Each year in Mexico, and in many Hispanic communities around the United States, people celebrate the Day of the Dead (Dia de los Muertos) between October 31 and November 2. While it may sound a bit macabre, it’s actually a joyful celebration, honoring the memories of those who have died in the past year. Today’s Day of the Dead festivals are a blend of old Aztec tradition merged with modern Catholic beliefs. Author Sheena Morgan says in The Real Halloween that the original, pre-Christian celebration took place in late August, and coincided with the migration of Monarch butterflies. The Aztecs believed that the Monarchs were the souls of the dead,…