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
Auth: seangard@como.maths.usyd.edu.au

# 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.

Abstract:

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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