Various Dairy Queen locations are participating in Fan Appreciation day again this year. Happening on Wednesday, January 22nd or Saturday, January 25th, depending on location.
See link for full listing of participating locations: https://www.dairyqueen.com/us-en/...ation-Day/
This list also designates if everything is 1/2 off the normal prices or if it's just the Cakes and Treats. Of course, that separation could just be the places that serve food as well vs those that just have desserts.