which group developed a complex calendar

Answer 1

The ancient Maya civilization is well-known for developing a complex calendar system. The Maya created several interrelated calendars, including the Tzolk'in (a 260-day ritual calendar), the Haab' (a 365-day solar calendar), and the Long Count calendar, which was used to track longer periods of time. Their calendars were based on astronomical observations and had significant cultural and religious importance in Maya society.