All Hallow's Eve, the point in the year when the veil between the living and the dead is at it's thinnest point. Have we forgotten it's original intent?

We dress up as characters and go out to a party. We dress our children to go out to make business deals; give me treats or I will pull some tricks upon you! Pumpkins and candy, “scare me to pieces”, bats, vampires, caramel apples, candy corn, and…..cemeteries of the dead?
What have we done to the original intent of the Druids and the Priests concerning this day? All Hallows Day comes after Halloween= Hallows eve, evening before.
Do you know what was to take place on this day?
Make a guess. Have some fun.
No cheating and looking it up…..