proposed tz changes for Bahamas, Eucla, Eritrea, Faroe

Paul Eggert eggert at CS.UCLA.EDU
Tue Jan 2 17:45:36 UTC 2007 

"Dave O'Callaghan" <daveoc at uk.ibm.com> writes:

> Have you got an date in mind for the next update (assume tzdata2007a) 
> which will include the Bahamas?

No, but if there's a need let's put out a new version now.
Here is a proposed set of changes that includes the Bahamas
change, along with the other changes I've saved up.

* Changes affecting future time stamps.

  - The Bahamas also observe the new US DST rules this year.
    (Thanks to Sue Williams for this.)

* Changes affecting TZ names, to reflect typical English practice better.
  The old names are still supported, in the 'backward' file.

  - Rename Africa/Asmera to Africa/Asmara.

  - Rename Atlantic/Faeroe to Atlantic/Faroe.

* A new zone Australia/Eucla, covering the Eucla area.  (Thanks to
  Alex Livingston for this.)

* Changes affecting old time stamps.

  - The 1982 transition for Pacific/Easter occurred Mar 13, not Jan 18.
    Also, the pre-1932 time stamps are now labeled EMT, not MMT, since
    they are not Mataveri Mean Time.  (Thanks to Jesper Norgaard Welen
    for this.)

* The web page is updated to point to a new research on daylight
  saving time in Australia commissioned by the Parliamentary Library.

===================================================================
RCS file: RCS/africa,v
retrieving revision 2006.13
retrieving revision 2006.13.0.1
diff -pu -r2006.13 -r2006.13.0.1
--- africa	2006/10/02 19:31:06	2006.13
+++ africa	2007/01/02 17:34:54	2006.13.0.1
@@ -232,7 +232,7 @@ Zone	Africa/Malabo	0:35:08 -	LMT	1912
 
 # Eritrea
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-Zone	Africa/Asmera	2:35:32 -	LMT	1870
+Zone	Africa/Asmara	2:35:32 -	LMT	1870
 			2:35:32	-	AMT	1890	      # Asmera Mean Time
 			2:35:20	-	ADMT	1936 May 5    # Adis Dera MT
 			3:00	-	EAT
===================================================================
RCS file: RCS/australasia,v
retrieving revision 2006.16
retrieving revision 2006.16.0.1
diff -pu -r2006.16 -r2006.16.0.1
--- australasia	2006/11/27 13:53:52	2006.16
+++ australasia	2007/01/02 17:34:54	2006.16.0.1
@@ -30,11 +30,6 @@ Zone Australia/Darwin	 8:43:20 -	LMT	189
 			 9:30	Aus	CST
 # Western Australia
 #
-# From Christopher Hunt (2006-11-21), after an advance warning
-# from Jesper Norgaard Welen (2006-11-01):
-# WA are trialing DST for three years. 
-# <http://www.parliament.wa.gov.au/parliament/bills.nsf/62D4F7C55EA88993482572110007316A/$File/Bill174-1.pdf>
-#
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	AW	1974	only	-	Oct	lastSun	2:00s	1:00	-
 Rule	AW	1975	only	-	Mar	Sun>=1	2:00s	0	-
@@ -48,6 +43,10 @@ Rule	AW	2007	2008	-	Oct	lastSun	2:00s	1:
 Zone Australia/Perth	 7:43:24 -	LMT	1895 Dec
 			 8:00	Aus	WST	1943 Jul
 			 8:00	AW	WST
+Zone Australia/Eucla	 8:35:28 -	LMT	1895 Dec
+			 8:45	Aus	CWST	1943 Jul
+			 8:45	AW	CWST
+
 # Queensland
 #
 # From Alex Livingston (1996-11-01):
@@ -203,16 +202,16 @@ Zone Australia/Lord_Howe 10:36:20 -	LMT	
 #
 # Ashmore Is, Cartier
 # no indigenous inhabitants; only seasonal caretakers
-# like Australia/Perth, says Turner
+# no times are set
 #
 # Coral Sea Is
 # no indigenous inhabitants; only meteorologists
-# no information
+# no times are set
 #
 # Macquarie
 # permanent occupation (scientific station) since 1948;
 # sealing and penguin oil station operated 1888/1917
-# like Australia/Hobart, says Turner
+# like Australia/Hobart
 
 # Christmas
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
@@ -544,6 +543,7 @@ Zone	Pacific/Wallis	12:15:20 -	LMT	1901
 #		std dst
 #		LMT	Local Mean Time
 #	  8:00	WST WST	Western Australia
+#	  8:45	CWST CWST Central Western Australia*
 #	  9:00	JST	Japan
 #	  9:30	CST CST	Central Australia
 #	 10:00	EST EST	Eastern Australia
@@ -816,37 +816,51 @@ Zone	Pacific/Wallis	12:15:20 -	LMT	1901
 # From Arthur David Olson (1992-03-08):
 # The chosen rules the union of the 1971/1972 change and the 1989-1992 changes.
 
