National Hamburger Day is Wednesday, May 28, and many burger spots like Wendy's, Burger King, Shake Shack, Smashburger and Whataburger have specials.

Check out every restaurant celebrating with cheap (or free!) burgers below: You guessed it — Burger King comes prepared to celebrate hamburgers. The chain is recognizing National Hamburger Month in May,

It is National Hamburger Day in the U.S. and restaurants across the land have deals on the All-American classic. National Day Calendar which keeps track of fun, unique and sometimes quirky national days lists May 28 as National Hamburger Day.