Dev Kumkar <devdas(dot)kumkar(at)gmail(dot)com> writes:
> I want to change the timezone to Europe/Moscow. Moscow timezone is changing
> from +4 to +3
You'd want to get a new version of the IANA timezone database files for
that. Depending on what packaging you're using, this might be an
operating-system update not a Postgres update. If you are relying
on the Postgres copies, you'd have to update src/timezone/data/ and
then do a "make install" in src/timezone.
regards, tom lane