Pi Day is an annual celebration of the mathematical constant pi, which represents the ratio of a circle’s circumference to its diameter. The day is observed on March 14th, or 3/14, which reflects the first three digits of pi: 3.14.

Time to celebrate the beauty and complexity of mathematics and to recognize the incredible achievements made possible by this essential field. So, whether you’re enjoying a slice of pie or competing in a math competition, take a moment to appreciate the wonder of pi and the amazing things it makes possible.

PI DAY DEALS

7-Eleven has pizza for $3.14

7Rewards and Speedy Rewards members can get any whole pizza for $3.14 at participating 7-Eleven, Speedway and Stripes locations.

The offer is limited to two pizzas per customer.

Members can also redeem the deal via the 7NOW Delivery app.

Blaze brings back Pi Day pizza promo

Blaze Pizza is offering diners any one 11-inch pizza for $3.14 (not including crust upgrades) when they download the Blaze app and join Blaze Rewards.

Get $3.14 off pizza at Casey’s

Visit Casey’s on Pi Day and take $3.14 off any large pizza.

Casey’s customers can also play Rewards Match-up on its app for a chance to score freebies through April 7.

Cicis has dine-in and takeout deals

If you dine in at Cicis, you can get $3.14 off an adult buffet and a kids’ combo for $3.14.

You can also score a pi deal if you’re looking to dine at home. Customers can get $3.14 off a large one-topping pizza when they order online for pickup or delivery with code PIDAY.

Jet’s Pizza offers discount

Jet’s Pizza customers who order online can get 20% off all menu-priced pizzas with the code 314DAY.

The offer is available for both pick-up and delivery.

Marco’s has a deal on a medium pizza

Marco’s Pizza customers who buy any large or extra-large pizza at the regular menu price can get a medium one-topping pizza for only $3.14.

Papa Gino’s has a deal on a small pizza

Get a small cheese pizza for only $3.14 with the purchase of any large or extra-large pizza. Use the code 9220 at checkout.

The offer is valid at participating locations only.

Papa Johns has a Pi Day BOGO

Papa Johns customers can buy one large one-topping pizza for the regular menu price and get a second large one-topping pizza for $3.14 with the promo code PIDAY.

Round Table Pizza offers cheesy deal

Round Table Pizza Royal Rewards members can snag personal cheese pizzas for $3.14.

The offer is valid only at participating locations.

Schlotzsky’s has a BOGO offer

Schlotzsky’s reward members can buy one pizza and get another for free at participating locations.

The offer excludes kid’s pizzas, and the free pizza must be of equal or lesser value.