The Maya Calendar is a system of calendars which the Maya used to record their history, keep track of their gods, and predict their future.
Unlike the Aztec Sunstone (pictured here), the Maya calendar was not just one disc, but a system of calendars looked like stone disks with geared clock edges.
Today, we measure time chronologically in years, decades, centuries, millennia, etc, but the Maya used cycles to measure time. The Maya noticed that some things like seasons, astronomy, and even life worked in cycles, so their calendars mimic life.
Finally, another major difference between our calendars and that of the Maya is instead of numbers the Maya used a series of symbols called, Tzolk’in, For instance, they had a separate symbol for every cycle. Imagine if we used a unique symbol for every year of our calendar!