Halloween is celebrated on October 31, every year. It marks the day before the Western Christian feast of All Saints, or All Hallows, and initiates the season of Allhallowtide.
Celebration of Halloween is largely non-religious in most parts of Europe and North America.
Halloween seems to have developed mostly from Christian feasts of the dead from later in the Middle Ages, including All Saints’ Day on November 1 and All Souls’ Day on November 2.
By the 9th century, October 31 was being celebrated as All Hallows’ Eve, later contracted to Halloween, throughout Western Christendom.
Pranks, parties, costumes, and trick-or-treating mark Halloween celebration.
Halloween became popular in the United States in the 19th century as European immigrants brought Halloween customs with them. By the 20th century, Halloween became one of the principal holidays in the United States.
Associated with evil spirits and the supernatural, it is celebrated by children in costume who gather candy by ringing doorbells and calling out “trick or treat,” “trick” referring to the pranks and vandalism that are also part of the Halloween tradition.