Not Mayan at all

The structure of the calendar system known as the Thirteen Moon calendar/Dreamspell is basically as follows: It proposes that we use a calendar of Thirteen different Moons of 28 days – presented as the feminine cycle – to which a "day out of time" on July 25 is added to account for the 365 days of a solar year (13 x 28 +1 = 365 days). (...)

How Mayan is then this system? Except for the signs and symbols used in the tzolkin count (260-day count) it is not Mayan at all. To begin with the ancient Maya followed a moon cycle alternating between 29 and 30 days, as did many other peoples, creating a mean of 29.5 days. This is consistent with the female cycle. Yet, many women have, partly because of the perturbations of their cycles due to the artificial lights and artificial hormones present everywhere in the modern world, come to believe that a "normal" period is 28 days. This idea is really a construct of patriarchal medicine that for ages has been frightened by what it has perceived as a magical link between the woman and the full moon cycle of about 29.5 days. Still today many women, as well as also many men, have special feelings linked to their hormones on days of full moon. The Thirteen Moon calendar thus ignores the female natural cycle and seeks to replace it with a mathematical construct of 28 days, that does not correspond to any natural cycle.(...)

Maya, 25 de Julho