The utility model provides a full-automatic perpetual calendar, comprising a circuit board; wherein, a clock device, a week device and a date device are connected with the circuit board respectively; the week device includes a week rotary table, a first micro-switch and a week driving device; the week driving device is connected with the week rotary table and the micro-switch respectively; the week rotary table that is driven by the clock device is rotated once every 12 hours, displaying the morning or the afternoon of day; a month device is connected with the date device by a linkage structure, and is driven by the date device to turn over the loose leaves of the months. The full-automatic perpetual calendar has the advantages that: the rotary table is adopted for the display of the days and arranged in a time indicator dial, and the week rotary table is controlled by time by adopting the micro-switch; the date displaying device and the month displaying device are arranged on a same axis; the display of the dates controls the display of the months by the linkage structure, therefore, the unnecessary circuit boards are saved; the full-automatic perpetual calendar is the one with low cost and low losses.