El Castillo at Chichen Itza in Mexico is a limestone step pyramid whose terraces, staircases and summit temple encode the ...

A 13th-century manuscript sits under glass, its bark-paper pages filled with vivid glyphs and cryptic figures, in a quiet reading room in Dresden, Germany. Known as the Dresden Codex, it’s one of the ...

If you thought 365 days was a long time, try resetting your calendar every 18,980 days instead. 52 solar years make up the longest cycle of the Mayan calendar – a complex and ancient system that’s ...

Get your calendars out, because there may be a correction to make as a growing list of skeptics – including the Minneapolis professor who re-arranged the zodiac – say the end of Mayan calendar may be ...

Scientists have solved a longstanding mystery about a Maya calendar that includes 819 days, an unusual number that has puzzled experts for decades, reports a new study. A pair of anthropologists ...

The Maya Calendar, first devised by the Olmecs and perfected by the ancient Maya civilization, is a complicated timekeeping system made up of three calendars. The Long Count Calendar covers a vast ...

The calendar, rooted on observations of the movements of the sun, moon and planets, was based on a ritual cycle of 260 named days. The 260-day calendar, called the tzolk’in, was one of several ...

Here’s what you’ll learn when you read this story: A 12 th century C.E. codex from Maya culture accurately predicts solar eclipses. The eclipse table in the Dresden Codex was a lunar calendar that ...