■ Music: Electronic Music Exchange Concert
Performers of electronic music from various California colleges converge on Stanford University tomorrow (April 21) at 8 p.m. for a free concert. The event is on the CCRMA stage on the third floor, 660 Lomita Drive. Go to ccrma.stanford.edu.
■ Film: Greenlight Earth Day Film Festival
Local filmmakers will show their environmentally themed films tomorrow (April 21) at the annual Greenlight Earth Day Film Festival at 7 p.m. The event is in the Cubberley Theatre, 4000 Middlefield Road, Palo Alto. The festival has an emphasis on student-produced films. Go to cityofpaloalto.org.