All Saints' Day, a holy day of obligation in some areas (a national holiday in many historically Catholic countries), and its related observance: Day of the Innocents, The first day of Day of the Dead or El Dia de los Muertos celebration. (Mexico, Haiti)

The Massacre of the Innocents is a story recounted in the Nativity narrative of the Gospel of Matthew (2:16–18) in which Herod the Great, king of Judea, orders the execution of all male children who are two years old and under in the vicinity of Bethlehem. It is modeled by the story of Pharaoh's attempt to kill the Israelite children in the Book of Exodus, as told in an expanded version that was current in the 1st century. Most scholars find no support for the historicity of Matthew's account of the Massacre of the Innocents.