SESSIONTIMEZONE
The SESSIONTIMEZONE function returns the time zone of the current session.
Return Values
A time zone offset (a character type in the format '[+|]TZH:TZM'
) or a time zone region name, depending on how the user specified the session time zone value in the most recent ALTER SESSION statement
Examples
Example 8-96 Retrieving the Session Time Zone
SHOW SESSIONTIMEZONE
-05:00