All of the schools are closed.
Most of the steel mills and manufacturing plants are closed and the employees get a paid holiday for it.
I can't imagine that anyone would be able to guess this unless you were actually from PA. In fact I work in OH, just across the state line and many of them couldn't believe it when I told them.
So are you dying to know?
Today is the First Day of Deer Season
Sort of like this picture but only with Deer instead of Rabbits.
And A Lot like this (but again with Deer):
Don't believe me? Ask anyone who lives in PA.
Does your state have an unofficial "Official Holiday"?