This was highly intriguing, in the sense it kept me hooked all along and kept telling me to talk less and see more which is indeed what has happened and I'm quite wrong thinking so why this got no response, encouragement, or whatever... which begs the question why time is only relevant to a particular period in civilization and changes its nature from time to time...
I'm no critic, but my humble suggestion would be to consider a calendar as an artifact of time
as one unknown person said, "It is the consciousness of civilization."
The current Gregorian Calendar is based on the movement of the earth around the sun, and that is how we perceive time in terms of day and night,
but the earth and Sun are all physical bodies, and so we perceive time physically, but that is not what "Time" is all about.
The Mayan Calendar operates on completely different concepts, I'm not going to go into the details but except it was different in terms of perceiving Time, not by physical means or through the five senses.
Interestingly, a lot of Mayans and witches were killed when they tried to make it official.