Halloween is a tradition celebrated on the night of October 31, most notably by children dressing in costumes and going door-to-door collecting sweets. It is celebrated in parts of the Western world, though most commonly in the United States, Canada, the UK, Ireland, Puerto Rico, and with increasing popularity in Australia and New Zealand. Halloween originated among the Celts in Ireland, Britain and France as the Pagan Celtic harvest festival, Samhain. Irish, Scots, Calan Gaeaf in Welsh and other immigrants brought versions of the traditions to North America in the 19th century. Most other Western countries have embraced Halloween as a part of American pop culture in the late 20th century.
The term Halloween, and its older spelling Hallowe'en, is shortened from All-hallow-even, as it is the evening before \”All Hallows' Day\”” (also known as \””All Saints' Day\””). In Ireland