For National Hamburger Month in May, the restaurant chain has added to the menu The Great American Burger Trio – a cheeseburger, fries, and pie – for $9.99. Also, you can join the Perkins e-Club loyalty program and get 20% off your next visit.

National Hamburger Day is Wednesday, May 28, and many burger spots like Wendy's, Burger King, Shake Shack, Smashburger and Whataburger have specials.

Several chains around the country are offering deals and discounts on hamburgers to celebrate the American fast food staple.