+# From Christopher Hunt (2006-11-21), after an advance warning
+# from Jesper Norgaard Welen (2006-11-01):
+# WA are trialing DST for three years. 
+# <http://www.parliament.wa.gov.au/parliament/bills.nsf/9A1B183144403DA54825721200088DF1/$File/Bill175-1B.pdf>
+
 # From Rives McDow (2002-04-09):
 # The most interesting region I have found consists of three towns on the
-# southern coast of Australia, population 10 at last report, along with
-# 50,000 sheep, about 100 kilometers long and 40 kilometers into the
-# continent.  The primary town is Madura, with the other towns being
-# Mundrabilla and Eucla.  According to the sheriff of Madura, the
-# residents got tired of having to change the time so often, as they are
-# located in a strip overlapping the border of South Australia and Western
-# Australia.  South Australia observes daylight saving time; Western
+# southern coast....  South Australia observes daylight saving time; Western
 # Australia does not.  The two states are one and a half hours apart.  The
 # residents decided to forget about this nonsense of changing the clock so
 # much and set the local time 20 hours and 45 minutes from the
 # international date line, or right in the middle of the time of South
-# Australia and Western Australia.  As it only affects about 10 people and
-# tourists staying at the Madura Motel, it has never really made as big an
-# impact as Broken Hill.  However, as tourist visiting there or anyone
-# calling the local sheriff will attest, they do keep time in this way.
+# Australia and Western Australia....
 #
 # From Paul Eggert (2002-04-09):
 # This is confirmed by the section entitled
 # "What's the deal with time zones???" in
-# <http://www.earthsci.unimelb.edu.au/~awatkins/null.html>,
-# which says a few other things:
+# <http://www.earthsci.unimelb.edu.au/~awatkins/null.html>.
 #
-# * Border Village, SA also is 45 minutes ahead of Perth.
-# * The locals call this time zone "central W.A. Time" (presumably "CWAT").
-# * The locals also call Western Australia time "Perth time".
-#
-# It's not clear from context whether everyone in Western Australia
-# knows of this naming convention, or whether it's just the people in
-# this subregion.
+# From Alex Livingston (2006-12-07):
+# ... it was just on four years ago that I drove along the Eyre Highway,
+# which passes through eastern Western Australia close to the southern
+# coast of the continent.
+#
+# I paid particular attention to the time kept there. There can be no
+# dispute that UTC+08:45 was considered "the time" from the border
+# village just inside the border with South Australia to as far west
+# as just east of Caiguna. There can also be no dispute that Eucla is
+# the largest population centre in this zone....
+#
+# Now that Western Australia is observing daylight saving, the
+# question arose whether this part of the state would follow suit. I
+# just called the border village and confirmed that indeed they have,
+# meaning that they are now observing UTC+09:45.
+# 
+# (2006-12-09):
+# I personally doubt that either experimentation with daylight saving
+# in WA or its introduction in SA had anything to do with the genesis
+# of this time zone.  My hunch is that it's been around since well
+# before 1975.  I remember seeing it noted on road maps decades ago.
+
+# From Paul Eggert (2006-12-15):
+# For lack of better info, assume the tradition dates back to the
+# introduction of standard time in 1895.
+
 
 # South Australia, Tasmania, Victoria
 
===================================================================
RCS file: RCS/backward,v
retrieving revision 2006.11
retrieving revision 2006.11.0.1
diff -pu -r2006.11 -r2006.11.0.1
--- backward	2006/08/21 13:56:08	2006.11
+++ backward	2007/01/02 17:34:54	2006.11.0.1
@@ -3,6 +3,7 @@
 # This file provides links between current names for time zones
 # and their old names.  Many names changed in late 1993.
 
+Link	Africa/Asmara		Africa/Asmera
 Link	Africa/Bamako		Africa/Timbuktu
 Link	America/Argentina/Catamarca	America/Argentina/ComodRivadavia
 Link	America/Adak		America/Atka
@@ -28,6 +29,7 @@ Link	Asia/Jerusalem		Asia/Tel_Aviv
 Link	Asia/Thimphu		Asia/Thimbu
 Link	Asia/Makassar		Asia/Ujung_Pandang
 Link	Asia/Ulaanbaatar	Asia/Ulan_Bator
+Link	Atlantic/Faroe		Atlantic/Faeroe
 Link	Australia/Sydney	Australia/ACT
 Link	Australia/Sydney	Australia/Canberra
 Link	Australia/Lord_Howe	Australia/LHI
===================================================================
RCS file: RCS/europe,v
retrieving revision 2006.14
retrieving revision 2006.14.0.1
diff -pu -r2006.14 -r2006.14.0.1
--- europe	2006/10/10 15:31:46	2006.14
+++ europe	2007/01/02 17:34:54	2006.14.0.1
@@ -754,7 +754,7 @@ Zone	Europe/Prague	0:57:44 -	LMT	1850
 			1:00	Czech	CE%sT	1979
 			1:00	EU	CE%sT
 
