perpetual-calendar

perpetual calendar

noun
1.
a calendar devised to be used for many years, as in determining the day of the week on which a given date falls.
2.
a desk calendar with months, days, and dates that can be changed, as by adjusting various dials, so that it may be used over and over for many years.

Origin:
1890–95

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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WordNet
perpetual calendar

noun
a chart or mechanical device that indicates the days of the week corresponding to any given date over a long period of years 
WordNet® 3.0, © 2006 by Princeton University.
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