What better way to celebrate the holiday season than a traditional tree lighting? Join Mayor Joseph P. Riley along with special guest Santa Claus as they kick off December with the illumination of the official Charleston Christmas tree in Marion Square. Gaze at the spectacular 60-foot Tree of Lights while enjoying the Charleston Community Band with friends and family. Marion Square, corner of Calhoun & King sts. Saturday, 4:30-6pm. Free. (843)724-7305, www.charlestonarts.org