-# Denmark, Faeroe Islands, and Greenland
+# Denmark, Faroe Islands, and Greenland
 
 # From Jesper Norgaard Welen (2005-04-26):
 # http://www.hum.aau.dk/~poe/tid/tine/DanskTid.htm says that the law
@@ -809,7 +809,7 @@ Zone Europe/Copenhagen	 0:50:20 -	LMT	18
 			 1:00	C-Eur	CE%sT	1945 Apr  2 2:00
 			 1:00	Denmark	CE%sT	1980
 			 1:00	EU	CE%sT
-Zone Atlantic/Faeroe	-0:27:04 -	LMT	1908 Jan 11	# Torshavn
+Zone Atlantic/Faroe	-0:27:04 -	LMT	1908 Jan 11	# Torshavn
 			 0:00	-	WET	1981
 			 0:00	EU	WE%sT
 #
===================================================================
RCS file: RCS/iso3166.tab,v
retrieving revision 2006.14
retrieving revision 2006.14.0.1
diff -pu -r2006.14 -r2006.14.0.1
--- iso3166.tab	2006/10/10 15:31:46	2006.14
+++ iso3166.tab	2007/01/02 17:34:54	2006.14.0.1
@@ -92,7 +92,7 @@ FI	Finland
 FJ	Fiji
 FK	Falkland Islands
 FM	Micronesia
-FO	Faeroe Islands
+FO	Faroe Islands
 FR	France
 GA	Gabon
 GB	Britain (UK)
===================================================================
RCS file: RCS/northamerica,v
retrieving revision 2006.15
retrieving revision 2006.15.0.1
diff -pu -r2006.15 -r2006.15.0.1
--- northamerica	2006/11/06 14:17:39	2006.15
+++ northamerica	2007/01/02 17:34:54	2006.15.0.1
@@ -1997,13 +1997,19 @@ Zone	America/Antigua	-4:07:12 -	LMT	1912
 			-4:00	-	AST
 
 # Bahamas
+#
+# From Sue Williams (2006-12-07):
+# The Bahamas announced about a month ago that they plan to change their DST 
+# rules to sync with the U.S. starting in 2007....
+# http://www.jonesbahamas.com/?c=45&a=10412
+
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Bahamas	1964	max	-	Oct	lastSun	2:00	0	S
+Rule	Bahamas	1964	2006	-	Oct	lastSun	2:00	0	S
 Rule	Bahamas	1964	1986	-	Apr	lastSun	2:00	1:00	D
-Rule	Bahamas	1987	max	-	Apr	Sun>=1	2:00	1:00	D
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	America/Nassau	-5:09:24 -	LMT	1912 Mar 2
-			-5:00	Bahamas	E%sT
+			-5:00	Bahamas	E%sT	1976
+			-5:00	US	E%sT
 
 # Barbados
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
===================================================================
RCS file: RCS/southamerica,v
retrieving revision 2006.15
retrieving revision 2006.15.0.1
diff -pu -r2006.15 -r2006.15.0.1
--- southamerica	2006/11/06 14:17:39	2006.15
+++ southamerica	2007/01/02 17:34:54	2006.15.0.1
@@ -714,8 +714,13 @@ Zone America/Rio_Branco	-4:31:12 -	LMT	1
 # (they should have been 1990-09-15 and 1990-09-16 respectively), but
 # anyhow it clears up some doubts too.
 
