Jan. 26, 2009
9:48 p.m.
(But, why didn't [zic] just generate a POSIX rule string [for America/Godthab] like most of the files?)
POSIX time zone strings always use local time. Godthab transitions occur at 1:00 UCT on the last Sunday of March or October, at which point it's Saturday in Godthab. So Godthab transitions occur between the 24th and the 30th of the month--a range which can't be represented with a POSIX string (in which week 4 covers 22-28 and week 5 covers 25-31). --ado