Comment Comment by phpdave11 For figuring the doomsday of a particular year, you can use the Odd+11 rule.Let X be the last two digits of a year.If X is odd, add 11.Divide X by 2.If X is odd, add 11.Let Y = 7 − (X mod 7).Count forward Y days from that century's anchor day to get the year's doomsday.https://arxiv.org/pdf/1010.0765 parent phpdave11 2 months ago
Let X be the last two digits of a year.
If X is odd, add 11.
Divide X by 2.
If X is odd, add 11.
Let Y = 7 − (X mod 7).
Count forward Y days from that century's anchor day to get the year's doomsday.
https://arxiv.org/pdf/1010.0765