Abstract: An automatic integrated circuit time delay switch for use as a switch in circuit with an external electrical device and an external electrical source. The switch operates on a programmed 24-hour time cycle that is defined by the initial application of power to the switch and a switch delay time that can either be preset at the factory or independently selected by the user. The application of power automatically sets the time delay switch in an initial state and starts the timing of the switch cycle. After a specified delay time, the switch automatically changes state and remains in this state until 24 hours after the initial application of power to the invention, at which time the switch is returned to its initial state. This sequence of events is repeated on a 24 hour cycle until power to the switch is cut off.