Keeping track of time was a big deal for the Aztecs. They did it for religious reasons and also for planting crops.
They had two separate calendars: a solar calendar and a sacred calendar. The Aztecs split their history into 52-year time periods, and each one was a “Sun.” They believed they lived in the time of the fifth Sun. The dates on the two calendars came together once every 52 years. Near the end of each Sun, the Aztecs feared the Sun would set and never rise again. That would mean the world had ended.
