Update.

2000-02-21  Andreas Jaeger  <aj@suse.de>

	* sysdeps/unix/sysv/linux/bits/in.h (IPV6_RXSRCRT): Renamed to
	IPV6_RTHDR; added IPV6_RTHDR_LOOSE, IPV6_RTHDR_STRICT and
	IPV6_RTHDR_TYPE_0 to synch with RFC 2292.
	* sysdeps/generic/bits/in.h: Likewise.

2000-02-21  Ulrich Drepper  <drepper@redhat.com>

	* po/gl.po: Update from translation team.

	* timezone/antarctica: Update from tzdata2000b.
	* timezone/asia: Likewise.
	* timezone/australasia: Likewise.
	* timezone/europe: Likewise.

	* malloc/malloc.c (vALLOc): Call ptmalloc_init before mEMALIGn
	call to initialize malloc_getpagesize.
	(pvALLOc): Likewise.

4 files changed, 77 insertions, 621 deletions

diff --git a/timezone/antarctica b/timezone/antarctica
index 38bcd899be..04613f46b6 100644
--- a/timezone/antarctica
+++ b/timezone/antarctica
@@ -1,4 +1,4 @@
-# @(#)antarctica	7.17
+# @(#)antarctica	7.18
 
 # From Paul Eggert (1999-11-15):
 # To keep things manageable, we list only locations occupied year-round; see
@@ -47,6 +47,10 @@ Rule	ChileAQ	2000	max	-	Mar	Sun>=9	0:00	0	-
 # Australia - territories
 # Heard Island, McDonald Islands (uninhabited)
 #	previously sealers and scientific personnel wintered
+#	<a href="http://www.dstc.qut.edu.au/DST/marg/daylight.html">
+#	Margaret Turner reports
+#	</a> (1999-09-30) that they're UTC+5, with no DST;
+#	presumably this is when they have visitors.
 #
 # year-round bases
 # Casey, Bailey Peninsula, -6617+11032, since 1969
@@ -210,7 +214,7 @@ Rule	NZAQ	1990	max	-	Mar	Sun>=15	2:00s	0	S
 # Rothera, Adelaide Island, -6734-6808, since 1976-12-01
 
 # Uruguay - year round base
-# Artigas, King George Island, -9621104-0585107
+# Artigas, King George Island, -621104-0585107
 
 # USA - year-round bases
 #
diff --git a/timezone/asia b/timezone/asia
index 7f6338923f..8f0a6cd833 100644
--- a/timezone/asia
+++ b/timezone/asia
@@ -1,4 +1,4 @@
-# @(#)asia	7.51
+# @(#)asia	7.54
 
 # 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
@@ -526,7 +526,7 @@ Rule	Zion	1988	only	-	Apr	 9	0:00	1:00	D
 Rule	Zion	1988	only	-	Sep	 3	0:00	0	S
 
 # From Ephraim Silverberg <ephraim@cs.huji.ac.il>
-# (1997-03-04, 1998-03-16 and 1998-12-28):
+# (1997-03-04, 1998-03-16, 1998-12-28, and 2000-01-17):
 
 # According to the Office of the Secretary General of the Ministry of
 # Interior, there is NO set rule for Daylight-Savings/Standard time changes.
@@ -540,7 +540,11 @@ Rule	Zion	1988	only	-	Sep	 3	0:00	0	S
 # conflicts with the Jewish New Year.  Starting in 1999, the change to
 # daylight savings time will still be on a Friday morning but from
 # 2 a.m. IST to 3 a.m. IDT; furthermore, the change back to standard time
-# will now also be on a Friday morning from 2 a.m. IDT to 1 a.m. IST.
+# will now also be on a Friday morning from 2 a.m. IDT to 1 a.m. IST for
+# 1999 only.  In the years from 2000 to 2002, the change back will be from
+# 2 a.m. IDT to 1 a.m. IST the morning after the Jewish festival of
+# Shmini Atzeret (i.e. the morning of the 23rd of Tishrei in the lunar
+# Hebrew calendar).
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	Zion	1989	only	-	Apr	30	0:00	1:00	D
@@ -588,18 +592,29 @@ Rule	Zion	1998	only	-	Sep	 6	0:00	0	S
 Rule	Zion	1999	only	-	Apr	 2	2:00	1:00	D
 Rule	Zion	1999	only	-	Sep	 3	2:00	0	S
 
