#ident	"@(#)zic:europe	1.1.2.3"
#ident	"$Header: europe 1.1 91/02/28 $"


#		PROPRIETARY NOTICE (Combined)
#
#This source code is unpublished proprietary information
#constituting, or derived under license from AT&T's UNIX(r) System V.
#In addition, portions of such source code were derived from Berkeley
#4.3 BSD under license from the Regents of the University of
#California.
#
#
#
#		Copyright Notice 
#
#Notice of copyright on this source code product does not indicate 
#publication.
#
#	(c) 1986,1987,1988,1989  Sun Microsystems, Inc
#	(c) 1983,1984,1985,1986,1987,1988,1989  AT&T.
#	          All rights reserved.

# Europe, updated from 4.3BSD and various contributors
# International country codes are used to identify countries' rules and
# zones
#
# 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 seismo!elsie!tz
# for general use in the future).  The use of 1986 as starting years below
# is conservative.
#
# One source shows that Bulgaria, Cyprus, Finland, and Greece observe DST from
# the last Sunday in March to the last Sunday in September in 1986.
# The source shows Romania changing a day later than everybody else.
#
# According to Bernard Sieloff's source, Poland is in the MET time zone but
# uses the WE DST rules.  The Western USSR uses EET+1 and ME DST rules.
# Bernard Sieloff's source claims Romania switches on the same day, but at
# 00:00 standard time (i.e., 01:00 DST).  It also claims that Turkey
# switches on the same day, but switches on at 01:00 standard time
# and off at 00:00 standard time (i.e., 01:00 DST)

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule    GB-Eire 1968    only    -       Feb     18      2:00s   1:00	BST
Rule    GB-Eire 1971    only    -       Oct     31      2:00s   0  	GMT
Rule    GB-Eire 1972    1980    -       Mar     Sun>=16 2:00s   1:00	BST
Rule    GB-Eire 1972    1980    -       Oct     Sun>=23 2:00s   0  	GMT
Rule    GB-Eire 1981    max     -       Mar     lastSun 1:00s   1:00	BST
Rule    GB-Eire 1981    max     -       Oct     Sun>=23 1:00s   0  	GMT

Rule	W-Eur	1986	max	-	Mar	lastSun	1:00s	1:00	" DST"
Rule	W-Eur	1986	max	-	Sep	lastSun	1:00s	0	-

Rule	M-Eur	1986	max	-	Mar	lastSun	2:00s	1:00	" DST"
Rule	M-Eur	1986	max	-	Sep	lastSun	2:00s	0	-

Rule	E-Eur	1986	max	-	Mar	lastSun	3:00s	1:00	" DST"
Rule	E-Eur	1986	max	-	Sep	lastSun	3:00s	0	-

Rule	Turkey	1986	max	-	Mar	lastSun	1:00	1:00	" DST"
Rule	Turkey	1986	max	-	Sep	lastSun	1:00	0	-

Rule	W-SU	1986	max	-	Mar	lastSun	2:00s	1:00	" DST"
Rule	W-SU	1986	max	-	Sep	lastSun	2:00s	0	-

# Zone	NAME		GMTOFF	RULES/SAVE	FORMAT	[UNTIL]
Zone    GB-Eire         0:00    GB-Eire         %s
Zone	WET		0:00	W-Eur		WET%s
Zone	Iceland		0:00	-		WET
Zone	MET		1:00	M-Eur		MET%s
Zone	Poland		1:00	W-Eur		MET%s
Zone	EET		2:00	E-Eur		EET%s
Zone	Turkey		3:00	Turkey		EET%s
Zone	W-SU		3:00	M-Eur		????

