Thursday, Sept. 18, is National Cheeseburger Day. Here's the best deals, from freebies to BOGOs, at McDonald's, Burger King, Wendy's and more.

On Thursday, Sept. 18, the American classic will get the credit it deserves on National Cheeseburger Day. In honor of the foodie holiday, a plethora of restaurants are firing up the grill with free ...