A timepiece movement comprising: an hour wheel and pinion ; a minute wheel and pinion ; a winding stem ; a time difference correction train configured to rotate in conjunction with the winding stem; a calendar indicator ; and a calendar change mechanism configured to turn the calendar indicator ; the hour wheel and pinion including an hour wheel configured to rotate in conjunction with the minute wheel and pinion , an hour jumper , an hour jumper pinion that engages the hour jumper, and an hour wheel body to which an hour hand attaches, the hour wheel body configured to turn in conjunction with the hour wheel through the hour jumper and hour jumper pinion, and turn in conjunction with the time difference correction train ; and the calendar change mechanism including a calendar change wheel configured to turn in conjunction with the hour wheel body , a calendar change lever , a calendar change cam configured to contact the calendar change lever , flex the calendar change lever by rotating in conjunction with the calendar change wheel, and turn in response to spring force of the flexed calendar change lever, and a calendar change pawl configured to rotate in unison with the calendar change cam, and advance the calendar indicator when the calendar change cam turns in response to the spring force. an hour wheel and pinion ; a minute wheel and pinion ; a winding stem ; a time difference correction train configured to rotate in conjunction with the winding stem; a calendar indicator ; and a calendar change mechanism configured to turn the calendar indicator ; the hour wheel and pinion including an hour wheel configured to rotate in conjunction with the minute wheel and pinion , an hour jumper , an hour jumper pinion that engages the hour jumper, and an hour wheel body to which an hour hand attaches, the hour wheel body configured to turn in conjunction with the hour wheel through the hour jumper and hour jumper pinion, and turn in conjunction with the time difference correction train ; and an hour wheel configured to rotate in conjunction with the minute wheel and pinion , an hour jumper , an hour jumper pinion that engages the hour jumper, and an hour wheel body to which an hour hand attaches, the hour wheel body configured to turn in conjunction with the hour wheel through the hour jumper and hour jumper pinion, and turn in conjunction with the time difference correction train ; and the calendar change mechanism including a calendar change wheel configured to turn in conjunction with the hour wheel body , a calendar change lever , a calendar change cam configured to contact the calendar change lever , flex the calendar change lever by rotating in conjunction with the calendar change wheel, and turn in response to spring force of the flexed calendar change lever, and a calendar change pawl configured to rotate in unison with the calendar change cam, and advance the calendar indicator when the calendar change cam turns in response to the spring force. a calendar change wheel configured to turn in conjunction with the hour wheel body , a calendar change lever , a calendar change cam configured to contact the calendar change lever , flex the calendar change lever by rotating in conjunction with the calendar change wheel, and turn in response to spring force of the flexed calendar change lever, and a calendar change pawl configured to rotate in unison with the calendar change cam, and advance the calendar indicator when the calendar change cam turns in response to the spring force. <EOS>