Thread:Project:Support desk/Fatal exception of type TimestampException after upgrading to Mediawiki 1.22/reply (9)

Yeah, that should really work.

I just learned that your previous date format means something like "Central European Time, 1 hour east from Greenwich, daylight saving starts on the  last  Sunday  in  March  and ends on the last Sunday in October at 3 AM.

Btw: You have specified a date, but not a time for the start of summertime; I guess that should then be "M3.5.0/2" for 2 o'clock. can you test, if that value works:

CET-1CEST,M3.5.0/2,M10.5.0/3