Abstract: An electronic ON/OFF timer apparatus and method having predetermined time delay intervals. The apparatus is intercoupled between an electrical power source and an electrically powered external device such as a lamp, television, radio, etc. The apparatus generally comprises an electromechanical timer having an ON switch and an OFF switch for enabling approximate ON and OFF times to be selected, a memory for storing a predetermined plurality of randomly varying time delay intervals, and a countdown timer. An operator first selects the approximate ON and OFF times via the switches on the timer. When the approximate ON or OFF time is reached, the countdown timer is loaded from the memory with a first one of the predetermined plurality of randomly varying time delay intervals. The countdown timer then counts down a time period corresponding to the first delay time interval.