On Labor Day, the Dairy Queen Fans can get a free small Blizzard Treat deal, including Pumpkin Pie, by downloading DQs new national mobile app. Also available starting Labor Day, fans can enjoy a $4 Burger & Blizzard limited time only deal, with a choice of a DQ Cheeseburger or KC BBQ Bacon Cheeseburger to pair with their choice of a Mini Blizzard Treat. You can also get a free small DQ Blizzard for just downloading their mobile app and registering right now too.