Dia de los Muertos, or Day of the Dead, is a Mexican holiday celebrated November 1-2 that honors and remembers loved ones who have died. It has indigenous roots but was influenced by Catholic traditions. Families build home altars and visit cemeteries to remember deceased family and friends with food, decorations, candles, and other offerings. Common symbols include calaveras (sugar skulls), papel picado (cut paper designs), and calacas (skeleton figures). The holiday is meant to celebrate and commune with the dead, not mourn them.