The tradition of Halloween was carried to America by the immigrating Europeans. These days Halloween is not usually considered a religious holiday. It is primarily a fun day for children. Children dress up in costumes like people did a thousand years ago. But instead of worrying about evil spirits, they go from house to house. They knock on doors and say "trick or treat." The owner of each house gives candy or something special to each trick or treater.
Although I am not a girl I also take advantage of "ask for sweets" and I dressed as a little witch ...
And... Happy last Halloween ♥