About a week ago or so, the NFL announced that it would be recognizing Juneteenth, on June 19, as a league holiday. June 19, 1865 (not 1985) marks the day that the final slaves in Texas were read the words of Abraham Lincoln contained in general order no. 3, which ordered the freeing of slaves, which came months after the official end of the Civil War.
Juneteenth celebrations go back to as early as 1866 to mark the one-year anniversary of this event, but it has not been substantially formally recognized on a national level.