Radio-controlled timepiece

A radio-controlled timepiece comprising:

• a timekeeping unit which keeps date and time;
• a date/time obtaining unit which obtains date/time information from outside to correct the date and time of the timekeeping unit;
• a preliminary notice information obtaining unit which obtains from outside preliminary notice information regarding whether leap second adjustment in which a leap second is inserted or deleted is executed;
• a date/time obtaining necessity setting unit which sets whether the date/time information needs to be obtained by the date/time obtaining unit based on history of obtaining the date/time information by the date/time obtaining unit;
• a reception success flag setting storage unit which stores setting of on or off of a reception success flag showing that the date/time information is obtained by the date/time obtaining unit within a predetermined amount of time;
• and
• a display unit which is able to display the date and time kept by the timekeeping unit and an accuracy identification mark according to setting of the date/time obtaining necessity setting unit,
• wherein the date/time obtaining necessity setting unit,
• (i) sets the reception success flag to off to show that the date/time information needs to be obtained at a timing of adjustment possible date/time which is determined to be date and time when the leap second adjustment can be executed, when the preliminary notice information is not obtained by the adjustment possible date/time or the preliminary notice information is obtained and it is confirmed that the leap second adjustment is executed at the adjustment possible date/time, and
• (ii) does not set the reception success flag to off at the adjustment possible date/time when the preliminary notice information is obtained and the leap second adjustment is not executed, and
• wherein the accuracy identification mark continuously displays a status of the reception success flag.