Depiction of the 19 years of the Metonic cycle as a wheel, with the Julian date of the Easter New Moon, from a 9th-century computistic manuscript made in St. Emmeram's Abbey (Clm 14456, fol. 71r) For astronomy and calendar studies, the Metonic cycle or Enneadecaeteris (from Ancient Greek words meaning "nineteen years") is a period of very close to 19 years … [Read more...]
The Gate of the Sun Calendar from Ancient Tiwanacu
Tiwanaku Calendar and Sun Gate Explains how the ancient calendar of Tiwanaku divided the solar year into 20 parts and also combined a lunar calendar. Also explains the icons on the Gate of the Sun. Introduction - Age of Tiwanaku Posnansky calculated the age of Tiwanaku in the following manner, "it has been noted that when the observer stands at the center of the … [Read more...]