National Coffee Day is tomorrow ? Thursday September 29,2016. Dunkin? Donuts, Coco and the Director and Krispy Kreme are offering deals to Charlotte coffee lovers.  (1) Dunkin? Donuts All Dunkin? Donut Charlotte locations will offer a medium coffee for $.66 in honor of the brand?s 66-year history. Fun fact: Dunkin? Donuts sells more than 1.9 billion cups of ?