[Revised 7/29/2011]

This quick summary will show you, by example, how to determine the day of the week for any date.

# First Sunday Doomsday Algorithm

A method for finding the day of the week for any date -- in your head.

## Thursday, January 27, 2011

## Wednesday, December 2, 2009

### Learn the First Sunday Doomsday Algorithm

[Revised 8/17/2011]

This longer article will show you how to determine the day of the week for any given date -- without consulting a calendar. It covers some history (of calendars and methods) and explains how this method works, and why it works.

This longer article will show you how to determine the day of the week for any given date -- without consulting a calendar. It covers some history (of calendars and methods) and explains how this method works, and why it works.

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