Holiday Commemorates End of Slavery, Beginning of Full Self-Determination “Juneteenth,” the oldest known celebration marking the end of slavery in America, is observed on June 19. Members of the African-American leadership network Project 21 ask for people everywhere to set aside some time on this … Continue reading Project 21 Release: Juneteenth a Time for Black Celebration; Holiday Commemorates End of Slavery, Beginning of Full Self-Determination – June 2002