City Offices Closed – Labor Day SepSeptember 7 2020 All day Share Facebook Twitter Email Sonoma City Offices will be closed Monday, September 7, 2020, in observance of Labor Day. More upcoming events Saturday Harvest Markets at Sonoma Garden Park August 30, 2025 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 All events ยป