Pahko Ceremony
A second important ceremony is the four day pahko ceremony, which celebrates the supernatural patron of each town. Most pahko ceremonies take place from May to early July, with different towns hosting their ceremony on different dates. These ceremonies, based on the War of the Moors and Christians, are directed by the fiesta makers who are responsible for organizing the event and assembling the large amounts of food necessary. The fiesta makers are divided into two groups, one representing the Moors and the other the Christians. Each group hosts separate fiestas in which they compete for superiority. The ritual opposition culminates in a mock battle over a symbolic castle, with the Christians winning.
Pahko Ceremony
Source - http://sirismm.si.edu/naa/24/mexico/00809100.jpg