Easter is simply the first Sunday after the first full moon following the vernal equinox.
This combination of solar (equinox) and lunar (full moon) calendars ensures that Easter is always either on the same weekend as the Jewish holiday of Passover, or it's a full month off (because the Jewish calendar is lunar). On Fri, Sep 11, 2009 at 2:31 PM, Sherlock, Ric <[email protected]>wrote: > I know I will find it useful personally. Working when the Easter break is > each year, is a continuous frustration for me! > > > From: R.E. Boss > > I do not know how relevant this is, but it appears to be useful, > > sometimes. > > > > NB. from > > http://dev.whydomath.org/Reading_Room_Material/ian_stewart/2000_03.html > > EasterSunday =: 3 : 0 NB. y is year(s) > > A=. 19 | y > > 'B C'=. 100 (<....@%~ ,: |) y > > 'D E'=. 4 (<....@%~ ,: |) B > > G=. <. 25 %~ 13 + 8 * B > > H=. 30 | 15 + B + (19*A) - D + G > > 'J K'=. 4 (<....@%~ ,: |) C > > M=. <. (A + 11 * H) % 319 > > L=. 7 | 32 + M + (2 * E + J) - H + K > > N=. <. (90 + H + L - M) % 25 > > P=. 32 | 19 + H + L + N - M > > |:y,N,:P > > ) > > > > EasterSunday 2000 + i.10 > > 2000 4 23 > > 2001 4 15 > > 2002 3 31 > > 2003 4 20 > > 2004 4 11 > > 2005 3 27 > > 2006 4 16 > > 2007 4 8 > > 2008 3 23 > > 2009 4 12 > > EasterSunday 1000000 NB. from Ian Stewart > > 1000000 4 16 > > > > > > From the link above " Under the rules of the Gregorian calendar, the > > cycle > > of Easter dates repeats exactly after 5,700,000 years." > > > > > > R.E. Boss > > > > > > > > > > ---------------------------------------------------------------------- > > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > -- Devon McCormick, CFA ^me^ at acm. org is my preferred e-mail ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
