Monday Mar 18, 2024
Calculating Easter
In today's cast, I discuss calculating Easter in the Western World (Gregorian Calendar), the history, and the pattern. If you are feeling particularly "mathy" you can use this formulae...
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The Penrose formulae for Calculating Easter:
Calculate D="'225'" - 11(Y MOD 19).
If D is greater than 50 then subtract multiples of 30 until the resulting new value of D is
less than 51.
If D is greater than 48 subtract 1 from it.
Calculate E="'(Y" +' [Y/4] + D + 1) MOD 7. (NB Integer part of [Y/4])
Calculate Q="'D +'" 7 - E.
If Q is less than 32 then Easter is in March. If Q is greater than 31 then Q - 31 is its date in April.
For example, for 1998:
D = 225 - 11*(1998 MOD 19) = 225 - 11*3 = 192
D is greater than 50, therefore:
D = (192 - 5*30) = 42
E = (1998 + [1998/4] + 42 + 1) MOD 7="'2540'" MOD 7="'6'"
Q = 42 + 7 - 6="'43'"
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or this...
2024 | Easter | Sunday | Mar 31 |
2025 | Easter | Sunday | Apr 20 |
2026 | Easter | Sunday | Apr 5 |
2027 | Easter | Sunday | Mar 28 |
2028 | Easter | Sunday | Apr 16 |
2029 | Easter | Sunday | Apr 1 |
2030 | Easter | Sunday | Apr 21 |
2031 | Easter | Sunday | Apr 13 |
2032 | Easter | Sunday | Mar 28 |
2033 | Easter | Sunday | Apr 17 |
2034 | Easter | Sunday | Apr 9 |
I have a weekly blog at biblicaltrumpets.org.
Reach out via email: john@biblicaltrumpets.org
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