This isn’t what Juneteenth means, certainly on a national level.
Ask Joe Biden why Delaware kept their slaves until December 1865.
Slavery ended on April 14, 1865, when Lee surrendered to Grant at Appomattox. However, the North cut the South's access to the Internet, and the message did not reach Texas until June 19th, 1865.
You would not believe the quizzical looks I get from people...lol. My 10YO grandson nailed it: "Opa, there was no internet back then."
I seem to remember him talking about that, in an almost boastful tone.