# Tom Hoffman says that MET is also known as Central European Time

Link	MET	CET

#
# And now, letters on the subject. . .
#
###############################################################################
#
# ...
# Date: Wed, 28 Jan 87 16:56:27 -0100
# From: seismo!mcvax!cgcha!wtho (Tom Hofmann)
# Message-Id: <8701281556.AA22174@cgcha.uucp>
# ...
# Subject: Time zone handling
# ...
# 
# ...the European time rules are...standardized since 1981, when
# most European counrties started DST.  Before that year, only
# a few countries (UK, France, Italy) had DST, each according
# to own national rules.  In 1981, however, DST started on
# 'Apr firstSun', and not on 'Mar lastSun' as in the following
# years...
# But also since 1981 there are some more national exceptions 
# than listed in 'europe': Switzerland, for example, joined DST 
# one year later, Denmark ended DST on 'Oct 1' instead of 'Sep 
# lastSun' in 1981---I don't know how they handle now.
# 
# Finally, DST ist always from 'Apr 1' to 'Oct 1' in the
# Soviet Union (as far as I know).  
# 
# Tom Hofmann, Scientific Computer Center, CIBA-GEIGY AG,
# 4002 Basle, Switzerland
# UUCP: ...!mcvax!cernvax!cgcha!wtho
#
###############################################################################
# 
# ...
# Date: Wed, 4 Feb 87 22:35:22 +0100
# From: seismo!mcvax!cwi.nl!dik (Dik T. Winter)
# Message-Id: <8702042135.AA23919@zuring.cwi.nl>
# ...
# Subject: timezones
# ...
# 
# The information from Tom Hofmann is (as far as I know) not entirely correct.
# After a request from chongo at amdahl I tried to retrieve all information
# about DST in Europe.  I was able to find all from about 1969.
# 
# ...standardization
# on DST in Europe started in about 1977 with switches on first Sunday in
# April and last Sunday in September.  In UK it was from last but 1 Sunday
# in march to last Sunday in October.  In 1981 UK joined Europe insofar that
# the starting day for both shifted to last Sunday in March.  And from 1982
# the whole of Europe used DST, with switch dates April 1 and October 1 in
# the Sovjet Union.  In 1985 the SU reverted to standard Europen switch
# dates.  Note that currently in the UK the switch back date appears not
# to be the last Sunday in October, but 4 weeks after the last Sunday in
# September (withness 1982 and 1983 with terminating days October 24 and 23).
# 
# It should also be remembered that time-zones are not constants; e.g.
# Portugal switched in 1976 from MET (or CET) to WET with DST, and the UK
# used MET throughout from 1967 to 1969, and WET with DST before and after
# that time.  Note also that though there were rules for switch dates not
# all countries abided to these dates, and many individual deviations
# occurred, though not since 1982 I believe.  Another note: it is always
# assumed that DST is 1 hour ahead of normal time, this need not be the
# case; at least in the Netherlands there have been times when DST was 2 hours
# in advance of normal time.
# 
# ...
# dik t. winter, cwi, amsterdam, nederland
# INTERNET   : dik@cwi.nl
# BITNET/EARN: dik@mcvax
############################################################################
#DATE: 03/07/94
#Re: GB-Eire
#
#    According to "Astronomical Information Sheet No.8", issued by
#    HM Nautical Almanac Office, Royal Greenwich Observatory, Cambridge,
#    England, the following rules apply:
#    
#            "...[after 1916 October 1] time in Ireland was synchronised
#            with that of Great Britain."
#    
#            [other rules before 1968 are left out since Unix's
#             Hour Zero is Jan. 1, 1970]
#    
#            "GMT + 1h was kept continuously from 1968 February 18 to
#            1971 October 31. ...[and called either British Summer Time
#    or
#            British Standard Time]..."
#    
#     "In 1972-1980 the following rule, from Section 1 of the Summer
#     Time Act 1972, applied:  Summer Time (GMT + 1h) is the period
#     from the day following the third Saturday in March ... to the
#     day following the fourth Saturday in October.  The change
#     occurs at 2 am GMT.
#    
#     "In 1981-1994 the following rule applies: Summer Time
#     (GMT + 1h) is the period from the last Sunday in March to the
#     day following the fourth Saturday in October.  The change
#     occurs at 1 am GMT.
#    
#     "For 1995 onwards the current rule for Summer Time will be
#     applied, unless amended under the terms of Section 2 of the
#     Summer Time Act." (Such an amendment has as yet not been
#     issued.)
