Maya calendrical divination is a subset of traditional beliefs, rituals and divinatory

Divination

Divination is the attempt to gain insight into a question or situation by way of an occultic standardized process or ritual...

 practices that are held or performed among various Maya

Maya peoples

The Maya people constitute a diverse range of the Native American people of southern Mexico and northern Central America. The overarching term "Maya" is a collective designation to include the peoples of the region who share some degree of cultural and linguistic heritage; however, the term...

 communities in Guatemala

Guatemala

Guatemala is a country in Central America bordered by Mexico to the north and west, the Pacific Ocean to the southwest, Belize to the northeast, the Caribbean to the east, and Honduras and El Salvador to the southeast...

 and southern Mexico

Mexico

The United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...

. The first thorough documentation of these practices was by anthropologist Barbara Tedlock after her initiation in Momostenango

Momostenango

Momostenango is a municipality in the Totonicapán department of Guatemala. The municipality is situated in the North-West of Totonicapán, in the Western highlands of Guatemala.-Population:Momostenango's population is predominantly of Maya K'iche' descent...

, Guatemala.
Mayan thought and day-to-day activities were both deeply wrought up with astrology during the height of Mayan civilization.