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07/12/2017 — Happy Permutation Day!

Today we celebrate a Permutation Day! I call days like today permutation days because the digits of the day and the month can be rearranged to form the year.

Celebrate Permutation Day by mixing things up! Try doing things in a different order today. Just remember, for some operations, order definitely matters!



  1. Henry Ricardo says:

    Did you intend to start with 07/12/2017, rather than 07/21/2017?

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