Day of Week

This site explains how to calculate in your head (in often less than one second) the day of the week for any calendar date. It also explains how to calculate the day, month or year when one of those other elements of a date is unknown but the day of the week is known. There is no faster or simpler formula out there.

  • Materials for 3/7/2012 KCDC Class

Ed's Notes

Introduction

History of Calendar

How I  Started This

Why I am Teaching This

The Formula  and Rules

Miscellaneous

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  • NOTICE: Alternative methods for computing Year Value

Main Menu

Welcome
Main Menu (also below)
About this site

CALCULATION TECHNIQUES
¶ How to Calculate the Day of the Week
¶ How to Calculate the Day
¶ How to Calculate the Month
¶ How to Calculate the Year
¶ How to Calculate the Century

TABLES
¶ Table for Century Values
¶ Table for Month Values
¶ Table for Day of Week
¶ Table for Year Values

COMPETENCY TEST
¶ Test Introduction
¶ Test itself
¶ Test Scorecard

MISCELLANEOUS
¶ HELPFUL HINTS
¶ The use of Color in this Technique
¶ FAQs
¶ Help Desk
¶ Worksheet for DOW Calculations
¶ The Formula Expressed in Mathematics
¶ Examples
¶ The Gregorian Calendar (WikiPedia)
¶ The Power of Seven (From Economist)
¶ Visual (Traditional) Perpetual Calendars
¶ Coming Soon (To Do)
¶ The Library
¶ Aides in Learning (Games)
¶ Glossary


My sincere thanks to Pope Gregory XIII for creating the calendar in 1582.

Which design do you think best represents this technique?


Seven-side polygon

Seven-point star

Seven-section circle
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