A traditional rule in the Catholic Church is that the Christmas tree should be taken down before the feast of the Baptism of the Lord, which is celebrated on January 13th. This is to help us focus on the important events that come after the birth of Jesus Christ, including his baptism and the coming of the Holy Spirit. Additionally, it is also suggested that the tree should be taken down before the feast of the Epiphany, which is celebrated on January 6th. This is to remind us of the three wise men who visited Jesus at his birth, and to celebrate their recognition of him as the Son of God.