australasia 57 KB

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  1. # <pre>
  2. # @(#)australasia 8.11
  3. # This file is in the public domain, so clarified as of
  4. # 2009-05-17 by Arthur David Olson.
  5. # This file also includes Pacific islands.
  6. # Notes are at the end of this file
  7. ###############################################################################
  8. # Australia
  9. # Please see the notes below for the controversy about "EST" versus "AEST" etc.
  10. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
  11. Rule Aus 1917 only - Jan 1 0:01 1:00 -
  12. Rule Aus 1917 only - Mar 25 2:00 0 -
  13. Rule Aus 1942 only - Jan 1 2:00 1:00 -
  14. Rule Aus 1942 only - Mar 29 2:00 0 -
  15. Rule Aus 1942 only - Sep 27 2:00 1:00 -
  16. Rule Aus 1943 1944 - Mar lastSun 2:00 0 -
  17. Rule Aus 1943 only - Oct 3 2:00 1:00 -
  18. # Go with Whitman and the Australian National Standards Commission, which
  19. # says W Australia didn't use DST in 1943/1944. Ignore Whitman's claim that
  20. # 1944/1945 was just like 1943/1944.
  21. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  22. # Northern Territory
  23. Zone Australia/Darwin 8:43:20 - LMT 1895 Feb
  24. 9:00 - CST 1899 May
  25. 9:30 Aus CST
  26. # Western Australia
  27. #
  28. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
  29. Rule AW 1974 only - Oct lastSun 2:00s 1:00 -
  30. Rule AW 1975 only - Mar Sun>=1 2:00s 0 -
  31. Rule AW 1983 only - Oct lastSun 2:00s 1:00 -
  32. Rule AW 1984 only - Mar Sun>=1 2:00s 0 -
  33. Rule AW 1991 only - Nov 17 2:00s 1:00 -
  34. Rule AW 1992 only - Mar Sun>=1 2:00s 0 -
  35. Rule AW 2006 only - Dec 3 2:00s 1:00 -
  36. Rule AW 2007 2009 - Mar lastSun 2:00s 0 -
  37. Rule AW 2007 2008 - Oct lastSun 2:00s 1:00 -
  38. Zone Australia/Perth 7:43:24 - LMT 1895 Dec
  39. 8:00 Aus WST 1943 Jul
  40. 8:00 AW WST
  41. Zone Australia/Eucla 8:35:28 - LMT 1895 Dec
  42. 8:45 Aus CWST 1943 Jul
  43. 8:45 AW CWST
  44. # Queensland
  45. #
  46. # From Alex Livingston (1996-11-01):
  47. # I have heard or read more than once that some resort islands off the coast
  48. # of Queensland chose to keep observing daylight-saving time even after
  49. # Queensland ceased to.
  50. #
  51. # From Paul Eggert (1996-11-22):
  52. # IATA SSIM (1993-02/1994-09) say that the Holiday Islands (Hayman, Lindeman,
  53. # Hamilton) observed DST for two years after the rest of Queensland stopped.
  54. # Hamilton is the largest, but there is also a Hamilton in Victoria,
  55. # so use Lindeman.
  56. #
  57. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
  58. Rule AQ 1971 only - Oct lastSun 2:00s 1:00 -
  59. Rule AQ 1972 only - Feb lastSun 2:00s 0 -
  60. Rule AQ 1989 1991 - Oct lastSun 2:00s 1:00 -
  61. Rule AQ 1990 1992 - Mar Sun>=1 2:00s 0 -
  62. Rule Holiday 1992 1993 - Oct lastSun 2:00s 1:00 -
  63. Rule Holiday 1993 1994 - Mar Sun>=1 2:00s 0 -
  64. Zone Australia/Brisbane 10:12:08 - LMT 1895
  65. 10:00 Aus EST 1971
  66. 10:00 AQ EST
  67. Zone Australia/Lindeman 9:55:56 - LMT 1895
  68. 10:00 Aus EST 1971
  69. 10:00 AQ EST 1992 Jul
  70. 10:00 Holiday EST
  71. # South Australia
  72. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
  73. Rule AS 1971 1985 - Oct lastSun 2:00s 1:00 -
  74. Rule AS 1986 only - Oct 19 2:00s 1:00 -
  75. Rule AS 1987 2007 - Oct lastSun 2:00s 1:00 -
  76. Rule AS 1972 only - Feb 27 2:00s 0 -
  77. Rule AS 1973 1985 - Mar Sun>=1 2:00s 0 -
  78. Rule AS 1986 1989 - Mar Sun>=15 2:00s 0 -
  79. Rule AS 1990 only - Mar Sun>=18 2:00s 0 -
  80. Rule AS 1991 only - Mar Sun>=1 2:00s 0 -
  81. Rule AS 1992 only - Mar Sun>=18 2:00s 0 -
  82. Rule AS 1993 only - Mar Sun>=1 2:00s 0 -
  83. Rule AS 1994 only - Mar Sun>=18 2:00s 0 -
  84. Rule AS 1995 2005 - Mar lastSun 2:00s 0 -
  85. Rule AS 2006 only - Apr Sun>=1 2:00s 0 -
  86. Rule AS 2007 only - Mar lastSun 2:00s 0 -
  87. Rule AS 2008 max - Apr Sun>=1 2:00s 0 -
  88. Rule AS 2008 max - Oct Sun>=1 2:00s 1:00 -
  89. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  90. Zone Australia/Adelaide 9:14:20 - LMT 1895 Feb
  91. 9:00 - CST 1899 May
  92. 9:30 Aus CST 1971
  93. 9:30 AS CST
  94. # Tasmania
  95. #
  96. # From Paul Eggert (2005-08-16):
  97. # <http://www.bom.gov.au/climate/averages/tables/dst_times.shtml>
  98. # says King Island didn't observe DST from WWII until late 1971.
  99. #
  100. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
  101. Rule AT 1967 only - Oct Sun>=1 2:00s 1:00 -
  102. Rule AT 1968 only - Mar lastSun 2:00s 0 -
  103. Rule AT 1968 1985 - Oct lastSun 2:00s 1:00 -
  104. Rule AT 1969 1971 - Mar Sun>=8 2:00s 0 -
  105. Rule AT 1972 only - Feb lastSun 2:00s 0 -
  106. Rule AT 1973 1981 - Mar Sun>=1 2:00s 0 -
  107. Rule AT 1982 1983 - Mar lastSun 2:00s 0 -
  108. Rule AT 1984 1986 - Mar Sun>=1 2:00s 0 -
  109. Rule AT 1986 only - Oct Sun>=15 2:00s 1:00 -
  110. Rule AT 1987 1990 - Mar Sun>=15 2:00s 0 -
  111. Rule AT 1987 only - Oct Sun>=22 2:00s 1:00 -
  112. Rule AT 1988 1990 - Oct lastSun 2:00s 1:00 -
  113. Rule AT 1991 1999 - Oct Sun>=1 2:00s 1:00 -
  114. Rule AT 1991 2005 - Mar lastSun 2:00s 0 -
  115. Rule AT 2000 only - Aug lastSun 2:00s 1:00 -
  116. Rule AT 2001 max - Oct Sun>=1 2:00s 1:00 -
  117. Rule AT 2006 only - Apr Sun>=1 2:00s 0 -
  118. Rule AT 2007 only - Mar lastSun 2:00s 0 -
  119. Rule AT 2008 max - Apr Sun>=1 2:00s 0 -
  120. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  121. Zone Australia/Hobart 9:49:16 - LMT 1895 Sep
  122. 10:00 - EST 1916 Oct 1 2:00
  123. 10:00 1:00 EST 1917 Feb
  124. 10:00 Aus EST 1967
  125. 10:00 AT EST
  126. Zone Australia/Currie 9:35:28 - LMT 1895 Sep
  127. 10:00 - EST 1916 Oct 1 2:00
  128. 10:00 1:00 EST 1917 Feb
  129. 10:00 Aus EST 1971 Jul
  130. 10:00 AT EST
  131. # Victoria
  132. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
  133. Rule AV 1971 1985 - Oct lastSun 2:00s 1:00 -
  134. Rule AV 1972 only - Feb lastSun 2:00s 0 -
  135. Rule AV 1973 1985 - Mar Sun>=1 2:00s 0 -
  136. Rule AV 1986 1990 - Mar Sun>=15 2:00s 0 -
  137. Rule AV 1986 1987 - Oct Sun>=15 2:00s 1:00 -
  138. Rule AV 1988 1999 - Oct lastSun 2:00s 1:00 -
  139. Rule AV 1991 1994 - Mar Sun>=1 2:00s 0 -
  140. Rule AV 1995 2005 - Mar lastSun 2:00s 0 -
  141. Rule AV 2000 only - Aug lastSun 2:00s 1:00 -
  142. Rule AV 2001 2007 - Oct lastSun 2:00s 1:00 -
  143. Rule AV 2006 only - Apr Sun>=1 2:00s 0 -
  144. Rule AV 2007 only - Mar lastSun 2:00s 0 -
  145. Rule AV 2008 max - Apr Sun>=1 2:00s 0 -
  146. Rule AV 2008 max - Oct Sun>=1 2:00s 1:00 -
  147. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  148. Zone Australia/Melbourne 9:39:52 - LMT 1895 Feb
  149. 10:00 Aus EST 1971
  150. 10:00 AV EST
  151. # New South Wales
  152. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
  153. Rule AN 1971 1985 - Oct lastSun 2:00s 1:00 -
  154. Rule AN 1972 only - Feb 27 2:00s 0 -
  155. Rule AN 1973 1981 - Mar Sun>=1 2:00s 0 -
