Jet’s Pizza has been celebrating 41 years of business in August. To show its appreciation and thank loyal customers, Jet’s will offer a 41% discount on August 26, the day the first Jet’s Pizza opened back in 1978.

The one-day-only promotion is valid for all menu-priced pizzas and can be redeemed for pickup at all locations online with the code JETS41.

“We love to have some fun and shake things up a bit every year on our anniversary,” says John Jetts, president of Jet’s America, Inc. “It is the perfect opportunity for us to show some love back to our customers who have helped make Jet’s Pizza what it is today.”

In 1978, brothers, Eugene and John Jetts opened their first store together in Sterling Heights, Michigan, as Jetts Party Shoppe and Pizzeria. The company has now grown to more than 350 stores in 20 states. Jet’s is known for its Detroit-style, deep dish pizzas.