Why was the calendar important for the Maya religion?

Maya religious beliefs also led to the development of the calendar, mathematics, and Astronomy. They Maya believed that time was a burden carried on the back of a god. At the end of a day, month, or year, on god would lay the burden down and another would pick it up. A day would be lucky or unlucky, depending on the nature of the god. So it was very important to have an accurate calender to know which god was in charge of the day.