  156. Rule AN 1982 only - Apr Sun>=1 2:00s 0 -
  157. Rule AN 1983 1985 - Mar Sun>=1 2:00s 0 -
  158. Rule AN 1986 1989 - Mar Sun>=15 2:00s 0 -
  159. Rule AN 1986 only - Oct 19 2:00s 1:00 -
  160. Rule AN 1987 1999 - Oct lastSun 2:00s 1:00 -
  161. Rule AN 1990 1995 - Mar Sun>=1 2:00s 0 -
  162. Rule AN 1996 2005 - Mar lastSun 2:00s 0 -
  163. Rule AN 2000 only - Aug lastSun 2:00s 1:00 -
  164. Rule AN 2001 2007 - Oct lastSun 2:00s 1:00 -
  165. Rule AN 2006 only - Apr Sun>=1 2:00s 0 -
  166. Rule AN 2007 only - Mar lastSun 2:00s 0 -
  167. Rule AN 2008 max - Apr Sun>=1 2:00s 0 -
  168. Rule AN 2008 max - Oct Sun>=1 2:00s 1:00 -
  169. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  170. Zone Australia/Sydney 10:04:52 - LMT 1895 Feb
  171. 10:00 Aus EST 1971
  172. 10:00 AN EST
  173. Zone Australia/Broken_Hill 9:25:48 - LMT 1895 Feb
  174. 10:00 - EST 1896 Aug 23
  175. 9:00 - CST 1899 May
  176. 9:30 Aus CST 1971
  177. 9:30 AN CST 2000
  178. 9:30 AS CST
  179. # Lord Howe Island
  180. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
  181. Rule LH 1981 1984 - Oct lastSun 2:00 1:00 -
  182. Rule LH 1982 1985 - Mar Sun>=1 2:00 0 -
  183. Rule LH 1985 only - Oct lastSun 2:00 0:30 -
  184. Rule LH 1986 1989 - Mar Sun>=15 2:00 0 -
  185. Rule LH 1986 only - Oct 19 2:00 0:30 -
  186. Rule LH 1987 1999 - Oct lastSun 2:00 0:30 -
  187. Rule LH 1990 1995 - Mar Sun>=1 2:00 0 -
  188. Rule LH 1996 2005 - Mar lastSun 2:00 0 -
  189. Rule LH 2000 only - Aug lastSun 2:00 0:30 -
  190. Rule LH 2001 2007 - Oct lastSun 2:00 0:30 -
  191. Rule LH 2006 only - Apr Sun>=1 2:00 0 -
  192. Rule LH 2007 only - Mar lastSun 2:00 0 -
  193. Rule LH 2008 max - Apr Sun>=1 2:00 0 -
  194. Rule LH 2008 max - Oct Sun>=1 2:00 0:30 -
  195. Zone Australia/Lord_Howe 10:36:20 - LMT 1895 Feb
  196. 10:00 - EST 1981 Mar
  197. 10:30 LH LHST
  198. # Australian miscellany
  199. #
  200. # Ashmore Is, Cartier
  201. # no indigenous inhabitants; only seasonal caretakers
  202. # no times are set
  203. #
  204. # Coral Sea Is
  205. # no indigenous inhabitants; only meteorologists
  206. # no times are set
  207. #
  208. # Macquarie
  209. # permanent occupation (scientific station) since 1948;
  210. # sealing and penguin oil station operated 1888/1917
  211. # like Australia/Hobart
  212. # Christmas
  213. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  214. Zone Indian/Christmas 7:02:52 - LMT 1895 Feb
  215. 7:00 - CXT # Christmas Island Time
  216. # Cook Is
  217. # From Shanks & Pottenger:
  218. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
  219. Rule Cook 1978 only - Nov 12 0:00 0:30 HS
  220. Rule Cook 1979 1991 - Mar Sun>=1 0:00 0 -
  221. Rule Cook 1979 1990 - Oct lastSun 0:00 0:30 HS
  222. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  223. Zone Pacific/Rarotonga -10:39:04 - LMT 1901 # Avarua
  224. -10:30 - CKT 1978 Nov 12 # Cook Is Time
  225. -10:00 Cook CK%sT
  226. # Cocos
  227. # These islands were ruled by the Ross family from about 1830 to 1978.
  228. # We don't know when standard time was introduced; for now, we guess 1900.
  229. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  230. Zone Indian/Cocos 6:27:40 - LMT 1900
  231. 6:30 - CCT # Cocos Islands Time
  232. # Fiji
  233. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
  234. Rule Fiji 1998 1999 - Nov Sun>=1 2:00 1:00 S
  235. Rule Fiji 1999 2000 - Feb lastSun 3:00 0 -
  236. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  237. Zone Pacific/Fiji 11:53:40 - LMT 1915 Oct 26 # Suva
  238. 12:00 Fiji FJ%sT # Fiji Time
  239. # French Polynesia
  240. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  241. Zone Pacific/Gambier -8:59:48 - LMT 1912 Oct # Rikitea
  242. -9:00 - GAMT # Gambier Time
  243. Zone Pacific/Marquesas -9:18:00 - LMT 1912 Oct
  244. -9:30 - MART # Marquesas Time
  245. Zone Pacific/Tahiti -9:58:16 - LMT 1912 Oct # Papeete
  246. -10:00 - TAHT # Tahiti Time
  247. # Clipperton (near North America) is administered from French Polynesia;
  248. # it is uninhabited.
  249. # Guam
  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
  255. # Kiribati
  256. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  257. Zone Pacific/Tarawa 11:32:04 - LMT 1901 # Bairiki
  258. 12:00 - GILT # Gilbert Is Time
  259. Zone Pacific/Enderbury -11:24:20 - LMT 1901
  260. -12:00 - PHOT 1979 Oct # Phoenix Is Time
  261. -11:00 - PHOT 1995
  262. 13:00 - PHOT
  263. Zone Pacific/Kiritimati -10:29:20 - LMT 1901
  264. -10:40 - LINT 1979 Oct # Line Is Time
  265. -10:00 - LINT 1995
  266. 14:00 - LINT
  267. # N Mariana Is
  268. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  269. Zone Pacific/Saipan -14:17:00 - LMT 1844 Dec 31
  270. 9:43:00 - LMT 1901
  271. 9:00 - MPT 1969 Oct # N Mariana Is Time
  272. 10:00 - MPT 2000 Dec 23
  273. 10:00 - ChST # Chamorro Standard Time
  274. # Marshall Is
  275. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  276. Zone Pacific/Majuro 11:24:48 - LMT 1901
  277. 11:00 - MHT 1969 Oct # Marshall Islands Time
  278. 12:00 - MHT
  279. Zone Pacific/Kwajalein 11:09:20 - LMT 1901
  280. 11:00 - MHT 1969 Oct
  281. -12:00 - KWAT 1993 Aug 20 # Kwajalein Time
  282. 12:00 - MHT
  283. # Micronesia
  284. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  285. Zone Pacific/Truk 10:07:08 - LMT 1901
  286. 10:00 - TRUT # Truk Time
  287. Zone Pacific/Ponape 10:32:52 - LMT 1901 # Kolonia
  288. 11:00 - PONT # Ponape Time
  289. Zone Pacific/Kosrae 10:51:56 - LMT 1901
  290. 11:00 - KOST 1969 Oct # Kosrae Time
  291. 12:00 - KOST 1999
  292. 11:00 - KOST
  293. # Nauru
  294. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  295. Zone Pacific/Nauru 11:07:40 - LMT 1921 Jan 15 # Uaobe
  296. 11:30 - NRT 1942 Mar 15 # Nauru Time
  297. 9:00 - JST 1944 Aug 15
  298. 11:30 - NRT 1979 May
  299. 12:00 - NRT
  300. # New Caledonia
  301. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
  302. Rule NC 1977 1978 - Dec Sun>=1 0:00 1:00 S
  303. Rule NC 1978 1979 - Feb 27 0:00 0 -
  304. Rule NC 1996 only - Dec 1 2:00s 1:00 S
  305. # Shanks & Pottenger say the following was at 2:00; go with IATA.
  306. Rule NC 1997 only - Mar 2 2:00s 0 -
  307. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  308. Zone Pacific/Noumea 11:05:48 - LMT 1912 Jan 13
  309. 11:00 NC NC%sT
  310. ###############################################################################
  311. # New Zealand
  312. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
  313. Rule NZ 1927 only - Nov 6 2:00 1:00 S
  314. Rule NZ 1928 only - Mar 4 2:00 0 M
  315. Rule NZ 1928 1933 - Oct Sun>=8 2:00 0:30 S
  316. Rule NZ 1929 1933 - Mar Sun>=15 2:00 0 M
  317. Rule NZ 1934 1940 - Apr lastSun 2:00 0 M
  318. Rule NZ 1934 1940 - Sep lastSun 2:00 0:30 S
  319. Rule NZ 1946 only - Jan 1 0:00 0 S
  320. # Since 1957 Chatham has been 45 minutes ahead of NZ, but there's no
  321. # convenient notation for this so we must duplicate the Rule lines.
