What is the Date of Easter

This calculator determines the Date of Easter. The date of Easter is a moveable holiday because it based on a based on a calculations determined by the full moon and the vernal equinox. Easter is always on Sunday, however.

According to The Explanatory Supplement to the Astronomical Almanac (1992), Easter is defined as: "In the Gregorian calendar, the data of Easter is defined to occur on the Sunday following the ecclesiastical full moon that falls on or next after March 21st."

Wikipedia has a more detailed explanation on the Date of Easter.

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Calculate the Date of Easter

Background on the Date of Easter

The astronomy calculator for the Date of Easter is based on a formula in a book titled Practical Astronomy with you Calculator or Spreadsheet by Peter Duffett-Smith and Jonathan Zwart.