What do you know about halloween?

Halloween is an observance 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 much of the Western world, though most common in Canada, the United States, Puerto Rico, Ireland, the United Kingdom, and with increasing popularity in Australia and New Zealand. Halloween originated among the Celts in Ireland, Britain and France as a pagan Celtic harvest festival. Irish, Scots and other immigrants brought versions of the tradition 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