  322. Rule NZ 1974 only - Nov Sun>=1 2:00s 1:00 D
  323. Rule Chatham 1974 only - Nov Sun>=1 2:45s 1:00 D
  324. Rule NZ 1975 only - Feb lastSun 2:00s 0 S
  325. Rule Chatham 1975 only - Feb lastSun 2:45s 0 S
  326. Rule NZ 1975 1988 - Oct lastSun 2:00s 1:00 D
  327. Rule Chatham 1975 1988 - Oct lastSun 2:45s 1:00 D
  328. Rule NZ 1976 1989 - Mar Sun>=1 2:00s 0 S
  329. Rule Chatham 1976 1989 - Mar Sun>=1 2:45s 0 S
  330. Rule NZ 1989 only - Oct Sun>=8 2:00s 1:00 D
  331. Rule Chatham 1989 only - Oct Sun>=8 2:45s 1:00 D
  332. Rule NZ 1990 2006 - Oct Sun>=1 2:00s 1:00 D
  333. Rule Chatham 1990 2006 - Oct Sun>=1 2:45s 1:00 D
  334. Rule NZ 1990 2007 - Mar Sun>=15 2:00s 0 S
  335. Rule Chatham 1990 2007 - Mar Sun>=15 2:45s 0 S
  336. Rule NZ 2007 max - Sep lastSun 2:00s 1:00 D
  337. Rule Chatham 2007 max - Sep lastSun 2:45s 1:00 D
  338. Rule NZ 2008 max - Apr Sun>=1 2:00s 0 S
  339. Rule Chatham 2008 max - Apr Sun>=1 2:45s 0 S
  340. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  341. Zone Pacific/Auckland 11:39:04 - LMT 1868 Nov 2
  342. 11:30 NZ NZ%sT 1946 Jan 1
  343. 12:00 NZ NZ%sT
  344. Zone Pacific/Chatham 12:13:48 - LMT 1957 Jan 1
  345. 12:45 Chatham CHA%sT
  346. # Auckland Is
  347. # uninhabited; Maori and Moriori, colonial settlers, pastoralists, sealers,
  348. # and scientific personnel have wintered
  349. # Campbell I
  350. # minor whaling stations operated 1909/1914
  351. # scientific station operated 1941/1995;
  352. # previously whalers, sealers, pastoralists, and scientific personnel wintered
  353. # was probably like Pacific/Auckland
  354. ###############################################################################
  355. # Niue
  356. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  357. Zone Pacific/Niue -11:19:40 - LMT 1901 # Alofi
  358. -11:20 - NUT 1951 # Niue Time
  359. -11:30 - NUT 1978 Oct 1
  360. -11:00 - NUT
  361. # Norfolk
  362. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  363. Zone Pacific/Norfolk 11:11:52 - LMT 1901 # Kingston
  364. 11:12 - NMT 1951 # Norfolk Mean Time
  365. 11:30 - NFT # Norfolk Time
  366. # Palau (Belau)
  367. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  368. Zone Pacific/Palau 8:57:56 - LMT 1901 # Koror
  369. 9:00 - PWT # Palau Time
  370. # Papua New Guinea
  371. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  372. Zone Pacific/Port_Moresby 9:48:40 - LMT 1880
  373. 9:48:32 - PMMT 1895 # Port Moresby Mean Time
  374. 10:00 - PGT # Papua New Guinea Time
  375. # Pitcairn
  376. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  377. Zone Pacific/Pitcairn -8:40:20 - LMT 1901 # Adamstown
  378. -8:30 - PNT 1998 Apr 27 00:00
  379. -8:00 - PST # Pitcairn Standard Time
  380. # American Samoa
  381. Zone Pacific/Pago_Pago 12:37:12 - LMT 1879 Jul 5
  382. -11:22:48 - LMT 1911
  383. -11:30 - SAMT 1950 # Samoa Time
  384. -11:00 - NST 1967 Apr # N=Nome
  385. -11:00 - BST 1983 Nov 30 # B=Bering
  386. -11:00 - SST # S=Samoa
  387. # Samoa
  388. Zone Pacific/Apia 12:33:04 - LMT 1879 Jul 5
  389. -11:26:56 - LMT 1911
  390. -11:30 - SAMT 1950 # Samoa Time
  391. -11:00 - WST # Samoa Time
  392. # Solomon Is
  393. # excludes Bougainville, for which see Papua New Guinea
  394. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  395. Zone Pacific/Guadalcanal 10:39:48 - LMT 1912 Oct # Honiara
  396. 11:00 - SBT # Solomon Is Time
  397. # Tokelau Is
  398. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  399. Zone Pacific/Fakaofo -11:24:56 - LMT 1901
  400. -10:00 - TKT # Tokelau Time
  401. # Tonga
  402. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
  403. Rule Tonga 1999 only - Oct 7 2:00s 1:00 S
  404. Rule Tonga 2000 only - Mar 19 2:00s 0 -
  405. Rule Tonga 2000 2001 - Nov Sun>=1 2:00 1:00 S
  406. Rule Tonga 2001 2002 - Jan lastSun 2:00 0 -
  407. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  408. Zone Pacific/Tongatapu 12:19:20 - LMT 1901
  409. 12:20 - TOT 1941 # Tonga Time
  410. 13:00 - TOT 1999
  411. 13:00 Tonga TO%sT
  412. # Tuvalu
  413. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  414. Zone Pacific/Funafuti 11:56:52 - LMT 1901
  415. 12:00 - TVT # Tuvalu Time
  416. # US minor outlying islands
  417. # Howland, Baker
  418. # Howland was mined for guano by American companies 1857-1878 and British
  419. # 1886-1891; Baker was similar but exact dates are not known.
  420. # Inhabited by civilians 1935-1942; U.S. military bases 1943-1944;
  421. # uninhabited thereafter.
  422. # Howland observed Hawaii Standard Time (UTC-10:30) in 1937;
  423. # see page 206 of Elgen M. Long and Marie K. Long,
  424. # Amelia Earhart: the Mystery Solved, Simon & Schuster (2000).
  425. # So most likely Howland and Baker observed Hawaii Time from 1935
  426. # until they were abandoned after the war.
  427. # Jarvis
  428. # Mined for guano by American companies 1857-1879 and British 1883?-1891?.
  429. # Inhabited by civilians 1935-1942; IGY scientific base 1957-1958;
  430. # uninhabited thereafter.
  431. # no information; was probably like Pacific/Kiritimati
  432. # Johnston
  433. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  434. Zone Pacific/Johnston -10:00 - HST
  435. # Kingman
  436. # uninhabited
  437. # Midway
  438. #
  439. # From Mark Brader (2005-01-23):
  440. # [Fallacies and Fantasies of Air Transport History, by R.E.G. Davies,
  441. # published 1994 by Paladwr Press, McLean, VA, USA; ISBN 0-9626483-5-3]
  442. # reproduced a Pan American Airways timeables from 1936, for their weekly
  443. # "Orient Express" flights between San Francisco and Manila, and connecting
  444. # flights to Chicago and the US East Coast. As it uses some time zone
  445. # designations that I've never seen before:....
  446. # Fri. 6:30A Lv. HONOLOLU (Pearl Harbor), H.I. H.L.T. Ar. 5:30P Sun.
  447. # " 3:00P Ar. MIDWAY ISLAND . . . . . . . . . M.L.T. Lv. 6:00A "
  448. #
  449. Zone Pacific/Midway -11:49:28 - LMT 1901
  450. -11:00 - NST 1956 Jun 3
  451. -11:00 1:00 NDT 1956 Sep 2
  452. -11:00 - NST 1967 Apr # N=Nome
  453. -11:00 - BST 1983 Nov 30 # B=Bering
  454. -11:00 - SST # S=Samoa
  455. # Palmyra
  456. # uninhabited since World War II; was probably like Pacific/Kiritimati
  457. # Wake
  458. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  459. Zone Pacific/Wake 11:06:28 - LMT 1901
  460. 12:00 - WAKT # Wake Time
  461. # Vanuatu
  462. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
  463. Rule Vanuatu 1983 only - Sep 25 0:00 1:00 S
  464. Rule Vanuatu 1984 1991 - Mar Sun>=23 0:00 0 -
  465. Rule Vanuatu 1984 only - Oct 23 0:00 1:00 S
  466. Rule Vanuatu 1985 1991 - Sep Sun>=23 0:00 1:00 S
  467. Rule Vanuatu 1992 1993 - Jan Sun>=23 0:00 0 -
  468. Rule Vanuatu 1992 only - Oct Sun>=23 0:00 1:00 S
  469. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  470. Zone Pacific/Efate 11:13:16 - LMT 1912 Jan 13 # Vila
  471. 11:00 Vanuatu VU%sT # Vanuatu Time
  472. # Wallis and Futuna
  473. # Zone NAME GMTOFF RULES FORMAT [UNTIL]
  474. Zone Pacific/Wallis 12:15:20 - LMT 1901
  475. 12:00 - WFT # Wallis & Futuna Time
  476. ###############################################################################
  477. # NOTES
  478. # This data is by no means authoritative; if you think you know better,
  479. # go ahead and edit the file (and please send any changes to
  480. # tz@elsie.nci.nih.gov for general use in the future).
