Welcome to Yountville Calendar Events for September, 2026 September 2026 SunMonTueWedThuFriSat303112345678910111213141516171819202122232425262728293012345678910 EventDate V. Sattui's Harvest Ball 10953 9/19/2026 5:00:00 AM 9/19/2026 5:00:00 AM Sep 19 Herold Harvest Celebration 12144 9/26/2026 5:00:00 AM 9/26/2026 5:00:00 AM Sep 26 Moonlight in the Vines Celestial Experience 12158 9/26/2026 5:00:00 AM 9/26/2026 5:00:00 AM Sep 26 Walk to End Alzheimer's - Napa Valley 12181 9/26/2026 5:00:00 AM 9/26/2026 5:00:00 AM Sep 26