Hello again :) Can someone please explain this: Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Europe/Dublin -0:25:00 - LMT 1880 Aug 2 -0:25:21 - DMT 1916 May 21 2:00 -0:25:21 1:00 IST 1916 Oct 1 2:00s The last line has -0:25:21 min as the GMT offset - is it possible that the rule name is "1:00" ? Lines 428-430 in the europe file. Thank you much, Srdjan