calendar
n. countablen. a system or a chart that shows the days, weeks, and months of a year. You use it to keep track of dates and plan your schedule.
n. a system of organising time into days, weeks, and months for social, religious, commercial, or administrative purposes. Also refers to a physical or digital record of such a system used for scheduling.
I marked your birthday on my calendar.
The legal team reviewed the court calendar to ensure they had enough time to prepare for the upcoming trial.
While the Gregorian calendar is the international standard for civil use, many cultures continue to observe traditional lunar calendars to determine the precise dates of religious festivals and seasonal celebrations.
Etymology tree Old French calendierbor. Middle English kalender English calendar From Middle English kalender, from Old French calendier, from Latin calendarium (“account book”), from kalendae (“the first day of the month”), from kalō (“to announce solemnly, to call out (the sighting of the new moon)”), from Proto-Indo-European *kelh₁-. Doublet of calendarium. Displaced native Old English rīmbōc and ġerīmbōc.
Commonly used with the prepositions 'on' (on the calendar) or 'in' (in the calendar).