-# Due to imminent elections in 1999, there are no dates for the year 2000
-# and beyond.  There was a move to legislate the DST rules in Israel, but
-# due to the government's fall, it most likely won't be brought to the Knesset
-# for first reading before the elections and will probably be altered by the
-# newly elected government.
+# Minister of Interior, Natan Sharansky, has announced the dates for
+# the years 2000-2002.  However, sources inside the ministry have noted
+# that the end date of 2000 and both dates of 2001-2002 should be regarded
+# as tentative pending final approval.
+#
+# The official announcement for the years 2000-2001 can be viewed at:
+#
+#	ftp://ftp.huji.ac.il/pub/tz/announcements/2000-2002.ps.gz
 
-# From Paul Eggert (1999-01-30):
-# Here are guesses for rules after 1999.
+# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
+Rule	Zion	2000	only	-	Apr	14	2:00	1:00	D
+Rule	Zion	2000	only	-	Oct	22	2:00	0	S
+Rule	Zion	2001	only	-	Apr	 6	2:00	1:00	D
+Rule	Zion	2001	only	-	Oct	10	2:00	0	S
+Rule	Zion	2002	only	-	Mar	29	2:00	1:00	D
+Rule	Zion	2002	only	-	Sep	29	2:00	0	S
+
+# From Paul Eggert (2000-01-17):
+# Here are guesses for rules after 2002.
 # They are probably wrong, but they are more likely than no DST at all.
 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
-Rule	Zion	2000	max	-	Apr	Fri>=1	2:00	1:00	D
-Rule	Zion	2000	max	-	Sep	Fri>=1	2:00	0	S
+Rule	Zion	2003	max	-	Mar	Fri>=25	2:00	1:00	D
+Rule	Zion	2003	max	-	Oct	 1	2:00	0	S
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Asia/Jerusalem	2:20:56 -	LMT	1880
diff --git a/timezone/australasia b/timezone/australasia
index ebe2951416..70ac421be1 100644
--- a/timezone/australasia
+++ b/timezone/australasia
@@ -1,4 +1,4 @@
-# @(#)australasia	7.54
+# @(#)australasia	7.55
 # This file also includes Pacific islands.
 
 # Notes are at the end of this file
@@ -151,11 +151,13 @@ Zone Australia/Broken_Hill 9:25:48 -	LMT	1895 Feb
 Rule	LH	1981	1984	-	Oct	lastSun	2:00s	1:00	-
 Rule	LH	1982	1985	-	Mar	Sun>=1	2:00s	0	-
 Rule	LH	1985	only	-	Oct	lastSun	2:00s	0:30	-
-Rule	LH	1986	1991	-	Mar	Sun>=15	2:00s	0	-
+Rule	LH	1986	1989	-	Mar	Sun>=15	2:00s	0	-
 Rule	LH	1986	only	-	Oct	19	2:00s	0:30	-
-Rule	LH	1987	max	-	Oct	lastSun	2:00s	0:30	-
-Rule	LH	1992	1995	-	Mar	Sun>=1	2:00s	0	-
+Rule	LH	1987	1999	-	Oct	lastSun	2:00s	0:30	-
+Rule	LH	1990	1995	-	Mar	Sun>=1	2:00s	0	-
 Rule	LH	1996	max	-	Mar	lastSun	2:00s	0	-
+Rule	LH	2000	only	-	Aug	lastSun	2:00s	0:30	-
+Rule	LH	2001	max	-	Oct	lastSun	2:00s	0:30	-
 Zone Australia/Lord_Howe 10:36:20 -	LMT	1895 Feb
 			10:00	-	EST	1981 Mar
 			10:30	LH	LHST
@@ -164,7 +166,7 @@ Zone Australia/Lord_Howe 10:36:20 -	LMT	1895 Feb
 #
 # Ashmore Is, Cartier
 # no indigenous inhabitants; only seasonal caretakers
-# no information; probably like Australia/Perth
+# like Australia/Perth, says Turner
 #
 # Coral Sea Is
 # no indigenous inhabitants; only meteorologists
@@ -173,10 +175,7 @@ Zone Australia/Lord_Howe 10:36:20 -	LMT	1895 Feb
 # Macquarie
 # permanent occupation (scientific station) since 1948;
 # sealing and penguin oil station operated 1888/1917
-# <a href="http://www.bom.gov.au/faq/faqgen.htm">
-# The Australian Bureau of Meteorology FAQ
-# </a> (1999-09-27) writes that Macquarie Island follows Tasmanian practice
-# irrespective of any local use of DST.  This is unclear; ignore it for now.
+# like Australia/Hobart, says Turner
 
