Halloween is named by two words Hollow and Evening. Every year on 31st October celebrated for Halloween.
People say it is an ancient Celtic festival of Samhain( Samhain is a Gaelic festival showing the end of the harvest season and the starting of winter or the long night of the year) when everyone lights up bonfires and wear weird ghost costumes to deflect the ghosts.
People enjoy moments when they meet. Halloween is the day when everyone wants to become a ghost and gifts each other.
Some people say once upon a time everywhere was the ghost and they were trying to kill human beings. The human being who survived they took a get up of ghost and saved them-self from ghosts. From that day people are celebrating Halloween.