What is Juneteenth? – Woos Hole Diversity
From Woods Hole Diversity Advisory Committee: Juneteenth is often cited as African-American Independence Day, a special day of recognition by many municipalities and states. The observances commemorate June 19, 1865, the day the Emancipation Proclamation was finally enforced in Texas, the last of the seceding states to be occupied by the federal army. At the time, an estimated 250,000 persons were still enslaved in Texas, despite the signing of the proclamation more than two years earlier.
More information here.