SMS scnews item created by Sean Gardiner at Wed 23 Mar 2016 1023
Type: Seminar
Distribution: World
Expiry: 25 Mar 2016
Calendar1: 24 Mar 2016 1300-1400
CalLoc1: New Law 024

SUMS: Gruenewald -- Calculating the date of Easter

This week’s very topical SUMS talk is being given by David Gruenewald.  Pizza and drinks
will be available afterwards.  


The date of Easter (Sunday) changes from year to year.  In fact part of the development
of the modern-day (Gregorian) calendar was because the date of Easter seemed to move out
of season too much.  We shall study the date of Easter from a mathematical perspective.
Can Easter be on the same date in consecutive years? Will the movable date of Easter
ever coincide with the fixed date of Christmas (from a purely mathematical perspective)?
Like all interesting questions, the answer is yes and no.  All shall be revealed on "the
day before the day before the day before Easter" (a phrase I was considering to use in
an alternative talk title for my Thursday talk).

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