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When Is Christmas? Mentally Convert Date To Day Of The Week

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 Brain Teasers   |   Math
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January 1, 2016 is a Friday. When will Christmas be in 2016? What about Christmas in 2055? You can do this in your head!

Blog post (text explanation): http://wp.me/p6aMk-4qQ

Doomsday Rule (previous video): https://www.youtube.com/watch?v=UsStBxY9STw

Calculating the day New Years (1/1) occurs formula derivation: https://www.youtube.com/watch?v=7iZ1TlqcqVc

More efficient methods for determining a year's Doomsday: http://en.wikipedia.org/wiki/Doomsday_rule#Finding_a_year.27s_Doomsday

An alternate method to find the day for a date: http://gmmentalgym.blogspot.com/2011/03/day-of-week-for-any-date-revised.html

If you like my videos, you can support me at Patreon: http://www.patreon.com/mindyourdecisions

Connect on social media. I update each site when I have a new video or blog post, so you can follow me on whichever method is most convenient for you.

My Blog: http://mindyourdecisions.com/blog/
Twitter: http://twitter.com/preshtalwalkar
Facebook: https://www.facebook.com/pages/Mind-Your-Decisions/168446714965
Google+: https://plus.google.com/108336608566588374147/posts
Pinterest: https://www.pinterest.com/preshtalwalkar/
Tumblr: http://preshtalwalkar.tumblr.com/
Instagram: https://instagram.com/preshtalwalkar/
Patreon: http://www.patreon.com/mindyourdecisions

Newsletter (sent about 2 times a year): http://eepurl.com/KvS0r

My Books

Here's a listing of all my books
http://goo.gl/BDlEkB

Here's a more detailed description of each book...

"The Joy of Game Theory" shows how you can use math to out-think your competition. (rated 4/5 stars on 21 reviews) http://amzn.to/1uQvA20

"Math Puzzles Volume 1" features classic brain teasers and riddles with complete solutions for problems in counting, geometry, probability, and game theory. Volume 1 is rated 4.6/5 stars on 9 reviews. http://amzn.to/1GhUUSH

"Math Puzzles Volume 2" is a sequel book with more great problems. http://amzn.to/1NKbyCs

"Math Puzzles Volume 3" is the third in the series. http://amzn.to/1NKbGlp

"40 Paradoxes in Logic, Probability, and Game Theory" contains thought-provoking and counter-intuitive results. (rated 4.9/5 stars on 7 reviews) http://amzn.to/1LOCI4U

"The Best Mental Math Tricks" teaches how you can look like a math genius by solving problems in your head http://amzn.to/18maAdo

"Multiply Numbers By Drawing Lines" This book is a reference guide for my video that has over 1 million views on a geometric method to multiply numbers. http://amzn.to/XRm7M4

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