National Hamburger Day is Thursday, May 28th, and farm fresh burger concept Farmer Boys is giving away 2,000 FREE Big Cheese Burgers! The first 2,000 guests who visit their local Farmer Boys on 5/28 and scan their receipt in Farmer Boys’ Very Important Farmer (VIF) app will be given a free Big Cheese offer to use on their next visit. The Big Cheese burger features 1/4 lb. pure beef patty topped with American cheese, lettuce, tomato, diced onion, pickles, and Thousand Island on a sesame seed bun. In addition to the giveaway, Farmer Boys is sponsoring The Great American Takeout’s Burger Bash event on 5/28 in celebration of National Hamburger Day.