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 Ate Some Pie And It Was Delicious I Ate Some Pi T-Shirt – I Ate Some Pie And It Was Delicious I Ate Some Pi Math Classic T-Shirt Copy View on Zazzle
Pi T-Shirt 3,14 Pi Number Symbol Math Science Gift T-Shirt – If you love mathematics this sarcastic funny geek 3,14 tee is the one for you! Perfect for a birthday Pi day March 14 or Christmas present... View on Amazon
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Pi, π, spiral, Science, Mathematics, Math, Irratio T-Shirt – Pi, π, spiral, Science, Mathematics, Math, Irrational Number, Sequence Classic T-Shirt View on Zazzle
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Come To The Math Side We Have Pi - Math Geek & Nerd T-Shirt – Come To The Math Side We Have Pi is a funny Math nerd/geek Pi Day shirt for kids, youth, boys, girls, men, and women. math teacher... View on Amazon
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Cant Stop Pi Wont Stop Math Pi Day Funny Math Teacher T-Shirt – Celebrate a happy Pi Day with this funny mathematics pun tee featuring the greek letter pi used as the mathematical symbol for the irrational number that... View on Amazon
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Happy Pi Day 3.14 March 14Th Math Teacher Vintage T-Shirt – Are you looking for some cool Pi Day merch to celebrate this mathematical day in style? You'll love this irrational mathematical ratio of 3.14. This is... View on Zazzle
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Pi 3.14 First 2,000 Digits of Pi Math T-Shirt for Pi Day – This apparel is printed using the actual first 2,000 digits of Pi. Pi Day is celebrated on March 14th all around the world. Pi is the... View on Amazon
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I Ate Some Pie And It Was Delicious I Ate Some Pi T-Shirt – I Ate Some Pie And It Was Delicious I Ate Some Pi Math Classic T-Shirt View on Zazzle
Python Pithon Pi Symbol Funny Math Teacher Pi Day T-Shirt – Python Pithon Pi Symbol Funny Math Teacher Pi Day; Lightweight, Classic fit, Double-needle sleeve and bottom hem. View on Amazon