 # Christmas
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
@@ -505,6 +504,10 @@ Zone	Pacific/Wallis	12:15:20 -	LMT	1901
 
 # Australia
 
+# <a href="http://www.dstc.qut.edu.au/DST/marg/daylight.html">
+# Australia's Daylight Saving Times
+# </a>, by Margaret Turner, summarizes daylight saving issues in Australia.
+
 # From John Mackin (1991-03-06):
 # We in Australia have _never_ referred to DST as `daylight' time.
 # It is called `summer' time.  Now by a happy coincidence, `summer'
@@ -843,11 +846,19 @@ Zone	Pacific/Wallis	12:15:20 -	LMT	1901
 # Lord Howe Island is located off the New South Wales coast, and is half an
 # hour ahead of NSW time.
 
-# From Paul Eggert (1995-12-19):
-# For Lord Howe we use Shanks through 1991.
-# Lord Howe is part of NSW, so we'll guess it has used the same transition
-# times as NSW since 1991, even though Shanks writes that Lord Howe went
-# with Victoria when NSW and Victoria disagreed in 1982.
+# From James Lonergan, Secretary, Lord Howe Island Board (2000-01-27):
+# Lord Howe Island summer time in 2000/2001 will commence on the same
+# date as the rest of NSW (i.e. 2000-08-27).  For your information the
+# Lord Howe Island Board (controlling authority for the Island) is
+# seeking the community's views on various options for summer time
+# arrangements on the Island, e.g. advance clocks by 1 full hour
+# instead of only 30 minutes.  Dependant on the wishes of residents
+# the Board may approach the NSW government to change the existing
+# arrangements.  The starting date for summer time on the Island will
+# however always coincide with the rest of NSW.
+
+# From Paul Eggert (2000-01-31):
+# For Lord Howe we use Shanks through 1989, and Lonergan thereafter.
 
 ###############################################################################
 
diff --git a/timezone/europe b/timezone/europe
index d97f2250f9..e0bd741afd 100644
--- a/timezone/europe
+++ b/timezone/europe
@@ -1,4 +1,4 @@
-# @(#)europe	7.67
+# @(#)europe	7.69
 