  481. # From Paul Eggert (2006-03-22):
  482. # A good source for time zone historical data outside the U.S. is
  483. # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
  484. # San Diego: ACS Publications, Inc. (2003).
  485. #
  486. # Gwillim Law writes that a good source
  487. # for recent time zone data is the International Air Transport
  488. # Association's Standard Schedules Information Manual (IATA SSIM),
  489. # published semiannually. Law sent in several helpful summaries
  490. # of the IATA's data after 1990.
  491. #
  492. # Except where otherwise noted, Shanks & Pottenger is the source for
  493. # entries through 1990, and IATA SSIM is the source for entries afterwards.
  494. #
  495. # Another source occasionally used is Edward W. Whitman, World Time Differences,
  496. # Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), which
  497. # I found in the UCLA library.
  498. #
  499. # A reliable and entertaining source about time zones is
  500. # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
  501. #
  502. # I invented the abbreviations marked `*' in the following table;
  503. # the rest are from earlier versions of this file, or from other sources.
  504. # Corrections are welcome!
  505. # std dst
  506. # LMT Local Mean Time
  507. # 8:00 WST WST Western Australia
  508. # 8:45 CWST CWST Central Western Australia*
  509. # 9:00 JST Japan
  510. # 9:30 CST CST Central Australia
  511. # 10:00 EST EST Eastern Australia
  512. # 10:00 ChST Chamorro
  513. # 10:30 LHST LHST Lord Howe*
  514. # 11:30 NZMT NZST New Zealand through 1945
  515. # 12:00 NZST NZDT New Zealand 1946-present
  516. # 12:45 CHAST CHADT Chatham*
  517. # -11:00 SST Samoa
  518. # -10:00 HST Hawaii
  519. # - 8:00 PST Pitcairn*
  520. #
  521. # See the `northamerica' file for Hawaii.
  522. # See the `southamerica' file for Easter I and the Galapagos Is.
  523. ###############################################################################
  524. # Australia
  525. # From Paul Eggert (2005-12-08):
  526. # <a href="http://www.bom.gov.au/climate/averages/tables/dst_times.shtml">
  527. # Implementation Dates of Daylight Saving Time within Australia
  528. # </a> summarizes daylight saving issues in Australia.
  529. # From Arthur David Olson (2005-12-12):
  530. # <a href="http://www.lawlink.nsw.gov.au/lawlink/Corporate/ll_agdinfo.nsf/pages/community_relations_daylight_saving">
  531. # Lawlink NSW:Daylight Saving in New South Wales
  532. # </a> covers New South Wales in particular.
  533. # From John Mackin (1991-03-06):
  534. # We in Australia have _never_ referred to DST as `daylight' time.
  535. # It is called `summer' time. Now by a happy coincidence, `summer'
  536. # and `standard' happen to start with the same letter; hence, the
  537. # abbreviation does _not_ change...
  538. # The legislation does not actually define abbreviations, at least
  539. # in this State, but the abbreviation is just commonly taken to be the
  540. # initials of the phrase, and the legislation here uniformly uses
  541. # the phrase `summer time' and does not use the phrase `daylight
  542. # time'.
  543. # Announcers on the Commonwealth radio network, the ABC (for Australian
  544. # Broadcasting Commission), use the phrases `Eastern Standard Time'
  545. # or `Eastern Summer Time'. (Note, though, that as I say in the
  546. # current australasia file, there is really no such thing.) Announcers
  547. # on its overseas service, Radio Australia, use the same phrases
  548. # prefixed by the word `Australian' when referring to local times;
  549. # time announcements on that service, naturally enough, are made in UTC.
  550. # From Arthur David Olson (1992-03-08):
  551. # Given the above, what's chosen for year-round use is:
  552. # CST for any place operating at a GMTOFF of 9:30
  553. # WST for any place operating at a GMTOFF of 8:00
  554. # EST for any place operating at a GMTOFF of 10:00
  555. # From Chuck Soper (2006-06-01):
  556. # I recently found this Australian government web page on time zones:
  557. # <http://www.australia.gov.au/about-australia-13time>
  558. # And this government web page lists time zone names and abbreviations:
  559. # <http://www.bom.gov.au/climate/averages/tables/daysavtm.shtml>
  560. # From Paul Eggert (2001-04-05), summarizing a long discussion about "EST"
  561. # versus "AEST" etc.:
  562. #
  563. # I see the following points of dispute:
  564. #
  565. # * How important are unique time zone abbreviations?
  566. #
  567. # Here I tend to agree with the point (most recently made by Chris
  568. # Newman) that unique abbreviations should not be essential for proper
  569. # operation of software. We have other instances of ambiguity
  570. # (e.g. "IST" denoting both "Israel Standard Time" and "Indian
  571. # Standard Time"), and they are not likely to go away any time soon.
  572. # In the old days, some software mistakenly relied on unique
  573. # abbreviations, but this is becoming less true with time, and I don't
  574. # think it's that important to cater to such software these days.
  575. #
  576. # On the other hand, there is another motivation for unambiguous
  577. # abbreviations: it cuts down on human confusion. This is
  578. # particularly true for Australia, where "EST" can mean one thing for
  579. # time T and a different thing for time T plus 1 second.
  580. #
  581. # * Does the relevant legislation indicate which abbreviations should be used?
  582. #
  583. # Here I tend to think that things are a mess, just as they are in
  584. # many other countries. We Americans are currently disagreeing about
  585. # which abbreviation to use for the newly legislated Chamorro Standard
  586. # Time, for example.
  587. #
  588. # Personally, I would prefer to use common practice; I would like to
  589. # refer to legislation only for examples of common practice, or as a
  590. # tiebreaker.
  591. #
  592. # * Do Australians more often use "Eastern Daylight Time" or "Eastern
  593. # Summer Time"? Do they typically prefix the time zone names with
  594. # the word "Australian"?
  595. #
  596. # My own impression is that both "Daylight Time" and "Summer Time" are
  597. # common and are widely understood, but that "Summer Time" is more
  598. # popular; and that the leading "A" is also common but is omitted more
  599. # often than not. I just used AltaVista advanced search and got the
  600. # following count of page hits:
  601. #
  602. # 1,103 "Eastern Summer Time" AND domain:au
  603. # 971 "Australian Eastern Summer Time" AND domain:au
  604. # 613 "Eastern Daylight Time" AND domain:au
  605. # 127 "Australian Eastern Daylight Time" AND domain:au
  606. #
  607. # Here "Summer" seems quite a bit more popular than "Daylight",
  608. # particularly when we know the time zone is Australian and not US,
  609. # say. The "Australian" prefix seems to be popular for Eastern Summer
  610. # Time, but unpopular for Eastern Daylight Time.
  611. #
  612. # For abbreviations, tools like AltaVista are less useful because of
  613. # ambiguity. Many hits are not really time zones, unfortunately, and
  614. # many hits denote US time zones and not Australian ones. But here
  615. # are the hit counts anyway:
  616. #
  617. # 161,304 "EST" and domain:au
  618. # 25,156 "EDT" and domain:au
  619. # 18,263 "AEST" and domain:au
  620. # 10,416 "AEDT" and domain:au
  621. #
  622. # 14,538 "CST" and domain:au
  623. # 5,728 "CDT" and domain:au
  624. # 176 "ACST" and domain:au
  625. # 29 "ACDT" and domain:au
  626. #
  627. # 7,539 "WST" and domain:au
  628. # 68 "AWST" and domain:au
  629. #
  630. # This data suggest that Australians tend to omit the "A" prefix in
  631. # practice. The situation for "ST" versus "DT" is less clear, given
  632. # the ambiguities involved.
  633. #
  634. # * How do Australians feel about the abbreviations in the tz database?
  635. #
  636. # If you just count Australians on this list, I count 2 in favor and 3
  637. # against. One of the "against" votes (David Keegel) counseled delay,
  638. # saying that both AEST/AEDT and EST/EST are widely used and
  639. # understood in Australia.
  640. # From Paul Eggert (1995-12-19):
  641. # Shanks & Pottenger report 2:00 for all autumn changes in Australia and NZ.
  642. # Mark Prior writes that his newspaper
  643. # reports that NSW's fall 1995 change will occur at 2:00,
  644. # but Robert Elz says it's been 3:00 in Victoria since 1970
  645. # and perhaps the newspaper's `2:00' is referring to standard time.
  646. # For now we'll continue to assume 2:00s for changes since 1960.
  647. # From Eric Ulevik (1998-01-05):
  648. #
  649. # Here are some URLs to Australian time legislation. These URLs are stable,
  650. # and should probably be included in the data file. There are probably more
  651. # relevant entries in this database.
  652. #
  653. # NSW (including LHI and Broken Hill):
  654. # <a href="http://www.austlii.edu.au/au/legis/nsw/consol_act/sta1987137/index.html">
  655. # Standard Time Act 1987 (updated 1995-04-04)
  656. # </a>
  657. # ACT
  658. # <a href="http://www.austlii.edu.au/au/legis/act/consol_act/stasta1972279/index.html">
  659. # Standard Time and Summer Time Act 1972
  660. # </a>
  661. # SA
  662. # <a href="http://www.austlii.edu.au/au/legis/sa/consol_act/sta1898137/index.html">
  663. # Standard Time Act, 1898
  664. # </a>
  665. # From David Grosz (2005-06-13):
  666. # It was announced last week that Daylight Saving would be extended by
  667. # one week next year to allow for the 2006 Commonwealth Games.
