Dunkin' Donuts DFW Celebrates Nat'l Donut Day on Fri June 2, 2017! Various locations. Free donut with any beverage purchase. DUNKIN' DONUTS CELEBRATES NATIONAL DONUT DAY WITH FREE DONUTS and DELIVERY of 60 DOZEN DONUTS TO DALLAS POLICE DEPARTMENT Dunkin' Donuts' sweet celebration June 2 offers guests in Dallas- Fort Worth a free donut of their choice with the purchase of any beverage WHAT: National Donut Day is Friday, June 2, 2017 and Dunkin' Donuts is ringing in the day in a most delicious, delightful and delectable way, offering guests in the Dallas – Fort Worth area a free donut of their choice (while supplies last) with the purchase of any beverage. The offer is good all day on June 2 at participating Dunkin' Donuts restaurants nationwide. To make the day even sweeter, at 10:00 a.m. on Friday, June 2, Dunkin' will deliver 60 dozen donuts to the Dallas Police Department headquarters at 1400 S. Lamar St., Dallas.