Gallery

When parsing the textual representation from the Exif
header into a Unix timestamp, the server time zone is
used. That is only correct if camera and server happen
to use the same time zone, which is not very likely
under travel and/or if your server is in a remote place.

Either the time zone should be handled explicitly when
parsing Exif data into a Unix datetime value or the
string in the Exif header should be reproduced "as is"
without refering to any time zone as that information
is not present in the header.

Previous discussion of this can be found in
http://gallery.menalto.com/node/49336, which also has
some suggestions for possible implementation of a fix.