The timing of when most people put up their Christmas tree can vary depending on personal preference and cultural traditions. In some cultures, the tree is put up on the first Sunday of Advent, which falls between November 27 and December 3, while in others, it is put up on Christmas Eve or the first day of December. Some people choose to put up their tree earlier or later to accommodate their schedules or to extend the holiday season. Ultimately, the decision of when to put up the Christmas tree is a personal one and can be tailored to suit individual preferences and circumstances.