The story behind Juneteenth and how it became a federal holiday

People hold a sign in their car during a car parade to mark Juneteenth on June 19, 2021, in Inglewood, Calif. Communities all over the country will be marking Juneteenth, the day that enslaved Black Americans learned they were free. For generations, the end of one of the darkest chapters in U.S. history has been recognized with joy in the form of parades, street festivals, musical performances or cookouts. Yet, the U.S. government was slow to embrace the occasion. (AP Photo/Ringo H.W. Chiu, File)

Americans will soon celebrate Juneteenth, marking the day when the last enslaved people in the United States learned they were free.

For generations, Black Americans have recognized the end of one of the darkest chapters in U.S. history with joy, in the form of parades, street festivals, musical performances or cookouts.

The U.S. government was slow to embrace the occasion — it was only in 2021 that President Joe Biden signed a bill passed by Congress to set aside Juneteenth, or June 19th, as a federal holiday.