Abstract: A method for updating (500) the date for a watch implemented by an updating device (100). The updating method (500) including storing in memory the current date (171) according to a perpetual calendar programmed on a time zone (175), receiving a second signal (181) before verifying a first signal (131) after having received the second signal (181). A comparison is carried out between the second signal (181) and the current date (171) in order to control the driving of at least one date-disc (120) with a drive member (160) if the second portion (127) is different from the current date (171) until the first sensor (130) detects a first portion (126) of the at least one date-disc (120).