It seems two things that you're missing - you need to adjust for the Germany/Berlin timezone (GMT+1), and you also (still) need to figure out when DST is active (which accounts for the two hours difference in September).

I think DateTime comes with the Olson database embedded, but maybe there are less heavyweight approaches to correcting the timestamp for DST.

In reply to Re^3: Date::Calc and and daylight savings time by Corion
in thread Date::Calc and and daylight savings time by marek1703

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