Halloween is a holiday celebrated on the night of October 31. The word Halloween is a shortening of All Hallows' Evening also known as Hallowe'en or All Hallows' Eve.
Traditional activities include trick-or-treating, bonfires, costume parties, visiting "haunted houses" and carving jack-o-lanterns. Irish and Scottish immigrants carried versions of the tradition to North America in the nineteenth century. Other western countries embraced the holiday in the late twentieth century including Ireland, the United States, Canada, Puerto Rico and the United Kingdom as well as of Australia and New Zealand.
Halloween has its origins in the ancient Celtic festival known as Samhain (pronounced "sah-win"). The festival of Samhain is a celebration of the end of the harvest season in Gaelic culture.