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A comment on Posical, the Positivist Calendar for Python. Parent comment

Re:Posical, the Positivist Calendar for Python by userbinator on Friday April 18, 2014 @09:06PM (#7612126)
Weekdays shift by 1 every year (365 mod 7 = 1), and once more every leap year (366 mod 7 = 2). May 4, 2014 is Sunday. In 40 years there will be 10 extra leap years so the total shift is 50 mod 7 = 1, so May 4, 2054 is a Monday.

Not so hard, is it?

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