The holiday focuses on gatherings of family and friends to pray for and remember friends and family members who have died. The celebration occurs on the 2nd of November in connection with the Catholic holiday of All Saints' Day and All Souls' Day which take place on those days. Traditions 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. Scholars trace the origins of the modern holiday to indigenous observances dating back thousands of years, and to an Aztec festival dedicated to a goddess called Mictecacihuatl.