National Cheeseburger Day

National Cheeseburger Day, observed on September 18, is a delicious celebration of one of America’s most beloved comfort foods. It honors the classic combination of a juicy burger, melted cheese, and a bun, along with the countless toppings and creative variations that make cheeseburgers a favorite for people of all ages.

Whether enjoyed at a neighborhood diner, a backyard cookout, or a favorite restaurant, the day invites everyone to savor a cheeseburger their way. From traditional cheddar and pickles to gourmet toppings and plant-based patties, National Cheeseburger Day is a tasty excuse to share a meal, try something new, and appreciate this enduring culinary classic.

National Cheeseburger Day is observed annually on **September 18**. The observance celebrates one of the United States’ best-known casual foods: a hamburger topped with melted cheese, usually served in a bun with condiments and additional toppings. Although the day is widely recognized on food-themed calendars, its original creator and first official sponsor are not clearly documented. As a result, the history of the observance is best understood separately from the longer, better-recorded history of the cheeseburger itself.

The cheeseburger developed from the hamburger, which became increasingly popular in the United States during the late 19th and early 20th centuries. Several people and restaurants have claimed credit for adding cheese to a hamburger, but no single account is universally accepted. One frequently cited early example comes from Pasadena, California, where Lionel Sternberger was reported to have served a “cheese hamburger” at his father’s sandwich stand in the 1920s. By the 1930s and 1940s, cheeseburgers were appearing more regularly on restaurant menus, helping establish the combination as a recognizable variation of the hamburger.

Over time, the cheeseburger evolved alongside American restaurant culture. Diners, roadside stands, drive-ins, and later fast-food chains made it inexpensive and convenient, while regional restaurants adapted it with different cheeses, sauces, breads, and toppings. The dish also became more varied: cheddar, American, Swiss, blue, pepper jack, and other cheeses are now common, and menus may feature everything from a simple single patty to elaborate specialty versions. This flexibility helped the cheeseburger move from a straightforward working-class meal to a staple of both fast food and gourmet dining.

The cultural significance of National Cheeseburger Day lies in the food’s broad familiarity and adaptability. September 18 provides restaurants and food businesses with an opportunity to promote cheeseburger specials, while individuals often mark the occasion by preparing burgers at home or trying regional and creative interpretations. More broadly, the observance reflects the way food holidays use familiar dishes to celebrate culinary history, restaurant traditions, and shared popular culture. Although the day’s precise beginnings remain unclear, its continuing recognition on September 18 mirrors the cheeseburger’s enduring place in American food life.