Truth about Trees

Dumb debate, but one I am curious about. The women in my office are arguing about when is the best time to take your Christmas Tree down. I said maybe like a day or two after New Year's, but was told I was a dumb man *grunt* and knew nothing of the holiday etiquite needed in such a debate. Clearly I was told, trees come down the day after Christmas (or various days near there) but never after New Year's or else it looks tacky. What say the masses?