Cheeseburger Day is celebrated yearly on September 18th. Since the early Roaring Twenties, this annual celebration of one of the most famous and delectable meals in the United States has taken place. While its simple cousin, the hamburger, was most likely developed about 1900 in the United States, it is thought that adding cheese on top didn't come into play until 1924.
Lionel Sternberger, a teenager working at his father's sandwich shop, The Rite Spot in Pasadena, California, USA, one day decided to place a piece of American cheese on a burger. He thought it was delicious, so he told his father, who agreed. The cheeseburger was developed as a result of this.
Although the concept was supposed to have originated in California in 1924, the first real sandwich to be offered under the term "cheeseburger" appeared in 1934 at Kaelin's restaurant in Louisville, Kentucky, USA. However, the name "cheeseburger" was trademarked the next year, in 1935, at the Humpty Dumpty Drive-in in Denver, Colorado.
Cheeseburger Day is observed in a variety of ways, but it may be observed and celebrated in nearly any way a person desires–as long as it contains a cheeseburger.