timestamp and datetime in mysql both stored without timezone code example
Example: mysql datetime with timezone offset
INSERT INTO table_name CONVERT_TZ(SUBSTR('2011-10-04 12:58:36 -0600',1,19),'+00:00',SUBSTR('2011-10-04 12:58:36 -0600',20));
INSERT INTO table_name CONVERT_TZ(SUBSTR('2011-10-04 12:58:36 -0600',1,19),'+00:00',SUBSTR('2011-10-04 12:58:36 -0600',20));