Did you know that National Hamburger Day was a thing? You do now, and you can celebrate by scoring free or heavily discounted food from a number of popular retailers. National Hamburger Day takes place on May 28. We've scoured the country for the tastiest National Hamburger Day deals to help you celebrate this special occasion, and we have some good news: Popular names like Burger King and Dairy Queen are going hard this year with limited-time offers. Check out some of our favorites below: National Hamburger Day 2026 food deals Arby’s From May 28-31, Arby’s is offering a buy one get one free on sandwiches. This offer is valid for online and pick-up-in-store orders. There is a limit of one per person. Bad Daddy’s Burger Bar On May 28, Bad Daddy’s Burger Bar is celebrating National Hamburger Day with a $10 BD’s All-American Burger and a classic side. Big Buns Members of the Thompson Table Rewards loyalty program can get a free Classic Burger with any purchase from May 28-31.…