Electronic timepiece with calendar function and control method for this timepiece

摘要

An electronic timepiece with a calendar display function that drives a piezo-electric actuator (71) to drive a rotation of a piezo-electric rotor (72), and stops the drive of the piezo-electric actuator when the amount of the piezo-electric rotor advances is detected by a spring switch. Photoreflectors are used for day detection accomplished using gears having a small speed reduction ratio relative to the piezo-electric rotor, and spring switches are used in month detection and year detection.