What is Pi Day?
Pi Day celebrates the mathematical constant known as pi (π). According to Scientific American, pi is the ratio of the circumference of any circle to the diameter of the circle. No matter how big or small the circle is, the ratio will always equal pi. Pretty cool, huh?
The value of pi is 3.141592653589793238, but when shortened to 3.14, it becomes clear why we celebrate National Pi Day on March 14 every year. Restaurants and retailers use this as an opportunity to offer savings, such as $3.14 deals and 31.4% discounts.
When is Pi Day?
This year, National Pi Day falls on Saturday, March 14, 2026. Mark your calendars! We suggest looking for Pi Day savings in the week leading up to the mathematical holiday.
“Pi Day deals can look playful, but the smartest shoppers treat them like any other limited-time promotion. The strongest offers are often tied to rewards accounts or app ordering, so a little prep ahead of March 14 can make the difference between seeing a deal advertised and actually being able to redeem it,” says Sarah Williams, veteran savings analyst.
Who has Pi Day deals?
Some of the most popular Pi Day deals include two of our favorite things… pizza and, you guessed it, pie! Pi Day deals are most commonly found at pizza chains, pie shops, bakeries, convenience stores and restaurants. We’ve seen offers for buy-one-get-one deals, discounted pizzas, limited-time rewards perks and free slices of pizza or pie with purchase. Be sure to look for those $3.14 specials!
We’ve also seen Pi Day deals applied to tech purchases in the past, including Dell, where shoppers could get 17% off around March 14. (3 + 14 = 17. Get it?) We’ve seen a Pi Day Sale at Lenovo as well, so keep your eyes peeled!