Fire up the grill, or take it easy and find a local burger joint. It's National Cheeseburger Day.

September 18 is when we pay tribute to what is possibly the greatest hot sandwich ever assembled.

The first cheeseburgers started popping up on menus in the 1920s, and it has been a love affair ever since.

So, how do we celebrate National Cheeseburger Day? Here are some options:

Sonic is offering a cheeseburger and medium onion rings for just $2.99 today.

Burger King is offering two whoppers for just $6.

McDonalds is not offering a deal specifically for cheeseburger day, but they are offering a free burger with purchase of another burger through the restaurant’s app.

For Monday only, patrons at Applebee's can get a cheeseburger with classic fries for $6.99.

BurgerFi is offering a deal for a $5 cheeseburger all day Monday. Just mention the cheeseburger day deal when you are ordering.

USA TODAY contributed to this report.