It’s Krispy Kreme’s 79th birthday, so that means doughnuts. Celebrate with them by buying a dozen doughnuts at any Krispy Kreme outlet and get another dozen of their original glazed doughnuts for free. Customers are limited to purchasing up to three dozens per person. Krispy Kreme will also reward those who participate in the Day of the Dozens with a mobile voucher for half a dozen original glazed doughnuts (free with any dozen doughnuts purchased). The mobile voucher will be available via the SweetSpot mobile app; receipt as proof of purchase of the Day of the Dozens offer is required.