The unofficial holiday should not be confused with National Cheeseburger Day, which is Sept. 18, or National Double ...

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

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