First Calendar In History
First Calendar In History. People of ancient times based their calendars on the most obvious regular events they knew—the changing positions of the. The length of a lunar month, from one.
The calendar used today in the west has its roots in the system developed by the astronomers of mesopotamia—and particularly the mesopotamian civilization of. We do not know exactly when the counts of the calendar were first adopted in mesoamerican history, but archaeology tells us that the calendar’s past lies deep in the.