Holidays related to Easter: Difference between revisions
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From the year 325 CE on, [[wp:Easter Sunday|Easter Sunday]] has been defined as the first Sunday ''after'' the first full moon ''on or after'' the day of the March equinox. However, the actual astronomical values for the moments of the full moon and equinox are not used. Instead, approximations are used, the first one being that the equinox is assumed to fall on March 21st every year. The tracking of the moon phases is similarly done with relatively straightforward arithmetic (compared to the sort required for astronomical accuracy) which amounts to maintaining a parallel lunisolar calendar to our standard purely-solar one.
When
You may find algorithms on the [[wp:Computus|Computus]] page. Some of the results:
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