 # 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
@@ -162,586 +162,15 @@
 
 # Howse writes (p 157) `DBST'; let's assume this is a typo.
 
-# From Peter Ilieve <peter@aldie.co.uk> (1998-04-19):
-# The following list attempts to show the complete history of Summer Time
-# legislation in the United Kingdom, and has quite a bit to say about
-# the Isle of Man and the Channel Islands as well.
-#
-# Things that I have not personally seen are marked (???). Things that
-# I haven't seen but Joseph Myers has are marked (jsm). The problem
-# with finding old Orders (rather than Acts) is that nobody seems to
-# keep the actual documents themselves, not even the Government. They
-# get bound into annual volumes, which are published, but by the time
-# this happens the Orders are mainly spent as the years they refer
-# to have come and gone, so they don't get included in the annual
-# volumes.
-#
-# Thanks are due to my learned legal friend Lorna Montgomerie, who dug out
-# the dusty old statutes, to Melanie Allison of the Ministry of Defence,
-# who provided the wartime regulations and a snippet of Hansard explaining
-# why double summer time started on a Monday in 1945 (it was Easter),
-# and to Joseph Myers <jsm28@cam.ac.uk>, who tracked down the Orders
-# up to 1945, some of the old Acts, and the first five EC Directives.
-#
-# Some definitions:
-#
-# Great Britain: England, Scotland and Wales
-# United Kingdom: Great Britain plus Ireland (up to 1922) or Northern
-# Ireland (since 1922)
-# S.I.: Statutory Instrument, the modern name for secondary legislation
-# S.R.&O.: Statutory Rules and Orders, the older name for secondary legislation
-#
-# Unless otherwise specified, Acts and secondary legislation are assumed
-# to apply throughout the United Kingdom, but not to the Isle of Man
-# or the Channel Islands.
-#
-# Some of the Acts and Orders I found in various libraries, and I don't
-# have copies. When I looked at them I was looking for dates and not things
-# like whether they applied to the Bailiwick of Jersey. I will try to
-# check these documents again.
-#
-# ---
-#
-# - The Statutes (Definition of Time) Act, 1880 (43 & 44 Vict. c. 9)
-#
-# Defined Greenwich mean time to be the standard time in Great Britain
-# and Dublin mean time to be the standard time in Ireland, superseding
-# various forms of local mean time.
-#
-# - The Statutory Time Act, 1883 (???)
-#
-# An Act of Tynwald, the Isle of Man Parliament. It appears to have
-# defined the standard time on the Isle of Man as GMT but as I haven't
-# seen it I don't know if it used Greenwich mean time, some other definition,
-# or just said that Isle of Man time would be the same as in Great Britain.
-#
-# - The Isle of Man (War Legislation) Act, 1914 (4 & 5 Geo. 5. c. 62)
-#
-# Gives the power, by Order in Council, to extend wartime legislation
-# to the Isle of Man.
-#
-# - The Summer Time Act, 1916 (6 & 7 Geo. 5. c. 14)
-#
-# Introduced Summer Time for the first time, in Great Britain and Ireland.
-# Specified a one hour offset from GMT (DMT in Ireland), dates of
-# Sunday 21 May and Sunday 1 October and times of 02:00 (GMT/DMT).
-# Gave a power to make Orders in subsequent years, for the duration
-# of the then current war.
-#
-# - The Time (Ireland) Act, 1916 (6 & 7 Geo. 5. c. 45)
-#
-# This abolished Dublin mean time at 02:00 DMT on Sunday 1 October 1916,
-# bringing the whole of the United Kingdom onto GMT. As Ireland was behind
-# GMT/BST at 02:00 DMT on 1 Oct Great Britain had already put the clocks back.
-# Using Paul Eggert's suggestion of IST for Irish Summer Time and the figure
-# derived from Whitman for the offset of IST from GMT (00:34:39) the sequence
-# would have been:
-# Dublin        London
-# 02:34:38 IST  02:59:59 BST
-# 02:34:39 IST  02:00:00 GMT
-# 02:59:59 IST  02:25:20 GMT
-# 02:25:21 GMT  02:25:21 GMT
-# with the transition 03:00:00 IST -> 02:00:00 DMT -> 02:25:21 GMT all at once.
-#
-# - S.R.&O. 1916, No. 382
-#
