 Also this weekend, some sweet treat deals. Ice cream, you scream for National Ice Cream Day deals this weekend. Several major frozen treat chains, including Carvel, Dairy Queen, and Dippin' Dots, are offering promotions all weekend long for customers. Some deals are only available through the company's apps. Cold Stone Creamery has released limited-time ice cream floats and a fudge sundae to celebrate. National Ice Cream Day is Sunday, July 21st.