High Quality Content by WIKIPEDIA articles! A perpetual calendar is a calendar which is good for a span of many years, such as the Runic calendar. For the Gregorian calendar, a perpetual calendar often consists of 14 one-year calendars, plus a table to show which one-year calendar is to be used for any given year. Note that such a perpetual calendar fails to indicate the dates of moveable feasts such as Easter. The 14 one-year calendars consists of two sets of seven calendars, seven for each common year (year that does not have a February 29) that starts on each day of the week, and seven for each leap year that starts on each day of the week, totaling fourteen.
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