It's National Pi Day, as in the mathematical constant 3.14, not the kind you eat. But over the years, it's become that too: A bunch of pizza places have Pie Day deals. Here are a few national chains running promos:
1. Papa Johns has a buy-one-get-one deal. Rewards members who buy a large one-topping pizza can get a second one for $3.14.
2. Cicis has one-topping pizzas for $3.14 with the promo code "PIDAY". Or you can get $3.14 off their buffet.
3. Blaze Pizza is selling 11-inch pizzas for $3.14.
4. 7-Eleven rewards members can get pizzas for $3.14. It applies at Speedway and Stripes stores too.
Of note: Two of the biggest pizza chains, Domino's and Pizza Hut, don't have Pi Day deals this year.
Sources: CNET / Good Housekeeping
Article Pic: Getty Images