Who How When Where and why did Halloween get started?

Answer 1

Halloween was started in the 3rd Century CE, with the pagan Gaelic festival of Samhain. Samhain gave thanks for a good harvest, mourned the dead lost in the previous year, and sacrificed animals.

Answer 2

Halloween was started in Ireland

then when its was Halloween they thought that the ghost haunted there crops so the putted food outside so the ghost would lift up there sprits they celebrated with costumes and masks.