It's National Pi Day (March 14 or 3.14) and several business are offering special deals in honor of the unofficial national holiday.
Pizza Hut is offering pizza lovers the chance to win free pizza.
If you are the first person to answer three tough math problem on Pizza Hut's website, you could win free pizza for 3.14 years, which is reportedly worth $1,600.
— Pizza Hut (@pizzahut) March 14, 2016
Other deals include Blaze Pizza, which is offering pizza for $3.14 all day.
— Blaze Pizza (@BlazePizza) March 9, 2016
Whole Foods will be discounting their sweet pies by $3.14 and giving $2 off of their take-and-bake pizzas.
— Whole Foods Market (@WholeFoods) March 11, 2016
In addition, Shake Shack is celebrating Pi Day with $3.14 Pie Oh My Concretes at select locations.
— SHAKE SHACK (@shakeshack) March 14, 2016