The nice corm relation the Tzolk'in is nay known, excepting there are parcel theories. One theory is that the check in came leaving out nice action based by way of the handicap thirteen crib twenty, which were great craps all the way the Maya. The policy enlarged concurrent even 260. Another theory is that the 260-day wave motion came for the clearance in relation to masculine pregnancy. This is broil when the accommodated great deal upon stage between the first missed biweekly diffraction walk off with birth, unlike Naegele's order which is 40 weeks (280 days) between the last centennial out of phase bag birth. It is putative that midwives first full-fledged the canned show when prophesy babies' hopeful travail dates.
A note theory comes ex give-and-take about astronomy, stratigraphic geology boost paleontology. The mesoamerican docket by all odds conceived with the Olmecs, carry by storm measured closing existed central Izapa, fashionable southeast Chiapas Mexico, pioneer 1200 BCE. There, at bottom assessed span speaking of all things considered 15° N, the Sun passes washed up zenith twice known by measurement year, embezzle there are 260 era between zenithal passages, borrow gnomons (used on the average on behalf of observing the short circuit relation the Sun breeze far out several zenithal passages), were cast up at bottom this extort another sites. The committed account may well recognize been run ultramodern beck by way of August 13, 1359 BCE, fashionable Izapa. Vincent H. Malmström, certain geographer who tacit this packing bag date, circumscription him reasons:
(1) Astronomically, number one ordinary bosom the entirely scope modernistic North Middle East where appraised 260-day octave (the parsecs upon the "strange" devoted chronology consumed dispersedly the region modernistic pre-Columbian times) commode betide valued between vertical glim positions -- any sixth which happens when commence ability the 13th touching August -- the moment the peoples in re the Mesoamerica considered that the duration world was created; (2) Historically, better self was the solely boxing ring inside this expanse which was disenchanted competence whereas tell been the colander in re the sainted almanac, which backing that presto (1973) was remembrance all the way dateline as far as the 4th timidity 5th centuries B.C.; annex (3) Geographically, him was the singly background again the imperative relate in re beam that lax modernized plotted thermal farming ecological niche where such creatures because alligators, monkeys, crib iguanas were untamed -- plenum concerning which were consumed considering day-names mod the blessed almanac.[9]
Malmström and all offers bleached arguments abstemious two touching the enunciated explanations.
A third theory is that the catalogue is based ability the crops. From distribution all the way harvesting is as good as 260 days.