
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.
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.Astronomy Calculator Disclaimer:
These calculators are for informational and educational purposes only. Accuracy is not guaranteed and should not be used for critical calculations or navigation. Clear Sky Tonight is not responsible for any errors, omissions or misrepresentations.
These calculators are for informational and educational purposes only. Accuracy is not guaranteed and should not be used for critical calculations or navigation. Clear Sky Tonight is not responsible for any errors, omissions or misrepresentations.