  668. # Daylight Saving is now to end for next year only on the first Sunday
  669. # in April instead of the last Sunday in March.
  670. #
  671. # From Gwillim Law (2005-06-14):
  672. # I did some Googling and found that all of those states (and territory) plan
  673. # to extend DST together in 2006.
  674. # ACT: http://www.cmd.act.gov.au/mediareleases/fileread.cfm?file=86.txt
  675. # New South Wales: http://www.thecouriermail.news.com.au/common/story_page/0,5936,15538869%255E1702,00.html
  676. # South Australia: http://www.news.com.au/story/0,10117,15555031-1246,00.html
  677. # Tasmania: http://www.media.tas.gov.au/release.php?id=14772
  678. # Victoria: I wasn't able to find anything separate, but the other articles
  679. # allude to it.
  680. # But not Queensland
  681. # http://www.news.com.au/story/0,10117,15564030-1248,00.html.
  682. # Northern Territory
  683. # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
  684. # # The NORTHERN TERRITORY.. [ Courtesy N.T. Dept of the Chief Minister ]
  685. # # [ Nov 1990 ]
  686. # # N.T. have never utilised any DST due to sub-tropical/tropical location.
  687. # ...
  688. # Zone Australia/North 9:30 - CST
  689. # From Bradley White (1991-03-04):
  690. # A recent excerpt from an Australian newspaper...
  691. # the Northern Territory do[es] not have daylight saving.
  692. # Western Australia
  693. # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
  694. # # The state of WESTERN AUSTRALIA.. [ Courtesy W.A. dept Premier+Cabinet ]
  695. # # [ Nov 1990 ]
  696. # # W.A. suffers from a great deal of public and political opposition to
  697. # # DST in principle. A bill is brought before parliament in most years, but
  698. # # usually defeated either in the upper house, or in party caucus
  699. # # before reaching parliament.
  700. # ...
  701. # Zone Australia/West 8:00 AW %sST
  702. # ...
  703. # Rule AW 1974 only - Oct lastSun 2:00 1:00 D
  704. # Rule AW 1975 only - Mar Sun>=1 3:00 0 W
  705. # Rule AW 1983 only - Oct lastSun 2:00 1:00 D
  706. # Rule AW 1984 only - Mar Sun>=1 3:00 0 W
  707. # From Bradley White (1991-03-04):
  708. # A recent excerpt from an Australian newspaper...
  709. # Western Australia...do[es] not have daylight saving.
  710. # From John D. Newman via Bradley White (1991-11-02):
  711. # Western Australia is still on "winter time". Some DH in Sydney
  712. # rang me at home a few days ago at 6.00am. (He had just arrived at
  713. # work at 9.00am.)
  714. # W.A. is switching to Summer Time on Nov 17th just to confuse
  715. # everybody again.
  716. # From Arthur David Olson (1992-03-08):
  717. # The 1992 ending date used in the rules is a best guess;
  718. # it matches what was used in the past.
  719. # <a href="http://www.bom.gov.au/faq/faqgen.htm">
  720. # The Australian Bureau of Meteorology FAQ
  721. # </a> (1999-09-27) writes that Giles Meteorological Station uses
  722. # South Australian time even though it's located in Western Australia.
  723. # Queensland
  724. # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
  725. # # The state of QUEENSLAND.. [ Courtesy Qld. Dept Premier Econ&Trade Devel ]
  726. # # [ Dec 1990 ]
  727. # ...
  728. # Zone Australia/Queensland 10:00 AQ %sST
  729. # ...
  730. # Rule AQ 1971 only - Oct lastSun 2:00 1:00 D
  731. # Rule AQ 1972 only - Feb lastSun 3:00 0 E
  732. # Rule AQ 1989 max - Oct lastSun 2:00 1:00 D
  733. # Rule AQ 1990 max - Mar Sun>=1 3:00 0 E
  734. # From Bradley White (1989-12-24):
  735. # "Australia/Queensland" now observes daylight time (i.e. from
  736. # October 1989).
  737. # From Bradley White (1991-03-04):
  738. # A recent excerpt from an Australian newspaper...
  739. # ...Queensland...[has] agreed to end daylight saving
  740. # at 3am tomorrow (March 3)...
  741. # From John Mackin (1991-03-06):
  742. # I can certainly confirm for my part that Daylight Saving in NSW did in fact
  743. # end on Sunday, 3 March. I don't know at what hour, though. (It surprised
  744. # me.)
  745. # From Bradley White (1992-03-08):
  746. # ...there was recently a referendum in Queensland which resulted
  747. # in the experimental daylight saving system being abandoned. So, ...
  748. # ...
  749. # Rule QLD 1989 1991 - Oct lastSun 2:00 1:00 D
  750. # Rule QLD 1990 1992 - Mar Sun>=1 3:00 0 S
  751. # ...
  752. # From Arthur David Olson (1992-03-08):
  753. # The chosen rules the union of the 1971/1972 change and the 1989-1992 changes.
  754. # From Christopher Hunt (2006-11-21), after an advance warning
  755. # from Jesper Norgaard Welen (2006-11-01):
  756. # WA are trialing DST for three years.
  757. # <http://www.parliament.wa.gov.au/parliament/bills.nsf/9A1B183144403DA54825721200088DF1/$File/Bill175-1B.pdf>
  758. # From Rives McDow (2002-04-09):
  759. # The most interesting region I have found consists of three towns on the
  760. # southern coast.... South Australia observes daylight saving time; Western
  761. # Australia does not. The two states are one and a half hours apart. The
  762. # residents decided to forget about this nonsense of changing the clock so
  763. # much and set the local time 20 hours and 45 minutes from the
  764. # international date line, or right in the middle of the time of South
  765. # Australia and Western Australia....
  766. #
  767. # From Paul Eggert (2002-04-09):
  768. # This is confirmed by the section entitled
  769. # "What's the deal with time zones???" in
  770. # <http://www.earthsci.unimelb.edu.au/~awatkins/null.html>.
  771. #
  772. # From Alex Livingston (2006-12-07):
  773. # ... it was just on four years ago that I drove along the Eyre Highway,
  774. # which passes through eastern Western Australia close to the southern
  775. # coast of the continent.
  776. #
  777. # I paid particular attention to the time kept there. There can be no
  778. # dispute that UTC+08:45 was considered "the time" from the border
  779. # village just inside the border with South Australia to as far west
  780. # as just east of Caiguna. There can also be no dispute that Eucla is
  781. # the largest population centre in this zone....
  782. #
  783. # Now that Western Australia is observing daylight saving, the
  784. # question arose whether this part of the state would follow suit. I
  785. # just called the border village and confirmed that indeed they have,
  786. # meaning that they are now observing UTC+09:45.
  787. #
  788. # (2006-12-09):
  789. # I personally doubt that either experimentation with daylight saving
  790. # in WA or its introduction in SA had anything to do with the genesis
  791. # of this time zone. My hunch is that it's been around since well
  792. # before 1975. I remember seeing it noted on road maps decades ago.
  793. # From Paul Eggert (2006-12-15):
  794. # For lack of better info, assume the tradition dates back to the
  795. # introduction of standard time in 1895.
  796. # southeast Australia
  797. #
  798. # From Paul Eggert (2007-07-23):
  799. # Starting autumn 2008 Victoria, NSW, South Australia, Tasmania and the ACT
  800. # end DST the first Sunday in April and start DST the first Sunday in October.
  801. # http://www.theage.com.au/news/national/daylight-savings-to-span-six-months/2007/06/27/1182623966703.html
  802. # South Australia
  803. # From Bradley White (1991-03-04):
  804. # A recent excerpt from an Australian newspaper...
  805. # ...South Australia...[has] agreed to end daylight saving
  806. # at 3am tomorrow (March 3)...
  807. # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
  808. # # The state of SOUTH AUSTRALIA....[ Courtesy of S.A. Dept of Labour ]
  809. # # [ Nov 1990 ]
  810. # ...
  811. # Zone Australia/South 9:30 AS %sST
  812. # ...
  813. # Rule AS 1971 max - Oct lastSun 2:00 1:00 D
  814. # Rule AS 1972 1985 - Mar Sun>=1 3:00 0 C
  815. # Rule AS 1986 1990 - Mar Sun>=15 3:00 0 C
  816. # Rule AS 1991 max - Mar Sun>=1 3:00 0 C
  817. # From Bradley White (1992-03-11):
  818. # Recent correspondence with a friend in Adelaide
  819. # contained the following exchange: "Due to the Adelaide Festival,
  820. # South Australia delays setting back our clocks for a few weeks."
  821. # From Robert Elz (1992-03-13):
  822. # I heard that apparently (or at least, it appears that)
  823. # South Aus will have an extra 3 weeks daylight saving every even
  824. # numbered year (from 1990). That's when the Adelaide Festival
  825. # is on...
  826. # From Robert Elz (1992-03-16, 00:57:07 +1000):
  827. # DST didn't end in Adelaide today (yesterday)....
  828. # But whether it's "4th Sunday" or "2nd last Sunday" I have no idea whatever...
