It is a common tradition to put up a Christmas tree around the holiday season, typically around the beginning of December. However, some families may put up their tree earlier or later, depending on their personal preferences and schedules. The timing of when to put up the Christmas tree can vary depending on a variety of factors, such as cultural traditions, family customs, or personal preferences. Some families may put up their tree on Thanksgiving or Christmas Eve, while others may put it up as early as November.