Last Day/Early Dismissal – Kingsport City/Sullivan County Post author By Vic Hasler Post date December 18, 2026 When 12/18/2026 12:00 am - 12:00 pm 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 ← Administrative Day – No School – Sullivan County → Court of Honor