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.

Word History and Origins

Origin of perpetual calendar¹

First recorded in 1890–95

Example Sentences

You’ll find his graphic perpetual calendars, snugly fitted wood animal puzzles and aluminum chairs with half-moon backs and skinny, insectlike legs.

From New York Times

The 1518 series was the first by any watch manufacturer to combine perpetual calendar and chronograph.

From Reuters

Baselworld, for those who don’t know a tourbillon from a perpetual calendar, is the watch industry’s equivalent of the Olympics — eight days of fierce competition mixed with globally themed pageantry.

From New York Times

But at the Basel fair, he displayed a traditional mechanical timepiece — a “perpetual calendar” with bold dials and a meter showing how much energy the spring has left in it.

From New York Times

One side of the impressive 43.3mm watch — in addition to the timekeeping dial and the power reserve indicator — also displays one of the most sought-after complications today: the perpetual calendar.

From Forbes