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he date of Easter Sunday is commonly defined as the first Sunday that falls after the full moon, sometimes called the Easter or Paschal Full Moon, that occurs after the spring equinox. As the precise computation of the moments of the spring equinox and the astronomical full moon is complex and laborious the determination of Easter Sunday has always been based on a simplified method.

The date of the spring equinox is hereby fixed as 21 March and the ‘ecclesiastical’ full moon dates are obtained from a table based on the mean motions of the sun and the moon. The Easter Full Moon is the tabular full moon that occurs on or after 21 March and the first Sunday that occurs afterwards is Easter Sunday. The earliest possible date for Easter Sunday is thus 22 March, which can only occur when the Easter Full Moon falls on Saturday 21 March.

As the astronomical spring equinox can actually occur on 19, 20 or 21 March and the astronomical full moon can also fall a day earlier or later than its mean tabular date it sometimes happens that the Easter date, as computed from the true motions of the sun and the moon, differs from the date as determined from the ecclesiastical rules.

Astronomical and Gregorian Easter dates who are different.

1590-2000

Legend: * Year (Astronomical Easter-Gregorian Easter)

  1. 1590 (March 25-April 22)
  2. 1598 (March 29-March 22)
  3. 1609 (April 26-April 19)
  4. 1622 (April 3-March 27)
  5. 1629 (April 8-April 15)
  6. 1666 (March 21-April 25)
  7. 1685 (March 25-April 22)
  8. 1693 (March 29-March 22)
  9. 1700 (April 4-April 11)
  10. 1724 (April 9-April 16)
  11. 1744 (March 29-April 5)
  12. 1778 (April 12-April 19)
  13. 1798 (April 1-April 8)
  14. 1802 (April 25-April 18)
  15. 1818 (March 29-March 22)
  16. 1825 (April 10-April 3)
  17. 1829 (April 26-April 19)
  18. 1845 (March 30-March 23)
  19. 1876 (April 9-April 16)
  20. 1900 (April 22-April 15)
  21. 1903 (April 19-April 12)
  22. 1923 (April 8-April 1)
  23. 1924 (March 23-April 20)
  24. 1927 (April 24-April 17)
  25. 1943 (March 28-April 25)
  26. 1954 (April 25-April 18)
  27. 1962 (March 25-April 22)
  28. 1967 (April 2-March 26)
  29. 1974 (April 7-April 14)
  30. 1981 (April 26-April 19)

2001-2500

  1. 2019 (March 24-April 21)
  2. 2038 (March 28-April 25)
  3. 2045 (April 2-April 9)
  4. 2069 (April 7-April 14)

2501-3000

3001-3500

  1. 3002 (March 28-April 25) (uncertain)
  2. 3013 (April 25-April 18)
  3. 3029 (March 29-March 22)
  4. 3040 (April 26/March 22-April 19) (uncertain)
  5. 3043 (April 23-April 16)
  6. 3060 (April 15-April 8)
  7. 3063 (April 12-April 5)
  8. 3083 (April 1-March 25)
  9. 3084 (April 20-April 13)

Sources

With the years from 1590 to 2500

Catalog with moon phases from -1999 to 4000, i got the astronomical Easter Full Moons from here.

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