You might try a search in ANNIE, and it would get you a quick answer:

 You searched for the KEYWORD: tepoztlan            W&L CATALOG
 4 entries found, entries 1-4 are:                      LOCATIONS
     1  Anthropological essays                          LEYBURN
     2  Life in a Mexican village: Tepostlan restudied; LEYBURN
     3  Tepoztlan, a Mexican village; a study of folk l LEYBURN
     4  Tepoztlan, village in Mexico                    LEYBURN

Nov 1. All Saints' Day (Adults): Day in commemoration of the adult dead. Food is offered for the dead. the mother of the house says a prayer with the offering. A typical utterance is, "For thee, my son Juan, who has left us here so sad, here we leave thee thy food so that thee will not suffer hunger and so that thee will not forget to aid us in our misery." In this way an offering is made for each dead member of the family. The families then go to place flowers on the graves. "The usual offerings consist of tamales, rice, chicken, chocolate, mole verde, mamones, and fruits... All night people keep awake. They pray and call out the names of the dead. There are torches alight in the streets. The bells on the chapels strike the hours with double strikes. At four o'clock a group of men from each barrio go about asking food for the bell-ringers. People give a tamale and a dish of mole. At six in the morning the blessing is given, Mass is said, and the offering is eaten." (1951:462)

If you'd like more background, take a look at a guide to Morelos.