| 摘要 |
The present utility model discloses a perpetual calendar that can determine the day a given date from the Gregorian and Julian calendar. The perpetual calendar comprises a set of wheels attached to one another in a rotatable manner through each central axes. The set of wheels include three wheel members of varying diameters and printed with indicia that represents, either singly or in a combination, year, month, weeks, days and other parameters. The day of any given date can be determined by simple manipulation and rotational alignment of the different parameters. The present utility model unravels the full cycle of the Gregorian and Julian calendar (400 and 700 years respectively). |
