perpetual calendar

American  

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.

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Etymology

Origin of perpetual calendar

First recorded in 1890–95

Example Sentences

Launched in 1941, it was the world's first serially produced perpetual calendar chronograph.

From Barron's • Nov. 9, 2025

Technically, this Rubik’s Cube perpetual calendar is a calendar from 1982, not a calendar of 1982, but it still could come in handy in certain situations.

From Slate • Sep. 23, 2018

The difference between quartz and old-fashioned mechanical is that your child’s Winnie the Pooh watch will likely keep better time than a seventy-six-thousand-dollar Vacheron Constantin perpetual calendar in rose gold.

From The New Yorker • Mar. 13, 2017

Truth to tell, the Top Gun Big Pilot perpetual calendar watch is no thing of great beauty.

From New York Times • Oct. 8, 2014

Hence, for the construction of a perpetual calendar, there must be thirty different sets or lines of epacts.

From Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary" by Various