Tonalpohualli is comprised of 20 individual lithography plates and monoprint in red created by inking amate paper.
The Tonalpohualli is one of the many ancient calendar systems of Mesoamerica. In the indigenous language of Nahuatl, Tonal is the word for both day, sun, life essence and spirit, and pohualli is the word for count and computation. Therefore, Tonalpohualli can be translated as the Count of Days or Suns as they relate to the spirit and soul of an individual. The calendar is divinatory and comprised of twenty symbols known as day signs. Each sign has specific characteristics and represents a comprehensive worldview based on indigenous science and relationship to the cosmos. Much like other astrology of the world, the Tonalpohualli is a map for determining the destiny of a human being based upon the birthdate, as well as for calculating the cosmic energies and attributes of any period of time.