EasterDay

Calculate first easter day for the given year using algorithm of Oudin.

Function EasterDay(Jaar)

C = Div(Jaar,100)
N = Jaar - 19 * Div(Jaar,19)
K = Div((C - 17),25)
I = C - Div(C,4) - Div((C - K),3) + 19 * N + 15
I = I - 30 * Div(I,30)
I = I - Div(I,28) * (1 - Div(I,28) * Div(29,(I + 1)) * (Div((21 - N),11)))
J = Jaar + Div(Jaar,4) + I + 2 - C + Div(C,4)
J = J - 7 * Div(J,7)
L = I - J
M = 3 + Div((L + 40),44)
D = L + 28 - 31 * Div(M,4)

R = D : "-" : M : "-" : Jaar

Ans = Iconv(R,"D-DMY[2,2,4]")