calendar

1. A system of timekeeping that defines the beginning and length and divisions of the year (synset 115198526)
   is a type of: arrangement, organisation, organization, system - an organized structure for arranging or classifying
   subtypes:

   • lunar calendar - a calendar based on lunar cycles
   • lunisolar calendar - a calendar based on both lunar and solar cycles
   • solar calendar - a calendar based on solar cycles
   has: embolism, intercalation - an insertion into a calendar
2. A list or register of events (appointments or social events or court cases etc) (synset 106499232)
   "I have you on my calendar for next Monday"
   is a type of: list, listing - a database containing an ordered array of items (names or topics)
   subtypes: docket - (law) the calendar of a court; the list of cases to be tried or a summary of the court's activities
3. A tabular array of the days (usually for one year) (synset 108283770)
   is a type of: table, tabular array - a set of data arranged in rows and columns
   subtypes: perpetual calendar - a chart or mechanical device that indicates the days of the week corresponding to any given date over a long period of years

1. Enter into a calendar (synset 200680900)
   is a type of: schedule - plan for an activity or event

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