0shares Share Tweet Pin Expired Find current deals & events → Dairy Queen celebrates its 78th anniversary and the beginning of spring with Free Cone Day on March 20. On the sweet day, Dairy Queen will serve a FREE small vanilla soft-serve cone with its signature curl on top at participating locations. The promo also serves as a kick-off to Children’s Hosptals Week. Customers can leave a donation for Children’s Miracle Network Hospitals, in exchange for the cool treat. Limit one per customer. (Note: Mall locations are not participating.) Find more restaurant deals and coupons here. This post first appeared on Living on the Cheap.