Abstract: In accordance with the present invention there is provided a method for serverless calendar sharing that allows free/busy time to be exchanged, viewed and new appointments scheduled between computing devices sharing a common calendar format without the use of a server and using a peer-to-peer network. An interval for the meeting/appointment is selected by an initiating device, and a request is sent out to participant devices in the peer-to-peer network for a set of free and busy time slots. A time slot for a meeting is considered free if it is correspondingly free in all participating responses, otherwise it is busy. The aggregate busy time is resolved using an efficient algorithm that is easily computed on low-compute-power devices such as handhelds.