perpetual calendar
Never-ending date system
A perpetual calendar is a calendar designed to remain valid across many years, typically by separating the day-of-week grid from the month and year.
Some perpetual calendars are reference tables for determining what day any date falls on.
The term also applies to digital calendars that update automatically: My phone's perpetual calendar already shows holidays for next year.
- mechanical movementGear-based timekeeping mechanism
- leap yearCalendar with added day
- leap dayFebruary's occasional extra
- analog clockTimepiece with rotating hands
- balance wheelTimekeeping oscillator in watches
horology · escapement · wristwatch · epoch · pocket watch · date display · day of the week · complication · moon phases · mainspring · chronometer · sundial · time keeping · seasons · recurring · never ending · datebook · eternal
- calendardate, day, week, month, year
- watch partshands, hand, dial, hour hand, minute hand
- watchmakingloupe, chronograph, tweezers, screwdriver, power reserve
- timekeepingclock, watch, watches, clocks, timer
- watcheswristwatch, pocket watch, analog watch, digital watch, mechanical watch
- timepiecesclock, wristwatch, pocket watch, stopwatch, wall clock
perpetual calendaryearly planner
Book organizing twelve months
wall calendar · desk calendar · daily planner · monthly planner