Pi Day | March 14 Annually

Pi Day is a fun holiday meant to celebrate the mathematical constant of Pi, or π. The event is observed each year on March 14, which is taken from the first three digits of Pi: 3.14. Pi Day was recognized by the U.S. House of Representatives in 2009 and UNESCO has designated Pi Day as the International Day of Mathematics in 2019. Shop funny Pi Day t-shirts here for math fans!

I Love Pizza - Pizza Day Gift For Teacher or Math T-Shirt – I Love Pizza - Pizza Day Gift For Teacher or Math Lover! 8 View on Zazzle
Pi Day T-Shirt 3.14 Cool Funny Nerd Math Geek 2017 Rainbow – Great Stuff For Math lover or it could be a gift for your family, dad, mom, son, daughter, brother, sister, grandpa, grandma, uncle, aunt, grandkid, grandchild,... View on Amazon
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I Love Pizza - Pizza Day Gift For Teacher or Math T-Shirt – I Love Pizza - Pizza Day Gift For Teacher or Math Lover! 16 View on Zazzle
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I Love Pizza - Pizza Day Gift For Teacher or Math T-Shirt – I Love Pizza - Pizza Day Gift For Teacher or Math Lover! 10 View on Zazzle
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