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What determines the different date for Easter, each year?

April 26, 2017culture different easter holidays Society year

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What determines the different date for Easter, each year?

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The ecclesiastical rules are: * Easter falls on the first Sunday following the first ecclesiastical full moon that occurs on or after the day of the vernal equinox; * this particular ecclesiastical full moon is the 14th day of a tabular lunation (new moon); and * the vernal equinox is fixed as March 21. resulting in that Easter can never occur before March 22 or later than April 25. The Gregorian dates for the ecclesiastical full moon come from the Gregorian tables. Therefore, the civil date of Easter depends upon which tables – Gregorian or pre-Gregorian – are used. The western (Roman Catholic and Protestant) Christian churches use the Gregorian tables; many eastern (Orthodox) Christian churches use the older tables based on the Julian Calendar.