Fourteen bands on three stages. Shop local artisan crafts. $65–$169. Ages 13–17: $25, at the door. Ages 12 and under: free with a paying adult. Benefits the music program in Petaluma public schools. Admission: $65 & $169. 11:30 a.m.–9:30 p.m. Sonoma–Marin Fairgrounds. 100 Fairgrounds Dr., Petaluma. petalumamusicfestival.org.