
National Cheeseburger Day 2026: Major Chains Launch Free and Discounted Burger Promotions
On September 18, 2026, National Cheeseburger Day triggered a wave of promotions across major fast-food and casual dining chains. McDonald's, Burger King, and Dairy Queen offered free burgers with minimal purchases, while Buffalo Wild Wings and Five Guys provided buy-one-get-one-free deals. These discounts aimed to offset rising ground beef costs, which increased by 7% year-over-year, and celebrated the 1920s invention of the cheeseburger by Lionel Sternberger.







