The Christmas tree at Rockefeller Center is typically taken down a few weeks after New Year's Day. The exact date varies each year, but it is usually sometime between late January and early February. The tree is typically up for a total of about six weeks, starting in mid-November and ending in late January or early February. The tree is taken down because it's a large structure that requires a lot of maintenance and upkeep, and it also takes up a lot of space in a busy area of the city.