Patent ID: 11880170
Assignee: ETA SA MANUFACTURE HORLOGèRE SUISSE
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 9:
10. An annual or perpetual calendar setting method for a watch, the watch comprising an hour hand, a minute hand, a setting member, a detecting member, and processing circuitry configured to implement the annual or perpetual calendar setting method, the annual or perpetual calendar setting method comprising:
setting a current date by positioning at least one of the hour hand and the minute hand using the setting member;
causing, by the processing circuitry, rotation of the minute hand by an amount of rotation that causes a date change to occur;
determining, by the processing circuitry, the set current date based on the amount of rotation that caused the date change to occur; and
storing the set current date in a memory,
wherein the causing step comprises detecting, as the amount of rotation, a number of revolutions of the minute hand until the date change occurs.