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-rw-r--r--timezone/europe52
1 files changed, 45 insertions, 7 deletions
diff --git a/timezone/europe b/timezone/europe
index b87e31526d..6af29c44c3 100644
--- a/timezone/europe
+++ b/timezone/europe
@@ -1,4 +1,4 @@
-# @(#)europe 7.80
+# @(#)europe 7.81
# 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
@@ -196,7 +196,7 @@
# and extending this list, which can be found in
# <a href="http://student.cusu.cam.ac.uk/~jsm28/british-time/">
# History of legal time in Britain
-# </a> (2000-02-12).
+# </a>
# From Joseph S. Myers <jsm28@cam.ac.uk> (1998-01-06):
#
@@ -749,15 +749,53 @@ Zone Atlantic/Faeroe -0:27:04 - LMT 1908 Jan 11 # Torshavn
# In the military area near Thule and in Danmarkshavn DST will not be
# introduced.
-# From Paul Eggert (2001-09-29):
+# From Rives McDow (2001-11-01):
+#
+# I correspond regularly with the Dansk Polarcenter, and wrote them at
+# the time to clarify the situation in Thule. Unfortunately, I have
+# not heard back from them regarding my recent letter. [But I have
+# info from earlier correspondence.]
+#
+# According to the center, a very small local time zone around Thule
+# Air Base keeps the time according to UTC-4, implementing daylight
+# savings using North America rules, changing the time at 02:00 local time....
+#
+# The east coast of Greenland north of the community of Scoresbysund
+# uses UTC in the same way as in Iceland, year round, with no dst.
+# There are just a few stations on this coast, including the
+# Danmarkshavn ICAO weather station mentioned in your September 29th
+# email. The other stations are two sledge patrol stations in
+# Mestersvig and Daneborg, the air force base at Station Nord, and the
+# DPC research station at Zackenberg.
+#
+# Scoresbysund and two small villages nearby keep time UTC-1 and use
+# the same daylight savings time period as in West Greenland (Godthab).
+#
+# The rest of Greenland, including Godthab (this area, although it
+# includes central Greenland, is known as west Greenland), keeps time
+# UTC-3, with daylight savings methods according to European rules.
+#
+# It is common procedure to use UTC 0 in the wilderness of East and
+# North Greenland, because it is mainly Icelandic aircraft operators
+# maintaining traffic in these areas. However, the official status of
+# this area is that it sticks with Godthab time. This area might be
+# considered a dual time zone in some respects because of this.
+
+# From Rives McDow (2001-11-19):
+# I heard back from someone stationed at Thule; the time change took place
+# there at 2:00 AM.
+
+# From Paul Eggert (2001-11-19):
# The 1997 CIA map shows Danmarkshavn on GMT; the 1995 map as like Godthab.
# For lack of better info, assume they were like Godthab before 1996.
-# The 2000 IATA shows Thule as observing DST, so assume they stopped in 2001.
-
+# startkart.no says Thule does not observe DST, but this is clearly an error,
+# so go with Shanks for all Thule transitions.
#
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
-Rule Thule 1993 2000 - Apr Sun>=1 2:00 1:00 D
-Rule Thule 1993 2000 - Oct lastSun 2:00 0 S
+Rule Thule 1991 1992 - Mar lastSun 2:00 1:00 D
+Rule Thule 1991 1992 - Sep lastSun 2:00 0 S
+Rule Thule 1993 max - Apr Sun>=1 2:00 1:00 D
+Rule Thule 1993 max - Oct lastSun 2:00 0 S
#
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Danmarkshavn -1:14:40 - LMT 1916 Jul 28