Timepiece with global times, comprising: • a time display comprising an hours wheel, an hours hand kinematically connected to the hours wheel and a minutes hand; • a mechanism for displaying global times and time zones which is arranged to allow setting when changing time zone, this mechanism comprising a rotating city disc, a twenty-four hour disc kinematically connected to the hours wheel in order to be caused to rotate, one full rotation every twenty-four hours, and an actuating mechanism arranged to be manually actuated by the user and to cause, each time it is actuated, the rotation of the city disc and the twenty-four hour disc by one 24 th of a full rotation in a first direction and to pivot the hours hand of the time display by one hour in a second direction opposite to the first direction, • a mechanism for displaying the date comprising a date indicator (6, 7) driven by a date going train (8, 9) kinematically connected to the hours wheel for driving same, and • a mechanism for synchronising the date arranged to synchronise the date to the time zone when changing time zone and kinematically connected to the mechanism for displaying the date and to the city disc, characterised in that the mechanism for synchronising the date is arranged: • to move the date indicator (6, 7) and to cause the date to fall back by one day when actuation of the actuation mechanism causes the passage from the time zone of Auckland to that of Midway and thus passage through the International Date Line, said actuation occurring between midnight and 23:00, Auckland time; • not to move the date indicator (6, 7) and to leave the date unchanged when actuation of the actuation mechanism causes the passage from the time zone of Auckland to that of Midway and thus passage through the International Date Line, said actuation occurring between 23:00 and midnight, Auckland time; such that the mechanism for synchronising the date allows the date to be automatically adjusted upon each change in time zone and in particular when such a change in time zone causes a change in date. • a time display comprising an hours wheel, an hours hand kinematically connected to the hours wheel and a minutes hand; • a mechanism for displaying global times and time zones which is arranged to allow setting when changing time zone, this mechanism comprising a rotating city disc, a twenty-four hour disc kinematically connected to the hours wheel in order to be caused to rotate, one full rotation every twenty-four hours, and an actuating mechanism arranged to be manually actuated by the user and to cause, each time it is actuated, the rotation of the city disc and the twenty-four hour disc by one 24 th of a full rotation in a first direction and to pivot the hours hand of the time display by one hour in a second direction opposite to the first direction, • a mechanism for displaying the date comprising a date indicator (6, 7) driven by a date going train (8, 9) kinematically connected to the hours wheel for driving same, and • a mechanism for synchronising the date arranged to synchronise the date to the time zone when changing time zone and kinematically connected to the mechanism for displaying the date and to the city disc, • to move the date indicator (6, 7) and to cause the date to fall back by one day when actuation of the actuation mechanism causes the passage from the time zone of Auckland to that of Midway and thus passage through the International Date Line, said actuation occurring between midnight and 23:00, Auckland time; • not to move the date indicator (6, 7) and to leave the date unchanged when actuation of the actuation mechanism causes the passage from the time zone of Auckland to that of Midway and thus passage through the International Date Line, said actuation occurring between 23:00 and midnight, Auckland time;