Millions of LED lights shine throughout the zoo grounds as this grand holiday event glows with a three-story-tall Christmas tree, lakeside music-in-motion shows, 3D light sculptures and new life-size animal lanterns. Live reindeer and a 200-foot-long polar slide add to the fun. 5:30-10:30 p.m. Call for ticket prices. Phoenix Zoo, 455 N. Galvin Pkwy., Phoenix, phoenixzoo.org, 602-286-3800.