If you have to explain the origins of a holiday to the average person, it probably shouldn’t be one. So it is with Juneteenth.
If the point is to celebrate the end of the Civil War, it would make sense to turn the day of Lee’s surrender into a holiday. If the objective is to commemorate the end of slavery, pick the date the Emancipation Proclamation was issued, or the ratification date for the Thirteenth Amendment. If you think we need a second day (in addition to MLK Day) to talk about equal rights and racism, the logical day to celebrate is the date the Fourteenth Amendment was ratified. I could support any of those. But the practical significance of Juneteenth is close to zero. As a holiday, it belongs in the dustbin of history.