  829. # (it's just as likely to be "the Sunday we pick for this year"...).
  830. # From Bradley White (1994-04-11):
  831. # If Sun, 15 March, 1992 was at +1030 as kre asserts, but yet Sun, 20 March,
  832. # 1994 was at +0930 as John Connolly's customer seems to assert, then I can
  833. # only conclude that the actual rule is more complicated....
  834. # From John Warburton (1994-10-07):
  835. # The new Daylight Savings dates for South Australia ...
  836. # was gazetted in the Government Hansard on Sep 26 1994....
  837. # start on last Sunday in October and end in last sunday in March.
  838. # From Paul Eggert (2007-07-23):
  839. # See "southeast Australia" above for 2008 and later.
  840. # Tasmania
  841. # The rules for 1967 through 1991 were reported by George Shepherd
  842. # via Simon Woodhead via Robert Elz (1991-03-06):
  843. # # The state of TASMANIA.. [Courtesy Tasmanian Dept of Premier + Cabinet ]
  844. # # [ Nov 1990 ]
  845. # From Bill Hart via Guy Harris (1991-10-10):
  846. # Oh yes, the new daylight savings rules are uniquely tasmanian, we have
  847. # 6 weeks a year now when we are out of sync with the rest of Australia
  848. # (but nothing new about that).
  849. # From Alex Livingston (1999-10-04):
  850. # I heard on the ABC (Australian Broadcasting Corporation) radio news on the
  851. # (long) weekend that Tasmania, which usually goes its own way in this regard,
  852. # has decided to join with most of NSW, the ACT, and most of Victoria
  853. # (Australia) and start daylight saving on the last Sunday in August in 2000
  854. # instead of the first Sunday in October.
  855. # Sim Alam (2000-07-03) reported a legal citation for the 2000/2001 rules:
  856. # http://www.thelaw.tas.gov.au/fragview/42++1968+GS3A@EN+2000070300
  857. # From Paul Eggert (2007-07-23):
  858. # See "southeast Australia" above for 2008 and later.
  859. # Victoria
  860. # The rules for 1971 through 1991 were reported by George Shepherd
  861. # via Simon Woodhead via Robert Elz (1991-03-06):
  862. # # The state of VICTORIA.. [ Courtesy of Vic. Dept of Premier + Cabinet ]
  863. # # [ Nov 1990 ]
  864. # From Scott Harrington (2001-08-29):
  865. # On KQED's "City Arts and Lectures" program last night I heard an
  866. # interesting story about daylight savings time. Dr. John Heilbron was
  867. # discussing his book "The Sun in the Church: Cathedrals as Solar
  868. # Observatories"[1], and in particular the Shrine of Remembrance[2] located
  869. # in Melbourne, Australia.
  870. #
  871. # Apparently the shrine's main purpose is a beam of sunlight which
  872. # illuminates a special spot on the floor at the 11th hour of the 11th day
  873. # of the 11th month (Remembrance Day) every year in memory of Australia's
  874. # fallen WWI soldiers. And if you go there on Nov. 11, at 11am local time,
  875. # you will indeed see the sunbeam illuminate the special spot at the
  876. # expected time.
  877. #
  878. # However, that is only because of some special mirror contraption that had
  879. # to be employed, since due to daylight savings time, the true solar time of
  880. # the remembrance moment occurs one hour later (or earlier?). Perhaps
  881. # someone with more information on this jury-rig can tell us more.
  882. #
  883. # [1] http://www.hup.harvard.edu/catalog/HEISUN.html
  884. # [2] http://www.shrine.org.au
  885. # From Paul Eggert (2007-07-23):
  886. # See "southeast Australia" above for 2008 and later.
  887. # New South Wales
  888. # From Arthur David Olson:
  889. # New South Wales and subjurisdictions have their own ideas of a fun time.
  890. # Based on law library research by John Mackin,
  891. # who notes:
  892. # In Australia, time is not legislated federally, but rather by the
  893. # individual states. Thus, while such terms as ``Eastern Standard Time''
  894. # [I mean, of course, Australian EST, not any other kind] are in common
  895. # use, _they have NO REAL MEANING_, as they are not defined in the
  896. # legislation. This is very important to understand.
  897. # I have researched New South Wales time only...
  898. # From Eric Ulevik (1999-05-26):
  899. # DST will start in NSW on the last Sunday of August, rather than the usual
  900. # October in 2000. [See: Matthew Moore,
  901. # <a href="http://www.smh.com.au/news/9905/26/pageone/pageone4.html">
  902. # Two months more daylight saving
  903. # </a>
  904. # Sydney Morning Herald (1999-05-26).]
  905. # From Paul Eggert (1999-09-27):
  906. # See the following official NSW source:
  907. # <a href="http://dir.gis.nsw.gov.au/cgi-bin/genobject/document/other/daylightsaving/tigGmZ">
  908. # Daylight Saving in New South Wales.
  909. # </a>
  910. #
  911. # Narrabri Shire (NSW) council has announced it will ignore the extension of
  912. # daylight saving next year. See:
  913. # <a href="http://abc.net.au/news/regionals/neweng/monthly/regeng-22jul1999-1.htm">
  914. # Narrabri Council to ignore daylight saving
  915. # </a> (1999-07-22). For now, we'll wait to see if this really happens.
  916. #
  917. # Victoria will following NSW. See:
  918. # <a href="http://abc.net.au/local/news/olympics/1999/07/item19990728112314_1.htm">
  919. # Vic to extend daylight saving
  920. # </a> (1999-07-28).
  921. #
  922. # However, South Australia rejected the DST request. See:
  923. # <a href="http://abc.net.au/news/olympics/1999/07/item19990719151754_1.htm">
  924. # South Australia rejects Olympics daylight savings request
  925. # </a> (1999-07-19).
  926. #
  927. # Queensland also will not observe DST for the Olympics. See:
  928. # <a href="http://abc.net.au/news/olympics/1999/06/item19990601114608_1.htm">
  929. # Qld says no to daylight savings for Olympics
  930. # </a> (1999-06-01), which quotes Queensland Premier Peter Beattie as saying
  931. # ``Look you've got to remember in my family when this came up last time
  932. # I voted for it, my wife voted against it and she said to me it's all very
  933. # well for you, you don't have to worry about getting the children out of
  934. # bed, getting them to school, getting them to sleep at night.
  935. # I've been through all this argument domestically...my wife rules.''
  936. #
  937. # Broken Hill will stick with South Australian time in 2000. See:
  938. # <a href="http://abc.net.au/news/regionals/brokenh/monthly/regbrok-21jul1999-6.htm">
  939. # Broken Hill to be behind the times
  940. # </a> (1999-07-21).
  941. # IATA SSIM (1998-09) says that the spring 2000 change for Australian
  942. # Capital Territory, New South Wales except Lord Howe Island and Broken
  943. # Hill, and Victoria will be August 27, presumably due to the Sydney Olympics.
  944. # From Eric Ulevik, referring to Sydney's Sun Herald (2000-08-13), page 29:
  945. # The Queensland Premier Peter Beattie is encouraging northern NSW
  946. # towns to use Queensland time.
  947. # From Paul Eggert (2007-07-23):
  948. # See "southeast Australia" above for 2008 and later.
  949. # Yancowinna
  950. # From John Mackin (1989-01-04):
  951. # `Broken Hill' means the County of Yancowinna.
  952. # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
  953. # # YANCOWINNA.. [ Confirmation courtesy of Broken Hill Postmaster ]
  954. # # [ Dec 1990 ]
  955. # ...
  956. # # Yancowinna uses Central Standard Time, despite [its] location on the
  957. # # New South Wales side of the S.A. border. Most business and social dealings
  958. # # are with CST zones, therefore CST is legislated by local government
  959. # # although the switch to Summer Time occurs in line with N.S.W. There have
  960. # # been years when this did not apply, but the historical data is not
  961. # # presently available.
  962. # Zone Australia/Yancowinna 9:30 AY %sST
  963. # ...
  964. # Rule AY 1971 1985 - Oct lastSun 2:00 1:00 D
  965. # Rule AY 1972 only - Feb lastSun 3:00 0 C
  966. # [followed by other Rules]
  967. # Lord Howe Island
  968. # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
  969. # LHI... [ Courtesy of Pauline Van Winsen ]
  970. # [ Dec 1990 ]
  971. # Lord Howe Island is located off the New South Wales coast, and is half an
  972. # hour ahead of NSW time.
  973. # From James Lonergan, Secretary, Lord Howe Island Board (2000-01-27):
  974. # Lord Howe Island summer time in 2000/2001 will commence on the same
  975. # date as the rest of NSW (i.e. 2000-08-27). For your information the
  976. # Lord Howe Island Board (controlling authority for the Island) is
  977. # seeking the community's views on various options for summer time
  978. # arrangements on the Island, e.g. advance clocks by 1 full hour
  979. # instead of only 30 minutes. Dependant on the wishes of residents
  980. # the Board may approach the NSW government to change the existing
  981. # arrangements. The starting date for summer time on the Island will
  982. # however always coincide with the rest of NSW.
  983. # From James Lonergan, Secretary, Lord Howe Island Board (2000-10-25):
  984. # Lord Howe Island advances clocks by 30 minutes during DST in NSW and retards
  985. # clocks by 30 minutes when DST finishes. Since DST was most recently
  986. # introduced in NSW, the "changeover" time on the Island has been 02:00 as
  987. # shown on clocks on LHI. I guess this means that for 30 minutes at the start
  988. # of DST, LHI is actually 1 hour ahead of the rest of NSW.
