Day of the Dead in Mexico (November 1 and 2) is one of the most moving, culturally significant, and visually impressive events of the year. As opposed to the United States, where death is usually a hidden, private affair, in Mexico the entire country engages in a communal exercise of observing and remembering those who have died. It is a defining element of the culture, an expression of a world view that is distinctly Mexican. It is also one of the best times to visit, observe, and learn.
Places such as Oaxaca and Patzcuaro are famed for their Day of the Dead celebrations, but in Mexico City you will perhaps find even more going on. For those interested, here is the link to the article I wrote last year for The News. Most of the information therein will apply this year, too.