I’ve been observing the Day of the Dead in one way or another for many years, because I believe it is important to acknowledge the presence of death in life, and to remember my dead family, friends and pets in a more direct way than the usual way of carrying loss around quietly within my own heart.
Also, I live in Los Angeles, which used to belong to Mexico, and still does in many ways. Halloween is big here, and Día de Muertos (more often called Día de los Muertos, at least up here in the north, but I believe Día de Muertos is correct–although it may be one of those cases where the incorrect swallows the correct via common usage) reigns alongside of Halloween, extending the celebration over the course of three days.
The Mexican celebration of the dead goes back to the Aztecs, at least, and during the colonial era was grafted onto the Catholic three day festival, or triduum, of Allhallowstide: All Hallow’s Eve (aka Halloween), All Saints Day and All Souls Day. Care of grave sites and genteel remembrance of the dead is practiced during this period in Catholic communities worldwide, but this more pagan, colorful celebration of the dead is distinctly Central and Southern Mexican– yet it is spreading through Anglo culture, especially in the southwest, and I believe it will spread more widely still, rather as the American version of Halloween has spread across the globe.
I believe the Day of the Dead is taking hold because, as I said above, we need a time to remember our dead as individuals, families and communities–and be reminded of the eventuality of our own deaths. In our death denying culture, such thoughts have been considered morbid, even unhealthy, for a long time–but that is changing.