The following rules apply to using SET TIME ZONE.
- You can set the default time zone for a session or user by specifying either a numeric offset from UTC or by specifying a time zone string literal.
- The range of time zone displacements permissible is -12:59 through +14.00 inclusive.
- The form for time zone displacement values is always INTERVAL HOUR TO MINUTE.
- The time zone string is associated with a session or user, not a time zone displacement. When a time zone displacement is needed in a request, that string plus a TIMESTAMP value or a TIME value, depending on which is appropriate, is used to determine the time zone displacement needed for a particular usage.