Either I am exceptionally confused, or the documentation in 8.5.3 appears to be wrong. Could someone clarify what I'm missing? The documentation states: "In short, this is the difference between abbreviations and full names: abbreviations always represent a fixed offset from UTC, whereas most of the full names imply a local daylight-savings time rule, and so have two possible UTC offsets." "PST" is given as a specific example of an abbreviation in this case. But it appears that using "PST" gives you a time zone rule: CREATE TABLE t ( z TIMESTAMP WITH TIME ZONE ); insert into t values ( '2011-03-13 01:00 PST'::timestamptz); insert into t values ( '2011-03-13 01:00-7'::timestamptz ); update t set z = z + '2 hours'::interval; select * from t; z ------------------------ 2011-03-13 04:00:00-07 2011-03-13 03:00:00-07 (2 rows) -- But if "PST" really did imply a fixed offset, shouldn't the results be the same? -- -- Christophe Pettus xof@xxxxxxxxxxxx -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general