Breaking news: This is a day dedicated to the broiled hamburger patty topped with cheese. Flags should be at half mast on this day, or at least a moment of silence taken before you chomp into the cheeseburger you are about to consume in honor of the day.

Several restaurants in the 1920s and 1930s claim to have invented the cheeseburger, but nobody knows for sure. According to Wikipedia, “Lionel Sternberger is reputed to have invented the cheeseburger in 1926 at the age of 16, when he was working as a fry cook at his father's Pasadena, Calif., sandwich shop, "The Rite Spot," and "experimentally dropped a slab of American cheese on a sizzling hamburger."

The evolution of the cheeseburger from that point on has gone from the basic burger-lettuce-tomato-onion on a bun to the weirdest combinations you could think of, including the Burger King charcoal and squid ink black burger and a sweet chili pigeon burger garnished with cheddar cheese infused meal worms made by a London pop-up restaurant in 2013.

Check out our gallery of other favorite burgers from Midcoast restaurants and food trucks submitted by people to the Midcoast Maine Food Files, Midcoast Maine Food Forum and Midcoast Eating & Drinking Society Facebook groups.

(Note: not every burger in the Midcoast is represented in this article; the gallery just represents photos of those burgers that people uploaded.)