Did you know you can determine the day of the week of any date in history just using your brain? Seriously! What day was March 12, 1937? A Friday! Get a pencil and paper and watch the videos below to learn how to do this yourself 🙂
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Here is a printable .pdf cheat sheet of the algorithm: https://drive.google.com/file/d/0B1LQCTUpV3kJUE9iM0JiTXFVTVk/view?usp=sharing&resourcekey=0-EX6aMrCwejGaJ0mUkC9jIA
Part 1: Introduction - http://www.youtube.com/watch?v=bB94KAwJgpI&feature=share&list=PLIhXfpwjaWJov5K36sI3_95qn-61igj-B
Part 2: Day Codes - http://www.youtube.com/watch?v=QLv8iWZLY2s&feature=share&list=PLIhXfpwjaWJov5K36sI3_95qn-61igj-B&index=1
Part 3: Day Codes cont. - http://www.youtube.com/watch?v=7eL62HqEjCk&feature=share&list=PLIhXfpwjaWJov5K36sI3_95qn-61igj-B&index=2
Part 4: Month Codes - http://www.youtube.com/watch?v=UM_eZbnAU1w&feature=share&list=PLIhXfpwjaWJov5K36sI3_95qn-61igj-B&index=3
Part 5: Year Codes - http://www.youtube.com/watch?v=2VikkG65pwc&feature=share&list=PLIhXfpwjaWJov5K36sI3_95qn-61igj-B&index=4
Part 6: Changing Centuries - http://www.youtube.com/watch?v=22a2ILzcmSk&feature=share&list=PLIhXfpwjaWJov5K36sI3_95qn-61igj-B&index=5
Part 7: Finished Examples - http://www.youtube.com/watch?v=Xg65RwhetPA&list=PLIhXfpwjaWJov5K36sI3_95qn-61igj-B&feature=share&index=6
In this video series we will show you a really neat math trick (really just an algorithm) that will quickly let you determine the day of the week for any calendar date. This algorithm can even be done in your head to impress your friends!
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