Scholars trace the origins of the modern Mexican holiday to indigenous observances dating back hundreds of years and to an Aztec festival dedicated to the goddess Mictecacihuatl. The holiday has spread throughout the world, being absorbed within other deep traditions for honoring the dead. It happens to be a holiday that has become a national symbol and as such is taught (for educational purposes) in the nation's schools, but there are families who are more inclined to celebrate a traditional "All Saints Day" associated with the Catholic Church.