Schedule management method, program for causing a computer to carry out the process in such method, and personal digital assistant

摘要

The present invention relates to a schedule management method for managing schedule information by a server via a cellular telephone network, wherein the method comprising the steps of extracting the schedule information of a receiver depending on a reception state; generating communication availability information of the receiver based on the schedule information extracted in the extraction step; and notifying a sender of the communication availability information sender via the cellular telephone network. With the present invention, the sender and the receiver are notified of the time when they can communicate with each other.