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.
The opposite is true for the Tropic of Capricorn. The transit of the Sun from August 13 to April 30 when the Sun is transiting south of the Tropic of Cancer zenith is about 260 days connecting this zenith cycle with the Venus cycle. Venus spends 260 days first as a morning star and then 260 days as an evening star (when counting the time Venus is with the Sun when both direct and retrograde) and was a very important connection to the Mayan way of tracking time. This also lends credibility to August 13th as the classic Maya Creation Day.
Some researchers suggest August 13, 3114 BC is as precise and accurate a starting date for the beginning of current history as we understand now as one can get. The first Egyptian dynasty is dated to circa 3100 BC; the first ‘city,’ Uruk, in Mesopotamia, also 3100 BC; the Hindu Kali Yuga, 3102 BC. Most interestingly, the division of time into 24 hours of 60 minutes each and each minute into 60 seconds [and the division of the circle into 360 degrees] came into use around 3100 BC, in Sumeria. This all lends support to this Timing as it is aligned with other sources. More here
Plus, also worth noting is at dawn on August 13 the constellation Orion is at the zenith (directly overhead) and the Milky Way is visibly erect over the Earth. (FYI…This same phenomenon is repeated at sunset on February 5.) This is yet another factor drawing our attention to the importance of the star patterns that occur on August 13.
12 minute video on the Solar Zenith