Why Did The Mayan Calendar End In 2025. A new discovery — just reported in the journal science — of the earliest known mayan astronomical calendar, featuring elaborate and detailed work by one of the most. Some people are worried it will, based on an ancient mayan calendar that comes to an end on that date.

It’s clear that by the end of the eighth century or so, the maya had degraded the natural environment substantially by removing forest for construction and agriculture. A new calendar starts the next day.