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From Middle English kalender, from Old French calendier, from Latin kalendarium (account book), from kalendae (the first day of the month), from kalare (to announce solemnly, to call out (the sighting of the new moon)), from Proto-Indo-European *kelh₁-.



calendar (plural calendars)

  1. Any system by which time is divided into days, weeks, months, and years.
    The three principal calendars are the Gregorian, Jewish, and Islamic calendars.
  2. A means to determine the date consisting of a document containing dates and other temporal information.
    Write his birthday on the calendar hanging on the wall.
  3. A list of planned events.
    The club has a busy calendar this year.
  4. An orderly list or enumeration of persons, things, or events; a schedule.
    • 1908 [1597], Francis Bacon, “XV. Of Seditions and Troubles”, in Mary Augusta Scott, editor, The Essays of Francis Bacon[1]:
      Shepherds of people had need know the calendars of tempests of state; which are commonly greatest, when things grow to equality; as natural tempests are greatest about the Equinoctia.
    • 1963, Margery Allingham, chapter 20, in The China Governess[2]:
      The story struck the depressingly familiar note with which true stories ring in the tried ears of experienced policemen. [] The second note, the high alarum, not so familiar and always important since it indicates the paramount sin in Man's private calendar, took most of them by surprise although they had been well prepared.
    a calendar of bills presented in a legislative assemblly;  a calendar of causes arranged for trial in court
  5. (US) An appointment book (US), appointment diary (UK)

Usage notes[edit]

  • Calendar should not be confused with calender.


Derived terms[edit]


  • Tok Pisin: kalenda
  • Japanese: カレンダー (karendā)
  • Korean: 카렌더 (karendeo)
  • Swahili: kalenda


The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Wiktionary:Entry layout § Translations.


calendar (third-person singular simple present calendars, present participle calendaring, simple past and past participle calendared)

  1. (law) To set a date for a proceeding in court, usually done by a judge at a calendar call.
    The judge agreed to calendar a hearing for pretrial motions for the week of May 15, but did not agree to calendar the trial itself on a specific date.
  2. To enter or write in a calendar; to register.
    (Can we find and add a quotation of Waterhouse to this entry?)


See also[edit]



Alternative forms[edit]


Borrowed (in this form) from Latin calendārium. Compare the inherited doublet cărindar.


calendar n (plural calendare)

  1. calendar
  2. almanac


Related terms[edit]