Time switch mechanism adapted to actuate a switch either automatically by a clock mechanism at a predetermined time or manually at a desired time. The time switch mechanism has a timer cam actuated by the clock mechanism, a timer lever coupled with the timer cam so as to be actuated by the actuation of the timer cam, a switch lever coupled with the timer lever so as to be actuated by the actuation of the timer lever so that the switch is actuated by the actuation of the switch lever thereby permitting the switch to be actuated automatically by the clock mechanism through the timer cam, timer lever and the switch lever. A manually operable switching cam is provided which is engageable with the timer lever and the switch lever.