In the gregorian calendar the Easter date is at its earliest on March, 22^{nd} and at its latest on April, 25^{th}.

Because the formula of Gauss has exceptions and has limited validity, I used the Spencer Jones method as described in the book Astronomical Algorithms-second edition by Jean Meeus.

The Spencer Jones method is valid starting from 1583.

divide |
by |
quotient |
remainder |

the year x | 19 | / | a |

the year x | 100 | b | c |

b | 4 | d | e |

b + 8 | 25 | f | / |

b - f + 1 | 3 | g | / |

19a + b - d - g + 15 | 30 | / | h |

c | 4 | i | k |

32 + 2e + 2i - h - k | 7 | / | l |

a + 11h + 22l | 451 | m | / |

h + l - 7m + 114 | 31 | n | p |

Result n indicates the number of the month so n=3 means March and n=4 is April.

p+1 is the day on which it is Easter Sunday.

When applied for the year 2023

2023/19 --> a = 9

2023/100 --> b = 20, c = 23

20/4 --> d = 5, e= 0

(20+8)/25 --> f = 1

(20-1+1)/3 --> g = 6

(19*9+20-5-6+15)/30 --> h = 15

23/4 --> i = 5, k = 3

(32+2*0+2*5-15-3)/7 --> l = 3

(9+11*15+22*3)/451 --> m = 0

(15+3-7*0+114)/31 --> n = 4 (April), p = 8 (Easter Sunday = p+1 = 9)

**Easter Sunday 2023 is on 9/4**

Extreme data for Easter are 22/3 as in 1818 and 2285 and 25/4 as in 1886, 1943 en 2038.

The most frequent Easter date is April, 19^{th}.

**Follow this link to find the Easter dates for 1000 years from 1583 to 2582.**