Historical note on Juneteenth: The actual date slavery was legally abolished in the United States was December 2, 1865, when the Thirteenth Amendment was ratified by enough states. Kentucky (at least) had slavery right up to that date. But I grant the issuing of an order by a military official in the last Confederate state is more dramatic than a state legislature's vote.
Liberdon is a Mastodon instance for libertarians, ancaps, anarchists, voluntaryists, agorists, etc to sound off without fear of reprisal from jack or zuck. It was created in the wake of the Great Twitter Cullings of 2018, when a number of prominent libertarian accounts were suspended or banned.