You still do not know.
The date of Lincoln's Proclamation of Emancipation has nothing to with Juneteenth.
Yeah, I was so informed by Freeper “a fool in paradise.” So, now I know.
Which, is in agreement with my contention that the details weren’t well-known until they were recently promoted.
The Proclamation of Emancipation did not free all the slaves. The slaves in the Union States were not freed until the 13th Amendment was ratified.