The deal is good all day tomorrow at participating locations and has been an annual tradition for the chain in recent years.
Sonic cheeseburgers consist of a beef patty, American cheese, crinkle-cut pickles, chopped onions, shredded lettuce, and sliced tomatoes with your choice of mustard, mayo or ketchup. They normally sell for around $3 or more. You can find my review of the cheeseburger here.
Photo via Sonic.
