This hieroglyph is the oldest known record of the Maya calendar
Plaster fragments with the markings date to at least 200 B.C. and indicate that the calendar system, still used today, might be centuries older.

This hieroglyph is the oldest known record of the Maya calendar

Plaster fragments with the markings date to at least 200 B.C. and indicate that the calendar system, still used today, might be centuries older.