Pizza Hut has BOGO free pizza on Pi Day.

No matter how many numbers of pi (π) you can recite, everyone can score some freebies and discounts from fast food restaurants on March 14.
ForNational Pi Day(3/14),Pizza Hutwants fans to enjoy plenty of pizza pies before and during the mathematical-inspired day.
From March 12 through March 14, guests can grab a free large one-topping pizza with the purchase of any other large pizza. You just have to use the code “FREEPIZZA” to claim the buy-one-get-one-free offer at checkout.
Plus there are even more national spots giving out deals onNational Pi Day.
Blaze Pizza’s Pi Day deal is an 11-inch pizza for $3.14.Blaze Pizza

Blaze Pizza
If Pizza Hut didn’t satisfy your cheesy cravings then head toBlaze Pizza. Customers can get an 11-inch pizza for $3.14, but the offer is only good in-store.
California Pizza Kitchen has a similar deal for its rewards members. The pizza spot is offering a $3.14 pie for dine-in guests who spend at least $25. There are three flavor options for CPK guests: plain cheese, pepperoni and barbecue chicken.
Marco’s Pizza’s Pi Day offer mirrors the discounts at Blaze and CPK. Here, visitors can get a medium one-topping pizza for $3.14 when they purchase any large pizza. Just use the code “PIDAY2024” when ordering online to get the deal.
Smoothie King’s Pi Day deal is an Apple Pie Smoothie for $3.14.Smoothie King

Smoothie King
For a break from all the savory selections, Smoothie King is offering rewards members a 20 oz. apple pie smoothie for $3.14 on Thursday. Plus,Burger Kingis handing out a free Hershey sundae to rewards members who spend $3.14 on March 14.
This is just one of the daily freebies the burger spot has this week. The fast food restaurant has a week of deals in honor of daylight saving time, many of which are breakfast oriented.
BK has a coffee deal for anyone who needs a caffeine boost on Friday. With a $1 purchase, customers can grab a free large vanilla iced coffee. Saturday is the last day of breakfast deals at Burger King. On March 16, a purchase of $1 or more guarantees a free sausage biscuit.
source: people.com