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(Encyclopedia)calendar [Lat., from Kalends], system of reckoning time for the practical purpose of recording past events and calculating dates for future plans. The calendar is based on noting ordinary and easily o...

French Revolutionary calendar

(Encyclopedia)French Revolutionary calendar, the official calendar of France, Nov. 24, 1793–Dec. 31, 1805. Its introduction was decreed by the Convention on Oct. 5, 1793, but it was computed from Sept. 22, 1792, ...

Julian Day calendar

(Encyclopedia)Julian Day calendar, system of astronomical dating that allows the difference between two dates to be calculated more easily than conventional civil calendars with their uneven months. It was devised ...


(Encyclopedia)Ides: see calendar.


(Encyclopedia)Kalends: see calendar.


(Encyclopedia)Nones: see calendar.

leap year

(Encyclopedia)leap year: see calendar.


(Encyclopedia)Sivan sēvänˈ [key], in the Jewish calendar, the third month (or ninth month, depending upon the system of reckoning). Esther 8.9; Baruch 1.8. ...

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