It’s National Cheeseburger Day!By BROOKLYN LOWERY (Patch Staff) It only comes once a year, so hopefully you skipped breakfast and plan to celebrate.Sept. 18 is National Cheeseburger Day; get out there and enjoy. (Not that you need an excuse for a great burger on a Friday).According to Wikipedia, some genius decided to begin adding cheese to burgers in the 1920s or 30s, though there is debate as to who did it first.More from...