According to History.com, "Halloween, celebrated each year on October 31, is a mix of ancient Celtic practices, Catholic and Roman religious rituals and European folk traditions that blended together over time to create the holiday we know today. Straddling the line between fall and winter, plenty and paucity and life and death, Halloween is a time of celebration and superstition. Halloween has long been thought of as a day when the dead can return to the earth, and ancient Celts would light bonfires and wear costumes to ward off these roaming ghosts. The Celtic holiday of Samhain, the Catholic Hallowmas period of All Saints' Day and All Souls' Day and the Roman festival of Feralia all influenced the modern holiday of Halloween. In the 19th century, Halloween began to lose its religious connotation, becoming a more secular community-based children's holiday. Although the superstitions and beliefs surrounding Halloween may have evolved over the years, as the days grow shorter and the nights get colder, people can still look forward to parades, costumes and sweet treats to usher in the winter season."
Trick or Treating is also a tradition of Halloween with early starts. Trick or Treating came from All Soul's Day parades in early England. The poor citizens of England would line up on the sides of the street as the richer members of the community paraded by and threw them pastries called soul cakes. The starving citizens would accept these cakes in exchange for praying for the richer class's dead family member.
Another tradition of Halloween is Dressing up costumes. This is another tradition that started in early England where citizens, knowing that Hallows Eve was a time for spirits of their ancestors to come back and taunt them, would dress up in masks and costumes to keep the spirits of their ancestors to come back and taunt them, would dress up in masks and costumes to keep the spirits from recognizing them.