Patent ID: 7372779

Claim:
A radio controlled timepiece, which comprises: a reference signal generating means that outputs a reference signal; a time keeping means that outputs time keeping information based upon said reference signal; a display means that displays time information based upon said time keeping information; and a receiving means that receives a standard radio wave having time information, whereby output time information output from said time keeping means can be corrected based upon a reception signal output from said receiving means, and wherein said radio controlled timepiece further comprises: an offset time difference information storage means that stores an offset time difference formed between a certain region and a particular region where said standard radio wave has been received, by setting a time information in said certain region as a standard time information; a daylight saving time information storage means that stores therein information whether or not a daylight saving time is executed in the region where said standard radio wave has been received; a local standard time information forming means that executes an operational processing by utilizing said offset time difference information formed between said time information of said standard radio wave as received in said particular region and said standard time information, and said daylight saving time information used in said particular region, so as to form said local standard time information in said particular region; and a time difference correction history information storage means that stores information on whether or not a user has manually corrected time difference information, and wherein said radio controlled timepiece is configured so that when said radio controlled timepiece has received said standard radio wave, said offset time difference of said offset time difference information storing means is adjusted by utilizing said information of said time difference correction history information storage means, said daylight saving time information stored in said daylight saving time information storage means as obtained when said standard radio wave has been received at an immediately preceding sampling period, and said daylight saving time information as obtained when said standard radio wave has been received at the present sampling period, and then said local standard time information of said local standard time information forming means is adjusted based upon said adjusted offset time information and said daylight saving time information as obtained when said standard radio wave has been received at the present sampling period.