::Intercalation (timekeeping)


Calendar::month    Years::solar    Every::number    Lunar::second    Egyptian::julian    Coptic::usually

Intercalation is the insertion of a leap day, week, or month into some calendar years to make the calendar follow the seasons or moon phases. Lunisolar calendars may require intercalations of both days and months.

Intercalation (timekeeping) sections
Intro   Solar calendars    Lunisolar calendars    Islamic calendars    Leap seconds    Other uses   See also  References  

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