It is not irrational to find pizzas for $ 3.14 Thursday.

March 14 is the Pi Day, an annual celebration of the mathematical constant π (pi), which is the ratio between the circumference of a circle and its diameter. The ratio in billions of dollars is rounded to 3.14.

Albert Einstein was born on Pi Day and, last year, astrophysicist Stephen Hawking died during the prepared holidays.

Pi Day, not to be confused with Pie Day in January, is a day dedicated to the sale of pizzas, pastries and pastries.

In addition to calculating your savings, it's a fun day with mathematics, said Graham Leuschke, professor of mathematics at Syracuse University. He said you can search for your birthday in π numbers and create a pi-ku similar to a haiku poem.

PiDay.org, which is called the official Pi Day website, offers other ideas for activities to celebrate this day.

WHAT IS PI DAY? All you need to know about the celebration

MATH FUN: This Google employee set a record by calculating Pi at 31.4 billion digits

Pi Day Deals

Here are the offers available to participating institutions, unless otherwise indicated. For added security, always check with your nearest location before leaving. In addition, some will ask you to have a restaurant app or be registered to receive emails.

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Babbo Italian Eatery: The chain of locally owned Italian restaurants, located on the Phoenix Underground, will offer eight 8-inch cheese pizzas for $ 5 all day. The limit is four per person and the offer is available for dinner or to go out. Babbo restaurants are located in Glendale, Queen Creek, Cave Creek, Scottsdale, Mesa, Surprise, Phoenix and Tempe.

BJ's Restaurant & Brewhouse: Get yourself a mini-pizza at one cooking for $ 3.14 Thursday. Dining room only. Learn more at www.bjsrestaurants.com/piday.

Blaze Pizza: The chain's smartphone app is needed to secure the $ 3.14 Pi Day Thursday deal on custom pizzas. One per order and at the restaurant only.

Cicis: Thursday, buy an adult buffet and a glbad and get a second adult buffet for $ 3.14 with a coupon.

Domino's: Not specific to Pi Day, but until April 28, Domino's offers Piece of the Pie Rewards members an easy way to earn points that can be redeemed for a free Domino's pizza, regardless of the brand pizza that they buy. The latest version of Domino's mobile app is needed to "scan a pizza or eligible image of a pizza." For more information, visit www.pointsforpies.com.

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Cooked pie: From 2 pm To close Thursday, get a unique pizza for $ 3.14 with the purchase of a drink. Limit of one per person and not valid for third party delivery services.

Giordano:Giordano's restaurants in Paradise Valley and Peoria offer $ 3.14 off each order of important pizza. A wide and deep pizza contains 10 slices and can feed 4 to 6 people. A large thin-crust pizza contains 24 slices and can feed 4 people.

Hungry Howie: Until Thursday, when buying any Howie Bread at the regular menu price, get a medium sized pizza, for a meal, at $ 3.14 with the promotional code 19PI. Perform orders only. Locations in Florida do not participate in this promotion.

My pie: All the clbadic pies cost $ 5 all day.

Piéologie: Buy a Thin Artisan Pizza, get one for $ 3.14 Thursday. In addition, Pie Life Rewards members making a Pi purchase will receive a $ 2 discount on their next order. The chain also hosts the "Perfect Pieology Pull" cheese contest. "Customers simply go to Pieology, roll up their sleeves, start shooting and document their best efforts," the company said in a statement. "After sending their photo or video posts to Instagram using the #perfectpieologypull hashtag, the public will vote for the top five entries and the best draw will be named champion and will receive a $ 50 Pieology gift card."

Pizza and Wine Sauce: Cheese pizzas cost USD 3.14 if guests mention 'Pi Day' when ordering. This offer is available in all Sauce restaurants, for dinner only and is limited to one per guest per visit.

7 eleven: With the 7Rewards app, get a slice of pizza for 50 cents. Or buy a whole pie in store and get 314 7Rewards bonus points. With 7NOW, the convenience store chain's delivery service, get up to two whole pizzas at $ 3.14 each.

Spinelli & # 39; s Pizzeria: This Tempe pizzeria will offer its Philadelphia style pizza slices at just $ 3.14 each. The offer does not include toppings nor taxes.

Villa Italian cuisine:Get a real size Neapolitan cheese pizza for $ 3.14. To take advantage of this, visit VillaItalianKitchen.com/PiDay to download a coupon for a Neapolitan cheese pizza at a special price of $ 3.14 on March 14th.

More offers from Pi Day

AZ Food Crafters:All AZ Food Crafters handmade pies cost $ 3.14 each day. The offer is valid only in-store and is limited to 10 per customer.

Bashas supermarkets: Eight-inch pies with apple, apple, peach, cherry, pumpkin and blueberry flavors will be available for $ 3.14 all day.

Bojangles': Get yourself three sweet potato pies for $ 3.14 Thursday until stocks last at participating stores. No coupon or application offer necessary.

Boston Market: With a Pi Day coupon on Thursday, get a free roast chicken pie with the purchase of another pie and drink it in one of more than 450 locations in the United States. The coupon is available at www.bostonmarket.com.

California Pizza Cuisine: Get a slice of lime pie for $ 3.14 Thursday.

Cheddar scratch cuisine: You can order the restaurant's homemade chicken pie before Thursday or take it home and get a second free pie to cook at home. No coupon is needed and Cheddar's says it will provide the cooking instructions. Learn more at www.cheddars.com/pieday.

Cider body:Mesa Brewery offers all ciders for $ 3.14, including Pumpkin Pie Operation, Peach Cobbler Cask, Old Maple Barrel Pumpkin Pie and Lime Pie .

Kroger: The pies selected cost $ 3.14 for Pi Day, including apple, cherry, peach and pumpkin pies.

Marie Callender: Get a free pie slice on Thursday with the purchase of a full-rate adult menu and a coupon posted on www.mariecallenders.com/coupon-piday. Not combinable with other promotions such as Kids Eat Free, happy hour menu, lunch combos and daily specials.

Schlotzsky: The casual clothing chain celebrates National Apple Potato Day on Thursday. Receive a bag of potato chips at the purchase of a main course.

Starbucks: The coffee giant has one of its Happy Hour on the Pi day. From 3pm Thursday, buy a large or larger espresso drink or a mixed drink Frappuccino and get one for free. This offer has been charged to Starbucks Rewards member accounts. Non-members can sign up for this offer by creating an account on Starbucks.com. You can add a Starbucks Gift Card to the account or choose an instant digital card when creating the account.

Sweet provisions:Savor a portion of all Sweet Provisions pies for just $ 3.14 all day.

Whole Foods Market: The big pies at the bakery are $ 3.14 less than the normal price on Thursday. Varieties vary by region.

More offers: Some local pizzerias, smaller chains and bakeries will also celebrate the Pi day with promotions. Check the social media accounts for additional offers.

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