-# The following data are from <http://www.horaoficial.cl/horaof.htm>
-# (2006-09-20), transcribed by Jesper Norgaard Welen.
+# From Paul Eggert (2006-12-27):
+# The following data for Chile and America/Santiago are from
+# <http://www.horaoficial.cl/horaof.htm> (2006-09-20), transcribed by
+# Jesper Norgaard Welen.  The data for Pacific/Easter are from Shanks
+# & Pottenger, except with DST transitions after 1932 cloned from
+# America/Santiago.  The pre-1980 Pacific/Easter data are dubious,
+# but we have no other source.
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	Chile	1927	1932	-	Sep	 1	0:00	1:00	S
@@ -759,9 +764,9 @@ Zone America/Santiago	-4:42:46 -	LMT	189
 			-4:42:46 -	SMT	1927 Sep  1 # Santiago Mean Time
 			-5:00	Chile	CL%sT	1947 May 22 # Chile Time
 			-4:00	Chile	CL%sT
-Zone Pacific/Easter	-7:17:28 -	LMT	1890	    # Mataveri
-			-7:17:28 -	MMT	1932 Sep    # Mataveri Mean Time
-			-7:00	Chile	EAS%sT	1982 Jan 18 21:00 # Easter I Time
+Zone Pacific/Easter	-7:17:28 -	LMT	1890
+			-7:17:28 -	EMT	1932 Sep    # Easter Mean Time
+			-7:00	Chile	EAS%sT	1982 Mar 13 21:00 # Easter I Time
 			-6:00	Chile	EAS%sT
 #
 # Sala y Gomez Island is like Pacific/Easter.
===================================================================
RCS file: RCS/tz-link.htm,v
retrieving revision 2006.16
retrieving revision 2006.16.0.1
diff -pu -r2006.16 -r2006.16.0.1
--- tz-link.htm	2006/11/27 13:53:52	2006.16
+++ tz-link.htm	2007/01/02 17:34:54	2006.16.0.1
@@ -8,7 +8,7 @@
 <meta http-equiv="Content-type" content='text/html; charset="US-ASCII"'>
 <meta name="DC.Creator" content="Eggert, Paul">
 <meta name="DC.Contributor" content="Olson, Arthur David">
-<meta name="DC.Date" content="2006-11-22">
+<meta name="DC.Date" content="2007-01-02">
 <meta name="DC.Description"
  content="Sources of information about time zones and daylight saving time">
 <meta name="DC.Identifier" content="http://www.twinsun.com/tz/tz-link.htm">
@@ -379,7 +379,10 @@ Zone Concepts</a> discusses terminologic
 <h2>National histories of legal time</h2>
 <dl>
 <dt>Australia</dt>
-<dd>The Bureau of Metrology publishes a list of
+<dd>The Parliamentary Library has commissioned <a
+href="http://www.aph.gov.au/LIBRARY/Pubs/rn/2006-07/07rn13.pdf">research
+note on daylight saving time in Australia</a>.
+The Bureau of Metrology publishes a list of
 <a href="http://www.bom.gov.au/climate/averages/tables/dst_times.shtml">Implementation Dates of Daylight Savings Time within Australia</a>.</dd>
 <dt>Austria</dt>
 <dd>The Federal Office of Metrology and Surveying publishes a
===================================================================
RCS file: RCS/zone.tab,v
retrieving revision 2006.16
retrieving revision 2006.16.0.1
diff -pu -r2006.16 -r2006.16.0.1
--- zone.tab	2006/11/27 13:53:52	2006.16
+++ zone.tab	2007/01/02 17:34:54	2006.16.0.1
@@ -63,7 +63,8 @@ AU	-2728+15302	Australia/Brisbane	Queens
 AU	-2016+14900	Australia/Lindeman	Queensland - Holiday Islands
 AU	-3455+13835	Australia/Adelaide	South Australia
 AU	-1228+13050	Australia/Darwin	Northern Territory
-AU	-3157+11551	Australia/Perth	Western Australia
+AU	-3157+11551	Australia/Perth	Western Australia - most locations
+AU	-3143+12852	Australia/Eucla	Western Australia - Eucla area
 AW	+1230-06858	America/Aruba
 AX	+6006+01957	Europe/Mariehamn
 AZ	+4023+04951	Asia/Baku
@@ -134,7 +135,7 @@ CH	+4723+00832	Europe/Zurich
 CI	+0519-00402	Africa/Abidjan
 CK	-2114-15946	Pacific/Rarotonga
 CL	-3327-07040	America/Santiago	most locations
-CL	-2710-10927	Pacific/Easter	Easter Island & Sala y Gomez
+CL	-2709-10926	Pacific/Easter	Easter Island & Sala y Gomez
 CM	+0403+00942	Africa/Douala
 CN	+3114+12128	Asia/Shanghai	east China - Beijing, Guangdong, Shanghai, etc.
 CN	+4545+12641	Asia/Harbin	Heilongjiang (except Mohe), Jilin
@@ -159,7 +160,7 @@ EC	-0054-08936	Pacific/Galapagos	Galapag
 EE	+5925+02445	Europe/Tallinn
 EG	+3003+03115	Africa/Cairo
 EH	+2709-01312	Africa/El_Aaiun
-ER	+1520+03853	Africa/Asmera
+ER	+1520+03853	Africa/Asmara
 ES	+4024-00341	Europe/Madrid	mainland
 ES	+3553-00519	Africa/Ceuta	Ceuta & Melilla
 ES	+2806-01524	Atlantic/Canary	Canary Islands

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