PURPOSE: To improve the time judgement accuracy and to enable to confirm the time correction frequency by means of integrating and indicating the time period after the time correction is received.

CONSTITUTION: A reference signal from a crystal oscillator circuit 12 is divided 13 and supplied to a display device 23 to display the time. The time signal from a receiver circuit 29 is detected in a correction signal generating circuit 30 and a time correction signal as an output of the circuit 30 and resets a second counter 14 and a shift register 27. The minute pulse inputted to a minute counter 20 is counted five times in a counter 24 and the pulses are sent as shift pulses to the register 27. Accordingly, every five days after the time correction is performed manually or with the time signal, outputs are obtained at output lines 27aW27f of the register 27, in sequence, putting on lights on display elements 25aW25f successively, thereby the integration indicator 25 is moved right word in turn every five days.