The Day of the Dead falls on November 1 and 2 of each year, coinciding with the Catholic holidays All Saints’ Day and All Souls’ Day.
Although November 2nd is the official date for Day of the Dead, it is celebrated between October 31st and November 2nd. Usually the preparations (and some festivities) start even earlier than that. So really, the “Day” of the Dead can also be called the “Days” of the Dead, because the holiday spans more than one day.
Traditionally, November 1 is the day for honoring dead children and infants, and November 2 is the day for honoring deceased adults.