Definition of perpetual calendar in US English:

perpetual calendar


  • 1A calendar that can be adjusted to show any combination of day, month, and year, and is therefore usable year after year.

    • ‘The watches in the perpetual calendar series indicate days and months correctly for 100 years.’
    • ‘This kind of calendar is called a perpetual calendar.’
    • ‘The second face gives the date in the form of a perpetual calendar, with automatic adjustments for leap years.’
    • ‘I could download animated clocks, perpetual calendars, a gizmo that made my keyboard clack and ding like an old Smith Corona typewriter.’
    • ‘Once he repaired one that had more than 400: ‘It was a special edition with a perpetual calendar calculating even the leap years.’’
    • ‘They said non-quartz, mechanical watches with features such as the minute repeater and perpetual calendar are especially in demand.’
    1. 1.1 A set of tables from which the day of the week can be reckoned for any date.