New Year’s Holiday JanJanuary 2 2018 All day Share Facebook Twitter Email City Hall will be closed on January 1 and 2. More upcoming events Sonoma Sundays in the Plaza with Music In Place August 31, 2025 City Office Closed – Labor Day September 1, 2025 Tuesday Night Market September 2, 2025 Sonoma Art Walk – First Thursdays September 4, 2025 Ladies of Broadway presented by Broadway Under the Stars September 4, 2025 All events ยป