Middlesex County holds its Juneteenth celebration on Saturday, June 26. Juneteenth, which is officially celebrated on June 19, is the oldest known commemoration of the end of slavery in the United States. Last year Gov. Ralph Northam made Juneteenth an official state holiday According to the Southside Sentinel among the activites is a parade beginning at 2:00 p.m. that starts and ends at Middlesex High School.