published a few years ago on The Root and PBS.org.Yes, despite Donald Trump’s typically self-aggrandizing assertion that no one had heard of Juneteenth until he decided to schedule a rally on this date, many Americans, especially Black Americans, have been aware of Juneteenth and have been celebrating it for more than a century. (Due to outcry over the date, Trump moved his rally one day later.) But many of us, no matter our race, could use an introduction to or refresher on the date’s.