National Cheeseburger Day 2026 is observed on Sept. 18, and multiple fast-food restaurants offer promotional deals and freebies tied to the cheeseburger. Outlets list a range of participating chains and emphasize that customers can get special items during the day.
The outlets differ mainly in how they describe the promotion. One outlet focuses on deals and freebies from large brands such as McDonald’s, Burger King, and Wendy’s, presenting the celebration as a chance for Americans to enjoy fast-food cheeseburgers. Another highlights National Cheeseburger Day deals and names additional restaurants, including Five Guys and Smashburger, alongside McDonald’s and Burger King. Both point readers toward chain-specific offers for that date, with the specific free items or discount terms described by each restaurant’s promotion.
