Is a holiday traditionally celebrated on November 1 and 2, though other days,
such as October 31 or November 6, may be included depending on the locality.
It is widely observed in Mexico, where it largely developed, and is also observed
in other places, especially by people of Mexican heritage. The observance falls
during the Christian period of Allhallowtide. Some argue that there are Indigenous
Mexican or ancient Aztec influences that account for the custom, and it has become
a way to remember those forebears of Mexican culture.
In 2008, the tradition was inscribed in the Representative List of the Intangible
Cultural Heritage of Humanity by UNESCO.
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