LINK: Ancient Origins
Wonder how someone would forget about a calendar.
I was searching for '26,000' year calendars, which is approx. the length of the cyclic Mayan calendar, but also of some African calendars.
"Adam’s Calendar is controversially suggested to be the oldest man-made structure in the world. Sometimes referred to as "African Stonehenge", it predates both Stonehenge and the Great Pyramid of Giza by tens of thousands of years.""Known by African elders, as the “The Birthplace of The Sun” or “Inzalo y’Langa”, the site was first brought to public attention in 2003...