Pi Day is a very big day for math nerds and for people who love pizza and pie. Today is March 14, or National Pi Day, and restaurants are celebrating with $3.14 pizza deals, free pie promotions, and other discounts.

Amazon: Use Amazon coupons to get up to 10% off various Raspberry Pi kits.

Readers.com: The glasses retailer will offer 31.4% off any order on Pi Day only with promo code.

Your Pie is selling 10-inch pizzas for $3.14 on Thursday, March 14. The 2019 Pi Day deal is available for in-store orders only, while supplies last.

Download the 7-Eleven 7NOW app and you can order a pizza online for $3.14 with free delivery on Pi Day 2019. Members of the 7-Eleven 7Rewards loyalty program can also get a slice of pizza for $.50 on Thursday, March 14.
Papa John’s: Buy one pizza at regular price, get one free at participating locations for a limited time with this code. Plus, get two medium one-topping pizzas for $12.
Pizza Hut: Order online and get a large two-topping pizza for $7.99.
Plated: A meal kit designed for foodies, Plated is giving first-time subscribers free dessert for a year. Redeem by entering code PiDay on or before March 14 here.