Support is building on the left for the idea of making April 9, the anniversary of Lee's surrender to Grant at Appomattox, a national holiday.
I tend to think we have enough national holidays already, with Lincoln's birthday lumped in to Presidents Day and Martin Luther King Day commemorating the Civil Rights struggle that came after the Civil War. If there is to be a Civil War holiday, make it Juneteenth, celebrating the emancipation rather than the end of the war.
And if the point is public remembrance, better to focus on improved history education in schools rather than adding another day off from school whose point will inevitably be lost.