Halloween Origin

Halloween comes from the term of  "All Hallows Eve" which occurred on October 31st, the end of summer in Ireland and Scotland. "All Saints Day" or "All Hallows Day" was the next day of November 1st. The  headers at this time of year moved their animals into pens and barns to pass the winter. Which spirits roamed around at this time. People dressed in costumes and paraded in villages to scare the spirits.
Later on this dates were named as "All Saints Day by the Catholic Church.