path: root/timezone/africa

# <pre>
# @(#)africa	8.21
# This file is in the public domain, so clarified as of
# 2009-05-17 by Arthur David Olson.

# This data is by no means authoritative; if you think you know better,
# go ahead and edit the file (and please send any changes to
# tz@elsie.nci.nih.gov for general use in the future).

# From Paul Eggert (2006-03-22):
#
# A good source for time zone historical data outside the U.S. is
# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
# San Diego: ACS Publications, Inc. (2003).
#
# Gwillim Law writes that a good source
# for recent time zone data is the International Air Transport
# Association's Standard Schedules Information Manual (IATA SSIM),
# published semiannually.  Law sent in several helpful summaries
# of the IATA's data after 1990.
#
# Except where otherwise noted, Shanks & Pottenger is the source for
# entries through 1990, and IATA SSIM is the source for entries afterwards.
#
# Another source occasionally used is Edward W. Whitman, World Time Differences,
# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), which
# I found in the UCLA library.
#
# A reliable and entertaining source about time zones is
# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
#
# Previous editions of this database used WAT, CAT, SAT, and EAT
# for +0:00 through +3:00, respectively,
# but Mark R V Murray reports that
# `SAST' is the official abbreviation for +2:00 in the country of South Africa,
# `CAT' is commonly used for +2:00 in countries north of South Africa, and
# `WAT' is probably the best name for +1:00, as the common phrase for
# the area that includes Nigeria is ``West Africa''.
# He has heard of ``Western Sahara Time'' for +0:00 but can find no reference.
#
# To make things confusing, `WAT' seems to have been used for -1:00 long ago;
# I'd guess that this was because people needed _some_ name for -1:00,
# and at the time, far west Africa was the only major land area in -1:00.
# This usage is now obsolete, as the last use of -1:00 on the African
# mainland seems to have been 1976 in Western Sahara.
#
# To summarize, the following abbreviations seem to have some currency:
#	-1:00	WAT	West Africa Time (no longer used)
#	 0:00	GMT	Greenwich Mean Time
#	 2:00	CAT	Central Africa Time
#	 2:00	SAST	South Africa Standard Time
# and Murray suggests the following abbreviation:
#	 1:00	WAT	West Africa Time
# I realize that this leads to `WAT' being used for both -1:00 and 1:00
# for times before 1976, but this is the best I can think of
# until we get more information.
#
# I invented the following abbreviations; corrections are welcome!
#	 2:00	WAST	West Africa Summer Time
#	 2:30	BEAT	British East Africa Time (no longer used)
#	 2:44:45 BEAUT	British East Africa Unified Time (no longer used)
#	 3:00	CAST	Central Africa Summer Time (no longer used)
#	 3:00	SAST	South Africa Summer Time (no longer used)
#	 3:00	EAT	East Africa Time
#	 4:00	EAST	East Africa Summer Time (no longer used)

# Algeria
# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	Algeria	1916	only	-	Jun	14	23:00s	1:00	S
Rule	Algeria	1916	1919	-	Oct	Sun>=1	23:00s	0	-
Rule	Algeria	1917	only	-	Mar	24	23:00s	1:00	S
Rule	Algeria	1918	only	-	Mar	 9	23:00s	1:00	S
Rule	Algeria	1919	only	-	Mar	 1	23:00s	1:00	S
Rule	Algeria	1920	only	-	Feb	14	23:00s	1:00	S
Rule	Algeria	1920	only	-	Oct	23	23:00s	0	-
Rule	Algeria	1921	only	-	Mar	14	23:00s	1:00	S
Rule	Algeria	1921	only	-	Jun	21	23:00s	0	-
Rule	Algeria	1939	only	-	Sep	11	23:00s	1:00	S
Rule	Algeria	1939	only	-	Nov	19	 1:00	0	-
Rule	Algeria	1944	1945	-	Apr	Mon>=1	 2:00	1:00	S
Rule	Algeria	1944	only	-	Oct	 8	 2:00	0	-
Rule	Algeria	1945	only	-	Sep	16	 1:00	0	-
Rule	Algeria	1971	only	-	Apr	25	23:00s	1:00	S
Rule	Algeria	1971	only	-	Sep	26	23:00s	0	-
Rule	Algeria	1977	only	-	May	 6	 0:00	1:00	S
Rule	Algeria	1977	only	-	Oct	21	 0:00	0	-
Rule	Algeria	1978	only	-	Mar	24	 1:00	1:00	S
Rule	Algeria	1978	only	-	Sep	22	 3:00	0	-
Rule	Algeria	1980	only	-	Apr	25	 0:00	1:00	S
Rule	Algeria	1980	only	-	Oct	31	 2:00	0	-
# Shanks & Pottenger give 0:09:20 for Paris Mean Time; go with Howse's
# more precise 0:09:21.
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone	Africa/Algiers	0:12:12 -	LMT	1891 Mar 15 0:01
			0:09:21	-	PMT	1911 Mar 11    # Paris Mean Time
			0:00	Algeria	WE%sT	1940 Feb 25 2:00
			1:00	Algeria	CE%sT	1946 Oct  7
			0:00	-	WET	1956 Jan 29
			1:00	-	CET	1963 Apr 14
			0:00	Algeria	WE%sT	1977 Oct 21
			1:00	Algeria	CE%sT	1979 Oct 26
			0:00	Algeria	WE%sT	1981 May
			1:00	-	CET

# Angola
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone	Africa/Luanda	0:52:56	-	LMT	1892
			0:52:04	-	AOT	1911 May 26 # Angola Time
			1:00	-	WAT

# Benin
# Whitman says they switched to 1:00 in 1946, not 1934;
# go with Shanks & Pottenger.
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone Africa/Porto-Novo	0:10:28	-	LMT	1912
			0:00	-	GMT	1934 Feb 26
			1:00	-	WAT

# Botswana
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone	Africa/Gaborone	1:43:40 -	LMT	1885
			2:00	-	CAT	1943 Sep 19 2:00
			2:00	1:00	CAST	1944 Mar 19 2:00
			2:00	-	CAT

# Burkina Faso
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone Africa/Ouagadougou	-0:06:04 -	LMT	1912
			 0:00	-	GMT

# Burundi
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone Africa/Bujumbura	1:57:28	-	LMT	1890
			2:00	-	CAT

# Cameroon
# Whitman says they switched to 1:00 in 1920; go with Shanks & Pottenger.
# Zone	NAME		GMTOFF