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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | 1x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x 7x | // Implements the Meeus/Jones/Butcher algorithm
// https://en.wikipedia.org/wiki/Date_of_Easter#Anonymous_Gregorian_algorithm
export const getEasterDate = (year: number) => {
const a = year % 19;
const b = Math.floor(year / 100);
const c = year % 100;
const d = Math.floor(b / 4);
const e = b % 4;
const f = Math.floor((b + 8) / 24);
const g = Math.floor((b - f + 1) / 3);
const h = (19 * a + b - d - g + 15) % 30;
const i = Math.floor(c / 4);
const k = c % 4;
const l = (32 + 2 * e + 2 * i - h - k) % 7;
const m = Math.floor((a + 11 * h + 22 * l) / 451);
const n = Math.floor((h + l - 7 * m + 114) / 31);
const o = (h + l - 7 * m + 114) % 31;
return new Date(year, n - 1, o + 1);
};
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