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/// <summary> | |
/// Get Catholic easter for requested year | |
/// </summary> | |
/// <param name="year">Year of easter</param> | |
/// <returns>DateTime of Catholic Easter</returns> | |
public static DateTime GetCatholicEaster(int year) | |
{ | |
var month = 3; | |
var a = year % 19 + 1; | |
var b = year / 100 + 1; | |
var c = (3 * b) / 4 - 12; | |
var d = (8 * b + 5) / 25 - 5; | |
var e = (5 * year) / 4 - c - 10; | |
var f = (11 * a + 20 + d - c) % 30; | |
if (f == 24) | |
f++; | |
if ((f == 25) && (a > 11)) | |
f++; | |
var g = 44 - f; | |
if (g < 21) | |
g = g + 30; | |
var day = (g + 7) - ((e + g) % 7); | |
if (day > 31) | |
{ | |
day = day - 31; | |
month = 4; | |
} | |
return new DateTime(year, month, day); | |
} |
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/// <summary> | |
/// Get Orthodox easter for requested year | |
/// </summary> | |
/// <param name="year">Year of easter</param> | |
/// <returns>DateTime of Orthodox Easter</returns> | |
public static DateTime GetOrthodoxEaster(int year) | |
{ | |
var a = year % 19; | |
var b = year % 7; | |
var c = year % 4; | |
var d = (19 * a + 16) % 30; | |
var e = (2 * c + 4 * b + 6 * d) % 7; | |
var f = (19 * a + 16) % 30; | |
var key = f + e + 3; | |
var month = (key > 30) ? 5 : 4; | |
var day = (key > 30) ? key - 30 : key; | |
return new DateTime(year, month, day); | |
} |
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