In what ways were calendars useful to Maya, Aztec, and Inca peoples?

Question

I'm trying to study so if you could tell me that'd be great :)

Answer 1

i only know that the maya used the calendars for planning religious festivals

Answer 2

https://www.sutori.com/story/the-making-of-different-calendars-the-maya-inca-aztecs

Answer 3

Thanks Ms. Sue, but i need your help no longer. :)