The World Almanac Features a "Perpetual Calendar", a Collection of 14

question 27

Essay

The World Almanac features a "perpetual calendar", a collection of 14 possible calendars. Why does this suffice to be sure there is a calendar for every conceivable year

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Definitions:

Anther

The part of a flower's stamen that contains pollen, which is necessary for fertilization in plants.

Nonreproductive

Pertaining to functions or behaviors not directly involved in the process of reproduction.

Sepal

One of the outermost parts of a flower, usually green and leaf-like, that protects the developing flower.