The Earliest Known Maya Calendar
But the most striking discovery of all was made on the structure's east wall, where Saturno and his team uncovered neatly ordered columns of carefully rendered hieroglyphic texts and numerals.

There's just enough preserved here for us to figure out the differences in time between the different columns, and they seem to be very standard. The interval between each of these columns was either 178 days or 177 days, and those numbers are really important in the lunar timekeeping of the ancient Maya. It seems pretty clear here that we have a lunar calendar.

"Baktun 14, Baktun 15, Baktun 16 were all going to be coming," said Stuart. "The Maya calendar is going to keep going, and keep going for billions, trillions, octillions of years into the future. A huge number that we can't even wrap our heads around."
Saturno echoed Stuart's sentiments.
"The ancient Maya predicted the world would continue, that 7,000 years from now, things would be exactly like this."
"We keep looking for endings. The Maya were looking for a guarantee that nothing would change. It's an entirely different mindset."
The researcher's findings are published in today's issue of Science. The findings will also be presented in next month's issue of National Geographic.