National Cheeseburger Day will see Burger King, Dairy Queen, Buffalo Wild Wings and Sonic offer free cheeseburgers with purchase. White Castle will give customers a free slider with a promo code to ...
Friday is considered one of the cheesiest and beefiest days of the year. Sept. 18 is National Cheeseburger Day and restaurants are celebrating the made-up food holiday with discounts and free burgers.
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