Quote:
Originally Posted by a.lien
I mean it could be? Why not? It's just a human construct that allows us to keep track of dates.
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Well, most calendars are not entirely just human constructs. The Mayan 260 day calendar was indeed a totally human construct because it had no astronomical basis that I know of (please correct me if I'm wrong; maybe it was some synodic cycle?). However, the "other" Mayan calendar, as well as Julian and Gregorian calendars, are solar years, thus astronomically based (albeit some are more exact than others). So it's not as arbitrary as you think.