-# An Order made under the Isle of Man (War Legislation) Act, 1914
-# extending the Summer Time Act, 1916 to the Isle of Man. Dated
-# 23 May 1916, two days after the start of Summer Time, but it says that
-# the Act is deemed to have taken effect in the Isle of Man at the same
-# time as it took effect in the United Kingdom.
-#
-# - S.R.&O. 1917, No. 362
-#
-# An Order made under the Summer Time Act, 1916 giving dates
-# for Summer Time in 1917 of Sunday 8 April to Monday 17 September,
-# both at 02:00 GMT. Note that Summer Time ends on a Monday.
-#
-# - S.R.&O. 1917, No. 358
-#
-# An Order made under the Summer Time (Isle of Man) Act, 1916
-# (the thing created by S.R.&O. 1916, No. 382) specifying the same
-# dates of 8 April to 17 September, at 02:00 GMT for the Isle of Man.
-#
-# - S.R.&O. 1918, No. 274
-#
-# An Order made under the Summer Time Act, 1916 giving dates
-# for Summer Time in 1918 of Sunday 24 March to Monday 30 September,
-# both at 02:00 GMT.
-#
-# - S.R.&O. 1918, No. 429
-#
-# The matching Isle of Man Order for 1918 with the same dates and times.
-#
-# - The Termination of the Present War (Definition) Act, 1918
-#   (8 & 9 Geo. 5. c. 59)
-#
-# This gave power to specify a legal end date for the war just ended,
-# which would affect things like the Summer Time Act, 1916, which applied
-# only in wartime. This date was to be close to the date of formal
-# ratification of the treaty or treaties of peace.
-#
-# - S.R.&O. 1919, No. 297
-#
-# An Order made under the Summer Time Act, 1916 giving dates
-# for Summer Time in 1919 of Sunday 30 March to Monday 29 September,
-# both at 02:00 GMT.
-#
-# - S.R.&O. 1919, No. 366
-#
-# The matching Isle of Man Order for 1919 with the same dates and times.
-#
-# - S.R.&O. 1920, No. 458
-#
-# An Order made under the Summer Time Act, 1916 giving dates
-# for Summer Time in 1920 of Sunday 28 March to Monday 27 September,
-# both at 02:00 GMT.
-#
-# - S.R.&O. 1920, No. 573
-#
-# The matching Isle of Man Order for 1920 with the same dates and times.
-#
-# - S.R.&O. 1920, No. 1844
-#
-# An Order modifying both S.R.&O. 1920, No. 458 and S.R.&O. 1920, No. 573 to
-# change the end date for Summer Time from Monday 27 September to
-# Monday 25 October (the time remaining 02:00 GMT). The 1989 Green
-# Paper (Cm 722) says this was done because of a coal strike.
-#
-# - The War Emergency Laws (Continuance) Act, 1920 (10 Geo. 5. c. 5)
-#
-# This extends the power to make Orders under the Summer Time Act, 1916
-# for a period of 12 months after the termination of the war.
-# Came into force on 31 March 1920. Although the war had been over for more
-# than 12 months by then the legal end date had not yet been set.
-#
-# - S.R.&O. 1921, No. 363
-#
-# An Order made under the Summer Time Act, 1916 and the War
-# Emergency Laws (Continuance) Act, 1920 giving dates for Summer Time
-# in 1921 of Sunday 3 April to Monday 3 October, both at 02:00 GMT.
-#
-# - S.R.&O. 1921, No. 364
-#
-# The matching Isle of Man Order for 1921 with the same dates and times.
-#
-# - S.R.&O. 1922, No. 264
-#
-# An Order made under the Summer Time Act, 1916 and the War
-# Emergency Laws (Continuance) Act, 1920 giving dates for Summer Time
-# in 1921 of Sunday 26 March to Sunday 8 October, both at 02:00 GMT.
-# It also mentions the arrangements for defining the legal end date
-# for the late war. An Order was made on 10 August 1921, under the
-# Termination of the Present War (Definition) Act, 1918, setting
-# a date of 31 August 1921. This means the powers of the Summer Time
-# Act, 1916 would finally expire on 31 August 1922.
-#
-# - S.R.&O. 1922, No. 290 (???)
-#
-# This is probably the matching Isle of Man Order.
-#
-# - The Summer Time Act, 1922 (12 & 13 Geo. 5. c. 22)
-#
-# This specifies an offset of 1 hour and dates of the day after the third
-# Saturday in April, unless that be Easter, in which case it is the day after
-# the second Saturday, and the day after the third Saturday in September.
