blank'/> Promoting Success: Day for any Date Math Trick for Kids
         

Sunday, February 6, 2011

Day for any Date Math Trick for Kids

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Ultimate Mental Math Trick – How To Tell The Day For Any Date by: Stephen Tan

Can you tell the day for any date without a calendar at hand? Is that really possible? It is actually a simple skill that any one can learn. It is also very practical as you may always consider your availability for an activity or an event or you just need to know the day of anyone’s birthday. All you need is a little bit of practice, then you can quickly and easily tell the day of the week of practically any date in history or in the future.


Here’s the Secret


You may need to memorize some codes to learn this trick, but they are very easy to remember.


First, we assign a code number to every day of the week.

Monday – 1

Tuesday – 2

Wednesday – 3

Thursday – 4

Friday – 5

Saturday – 6

Sunday – 7 or 0


Second, we assign a code number for every month of the year. These month codes are used for every year with two exceptions. In a leap year, the month code for January is 5* and for February is 1*.


The month codes with the corresponding mnemonics are as follows:

January – 6* (WINTER has 6 letters)

February – 2* (2nd month)

March – 2 (You march with 2 feet)

April – 5 (APRIL has 5 letters)

May – 0 (May0 for mayonnaise)

June – 3 (JUN has 3 letters)

July – 5 (JULIE has 5 letters)

August – 1 (August begins with an A, the 1st letter)

September – 4 (SEPT has 4 letters)

October – 6 (Halloween TRICKS or TREATS have 6 letters each)

November – 2 (2nd last month)

December – 4 (XMAS has 4 letters)


Third, we assign a code number for every year. For example, the year code for 2011 is 6.


The Formula Day of the week = (Month code + Date + Year Code) mod 7


Note: mod 7 indicates the remainder you get when you divide by 7.


Examples What is the day for July 16, 2011?

Day of the week = (Month code + Date + Year Code) mod 7

Day of the week = (5 + 16 + 6) mod 7 = 27 mod 7 = 6 (Therefore, it’s a Saturday)


What is the day for December 25, 2011?

Day of the week = (Month code + Date + Year Code) mod 7

Day of the week = (4 + 25 + 6) mod 7 = 35 mod 7 = 0 (Therefore, it’s a Sunday)


Hooray! With constant practice, you are now ready to be the walking calendar. Amaze your friends, colleagues, students, teachers and everyone else.

For further information on how to find the year code, check out my blog at http://www.themathblog.com/.

About The Author
Stephen Tan has been teaching mathematics for almost ten years now. He has coached and trained students to compete in mathematics competition and through his leadership has won various mathematics awards. His teaching of mathematics is fun and very logical according to many students. He also teaches students to solve mathematics problems the shortest and easiest way. And now he reveals his secret on how to tell the day for any date without the aid of a calendar.

The author invites you to visit:http://www.themathblog.com/

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Shelly Anton is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. ** This means there are Amazon affiliate links in these blog posts. This does not mean you pay a dime more when you purchase a product through the link. It just means I am trying to save you valuable teacher time by making it easier for you to find valuable resources for your students, and I earn a few cents for my research and time. Thank you for all you do for kids!

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