National Cheeseburger Day is celebrated every year on September 18. It honors the cheeseburger, a hamburger topped with melted cheese, and many U.S. restaurant chains mark the day with discounts and free-burger deals.
When is National Cheeseburger Day?
National Cheeseburger Day takes place on September 18 annually. In 2026 that date falls on a Friday. The observance is dedicated to one of the most popular foods in American culture: grilled beef layered with a slice of melted cheese on a bun.
What does the day celebrate?
The day celebrates the cheeseburger itself, a variation on the hamburger that has become a global favorite. It gives fans a reason to enjoy their preferred style, from a simple single with American cheese to loaded, multi-patty creations.
Who invented the cheeseburger?
The cheeseburger’s exact origin is debated. One widely repeated story credits Lionel Sternberger, who is said to have added a slice of cheese to a cooking hamburger around 1926 while working at his father’s Pasadena, California, sandwich shop. Other claims exist, so the invention cannot be pinned to a single, verified source.
How is National Cheeseburger Day celebrated?
Restaurants are central to the day. Major chains routinely offer discounts, app-only offers, and buy-one-get-one promotions on September 18. Fans also celebrate by cooking cheeseburgers at home or visiting a favorite local burger spot.
| Detail | Information |
|---|---|
| Date | September 18 (annual) |
| Type | Unofficial food observance |
| Focus | The cheeseburger |
| Common activity | Restaurant deals and homemade burgers |
Why is the cheeseburger so popular?
The cheeseburger’s appeal lies in its simplicity and flexibility. At its core it is grilled beef and melted cheese on a bun, but it invites endless variation, from added bacon, lettuce, tomato, and pickles to regional sauces and specialty cheeses. That adaptability, along with its availability at everything from fast-food counters to sit-down restaurants, has helped make it a fixture of American dining and a favorite far beyond the United States.
Ways to celebrate National Cheeseburger Day
There are many easy ways to take part in the day. The most common is simply enjoying a cheeseburger, whether ordered out or cooked at home.
| Idea | How to do it |
|---|---|
| Grab a deal | Check chains for discounts and app-only offers on September 18 |
| Cook at home | Make a custom cheeseburger with your favorite cheese and toppings |
| Try somewhere new | Visit a local burger spot you have not been to before |
| Share it | Post your cheeseburger and tag the day on social media |
Is National Cheeseburger Day an official holiday?
No. Like most food-themed days, National Cheeseburger Day is an unofficial celebration rather than a government-sanctioned public holiday. That does not stop it from being widely recognized, especially by restaurants and burger enthusiasts who use the date to promote deals and celebrate a classic dish.
Frequently Asked Questions
When is National Cheeseburger Day?
It is observed every year on September 18.
What does it celebrate?
The cheeseburger, a hamburger topped with a slice of melted cheese.
Who invented the cheeseburger?
A popular story credits Lionel Sternberger in 1920s Pasadena, California, though accounts vary.
Are there deals on National Cheeseburger Day?
Yes, many chains run discounts and free-burger promotions.
Is it an official holiday?
No, it is an unofficial food observance rather than a government holiday.