Zedd, 2014.

Zedd performs at the Treasure Island Music Festival on Treasure Island on October 18, 2014 in San Francisco, California. 

Tim Mosenfelder/Getty Images

On New Year's Eve, many of us will dirty our slates as much as possible before wiping them clean on the first day of the new year, and one of the most effective ways of doing that is in Las Vegas; and, perhaps less obviously, San Francisco and Sacramento, Calif. Those cities hosted some of the night's biggest electronic dance music DJs: Zedd took over the recently renovated club XS and Calvin Harris dominated Hakkasan while Flying Lotus and Pretty Lights brought the Burners to the Bill Graham Civic Auditorium and A-Trak enlivened a chill crowd at TBD Fest. There was something for everyone, and a little something extra special for those willing to dole out $500,000 for a VIP Calvin Harris ticket. Check out Billboard's graphic breakdown of the evening's events below.