| 摘要 |
PROBLEM TO BE SOLVED: To provide a perpetual calendar with which day figures are simultaneously displayed in the day figure array of each month of a general calendar beginning from Sunday by rotationally moving a date display in the state of fixing a day-of-the week display. SOLUTION: A planar cover member 1 is provided with a date display window 2 for days for one month or more and the day figures are displayed in the positions divided by seven in the circumferential direction. Plural date display disks 4 having gears 12 in the outer peripheral parts are so arranged that the respective day figures appear in the respective date display windows 2. The gears 12 of the respective date display disks 4 are intermeshed with each other and are cooperatively rotated, by which the day figures are simultaneously changed in the day-of-the week array of the general calendar beginning from Sunday in the respective date display windows 2. The disks are partly projected from the cover member 1 to the outside in order to cooperatively rotate the respective date display disks 4. The cover member 1 is partly provided with a month display window 3 and month display disks 8 displaying month characters are so arranged as to appear in the month display window 3.
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