The Mayan calendar was a system of calendars and almanacs used by the pre-Columbian Maya civilization in Central America. These calendars are synchronized and closely integrated in complex ways to form broader and longer periods. In 2012, archaeologists in the United States discovered the oldest Mayan sky chart, a record of sky signs and calendars, in a Mayan cultural site in Guatemala. The calendar has lasted for more than 7,000 years, disproving the "2012 end of the world" hypothesis.