Pi Day Merch
Celebrate Pi Day in style. Wear one of these official Pi Day shirts and join the world in celebrating the best day of the year. The compliments you’ll receive will go on and on, just like the digits of pi. Perfect for anyone who wants to celebrate Pi Day, but especially great for math lovers, pun lovers, engineers, and teachers. Don’t be irrational, get these shirts today! Also make sure to check out the other Pi Day merchandise we offer! The site gets commissions for purchases made through links in this post.
Official Pi Day Shirts