HERE’S ONE THING we know: Día de los Muertos, or Day of the Dead, is not a Mexican version of Halloween. Though related, the two annual events differ greatly in traditions and tone. Whereas Halloween is a dark night of terror and mischief, Day of the Dead festivities unfold over two days in an explosion of color and life-affirming joy. Sure, the theme is death, but the point is to demonstrate love and respect for deceased family members. In towns and cities throughout Mexico, revelers don funky makeup and costumes, hold parades and parties, sing and dance, and make offerings to lost loved ones.