Oldest Maya Long Count calendar date may reveal how royalty turned time into power

June 9, 2026 report Oldest Maya Long Count calendar date may reveal how royalty turned time into power Paul Arnold Author Lisa Lock Scientific Editor Robert Egan Associate Editor Archaeologists working at the ancient Maya site of El Palmar in Campeche, Mexico, have discovered what may be the earliest known Long Count calendar date in the Maya lowlands. It is carved into a stone monument and is interpreted as Aug. 31, AD 180, in our modern calendar. The finding could reveal insights into how the earliest Maya rulers used time to stake their claim to the throne. The Long Count calendar The Long Count is a continuous linear dating system that the Maya used to record historical events in chronological order. Rulers charted their personal milestones, such as births, marriages and triumphs, in stone, which helped them assert and legitimize their divine authority. The earliest previously discovered Long Count date in the region was AD 292, making this finding more than a century older. The research team, led by Kenichiro Tsukamoto at the University of California, studied three carved stone monuments known as stelae 20, 45 and 46. These are large, upright stone slabs or pillars that the ancient Maya used as public billboards. Deciphering ancient stones However, centuries of weather damage made the soft limestone surfaces difficult to read. By combining photogrammetry and a high-resolution 3D scanner called Artec Spider II, the team was able to see what had been carved on these monuments nearly 2,000 years ago. This advanced scanner captures details down to a tenth of a millimeter. Additionally, the researchers used software to artificially illuminate digital models of the stone surfaces from numerous angles to sharpen the faint outlines of hieroglyphics. As they discuss in a paper published in the journal Ancient Mesoamerica, the 3D models revealed evidence for a Long Count date of 8.7.1.0.0, our Aug. 31, AD 180. "Stela 46 has currently the earliest Long Count in the Maya Lowlands." But what makes this discovery stand out is that the date is linked to historical events. These include what may have been a ruler's accession to the throne and possibly a public ceremony featuring the Jaguar god of the Underworld. "The 3D models revealed previously unknown inscriptions that link royal succession to calendrical events, providing insights into the role of the 260-day divinatory calendar and the Long Count in asserting royal authority through ritual practices." The discovery suggests that early Maya rulers were using sophisticated political messaging in this region much earlier than previously assumed. By linking their rise to power to a sacred, cosmic context or timeline, they could consolidate their control. Written for you by our author Paul Arnold, edited by Lisa Lock, and fact-checked and reviewed by Robert Egan—this article is the result of careful human work. We rely on readers like you to keep independent science journalism alive. If this reporting matters to you, please consider a donation (especially monthly). You'll get an ad-free account as a thank-you. More information Kenichiro Tsukamoto et al, The Emergence of Kingship and Early Long Counts in the Maya Kingdom of El Palmar, Campeche, Mexico, Ancient Mesoamerica (2026). DOI: 10.1017/s0956536126100984 © 2026 Science X Network