Monday and the start of the work week can be dreadful, but Dunkin' has a plan to perk up coffee drinkers with a new promotion called "Free Coffee Mondays." Yup free. Starting Monday, February 1 and every Monday after that, until February 22, Dunkin' Perks members can enjoy a free medium hot coffee with any purchase. This special offer gives Dunkin’s coffee drinkers the chance to start each week with their go-to Dunkin’ brew, or perhaps discover a new favorite with recently introduced Dunkin’ hot coffee options, including Dunkin' Midnight, Dunkin’s darkest roast ever with notes of cocoa, and Explorer Batch, a medium roast featuring dark berry flavors.