If you're suggesting cancelling Juneteenth because it "overlaps" ("" because I don't really agree with that) MLK day, wouldn't you cancel MLK day instead? Emancipation was a little more a step forward than the civil rights movement...
Of course, if you consult the experts on cancelling shit, they'd most likely say that Columbus day might be a better fit in the chopping block, and IF we need to "make room on the calendar" (also bullshit) in order to make voting a legit day off (is it not? If someone who works for me asks for time off to vote, I'm going to ask them if they need a fucking ride to the polls... Come on people...), I kinda gotta go with Columbus being the least relevant current federal holiday...
Just my opinion, mind, but cancelling the new shit because "muh traditions" is fucking dumb... Be better...