This Friday, December 3, the National Zoo kicks off its annual Zoo Lights, which fills the Zoo’s exhibits with holiday lights and decorations. As a holiday gift to the city, admission to the event is free (although parking is $8 for FONZ members and $15 for nonmembers). The lights come on between 6:30 and 8:30 p.m., Friday through Sunday until December 12, and daily from December 17-January 1 (except December 24, 25, and 31).