A delay timer for the delayed flushing of a toilet includes a timer mechanism, an external switch, and a retracting device. The external switch is in communication with the timer mechanism. The retracting device has a retractable line and is in communication with the timer mechanism. The retractable line is configured to be connected to a chain or a flapper in a tank of the toilet for flushing the toilet. Wherein, when the external switch is activated, the timer mechanism is configured to delay a set period of time and then communicate with the retracting device to retract the retractable line to flush the toilet after the set period of time from when the external switch was activated.