The lighting of the Rockefeller Center Christmas Tree typically takes place in early December, usually on the first Wednesday of the month. The exact date and time can vary from year to year, so it's best to check the official Rockefeller Center website for the most up-to-date information. The event is typically broadcast on television, so you can tune in from home to watch the lighting ceremony and enjoy the beautiful display of lights and decorations. The event is also open to the public, so if you're in New York City around that time, you can head down to Rockefeller Center and experience the magic of the Christmas Tree lighting in person!