In-Service Day – No School for Sullivan County Post author By Vic Hasler Post date August 7, 2025 When 08/07/2025 All Day Add To Calendar Download ICS Google Calendar iCalendar Office 365 Outlook Live Event Type School Cal Online bookings are not available for this event. Back to Annual Calendar ← First Day of School – Kingsport City/Sullivan County → Parent-Teacher Conferences – Kingsport City