# select to_char('2016-01-20 00:00'::timestamp at time zone 'Europe/Lisbon', 'TZ'); to_char --------- GMT (1 row)
It should be WET, "Western European Time". Is there something I'm doing wrong?
Actually your input is now interpretted as being timezone Europe/Lisbon but to_char still converts it to a string for the timezone that is currently set on your connection. When I do (my connection is set to Europe/Amsterdam)
select to_char('2016-01-20 00:00'::timestamp at time zone 'Europe/Lisbon', 'HH:MI TZ');
I get 01:00 CET because it has converted it from Europe/Lisbon to CET.
You can adjust the timezone which is used for display by to_char with