# Pi day shirts

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Happy Pi Day! Fellow "Lost" fans please note: for today only, Pi is my constant!

Completely Irrational, if you love Math or Pi Day, this shirts for you. Check out all our Math shirts!

This shirt is adorable for March 14! Click to find more great Pi Day activities for you and your children.

Apple Pie Pi Day Shirts

TGI Pi Day - Thank God It's Pi Day shirts & gifts

Pi Day Shirt come to the dark side we have Pi by Destined4Destin on Etsy

Pi Day - March 14 birthday shirt

For Moser and Nolt. Pirates Pi Day T-shirt - justintrails.com

Math geeks will be delighted with this pi day of the century (3.14) graphic! March 14, 2015 at 9:26:53 AM/PM (or rather, 3.14.15 9:26:53) is something to celebrate in the mathematics world, a once in a lifetime event.

InsPIre | 17 Impossibly Awesome Tees To Celebrate National Pi Day