492# talks only about the 180-degree meridian with respect to ships in
1493# international waters; it ignores the international date line.
1494