When to take down a Christmas tree can vary depending on personal preferences and cultural practices. Some people choose to take down their tree after the holiday season, such as on New Year's Day or shortly thereafter. Others may wait until the Christmas decorations are no longer needed for their seasonal aesthetic, such as when the holiday season ends and the focus shifts to other occasions or events. Ultimately, the timing of when to take down a Christmas tree is a personal decision and can be based on convenience, tradition, or other factors.