FREE. Travel & Leisure & Yahoo News have ranked it as the eighth best Fourth of July celebration in the US. Carnival with games & food & drink on the plaza. Sonoma Plaza. 10 a.m.–5 p.m. Parade starts at 10 a.m. Live music: 12:30–4 p.m. Fireworks at dusk. sonomavolunteerfirefighters.org/fourth-of-july.