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

Materials for 3/7/12 KCDC Class "How to calculate the day-of-the-week for any date, quickly and in your head"

Below are the materials for the class, "How to Compute the Day-of-the-Week for any Date, in your had and quickly."

Click here for a link to the class at KCDC's website.


Agenda for Class.       (ED's notes)


Page 1 - Steps 1-3 worksheet for calculating a day-of-the-week (a.k.a. Weekday, DoW).


Page 2- Deriving the Tables for Weekday, 7X, Century.


Page 3- Deriving the Year Table.


Page 4- Steps involved in calculating the Year Value.


Page 5- The Basic Technique for Calculating the Day-of-the-Week.


Page 6- Calculating the Month, Day, Century and Year if you know the Weekday.

Appendices

Tables: Month Value; Century Value; Year Value: (by Year then Value) or  (by Value then Year)


A view of the Brain and the purple box.


What that purple box  will look like after this class.


The Calendar Cards


Gaudemas Igitur


Pocket Guide (coming soon)


Click here to return to Materials for Class.

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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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