For anyone who's not familiar with the festival he's a bit of back knowledge...
Day of the Dead (Spanish: Día de Muertos) is a Mexican holiday celebrated throughout Mexico and around the world in other cultures. The holiday focuses on gatherings of family and friends to pray for and remember friends and family members who have died. It is particularly celebrated in Mexico, where it is a national holiday, and all banks are closed. The celebration takes place on November 1 and 2, in connection with the Catholic holidays of All Saints' Day and All Souls' Day. Traditions connected with the holiday include building private altars honoring the deceased using sugar skulls, marigolds, and the favorite foods and beverages of the departed and visiting graves with these as gifts. They also leave possessions of the deceased.
Scholars trace the origins of the modern Mexican holiday to indigenous observances dating back hundreds of years and to an Aztec festival dedicated to the goddess Mictecacihuatl. The holiday has spread throughout the world: In Brazil, Dia de Finados is a public holiday that many Brazilians celebrate by visiting cemeteries and churches. In Spain, there are festivals and parades, and, at the end of the day, people gather at cemeteries and pray for their dead loved ones. Similar observances occur elsewhere in Europe, and similarly themed celebrations appear in manyAsian and African cultures.
In some parts of the country (especially the cities, where in recent years other customs have been displaced), children in costumes roam the streets, knocking on people's doors for a calaverita, a small gift of candies or money; they also ask passersby for it. This relatively recent custom is similar to that of Halloween's trick-or-treating.
Some people believe possessing Day of the Dead items can bring good luck. Many people get tattoos or have dolls of the dead to carry with them. They also clean their houses and prepare the favorite dishes of their deceased loved ones to place upon their altar or ofrenda.