Dear List, I have a question about the following data lines # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule RussiaAsia 1992 only - Mar lastSat 23:00 1:00 S Rule RussiaAsia 1992 only - Sep lastSat 23:00 0 - # i.e. Sep 26 Rule RussiaAsia 1993 max - Mar lastSun 2:00s 1:00 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Baku 3:00 1:00 BAKST 1991 Aug 30 # independence 3:00 RussiaAsia AZ%sT 1992 Sep lastSun 2:00s # i.e. Sep 27 4:00 - AZT 1996 # Azerbaijan time Now if I try to interprete these lines I get: from 1992 Mar to 1992 Sep 26 23:00 (local): GMTOFF= 3:00 and SAVE= 1:00 i.e. LOCALOFF= +4:00 ==> 1992 Sep 26 23:00 (local) == 1992 Sep 26 19:00 zulu from 1992 Sep 26 19:00 zulu to 1992 Sep 26 23:00 zulu: GMTOFF= LOCALOFF= +3:00 from 1992 Sep 26 23:00 zulu to 1996: GMTOFF= LOCALOFF= +4:00 This would mean a local offset change ocurred for only four hours. Is this correct? Best Regards, Klaus Schmid