Halloween originated from the ancient Celtic festival of Samhain and the Christian holiday All Saints' Day. It is traditionally celebrated on October 31st and involves activities like trick-or-treating, wearing costumes, carving jack-o-lanterns, and attending parties. The tradition of Halloween was brought from Ireland to North America by Irish immigrants fleeing the potato famine in the 1840s. Today, Halloween is one of the most popular holidays in the United States and Canada, though some Latin American countries have their own traditions on this date or do not observe it at all. According to legend, Halloween night is when the door between the living world and the afterlife is opened, and spirits of the dead return to visit