This year the tree came down in the middle of Christmas day because we needed to leave abruptly and thought we might be gone all weekend. We wanted the cats to be able to have the run of the house while we were gone. The stockings didn't come down until this week, though. All that said, we just hauled the tree out to the garage, ornaments and all. We're waiting for the temperature to warm up (it was a balmy 18 degrees Farenheit here today and the garage is not insulated) before we venture out to the garage to take care of it all.
In the past, though, we've left them up until January or whenever we had the time to take them down.