Even Republican Senators are trying to replace Columbus Day with Juneteenth which almost no one even knew was a thing a month ago.
I've known it was a thing for awhile. Its quite big here in Texas, not surprisingly (Galveston proclamation etc). Nobody should be shocked or dismayed that non-black folks are unaware of it, its only recently that there has been any mention of it in print or on air.
In a way, the fact that a lot of white/Latino/Asian/whatever people weren't aware of it is not an indictment of them, it is an indictment of the self-segregation* of American blacks.
* They make a kinda big deal of the whole "invited to the barbecue" thing. 1st time I was invited to the barbecue, several of the older folks talked to me nonstop, like I was some exotic furriner. Which I was, being a native Californian.
We too,we have always known about Juneteenth here in Texas.