  989. # From Paul Eggert (2006-03-22):
  990. # For Lord Howe dates we use Shanks & Pottenger through 1989, and
  991. # Lonergan thereafter. For times we use Lonergan.
  992. # From Paul Eggert (2007-07-23):
  993. # See "southeast Australia" above for 2008 and later.
  994. # From Steffen Thorsen (2009-04-28):
  995. # According to the official press release, South Australia's extended daylight
  996. # saving period will continue with the same rules as used during the 2008-2009
  997. # summer (southern hemisphere).
  998. #
  999. # From
  1000. # <a href="http://www.safework.sa.gov.au/uploaded_files/DaylightDatesSet.pdf">
  1001. # http://www.safework.sa.gov.au/uploaded_files/DaylightDatesSet.pdf
  1002. # </a>
  1003. # The extended daylight saving period that South Australia has been trialling
  1004. # for over the last year is now set to be ongoing.
  1005. # Daylight saving will continue to start on the first Sunday in October each
  1006. # year and finish on the first Sunday in April the following year.
  1007. # Industrial Relations Minister, Paul Caica, says this provides South Australia
  1008. # with a consistent half hour time difference with NSW, Victoria, Tasmania and
  1009. # the ACT for all 52 weeks of the year...
  1010. #
  1011. # We have a wrap-up here:
  1012. # <a href="http://www.timeanddate.com/news/time/south-australia-extends-dst.html">
  1013. # http://www.timeanddate.com/news/time/south-australia-extends-dst.html
  1014. # </a>
  1015. ###############################################################################
  1016. # New Zealand
  1017. # From Mark Davies (1990-10-03):
  1018. # the 1989/90 year was a trial of an extended "daylight saving" period.
  1019. # This trial was deemed successful and the extended period adopted for
  1020. # subsequent years (with the addition of a further week at the start).
  1021. # source -- phone call to Ministry of Internal Affairs Head Office.
  1022. # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06):
  1023. # # The Country of New Zealand (Australia's east island -) Gee they hate that!
  1024. # # or is Australia the west island of N.Z.
  1025. # # [ courtesy of Geoff Tribble.. Auckland N.Z. ]
  1026. # # [ Nov 1990 ]
  1027. # ...
  1028. # Rule NZ 1974 1988 - Oct lastSun 2:00 1:00 D
  1029. # Rule NZ 1989 max - Oct Sun>=1 2:00 1:00 D
  1030. # Rule NZ 1975 1989 - Mar Sun>=1 3:00 0 S
  1031. # Rule NZ 1990 max - Mar lastSun 3:00 0 S
  1032. # ...
  1033. # Zone NZ 12:00 NZ NZ%sT # New Zealand
  1034. # Zone NZ-CHAT 12:45 - NZ-CHAT # Chatham Island
  1035. # From Arthur David Olson (1992-03-08):
  1036. # The chosen rules use the Davies October 8 values for the start of DST in 1989
  1037. # rather than the October 1 value.
  1038. # From Paul Eggert (1995-12-19);
  1039. # Shank & Pottenger report 2:00 for all autumn changes in Australia and NZ.
  1040. # Robert Uzgalis writes that the New Zealand Daylight
  1041. # Savings Time Order in Council dated 1990-06-18 specifies 2:00 standard
  1042. # time on both the first Sunday in October and the third Sunday in March.
  1043. # As with Australia, we'll assume the tradition is 2:00s, not 2:00.
  1044. #
  1045. # From Paul Eggert (2006-03-22):
  1046. # The Department of Internal Affairs (DIA) maintains a brief history,
  1047. # as does Carol Squires; see tz-link.htm for the full references.
  1048. # Use these sources in preference to Shanks & Pottenger.
  1049. #
  1050. # For Chatham, IATA SSIM (1991/1999) gives the NZ rules but with
  1051. # transitions at 2:45 local standard time; this confirms that Chatham
  1052. # is always exactly 45 minutes ahead of Auckland.
  1053. # From Colin Sharples (2007-04-30):
  1054. # DST will now start on the last Sunday in September, and end on the
  1055. # first Sunday in April. The changes take effect this year, meaning
  1056. # that DST will begin on 2007-09-30 2008-04-06.
  1057. # http://www.dia.govt.nz/diawebsite.nsf/wpg_URL/Services-Daylight-Saving-Daylight-saving-to-be-extended
  1058. ###############################################################################
  1059. # Fiji
  1060. # Howse writes (p 153) that in 1879 the British governor of Fiji
  1061. # enacted an ordinance standardizing the islands on Antipodean Time
  1062. # instead of the American system (which was one day behind).
  1063. # From Rives McDow (1998-10-08):
  1064. # Fiji will introduce DST effective 0200 local time, 1998-11-01
  1065. # until 0300 local time 1999-02-28. Each year the DST period will
  1066. # be from the first Sunday in November until the last Sunday in February.
  1067. # From Paul Eggert (2000-01-08):
  1068. # IATA SSIM (1999-09) says DST ends 0100 local time. Go with McDow.
  1069. # From the BBC World Service (1998-10-31 11:32 UTC):
  1070. # The Fijiian government says the main reasons for the time change is to
  1071. # improve productivity and reduce road accidents. But correspondents say it
  1072. # also hopes the move will boost Fiji's ability to compete with other pacific
  1073. # islands in the effort to attract tourists to witness the dawning of the new
  1074. # millenium.
  1075. # http://www.fiji.gov.fj/press/2000_09/2000_09_13-05.shtml (2000-09-13)
  1076. # reports that Fiji has discontinued DST.
  1077. # Johnston
  1078. # Johnston data is from usno1995.
  1079. # Kiribati
  1080. # From Paul Eggert (1996-01-22):
  1081. # Today's _Wall Street Journal_ (page 1) reports that Kiribati
  1082. # ``declared it the same day throught the country as of Jan. 1, 1995''
  1083. # as part of the competition to be first into the 21st century.
  1084. # Kwajalein
  1085. # In comp.risks 14.87 (26 August 1993), Peter Neumann writes:
  1086. # I wonder what happened in Kwajalein, where there was NO Friday,
  1087. # 1993-08-20. Thursday night at midnight Kwajalein switched sides with
  1088. # respect to the International Date Line, to rejoin its fellow islands,
  1089. # going from 11:59 p.m. Thursday to 12:00 m. Saturday in a blink.
  1090. # N Mariana Is, Guam
  1091. # Howse writes (p 153) ``The Spaniards, on the other hand, reached the
  1092. # Philippines and the Ladrones from America,'' and implies that the Ladrones
  1093. # (now called the Marianas) kept American date for quite some time.
  1094. # For now, we assume the Ladrones switched at the same time as the Philippines;
  1095. # see Asia/Manila.
  1096. # US Public Law 106-564 (2000-12-23) made UTC+10 the official standard time,
  1097. # under the name "Chamorro Standard Time". There is no official abbreviation,
  1098. # but Congressman Robert A. Underwood, author of the bill that became law,
  1099. # wrote in a press release (2000-12-27) that he will seek the use of "ChST".
  1100. # Micronesia
  1101. # Alan Eugene Davis writes (1996-03-16),
  1102. # ``I am certain, having lived there for the past decade, that "Truk"
  1103. # (now properly known as Chuuk) ... is in the time zone GMT+10.''
  1104. #
  1105. # Shanks & Pottenger write that Truk switched from UTC+10 to UTC+11
  1106. # on 1978-10-01; ignore this for now.
  1107. # From Paul Eggert (1999-10-29):
  1108. # The Federated States of Micronesia Visitors Board writes in
  1109. # <a href="http://www.fsmgov.org/info/clocks.html">
  1110. # The Federated States of Micronesia - Visitor Information
  1111. # </a> (1999-01-26)
  1112. # that Truk and Yap are UTC+10, and Ponape and Kosrae are UTC+11.
  1113. # We don't know when Kosrae switched from UTC+12; assume January 1 for now.
  1114. # Midway
  1115. # From Charles T O'Connor, KMTH DJ (1956),
  1116. # quoted in the KTMH section of the Radio Heritage Collection
  1117. # <http://radiodx.com/spdxr/KMTH.htm> (2002-12-31):
  1118. # For the past two months we've been on what is known as Daylight
  1119. # Saving Time. This time has put us on air at 5am in the morning,
  1120. # your time down there in New Zealand. Starting September 2, 1956
  1121. # we'll again go back to Standard Time. This'll mean that we'll go to
  1122. # air at 6am your time.
  1123. #
  1124. # From Paul Eggert (2003-03-23):
  1125. # We don't know the date of that quote, but we'll guess they
  1126. # started DST on June 3. Possibly DST was observed other years
  1127. # in Midway, but we have no record of it.
  1128. # Pitcairn
  1129. # From Rives McDow (1999-11-08):
  1130. # A Proclamation was signed by the Governor of Pitcairn on the 27th March 1998
  1131. # with regard to Pitcairn Standard Time. The Proclamation is as follows.
  1132. #
  1133. # The local time for general purposes in the Islands shall be
  1134. # Co-ordinated Universal time minus 8 hours and shall be known
  1135. # as Pitcairn Standard Time.
