Thanks for looking up the U of Iceland Almanak. Here's how I translated what you wrote into tzfile format; I'll include this in the next set of revisions that I propose to ado. # Iceland # # From Adam David <adam@veda.is> (November 6, 1993): # The name of the timezone in Iceland for system / mail / news purposes is GMT. # # (December 5, 1993): # This material is paraphrased from the 1988 edition of the University of # Iceland Almanak. # # From January 1st, 1908 the whole of Iceland was standardised at 1 hour # behind GMT. Previously, local mean solar time was used in different parts # of Iceland, the almanak had been based on Reykjavik mean solar time which # was 1 hour and 28 minutes behind GMT. # # "first day of winter" referred to [below] means the first day of the 26 weeks # of winter, according to the old icelandic calendar that dates back to the # time the norsemen first settled Iceland. The first day of winter is always # Saturday, but is not dependent on the Julian or Gregorian calendars. # # From Paul Eggert <eggert@twinsun.com> (December 9, 1993): # The Iceland Almanak, Shanks and Whitman disagree on many points. # We go with the Almanak, except for two claims from Shanks: # 1. In 1968 standard time wasn't switched to GMT until Oct 27; # this affects only the time zone name and dst flag. # 2. Reykavik was -1:28 from 1837 to 1908, local mean time before that. # # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Iceland 1908 only - Jan 1 0:00 0 S Rule Iceland 1917 1918 - Feb 19 23:00 1:00 D Rule Iceland 1917 only - Oct 21 1:00 0 S Rule Iceland 1918 only - Nov 16 1:00 0 S Rule Iceland 1939 only - Apr 29 23:00 1:00 D Rule Iceland 1939 only - Nov 29 2:00 0 S Rule Iceland 1940 only - Feb 25 2:00 1:00 D Rule Iceland 1940 only - Nov 3 2:00 0 S Rule Iceland 1941 only - Mar 2 1:00s 1:00 D Rule Iceland 1941 only - Nov 2 1:00s 0 S Rule Iceland 1942 only - Mar 8 1:00s 1:00 D Rule Iceland 1942 only - Oct 25 1:00s 0 S # 1943-1946 - first Sunday in March until first Sunday in winter Rule Iceland 1943 1946 - Mar Sun>=1 1:00s 1:00 D Rule Iceland 1943 1948 - Oct Sun>=22 1:00s 0 S # 1947-1967 - first Sunday in April until first Sunday in winter Rule Iceland 1947 1968 - Apr Sun>=1 1:00s 1:00 D # 1949 Oct transition delayed by 1 week Rule Iceland 1949 only - Oct 30 1:00s 0 S Rule Iceland 1950 1966 - Oct Sun>=22 1:00s 0 S Rule Iceland 1967 only - Oct 29 1:00s 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Atlantic/Reykjavik -1:27:24 - LMT 1837 -1:28 - RMT 1908 # Reykjavik Mean Time -1:00 Iceland I%sT 1968 Oct 27 1:00s 0:00 - GMT