At participating Dairy Queen locations this December all ice-cream cakes are half priced.
This is definitely a your mileage may vary type of deal and not all locations will be participating. As we get closer to December, I’d recommend phoning your local Dairy Queen to confirm if they will have the deal or not. It may still be too early for some locations to have that information.
So far only the Broadview location in Toronto has been confirmed for having the promotion. If the past is any indicator, people in Ontario will have the best luck finding a location that is participating.