The tradition of keeping a Christmas tree up for a specific amount of time varies depending on different cultures and beliefs. Some people choose to take their tree down right after Christmas, while others may keep it up until the new year, or even longer. In some countries, it's common to keep a Christmas tree up until January 6th, also known as the Epiphany. Ultimately, the decision of when to take down the tree is a personal one, and there is no right or wrong answer.