Countdown is how a big slice of Southern California rings in the new year. Insomniac's New Year's Eve festival takes over the NOS Events Center in San Bernardino on December 31, trading the champagne-and-ballroom version of the holiday for multiple stages, a stacked electronic lineup, and a midnight countdown shared with tens of thousands of people. It's a large-scale production built around a single moment, the drop into January, and it closes out the SoCal festival year the way it began: loud, communal, and unmistakably Insomniac. For regulars, ending the year at Countdown has become its own tradition.