Do you take your Christmas tree down before New Years day or after?

United States
November 27, 2008 5:34am CST
When do you take your Christmas Tree down? After New Years or before New Years. I have heard that it is bad luck both ways so I am confused. Is it bad luck to take the tree down before New Years Day or after New Years Day? I know it is just an old superstition. Does anybody know where the superstition came from and why?