National Cheeseburger Day is on September 18th. It started in the 1920s.

Lionel Sternberger in California is credited with adding cheese to burgers in 1924.

The term "cheeseburger" was trademarked in 1935 in Denver.

Celebrate with free or discounted cheeseburgers from fast-food chains.

Enjoy cheeseburger-themed songs like Jimmy Buffett's "Cheeseburger in Paradise."

National Cheeseburger Day is all about delicious, cheesy, and creative burger celebrations!

Try unique cheeseburger-inspired foods like cheeseburger pizza or cheeseburger milkshakes.

Explore cheeseburger-flavored Cheetos, popular in Japan.