-# The time is 02:00 GMT. It applied in 1922 and 1923, and longer if Parliament
-# so approved. It applied to the Isle of Man and the Channel Islands as well.
-# Came into Force on 20 July 1920. Note the reversion to ending on a Sunday.
-#
-# - S.R.&O. 1922, No. 1205
-#
-# An Order made under the War Emergency Laws (Continuance) Act, 1920
-# dated 13 October 1922. It revokes (among other things) the Order extending
-# the Summer Time Act, 1916 to the Isle of Man.
-#
-# - The Expiring Laws Continuance Act, 1923 (13 & 14 Geo. 5. c. 37)
-#
-# This extended the Summer Time Act, 1922 (among other things) until
-# 31 December 1924.
-#
-# - The Expiring Laws Continuance Act, 1924 (15 Geo. 5. c. 1) (jsm)
-#
-# This further extended the Summer Time Act, 1922 (among other things) until
-# 31 December 1925.
-#
-# - The Time Act (Northern Ireland), 1924 (14 & 15 Geo. 5. c. 24 (N.I.))
-#
-# This Act says that while it remains in force, any Act or Order relating
-# to the time for general purposes in Great Britain shall also apply
-# in Northern Ireland, and the Time (Ireland) Act, 1916 shall have effect
-# accordingly.
-#
-# - The Summer Time Act, 1925 (15 & 16 Geo. 5. c. 64)
-#
-# This makes the 1922 Act permanent, with a change to the end date to the
-# day after the first Saturday in October. Came into force on 7 August 1925.
-#
-# - The Emergency Powers (Defence) Act, 1939 (2 & 3 Geo. 6. c. 62) (???)
-#
-# I haven't seen this one. It presumably gave the Government powers to
-# do all manner of things during the newly started war.
-#
-# - The Defence (Summer Time) Regulations, 1939, S.R.&O. 1939, No. 1379
-#
-# These were made under the Emergency Powers (Defence) Act, 1939.
-# They change the end date to be the day after the third Saturday in November.
-#
-# - S.R.&O. 1940, No. 172
-#
-# An Order in Council amending the Defence (Summer Time) Regulations, 1939.
-# It changed the start date to the day after the fourth Saturday in February
-# (ie. 25 Feb 1940).
-#
-# - S.R.&O. 1940, No. 1883
-#
-# Another Order amending the Defence (Summer Time) Regulations, 1939.
-# This continues summer time throughout the year after it starts in 1940.
-#
-# - S.R.&O. 1941, No. 476
-#
-# Another Order amending the Defence (Summer Time) Regulations, 1939.
-# This introduces double summer time, starting at 01:00 GMT on the day after
-# the first Saturday in May and ending at 01:00 GMT on the day after the
-# second Saturday in August, offset another hour from normal summer time,
-# which continues throughout the rest of the year.
-#
-# - S.R.&O. 1942, No. 506
-#
-# Another Order amending the Defence (Summer Time) Regulations, 1939.
-# This changes the start date of Double Summer Time to the day after the first
-# Saturday in April, bringing it forward from May.
-#
-# - S.R.&O. 1944, No. 932
-#
-# Another Order amending the Defence (Summer Time) Regulations, 1939.
-# This changed the end date of Double Summer Time to the day after the
-# third Saturday in September (ie. 17 September 1944).
-#
-# - S.R.&O. 1945, No. 312
-#
-# Another Order amending the Defence (Summer Time) Regulations, 1939.
-# This changes the start and end dates of Double Summer Time to the
-# day after the first Sunday in April and the day after the second Saturday
-# in July (ie. Mon 2 April to Sun 15 July).
-#
-# I have this quote from Hansard (the official record of the United Kingdom
-# Parliament), Oral Answers, 1 March 1945, cols 1559--60, explaining the
-# unusual start on a Monday:
-#
-#  `58. Major Sir Goronwy Owen asked the Secretary of State for the Home
-#   Department if he is now able to state the Government's proposals
-#   regarding double summer time.
-#
-#   [two other similar questions omitted]
-#
-#   Mr. H. Morrison: The Government, in reviewing the matter, have
-#   considered, [...] the conclusion has been reached that the adoption of
-#   double summer time from the beginning of April is essential to the
