Free Coffee At Dunkin Donuts 2024. For healthcare workers needing a boost on monday, dunkin' will offer a free coffee in honor of national. Join dunkin’ rewards to unlock exclusive benefits, starting with a free medium drink with purchase your first two weeks as a member!

Saturday is national cold brew day and dunkin’ rewards members can celebrate with a free medium cold brew with purchase through the dunkin’ mobile app*. If you want to score a free donut or drink another day, you can always join the free dunkin’ rewards program.