National Burger Day, observed in the United States on May 28 each year, prompts participating restaurants to offer promotions. Multiple outlets report that the day—also referred to by some as National Hamburger Day—is marked with limited-time discounts and free items tied to popular burger chains. The coverage highlights that major brands, including Burger King and Shake Shack, participate with special offers on the date. Other restaurants across the country are also described as joining in, with deals presented as a way to encourage customers to buy burgers as summer barbecue season begins. The exact nature of individual offers varies by location and typically depends on the restaurant’s participation and available inventory. Overall, the reports present National Burger Day as a recurring annual food promotion centered on burgers, with participating chains publicizing specific deal and freebie details for customers on May 28.