1. A subscriber device within a point-to-multipoint communication system, comprising:physical layer circuitry configured to:
receive a first time, the first time being collectively shared by a plurality of subscriber devices within the point-to-multipoint communication system irrespective of their geographic locations; and
transmit a subscriber-device identifier to a service provider system and, in response, receive a time offset corresponding to a geographic location of the subscriber device, wherein the service provider system retrieves the geographic location from a database using the subscriber-device identifier and calculates the time offset based on the geographic location; and
processor circuitry configured to:
determine a second time based on the first time and the time offset, the second time being unique to subscriber devices within the geographic location from among the plurality of subscriber devices;
receive the service from the service provider system at a scheduled time based on the second time; and
display a list of available services in an electronic program guide based on the second time.