Research on Mayan hieroglyphs suggests August 13 is an important day in Mayan Cosmology honoring the classic Maya Creation Day. August 13 also marks a Solar Zenith transit for those located around 14 degrees and 48 minutes North Latitude lending further confirmation to the importance of this day in Mayan Cosmology. At this latitude on August 13 the Sun is located directly overhead at Noon and vertical objects cast no shadows. This is similar to the pyramid Kukulcan at Chichen Itza when the Sun reaches its Zenith on May 20.
Zenith points are also experienced at the June 22 Solstice on the Tropic of Cancer and December 22 on the Tropic of Capricorn.On the equator the zenith transits of the Sun divide the year into two equal halves at the Equinoxes. Between the equator and the Tropic of Cancer, the zenith transits of the Sun divide the year into a longer time frame when the Sun is transiting south of the zenith, and a shorter time frame when the Sun is transiting to its northern zenith. Read More