Calendars meaning : Any system by which time is divided into days, weeks, months, and years. A means to determine the date consisting of a document containing dates and other temporal information. A list of planned events. An orderly list or enumeration of persons, things, or events; a schedule. An appointment book (US), appointment diary (UK) To set a date for a proceeding in court, usually done by a judge at a calendar call. To enter or write in a calendar; to register.