This relates to a calendar display mechanism for a clockwork movement, including a day-of-the-month wheel intended to actuate a month wheel at the end of each month, the month wheel including a year cam that has n series of graduations, each of which is associated with a particular year, each series of graduations having a number m of graduations corresponding to the number of months in the associated year, the display mechanism including a rotatable month lever which supports a month feeler-spindle thereon which remains in contact with the year cam so as to define the angular orientation of the month lever, the lever also having a kinematic connection to a month display wheel so as to cause the wheel to perform a retrograde movement.

In an annual or perpetual calendar mechanism, a day-of-the-month wheel includes a notch. At each actuation of a lever, a first pawl finger effects an actuation of one step, on one of the teeth of the day-of-the-month wheel. Upon actuation of the lever at the end of a month of fewer than 31 days, a second pawl finger effects, in the notch, an actuation of the day-of-the-month wheel by a whole number of steps. The notch is positioned between two consecutive teeth among the teeth of the day-of-the-month wheel. The day-of-the-month wheel has a peripheral edge which forms the profiles of its teeth as well as the notch.

In an annual or perpetual calendar mechanism, a lever bears a maneuvering device of a day-of-the-month wheel. A month wheel defines course beginning stops, each associated with a month and operational for controlling a course beginning position of the lever when the month wheel is in the angular position associated with this month. These course beginning stops are bottoms of slots alternating with the teeth of the month wheel. The month wheel has a peripheral edge which forms the profile of its teeth as well as the course beginning stops.

An electronic timepiece includes a second hand, a dial having a display area provided with a plurality of markings corresponding to the second hand, and a display controller that controls driving operation of the second hand to cause the second hand to display calendar information. The display area, when viewed from a timepiece front side, is divided by two straight lines that pass through a rotating shaft of the second hand and are perpendicular to each other into four divided areas. Each of the divided areas is related to years elapsed since a leap year, and each of the markings is related to the month. The display controller, when causing the second hand to display the calendar information, causes the second hand to point at one of the markings in one of the four divided areas to display the elapsed years and the month.

A horological movement including a driving wheel set kinematically linked to a first and to a second display mechanism respectively intended to drive a first and a second display of a time value, a mechanism for adjusting the position of these displays including a sliding-gear assembly and a control member adapted to assume an adjusting position in which it is engaged with the sliding-gear assembly and in which when urged in a first direction of rotation, it drives the sliding-gear assembly into a first correction position in which the sliding-gear assembly is able to cooperate with the first display mechanism so as to modify the position of the first display, and when urged in a second direction of rotation, it drives the sliding-gear assembly into a second correction position in which the sliding-gear assembly is able to cooperate with the second display mechanism so as to modify the position of the second display.

A watch movement including a date mechanism including a drive mobile with 31 stable positions actuated in steps of one step per day by a time train; a mechanism for displaying the periods of an annual cycle driven in jumps by the drive mobile, the mechanism for displaying the periods of an annual cycle including a member for indicating the periods of an annual cycle and an annual cycle train moved directly by the drive mobile and configured to rotate the member for indicating annual cycle periods; the annual cycle train including an annual cycle drive wheel kinematically coupled in rotation with an annual cycle correction wheel, the annual cycle correction wheel being meshed with the member for indicating annual cycle periods; an annual cycle correction mechanism configured to correct the mechanism for displaying the periods of an annual cycle by rotating a winding stem rotating the annual cycle correction wheel and changing the indexing between the annual cycle drive wheel and the annual cycle correction wheel.

The invention relates to an Islamic Hijiri calendar for a mechanical clockwork movement comprising a 30-position date indicator arranged to be driven by a date-driving mechanism and to engage with a large rocker (7). A month control mechanism is arranged to differentiate between the months with 29 days and those with 30 days. A year control mechanism is arranged to differentiate between an abundant year and a common year. During a common year, a large rocker (7) is arranged to engage with a date star (9), to move two teeth of the date star (9) in order to move from the 29th of a month to the 1st of the following month, the large rocker (7) resting on the month cam (4).