Patent ID: 8705321

Claim:
An electronic timepiece comprising: a GPS device that receives satellite signals transmitted from positioning information satellites and acquires time information and orbit information and determines current position; a time zone information storage unit that stores region data dividing geographical information containing time difference information into a plurality of regions, and time difference information contained in each region; a time difference information acquisition unit that extracts the region containing the current position determined by the GPS device from the region data, and acquires the time difference information contained in that region; and a time calculation unit that calculates a current time based on the time difference information acquired by the time difference information acquisition unit and the time information acquired by the GPS device; the region data stored in the time zone information storage unit including first region data dividing the geographical information into a plurality of first regions, and second region data further dividing each first region that contains a plurality of time difference values into a plurality of second regions; the first region data including time difference data for first regions that contain only one time zone and including a link to the second region data for first regions that contain a plurality of time zones; the time difference information acquisition unit extracting a first region containing the current position from the first region data and, if there is time difference data associated with the extracted first region, acquiring the time difference information for the extracted first region from the first region data, and if there is a link to the second region data associated with the extracted first region, acquiring the time difference information for the extracted first region from the second region data based on the link.