Pi Day lands on Friday, March 14 this year. And while it might seem like an average day and just the start of an ordinary weekend, it’s not.
When is National Pi Day?
March 14th is officially National Pi Day, the day when we celebrate the number that represents the ratio of a circle’s circumference to its diameter. Pi is typically rounded to 3.14, but it can go on and on and on forever. According to Guinness World Records, the most accurate value for Pi is more than 62 trillion digits.
However, besides the number, you can score pretty much anything on National Pi Day in Chicago for $3.14. Here are the best National Pi Day 2025 deals, from actual pie to pizza pie.
National Pi Day deals in Chicago:
7-Eleven
Loyalty members can get any flavor of large pizza for $3.14 in 7-Eleven, Speedway, and Stripes stores—the offer is limited to one transaction, two per day.
Blaze Pizza
At any Blaze Pizza in Chicago, you can build your own 11-inch pizza for just $3.14.
Burger King
Burger King is offering a free Hershey’s sundae pie with a $3.14 purchase as part of its week of breakfast deals.
California Pizza Kitchen
CPK rewards members can get an Original BBQ chicken, pepperoni, or traditional cheese pizza for $3.14 with a dine-in purchase of $25.
Chiya Chai
Join Chiya Chai in celebrating Pi Day on March 14th with a savory pie for just $3.14 when you follow them on socials and tag them in your story through March 14th!
First Slice Pie Cafe
At its three North Side locations, First Slice is serving up $3.14 pie slices and $6.28 mini pies all day Thursday. Whole pies will also be 20 percent off.
Pizza Hut
Pizza Hut is offering a free large one-topping pizza with the purchase of a large menu-priced pizza.
Sweet Mandy B’s
In celebration of the most delicious day of the year, Sweet Mandy B’s, in Lincoln Park and Streeterville, is serving up a Pi Day special on Friday, March 14. For one day only, both locations will offer $3.14 slices of pie all day.
Taco Bell
Get a Taco Bell Mexican Pizza for just $3.14!