Time in the Inca Empire

The Incas lacked a distinct measurement for time.  They based their lives on when there was light, growing seasons, and certain religious celebrations.  They developed a minimalist calendar which helped predict growing seasons and tally days.  They were very reverent to their ancestors, and contemplated the future, so they had conceptions of past, present, and future.  They also crudely studied the lunar bodies.  I will compare their conceptions of space and time against other ancient Latin American civilizations such as the Aztecs and Mayans.   This intrigues me because so much of my life is dictated by the clock, which they lacked, and the well-defined calendar which they had not fully developed.