Which Native American group is known for its advanced calendar systems?

The Mayans are particularly renowned for their sophisticated calendar systems, which were among the most advanced in the ancient world. They developed a complex system that included multiple calendars, most notably the Tzolk’in, a 260-day ritual calendar, and the Haab’, a 365-day solar calendar. The Mayans’ calendrical system was deeply intertwined with their agricultural practices, religious events, and daily activities, allowing them to track time with great precision.

One of their notable achievements was the Long Count calendar, which was used to record historical dates over longer periods. This calendar allowed the Mayans to mark significant events with accurate dates, reflecting their advanced understanding of astronomy and mathematics. Their ability to predict celestial events and incorporate this knowledge into their calendars showcases their sophistication in both scientific thought and cultural practices, setting them apart as a prominent civilization in Mesoamerica.

Other groups listed, such as the Inca and Aztec, also had their calendars, but they did not achieve the same level of refinement and complexity as those of the Mayans. The Sioux, being a Plains Native American group, had different cultural practices and did not develop a system comparable to Mayan calendar systems.