  1136. #
  1137. # ... I have also seen Pitcairn listed as UTC minus 9 hours in several
  1138. # references, and can only assume that this was an error in interpretation
  1139. # somehow in light of this proclamation.
  1140. # From Rives McDow (1999-11-09):
  1141. # The Proclamation regarding Pitcairn time came into effect on 27 April 1998
  1142. # ... at midnight.
  1143. # From Howie Phelps (1999-11-10), who talked to a Pitcairner via shortwave:
  1144. # Betty Christian told me yesterday that their local time is the same as
  1145. # Pacific Standard Time. They used to be 1/2 hour different from us here in
  1146. # Sacramento but it was changed a couple of years ago.
  1147. # Samoa
  1148. # Howse writes (p 153, citing p 10 of the 1883-11-18 New York Herald)
  1149. # that in 1879 the King of Samoa decided to change
  1150. # ``the date in his kingdom from the Antipodean to the American system,
  1151. # ordaining -- by a masterpiece of diplomatic flattery -- that
  1152. # the Fourth of July should be celebrated twice in that year.''
  1153. # Tonga
  1154. # From Paul Eggert (1996-01-22):
  1155. # Today's _Wall Street Journal_ (p 1) reports that ``Tonga has been plotting
  1156. # to sneak ahead of [New Zealanders] by introducing daylight-saving time.''
  1157. # Since Kiribati has moved the Date Line it's not clear what Tonga will do.
  1158. # Don Mundell writes in the 1997-02-20 Tonga Chronicle
  1159. # <a href="http://www.tongatapu.net.to/tonga/homeland/timebegins.htm">
  1160. # How Tonga became `The Land where Time Begins'
  1161. # </a>:
  1162. # Until 1941 Tonga maintained a standard time 50 minutes ahead of NZST
  1163. # 12 hours and 20 minutes ahead of GMT. When New Zealand adjusted its
  1164. # standard time in 1940s, Tonga had the choice of subtracting from its
  1165. # local time to come on the same standard time as New Zealand or of
  1166. # advancing its time to maintain the differential of 13 degrees
  1167. # (approximately 50 minutes ahead of New Zealand time).
  1168. #
  1169. # Because His Majesty King Taufa'ahau Tupou IV, then Crown Prince
  1170. # Tungi, preferred to ensure Tonga's title as the land where time
  1171. # begins, the Legislative Assembly approved the latter change.
  1172. #
  1173. # But some of the older, more conservative members from the outer
  1174. # islands objected. "If at midnight on Dec. 31, we move ahead 40
  1175. # minutes, as your Royal Highness wishes, what becomes of the 40
  1176. # minutes we have lost?"
  1177. #
  1178. # The Crown Prince, presented an unanswerable argument: "Remember that
  1179. # on the World Day of Prayer, you would be the first people on Earth
  1180. # to say your prayers in the morning."
  1181. # From Paul Eggert (2006-03-22):
  1182. # Shanks & Pottenger say the transition was on 1968-10-01; go with Mundell.
  1183. # From Eric Ulevik (1999-05-03):
  1184. # Tonga's director of tourism, who is also secretary of the National Millenium
  1185. # Committee, has a plan to get Tonga back in front.
  1186. # He has proposed a one-off move to tropical daylight saving for Tonga from
  1187. # October to March, which has won approval in principle from the Tongan
  1188. # Government.
  1189. # From Steffen Thorsen (1999-09-09):
  1190. # * Tonga will introduce DST in November
  1191. #
  1192. # I was given this link by John Letts:
  1193. # <a href="http://news.bbc.co.uk/hi/english/world/asia-pacific/newsid_424000/424764.stm">
  1194. # http://news.bbc.co.uk/hi/english/world/asia-pacific/newsid_424000/424764.stm
  1195. # </a>
  1196. #
  1197. # I have not been able to find exact dates for the transition in November
  1198. # yet. By reading this article it seems like Fiji will be 14 hours ahead
  1199. # of UTC as well, but as far as I know Fiji will only be 13 hours ahead
  1200. # (12 + 1 hour DST).
  1201. # From Arthur David Olson (1999-09-20):
  1202. # According to <a href="http://www.tongaonline.com/news/sept1799.html">
  1203. # http://www.tongaonline.com/news/sept1799.html
  1204. # </a>:
  1205. # "Daylight Savings Time will take effect on Oct. 2 through April 15, 2000
  1206. # and annually thereafter from the first Saturday in October through the
  1207. # third Saturday of April. Under the system approved by Privy Council on
  1208. # Sept. 10, clocks must be turned ahead one hour on the opening day and
  1209. # set back an hour on the closing date."
  1210. # Alas, no indication of the time of day.
  1211. # From Rives McDow (1999-10-06):
  1212. # Tonga started its Daylight Saving on Saturday morning October 2nd at 0200am.
  1213. # Daylight Saving ends on April 16 at 0300am which is Sunday morning.
  1214. # From Steffen Thorsen (2000-10-31):
  1215. # Back in March I found a notice on the website http://www.tongaonline.com
  1216. # that Tonga changed back to standard time one month early, on March 19
  1217. # instead of the original reported date April 16. Unfortunately, the article
  1218. # is no longer available on the site, and I did not make a copy of the
  1219. # text, and I have forgotten to report it here.
  1220. # (Original URL was: http://www.tongaonline.com/news/march162000.htm )
  1221. # From Rives McDow (2000-12-01):
  1222. # Tonga is observing DST as of 2000-11-04 and will stop on 2001-01-27.
  1223. # From Sione Moala-Mafi (2001-09-20) via Rives McDow:
  1224. # At 2:00am on the first Sunday of November, the standard time in the Kingdom
  1225. # shall be moved forward by one hour to 3:00am. At 2:00am on the last Sunday
  1226. # of January the standard time in the Kingdom shall be moved backward by one
  1227. # hour to 1:00am.
  1228. # From Pulu 'Anau (2002-11-05):
  1229. # The law was for 3 years, supposedly to get renewed. It wasn't.
  1230. # Wake
  1231. # From Vernice Anderson, Personal Secretary to Philip Jessup,
  1232. # US Ambassador At Large (oral history interview, 1971-02-02):
  1233. #
  1234. # Saturday, the 14th [of October, 1950] -- ... The time was all the
  1235. # more confusing at that point, because we had crossed the
  1236. # International Date Line, thus getting two Sundays. Furthermore, we
  1237. # discovered that Wake Island had two hours of daylight saving time
  1238. # making calculation of time in Washington difficult if not almost
  1239. # impossible.
  1240. #
  1241. # http://www.trumanlibrary.org/wake/meeting.htm
  1242. # From Paul Eggert (2003-03-23):
  1243. # We have no other report of DST in Wake Island, so omit this info for now.
  1244. ###############################################################################
  1245. # The International Date Line
  1246. # From Gwillim Law (2000-01-03):
  1247. #
  1248. # The International Date Line is not defined by any international standard,
  1249. # convention, or treaty. Mapmakers are free to draw it as they please.
  1250. # Reputable mapmakers will simply ensure that every point of land appears on
  1251. # the correct side of the IDL, according to the date legally observed there.
  1252. #
  1253. # When Kiribati adopted a uniform date in 1995, thereby moving the Phoenix and
  1254. # Line Islands to the west side of the IDL (or, if you prefer, moving the IDL
  1255. # to the east side of the Phoenix and Line Islands), I suppose that most
  1256. # mapmakers redrew the IDL following the boundary of Kiribati. Even that line
  1257. # has a rather arbitrary nature. The straight-line boundaries between Pacific
  1258. # island nations that are shown on many maps are based on an international
  1259. # convention, but are not legally binding national borders.... The date is
  1260. # governed by the IDL; therefore, even on the high seas, there may be some
  1261. # places as late as fourteen hours later than UTC. And, since the IDL is not
  1262. # an international standard, there are some places on the high seas where the
  1263. # correct date is ambiguous.
  1264. # From Wikipedia <http://en.wikipedia.org/wiki/Time_zone> (2005-08-31):
  1265. # Before 1920, all ships kept local apparent time on the high seas by setting
  1266. # their clocks at night or at the morning sight so that, given the ship's
  1267. # speed and direction, it would be 12 o'clock when the Sun crossed the ship's
  1268. # meridian (12 o'clock = local apparent noon). During 1917, at the
  1269. # Anglo-French Conference on Time-keeping at Sea, it was recommended that all
  1270. # ships, both military and civilian, should adopt hourly standard time zones
  1271. # on the high seas. Whenever a ship was within the territorial waters of any
  1272. # nation it would use that nation's standard time. The captain was permitted
  1273. # to change his ship's clocks at a time of his choice following his ship's
  1274. # entry into another zone time--he often chose midnight. These zones were
  1275. # adopted by all major fleets between 1920 and 1925 but not by many
  1276. # independent merchant ships until World War II.
  1277. # From Paul Eggert, using references suggested by Oscar van Vlijmen
  1278. # (2005-03-20):
  1279. #
  1280. # The American Practical Navigator (2002)
  1281. # <http://pollux.nss.nima.mil/pubs/pubs_j_apn_sections.html?rid=187>
  1282. # talks only about the 180-degree meridian with respect to ships in
  1283. # international waters; it ignores the international date line.