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DictionaryembolismCalendar insertion
noun

embolism

Insertion of an extra day or period into a calendar.

The calendar uses embolism to stay aligned with the seasons.

Etymology
embolismGreekinsertion

Greek embolismos meant an insertion. In a calendar, the inserted item is extra time added to bring the calendar into alignment with the cycle it is intended to follow.

More examples

  • Adding February 29 is an example of embolism.
  • Some lunisolar calendars use embolism to add an extra month.
  • The calendar's rules determine when embolism is necessary.

Forms

embolism · embolisms

Similar words

intercalation
The more usual technical term for inserting calendar days or months.
insertion
More general; does not specifically refer to calendar adjustments.