Halloween is essentially a Western holiday, which was originally celebrated by the Celts to commemorate the dead. It is one of the oldest celebrations observed by people all over the world. The name “Halloween” comes from “All Hallows’ Eve,which means “eve of All Saints”. The Irish celebrated this night on October 31, the eve of “All Saints”. When the Irish immigrants came to the U.S., they continued to celebrate their traditional Halloween. Now it is a day for fun and parties, getting dressed up in mostly scary costumes, trick-or-treating and decorating pumpkins.