# Timezone history of Germany
# compiled by Alois Treindl, August 2011
# assigned to the public domain

# processing this file with the zone info compiler zic requires that zic.c
# is patched with the 'follow rule' patch submitted on 2011 Aug 25.

# Sources: 
# Gabriel, Traite de l'heure dans le Monde, edition 1991
# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
# San Diego: ACS Publications, Inc. (2003).
# Henri Le Corre, Regimes Horaires pour l'Eruope et l'Afrique, 1982
# various German astrological and astronomical publications.

# The tzdata file europe contains only one zone Europe/Berlin for all of Germany.
# It is not the best possible choice for several reasons:
# - Berlin started CET only in 1893, later than several southern states.
# - In 1947, Berlin followed double summertime, together with the Soviet zone
# of occupied Germany. The major part of Germany however, occupied by the
# western allies, did not follow double summer time in 1945.
# Below we use Europe/Munich as a reference zone, and follow rules which point
# to it in other zones. If DST rules for Germany should change after 2011, both
# Europe/Berlin and Europe/Munich need to be updated. The rest will follow
# automatically.

# Zone Europe/Berlin is good for the following German provinces:
# Brandenburg, Mecklenburg-Vorpommern, Sachsen, Sachsen-Anhalt, Thüringen, Berlin.
# This corresponds to the former German Democratic Republic (DDR) plus all of
# Berlin, i.e. East and West Berlin.

# German province Bavaria
# Munich meridian 11e33 from 1891 Mar 15 until 1892 Apr 1
# started CET on 1892 Apr 1, earlier than norther parts of Germany.
# This zone is used as master for other German history zones to follow.
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/Munich	0:46:12 -	LMT	1891 Mar 15 0:00
			0:46:12 -	MMT	1892 Apr 1  0:00
			1:00	C-Eur	CE%sT	1945 Sep 16 2:00
			1:00	Germany	CE%sT	1980
			1:00	EU	CE%sT

# The old province of Baden, which was combined to Baden-Wurttemberg in 1952
# Karlsruhe meridian 8e24 from 1891 Mar 15 until 1892 Apr 1
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/Mannheim 0:33:56 -	LMT	1891 Mar 15 0:00
			0:33:36 -	KMT	1892 Apr 1  0:00
			0	follow	Europe/Munich

# The old province of Wurttemberg, which was combined to Baden-Wurttemberg in 1952
# Stuttgart meridian 9e10 from 1891 Mar 15 until 1892 Apr 1
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/Stuttgart 0:36:40 -	LMT	1891 Mar 15 0:00
			0:36:40 -	SMT	1892 Apr 1  0:00
			0	follow	Europe/Munich

# The German provinces Bremen, Hamburg, Hessen, Niedersachsen,
# Schleswig-Holtsein and that part of Nordrhein-Westfalen which is east of the
# Rhine.
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/Frankfurt 0:34:40 -	LMT	1893 Apr
			0	follow	Europe/Munich

# The province of Rheinland-Pfalz, part which is west of the Rhine
# Ludwigshafen meridian 8e26 from 1891 Mar 15 until 1892 Apr 1
# Follows Paris time during French occupation Dec 1918 - Apr 1927
# Gabriel gives 1918 Dec 8 as start of French time, Shanks has 1919 Jan 1,
# follow Gabriel.
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/Ludwigshafen 0:33:44 -	LMT	1891 Mar 15 0:00
			0:33:44 -	LUT	1892 Apr 1  0:00
			1:00	-	CET	1893 Apr 1  0:00
			1:00    C-Eur	CE%sT	1918 Dec 12  23:00
			0:00	France	WE%sT	1927 Apr 9  23:00
			0	follow	Europe/Munich

# The province of Rheinland-Pfalz, part which is east of the Rhine
# Ludwigshafen meridian 8e26 from 1891 Mar 15 until 1892 Apr 1
# Gabriel writes it follows German time even during French occupation 1919 - 1927
Zone	Europe/Mainz	0:33:04 -	LMT	1891 Mar 15 0:00
			0:33:44 -	LUT	1892 Apr 1  0:00
			0	follow	Europe/Munich

# The province Nordrhein-Westfalen, part which is west of the Rhine.
# It followed Paris time during French occupation 1918 Dec 6 - 1927
Zone	Europe/Cologne 0:27:56 -	LMT	1893 Apr
			1:00    C-Eur	CE%sT	1918 Dec 6  23:00
			0:00	France	WE%sT	1927 Apr 9  23:00
			0	follow	Europe/Munich

# The province Saarland
# It had Paris time during French occupation 1918 - 1925,
# (sources: magazine Merdian 5/1987, p36 ff, Gabriel).
# During the French occupation, many birth registry office are said to have
# ignored the French time, so that an uncertainty remains.
# It followed French time also from Oct 1947, which by then was CET, so that
# it did not observe German DST in 1948 and 1949 (sources: book Lebendige Astrologie,
# Ulrike Voltmer, a local astrologer from Saarland, and Gabriel).
Zone	Europe/Saarbrucken 0:27:56 -	LMT	1893 Apr
			1:00    C-Eur	CE%sT	1918 Nov 11 23:00
			0:00	France	WE%sT	1925 Jan 31 23:00
			0	follow	Europe/Munich

# Part of Germany to the east of the Oder-Neisse line which became part of
# Poland in 1945. Once Poland history is completed, this zone will be replaced
# by a link to the corresponding Poland zone.
# The zone includes also the southern part of Ostpreussen (East Prussia).
# We let if follow Warsaw from 1945 Apr, so that DST begin in 1945 follows Poland.
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/Breslau	1:08:00 -	LMT	1893 Apr 1 0:00
			1:00	C-Eur	CE%sT	1945 Apr 
			0	follow	Europe/Warsaw

# The area of Danzig received a special status in 1918, was reintegrated
# into Germany during the German occupation of Poland in 1939, and went to Poland
# in 1945. Once Poland history is updated, will be place with Poland.
# It includes the towns	Danzig, Zoppot, Tiegenhof, Praust, Neuteich
# We use Danzig and not Polish Gdansk, because tzdata prescribe city names as
# commonly used in English language. 
# We let if follow Warsaw from 1945 Apr, so that DST begin in 1945 follows Poland.
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone	Europe/Danzig	1:14:40 -	LMT	1893 Apr 1 0:00
			1:00	C-Eur	CE%sT	1918 Sep 16 3:00
			2:00	Poland	EE%sT	1922 Jun
			1:00	Poland	CE%sT	1940 Jun 23 2:00
			1:00	C-Eur	CE%sT	1945 Apr 
			0	follow	Europe/Warsaw

# The northern part of German province Ostpreussen (East Prussia) which
# became part of Russia in 1945.
Link Europe/Kaliningrad Europe/Konigsberg