National Hamburger Day is May 28, and many burger spots like Burgerville, Dairy Queen and more have deals. Here's what to know.

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

National Hamburger Day is Wednesday, May 28, in California and many burger spots like Burger King, Shake Shack, and Smashburger have specials.

No one knows how May 28 became the unofficial hamburger holiday, according to the National Day Calendar, but its proximity to Memorial Day and the outdoor grilling season could be a reason. Hamburgers ...

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 Whataburger have specials.

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