In honor of National Cheeseburger Day this past Monday, September 18, we had a couple of, you guessed it, cheeseburgers (and fries). While the origins of National Cheeseburger Day are unclear, we nevertheless were excited to celebrate this special day by getting some cheeseburgers from Shake Shack, one of our favorite places. The origins of the cheeseburger itself are also unclear, with one story saying that Lionel Sternberger invented it in 1926 while working at his father’s Pasadena, California sandwich shop, The Rite Spot, when he dropped a slice of American cheese on a sizzling hamburger. O'Dell's, a Los Angeles restaurant, and Kaelin's, a Kentucky restaurant, also make a claim for its invention. Whatever the origin, cheeseburger, we honor you!