Juneteenth, the nation's newest federal holiday, is celebrated by Americans on June 19 to commemorate the end of slavery in the United States, with a history dating back to the 1860s.

Juneteenth is the oldest nationally celebrated commemoration of the ending of slavery in the United States. Here's some of its history, and how it came to be a national holiday. President Abraham Lincoln signed the Emancipation Proclamation into law on Jan. 1, 1863, freeing all slaves in the Confederate states — on paper, at least.

President Donald Trump made no statement about the federal holiday that commemorates the end of slavery in the United States, other than saying there were too many like it. Lesser occasions routinely garner official proclamations.