smoky pumpkin head with dark background

[hat can stand forHelp authoring toolhistone acetyltransferaseHuman African Trypanosomiasis See also: hat See more at Wikipedia.org...]

>For other uses, see Halloween (disambiguation). Halloween is an observance celebrated on the night of October 31, most notably by children dressing in costumes and going door-to-door collecting candy. It is celebrated in much of the Western world, though most common in the United States, Puerto Rico, Ireland, the United Kingdom, Canada and sometimes in Australia and New Zealand. Irish, Scots and other immigrants brought older 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. See more at Wikipedia.org...