Official holidays fall into three categories: Catholic religious holidays, national holidays celebrating historical events and civic holidays honoring a particular town or village. Of course, in Mexico there are also those fiestas held just to celebrate nothing in particular. Almost all celebrations have plenty of food, drink and music. Attending any one of these events is a nice introduction to the culture. Book your hotel well in advance for more popular holidays such as Semana Santa (Easter Week) or for famous events such as the spring equinox at Chichen-Itza.