There are religious festivals of one kind or another almost all year round somewhere in the Cholula area. Social life within and among the various neighborhoods is organized around these religious events, as well as traditions involving communal labor and commercial patterns. People and entire neighborhood rotate certain religious and ceremonial duties, which are called cargas. Many revolve around neighborhood and other local patron saints. These festivals require much work, money and organization. For example, during major festivals, the church of San Andres is richly decorated in flowers, and there are sand paintings called carpets on the ground in Biblical designs. During the week-long feast of Saint Andrew, there is also folk ballet, musical performances and firework shows at night. The most important festival in any of the neighborhood is that of the patron saint. The night before the church is decorated with lamps and then fireworks are set off to announce the event. The next day, Las Mañanitas is sung to the image, there are a number of Masses and it is possible to receive a "visit" by the image of another saint from another neighborhood. During one of the Masses, the carga is transferred to a new mayordomo or person in charge, which is usually attended by mayordomos from other neighborhoods. After this mass, food is offered to all in attendance.