I will start after Thanksgiving, and things usually stay up until after New Years. It depends on whether DS and DIL stay in town, or head to her parents. That depends on when Christmas falls, and how much time they have off work. If they go, NY eve and New years day "substitute". After having worked retail management for 20 years, where I never had time to decorate, and was lucky to get a tree up, I don't mind doing it early and leaving it up!