-#   maintenance of the war effort. [...] As 1st April is Easter Sunday,
-#   when very early services are held in many churches, it is proposed that
-#   double summer time shall start not in the night preceding Easter
-#   Sunday, but in the night of Sunday-Monday so that it will operate from
-#   Monday, 2nd April.'
-#
-# - S.R.&O. 1945, No. 1208
-#
-# An Order under the Emergency Powers (Defence) Acts, 1939 and 1940 revoking
-# a long list of things, including the Defence (Summer Time) Regulations, 1939.
-# This meant that Summer Time reverted to being set by the 1922 and 1925 Acts.
-# It was made on 28 September, early enough to end Summer Time on the
-# date defined by the 1925 Act: 7 October.
-#
-# - The Summer Time Act, 1947 (10 & 11 Geo. 6. c. 16)
-#
-# Came into force on 11 March 1947. Amended the Summer Time Acts, 1922 and
-# 1925 to change the dates of Summer Time and to introduce Double Summer Time
-# (although it doesn't give this, or any, name for this period of 2 hour
-# offset from GMT). Dates are given for 1947 only and are: 02:00 GMT Sunday
-# 16 March, 01:00 GMT Sunday 13 April, 01:00 GMT Sunday 10 August, and 02:00
-# Sunday 2 November. It gave a power to make Orders for subsequent years,
-# both to vary the dates and to continue Double Summer Time. It applied
-# to the Isle of Man and the Channel Islands.
-#
-# - Summer Time Order, 1948 (S.I. 1948/495)
-#
-# An Order made under the Summer Time Act, 1947. Gave dates for 1948 of
-# 14 March and 31 October, both at 02:00 GMT.
-#
-# Although the 1947 Act had legislated for Double Summer Time, this was
-# not continued after 1947.
-#
-# - Summer Time Order, 1949 (S.I. 1949/373)
-#
-# Another Order made under the Summer Time Act, 1947. Gave dates for 1949
-# of 3 April and 30 October, both at 02:00 GMT.
-#
-# - Summer Time Order, 1950 (S.I. 1950/518)
-#
-# Another Order made under the Summer Time Act, 1947. Gave dates for 1950
-# of 16 April and 22 October, both at 02:00 GMT.
-#
-# - Summer Time Order, 1951 (S.I. 1951/430)
-#
-# Another Order made under the Summer Time Act, 1947. Gave dates for 1951
-# of 15 April and 21 October, both at 02:00 GMT.
-#
-# - Summer Time Order, 1952 (S.I. 1952/451)
-#
-# Another Order made under the Summer Time Act, 1947. Gave dates for 1952
-# of 20 April and 26 October, both at 02:00 GMT.
-#
-# This is the last of this run of Orders, so for 1953 things reverted
-# to the 1922 and 1925 Acts.
-#
-# - The Interpretation Act (Northern Ireland), 1954 (1954 c. 33 (N.I.)) (???)
-#
-# I presume that section 39 of this Act is similar to section 9 of the
-# Interpretation Act, 1978 (listed below) in specifying GMT as the
-# legal time in Northern Ireland, replacing the Time (Ireland) Act, 1916.
-#
-# - Summer Time Order, 1961 (S.I. 1961/71)
-#
-# Specified dates of 26 March and 29 October (02:00 GMT) for 1961
-#
-# - Summer Time (1962) Order, 1961 (S.I. 1961/2465)
-#
-# Specified dates of 25 March to 28 October (02:00 GMT) for 1962.
-#
-# - Summer Time Order, 1963 (S.I. 1963/81)
-#
-# Specified dates of 31 March to 27 October (02:00 GMT) for 1963.
-#
-# - Summer Time (1964) Order, 1963 (S.I. 1963/2101)
-#
-# Specified dates of 22 March to 25 October (02:00 GMT) for 1964.
-#
-# - Summer Time Order, 1964 (S.I. 1964/1201)
-#
-# Specified dates for three years (all 02:00 GMT):
-#   1965: 21 March to 24 October
-#   1966: 20 March to 23 October
-#   1967: 19 March to 29 October
-#
-# - Summer Time Order, 1967 (S.I. 1967/1148)
-# - Summer Time Order, 1968 (S.I. 1968/117)
-#
-# The first of these specifies dates for 1968 of 18 February for the United
-# Kingdom but 7 April for the Isle of Man, both ending on 27 October,
-# all at 02:00 GMT. The second Order changes the Isle of Man start date
-# to 18 February to match the United Kingdom.
-#
-# - The British Standard Time Act 1968 (1968 c. 45)
-#
-# This came into force on 27 October 1968 and continued summer time throughout
-# the year. It expired at 02:00 GMT on 31 October 1971, as specified in the
-# Ac