Renowned for their precision, vision, and place in time, Mesoamerican calendars have long been held up as an example of the early advancement of the civilizations of the indigenous people of North, South, and Central America. A new study has found that some of the great Mesoamerican peoples and cultures, the Maya and the Olmecs for example, were using the calendar over 3,000 years ago, around 1100 BC, several centuries earlier than previously thought.

The new study, published in the latest edition of the journal Science Advances , focused on the most famous 260-day cholq’ij (order of the days) calendar, used by these cultures along Mexico’s southern Gulf Coast as early as 3,100 years ago. Star-aligned ceremonial centers were built to keep track on this shorter calendar, with the oldest written evidence of this calendar earlier found on painted plaster mural fragments from a Maya site in Guatemala, between 300 and 200 BC.

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Read more: Ancient Origins