The U.S. Marine Band provides the music as the audience and a 400-strong choir give voice to Christmas carols and Hanukkah songs. Traditions include a candlelight procession during "Silent Night" and a "jing-a-long" during "Jingle Bells." (BYO candles and bells.) Parking is limited, so arrive as close to the 3 p.m. opening as you can. The event benefits Toys for Tots, so participants are asked (but not required) to bring a new, unwrapped toy to donate.