In the East and Asia, Catholics and Christians remove their Christmas Tree and Lights on the day after Epiphany. By this time most Christmas Trees have begun to wither anyway. But in most American households we see the lights off and the trees all cut-up within a day or two after Christmas.
When I was a child (back in the days of the dinosaur ;-), the Christmas tree did not go up until Christmas Eve, because that is when Christmas began and came down the day after Epiphany because that is when Christmas ended. And, yes, that was right here in the U S of A. In the 1947 film The Bishop's Wife, again you see the tree being decorated on Christmas Eve. This tradition began to change with the growth of marketing, as advertisers began promoting Christmas earlier and earlier. We put up our tree (a real one) on December 13th and it is still fresh and beautiful. I intend to enjoy it for another week. It will come down on MLK weekend.