Isn't everyday National Cheeseburger Day?

Apparently, not! Today (Sept. 18) is the national "holiday."

If you're going to chowdown on this high-cholesterol treat, you can also do some good by while you're at it.

Foursquare and KRAFT Cheese have teamed up to make it easy to give back. Checking-in at Five Guys Burger and Fries means KRAFT will donate the equivalent of a meal to Feeding America, an organization that operates food banks across the United States. The event started on Sept. 17 and will last for a total of two weeks.

Make your check-ins count by going to kraftcheese.com/checkin and connect your foursquare account.

But why is there a National Cheesburger Day? With burger joints on nearly every corner, they are hard to escape. Americans like them with blue cheese, swish cheese, goat cheese and American cheese, just to name a few.

In fact, according to Patch.com, the largest cheeseburger ever made was created in the state of California at the Alameda County Fair. The 777-pound burger included 50 pounds of cheese while the bun alone weighed 272 pounds. In total, the burger was 1.375 million calories!

Jimmy Buffett loved cheeseburgers so much, he wrote a song about them. "Cheeseburger in Paradise" was inspired by a boat trip Buffett took. Buffet was so sick of consuming the only snacks available on the ship -- canned food and peanut butter -- and he constantly found himself fantasizing about biting into a juicy cheesburger. When the boat finally came to shore on the island of Tortola, Buffett was able to dig into a cheeseburger.

If you're a Buffet fan, you can celebrate National Cheesburger Day at the restaurant chain, Cheeseburger in Paradise.