A method of forwarding calls directed to a cellular phone to a target phone number based on time-based trigger events. A call forward profile associated with the cellular phone is defined, wherein the profile has associated therewith a window of time for forwarding calls and the target phone number. The call forward profile is stored in memory in the cellular phone and the cellular phone periodically determines when it is within the window of time of a call forward profile. If so, the cellular phone notifies the cellular provider associated with cellular phone to forward later-received calls to the target number using the cellular provider's own activation and deactivation codes. Notification by the cellular phone to the cellular provider may be set to automatic or only after a prompt to the cellular phone user.