In 2021, June 19 became a federal holiday as President Biden formally acknowledged Juneteenth in the Juneteenth National Independence Day Act. This day has been celebrated by the Black community since the 1800s--why did it take so long to become a national holiday? And what exactly does it celebrate? Readers learn the history of Juneteenth, from its connection to the Emancipation Proclamation to modern observances, including an activity they can do...