Dairy Queen Free Cone Day: FREE Small Vanilla Ice Cream Cone (March 16) March 11, 2015 By Kelli Leave a Comment This post may contain affiliate links or sponsored content, read our Disclosure Policy. Dairy Queen: FREE Small Vanilla Ice Cream Cone on March 16 On Monday, March 16, head to a participating Dairy Queen for FREE Cone Day to snag a FREE small vanilla ice cream cone! Yum! Limit one freebie per customer. No purchase necessary.