Saks Fifth Avenue unveils its annual holiday light show, via a projection mapping spectacular via Iris. Now in its third year, the show, which has won awards, is a 3D spectacle that marks the beginning of the holiday season in New York. In the last couple of years, the story has focused on the Saks Snowflake, but goes beyond that for 2012 with a narrative that includes ice skaters, presents, garlands and a Yeti. The show will run until Jan. 7, every seven minutes from 5 pm to 10 pm. See the 2011 version and the 2010 version.