Celebrate National Coffee Day on September 29 with a medium hot coffee from Dunkin' Donuts for 66 cents.
National Coffee Day is September 29, and Dunkin’ Donuts is celebrating the holiday in Dallas / Fort Worth and throughout the country with a special coffee offer for its loyal guests, honoring the brand’s 66-year history. On National Coffee Day, Dunkin’ Donuts will offer guests a medium cup of its signature hot coffee for the special price of 66 cents. Dunkin’ Donuts’ coffee heritage goes back 66 years, something no other leading restaurant brand can match.