Time Zone Configuration
The TIMEZONE parameter in the CES_PARAMETERS database table specifies the name of the time zone used to display ERT update entries in Event Log.
A list of the time zone region names known to the database can be obtained from the V$TIMEZONE_NAMES dynamic performance view. Time zone region name should be used instead of a simple offset to ensure that Daylight Savings Time is accounted for.
Example
INSERT INTO CES_PARAMETERS (APP, ATTRIB, VALUE) VALUES
('NMS', 'TIMEZONE', 'America/Chicago');