A radio-controlled wristwatch , comprising: a reception unit for receiving a radio wave from a satellite to extract time-of-week specifying information and week specifying information; a clock for counting a current date and time; a date and time adjustment unit for adjusting the current date and time counted by the clock; a week information holding unit for holding the week specifying information; a week information updating unit for updating the week specifying information held in the week information holding unit at the timing at which the current date and time counted by the clock passes 0:00 AM every Sunday; and a week information reception limiting unit for limiting the reception of the week specifying information performed by the reception unit , and controlling the reception unit to receive the week specifying information in a predetermined case, wherein the week information reception limiting unit is configured to control the reception unit to receive the week specifying information in at least one of the cases b) and c), wherein in case b) a date and time converted from the time-of-week specifying information received by the reception unit or a date and time counted by the clock falls within a predetermined range with respect to a time point at which the week specifying information is updated; and in case c) a smaller one of differences in a forward direction and in a reverse direction between the date and time converted from the time-of-week specifying information received by the reception unit and the date and time counted by the clock extends over the time point at which the week specifying information is updated. a reception unit for receiving a radio wave from a satellite to extract time-of-week specifying information and week specifying information; a clock for counting a current date and time; a date and time adjustment unit for adjusting the current date and time counted by the clock; a week information holding unit for holding the week specifying information; a week information updating unit for updating the week specifying information held in the week information holding unit at the timing at which the current date and time counted by the clock passes 0:00 AM every Sunday; and a week information reception limiting unit for limiting the reception of the week specifying information performed by the reception unit , and controlling the reception unit to receive the week specifying information in a predetermined case, wherein the week information reception limiting unit is configured to control the reception unit to receive the week specifying information in at least one of the cases b) and c), wherein in case b) a date and time converted from the time-of-week specifying information received by the reception unit or a date and time counted by the clock falls within a predetermined range with respect to a time point at which the week specifying information is updated; and in case c) a smaller one of differences in a forward direction and in a reverse direction between the date and time converted from the time-of-week specifying information received by the reception unit and the date and time counted by the clock extends over the time point at which the week specifying information is updated. <EOS>