A good read on the history of Juneteenth at https://talkingpointsmemo.com/cafe/hidden-history-of-juneteenth
The New York Times has an in-depth look at https://www.nytimes.com/interactive/2020/06/18/style/juneteenth-celebration.html .
More information from the National Museum of African American History and Culture .
This day should be celebrated as a national holiday. Let your Congressional representatives know!