A timepiece includes a clock circuit, a signal receiver configured to receive signals including time information, a processor configured to control a changing operation of changing a current time measured by the clock circuit based on the time information obtained from the signal receiver and controls a presenting operation of whether or not the changing operation is successful. The processor controls the changing operation based on a first flag indicating whether or not the signal receiver successfully receives the time information. The processor controls the presenting operation based on a second flag indicating whether or not the changing operation is successful within a predetermined period of time.