According to the Discovery Green website, “If you have purchased a ticket to the Ice Rink and are not able to use it due to the fact that it is closed, please bring your ticket to be exchanged for a ticket to the 2012-13 season. Come to the ICE rink entrance 10 am – 5 pm through Sunday.”. I’m guessing this applies to daily deals that you have not been able to redeem since the ice was closed due to warm weather. I have a TravelZoo voucher… so I’ll let you know if they give me a ticket for next year.
Update: I went to exchange my ticket today. The counter was opened as advertised and the manager wrote a note saying my ticket was good for next year on my TravelZoo voucher. It was not super official, and I need to hold on to the paper until next Thanksgiving when they reopen, but they assured me it would work for next year.