National Cheeseburger Day
Friday, September 18, 2026 · September 18 every year
The story
Celebrate the iconic and delectable National Cheeseburger Day on September 18 by sinking your teeth into the history and evolution of this American favorite. The cheeseburger, a mouthwatering variation of the classic hamburger adorned with a slice of cheese, has a fascinating origin dating back to the late 1920s. The credited inventor, 16-year-old Lionel Sternberger, serendipitously introduced the world to the cheeseburger in 1926 while working at his father's sandwich shop, The Rite Spot, in Pasadena, California. The story goes that Sternberger, out of sheer curiosity, placed a slice of American cheese on a sizzling hamburger, giving birth to this culinary delight. Although the cheeseburger concept is commonly attributed to Sternberger, other establishments across the country claim their stake in its invention. In 1928, Los Angeles' O'Dell's featured a cheeseburger on its menu, while Kaelin's Restaurant in Louisville, Kentucky, asserts that they introduced it in 1934. The debate over the true birthplace of the cheeseburger persists, with the term officially trademarked by Louis Ballast of Humpty Dumpty Drive-In in Denver in 1935. National Cheeseburger Day is a yearly celebration of this savory creation, tracing its roots to the Roaring Twenties. While the classic cheeseburger consists of a meat patty topped with cheese, variations abound. Fast-food joints often use processed cheese, but cheddar, mozzarella, Swiss, pepper jack, and blue cheese can also grace your burger. The ensemble of toppings is diverse, including bacon, tomato, pickles, onion, avocado, guacamole, sautéed mushrooms, chili sauce, ketchup, mayonnaise, and mustard.
About National Cheeseburger Day
- When is National Cheeseburger Day?
- National Cheeseburger Day falls on Friday, September 18, 2026 (September 18 every year).
- Which country is National Cheeseburger Day from?
- National Cheeseburger Day is on the United States Food Holidays calendar.
- How do you celebrate National Cheeseburger Day?
- There isn’t a single official way to celebrate. Read the story on this page, then cook or order cheeseburger. The iOS app’s Where to Eat can help you find cheeseburger nearby — this website does not list restaurants.
- Does National Cheeseburger Day happen every year?
- Yes. National Cheeseburger Day recurs on September 18 every year.