Hii man !Halloween is the modern name of an ancient Celtic holiday "Samhain". People celebrate this day as a spiritual beginning of a new year. The various activities done in Halloween are mostly associated with the idea to obtain good fortune.
Ancient people believed that ghosts came back to earth on this day. It is said that on this day, the spirits of the dead come back to earth in search of living bodies to possess for the next year and try to return to the homes where they were living. So to appease these spirits, people offer them fruits and nuts. If the spirits are not pleased, it is feared that the spirits would kill the people or destroy their property. So dont fear . Thank u