Computus Meeus Julian algorithm Meeus Julian algorithm

| Expression | Y_is_2008 | Y_is_2009 | Y_is_2010 | Y_is_2011 |
|---|---|---|---|---|
| a = Y mod 4 | a = 0 | a = 1 | a = 2 | a = 3 |
| b = Y mod 7 | b = 6 | b = 0 | b = 1 | b = 2 |
| c = Y mod 19 | c = 13 | c = 14 | c = 15 | c = 16 |
| d = (19c + 15) mod 30 | d = 22 | d = 11 | d = 0 | d = 19 |
| e = (2a + 4b − d + 34) mod 7 | e = 1 | e = 4 | e = 0 | e = 1 |