Music, dancing, vendor booths. Food & drinks available for purchase. $60–$169. Ages 12 & younger: free with a paying adult. Ages 13–17 can purchase $25 tickets at the door. Benefits the music program in Petaluma schools. COVID-19 guidelines followed. 11:30 a.m.–9:30 p.m. Sonoma–Marin Fairgrounds. 175 Fairgrounds Dr., Petaluma. petalumamusicfestival.org.