The Mayan civilization was known for its intricate calendar system, which included the Tzolk'in, a 260-day ceremonial calendar, and the Haab', a 365-day solar calendar. These calendars were highly complex, reflecting their deep understanding of astronomy and timekeeping. The Mayans used these calendars for agricultural purposes, religious ceremonies, and societal organization, demonstrating their advanced knowledge of celestial cycles. The Long Count calendar was also significant for marking historical dates over longer periods. The precision of the Mayan calendar system remains a testament to their remarkable achievements in mathematics and astronomy.