SQL>
SQL> -- Time change from Chicago to Los Angeles.
SQL> SELECT TO_CHAR(NEW_TIME(TO_DATE('060297 01:00:00 AM', 'MMDDYY HH:MI:SS AM'), 'CDT','PDT'), 'DD-MON-YY HH:MI:SS AM') "Central to Pacific" from DUAL;
Central to Pacific
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01-JUN-97 11:00:00 PM
SQL>