> > DST is different in different timezones, and at some points the overlap will cause a bug when interacting with other systems > That's mostly just an argume

> > DST is different in different timezones, and at some points the overlap will cause a bug when interacting with other systems > That's mostly just an argument for using the same timezone in all of your systems. The TZ database is not static. Governments have a habit of monkeying with DST definitions to suit their whims. Several of your systems may have TZ updates come out at different times. Debian/java/erlang/windows have different rollouts for the TZ database that you have to coordinate somehow if you want all your systems to agree on the time/date. Just use UTC.