This hieroglyph is the oldest known record of the Maya calendar
The system is still used today, a testament to the persistence of Maya knowledge
![two fragment so of a Maya mural showing a drawing of the 7 Deer hieroglyph](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2022/04/041322_ag_maya-calendar_feat.jpg?fit=1030%2C580&ssl=1)
These two plaster mural fragments jigsaw together to form a record of the date “7 Deer” from the ancient 260-day Maya calendar. The pieces, which fit in the palm of a human hand, may have accompanied a scene or human figure as a sort of ancient timestamp.
San Bartolo-Xultun Regional Archaeological Project