Abstract: The present time of day warning system provides the subscriber with the ability to designate at least one time interval during the course of the day when the subscriber prefers not to receive calls on their mobile phone unless these incoming calls are of an urgent nature. In this system, if the subscriber has enrolled in the Time Of Day Warning Service and their mobile phone is turned on, when someone attempts to call the subscriber, the mobile phone system determines the present time of day at the subscriber's present location. If the incoming call is attempted during one of the subscriber-designated blackout time intervals, the incoming call is intercepted. The calling party receives a recorded message which indicates the present time at the subscriber's present location and an indication that the subscriber is not taking calls at this time.