Easter dating method

How to calculate the Easter date for a given year using Gauss’ Algorithm

Easter is the most important movable feast in Christianity. How is the date determined each year? Easter falls on the first Sunday after the Full Moon date , based on mathematical calculations, that falls on or after March Although Easter is liturgically related to the beginning of spring in the Northern Hemisphere March equinox and the Full Moon , its date is not based on the actual astronomical date of either event. Both dates may coincide with the dates of the astronomical events, but in some years, they don't. Why is Orthodox Easter so late? In years in which the Church's March equinox and Paschal Full Moon dates do not coincide with the astronomical dates of these events, there may be some confusion about the date of Easter. In , for example, the March equinox in the Western Hemisphere happened on Wednesday, March 20 , while the first Full Moon in spring was on Thursday, March 21 in many time zones. If the Church followed the timing of these astronomical events, Easter would have been celebrated on March 24, the Sunday after the Full Moon on March

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The World Council of Churches proposed a reform of the method of determining the date of Easter [1] at a summit in Aleppo , Syria , in March Under the proposal, Easter would be defined as the first Sunday following the first astronomical full moon following the astronomical vernal equinox , as determined from the meridian of Jerusalem. The reform would have been implemented starting in , the first year in which the eastern and western dates of Easter would coincide after this method was proposed in

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The computus is used to set the time for ecclesiastical purposes, in particular to calculate the date of Easter. The current definition of the date of Easter is that defined in at the Council of Nicaea. The fourteenth day of the Moon being the day of the full moon and March 21 being the date of the spring equinox, this definition is often translated as follows: Easter is the first Sunday following the first full Moon of Spring. This second definition is misleading because it suggests that the date of Easter is the result of an astronomical calculations based on the determination of the Spring equinox and of the first full moon after the equinox.

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Why does Easter change every year? Here's how the date has been historically determined.

Given an integer Y , denoting a year, as input, the task is to find the date of Easter for that year. Hence, Easter date will be Approach: Gauss Easter Algorithm is used to easily calculate the date of Easter for a year. This algorithm was first thought of by Carl Friedrich Gauss.

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