So the photo info states that this is prior to 1896 (maybe that is when the Union Hotel burned down or when the added floors to the Jacoby Storehouse ?) and according to Kevin’s book, the Plaza wasn’t wired for electricity until April of 1895.
Plus notice the stars and stripes on the horses… Oh, and flags. Lots of flags.
That leads me to believe this might be July 4, 1895… Other thoughts?