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THE
HOW AND WHY OF THE MAYAN END DATE IN 2012
A.D.
by John Major Jenkins
¾ May 23rd, 1994
Originally published in the Dec-Jan '95 issue
of Mountain Astrologer.
Why did the ancient Mayan or pre-Maya choose
December 21st, 2012 A.D., as the end of their
Long Count calendar? This article will cover
some recent research. Scholars have known for
decades that the 13-baktun cycle of the Mayan "Long
Count" system of timekeeping was set to
end precisely on a winter solstice, and that
this system was put in place some 2300 years
ago. This amazing fact - that ancient Mesoameri-
can skywatchers were able to pinpoint a winter
solstice far off into the future - has not been
dealt with by Mayanists. And why did they choose
the year 2012? One immediately gets the impression
that there is a very strange mystery to be confronted
here. I will be building upon a clue to this
mystery reported by epigrapher Linda Schele in
Maya Cosmos (1994). This article is the natural
culmination of the research relating to the Mayan
Long Count and the precession of the equinoxes
that I explored in my recent book Tzolkin: Visionary
Perspectives and Calendar Studies (Borderlands
Science and Research Foundation, 1994).
The Mayan Long Count
Just some basics to get us started. The Maya were adept skywatchers. Their
Classic Period is thought to have lasted from 200 A.D. to 900 A.D., but recent
archeological findings are pushing back the dawn of Mayan civilization in
Mesoamerica. Large ruin sites indicating high culture with distinctly Mayan
antecedents are being found in the jungles of Guatemala dating back to before
the common era. And even before this, the Olmec civilization flourished and
developed the sacred count of 260 days known as the tzolkin. The early Maya
adopted two different time keeping systems, the "Short Count" and
the Long Count. The Short Count derives from combining the tzolkin cycle
with the solar year and the Venus cycle of 584 days. In this way, "short" periods
of 13, 52 and 104 years are generated. Unfortunately, we won't have occasion
to dwell on the properties of the so-called Short Count system here. The
Long Count system is somewhat more abstract, yet is also related to certain
astronomical cycles. It is based upon nested cycles of days multiplied at
each level by that key Mayan number, twenty:
Number of Days / Term
1 / Kin (day)
20 / Uinal
360 / Tun
7200 / Katun
144000 / Baktun
Notice that the only exception to multiplying
by twenty is at the tun level, where the uinal
period is instead multiplied by 18 to make the
360-day tun. The Maya employed this counting
system to track an unbroken sequence of days
from the time it was inaugurated. The Mayan scholar
Munro Edmonson believes that the Long Count was
put in place around 355 B.C. This may be so,
but the oldest Long Count date as yet found corresponds
to 32 B.C. We find Long Count dates in the archeological
record beginning with the baktun place value
and separated by dots. For example: 6.19.19.0.0
equals 6 baktuns, 19 katuns, 19 tuns, 0 uinals
and 0 days. Each baktun has 144000 days, each
katun has 7200 days, and so on. If we add up
all the values we find that 6.19.19.0.0 indicates
a total of 1007640 days have elapsed since the
Zero Date of 0.0.0.0.0. The much discussed 13-baktun
cycle is completed 1872000 days (13 baktuns)
after 0.0.0.0.0. This period of time is the so
called Mayan "Great Cycle" of the Long
Count and equals 5125.36 years.
But how are we to relate this to a time frame
we can understand? How does this Long Count relate
to our Gregorian calendar? This problem of correlating
Mayan time with "western" time has
occupied Mayan scholars since the beginning.
The standard question to answer became: what
does 0.0.0.0.0 (the Long Count "beginning" point)
equal in the Gregorian calendar? When this question
is answered, archeological inscriptions can be
put into their proper historical context and
the end date of the 13-baktun cycle can be calculated.
After years of considering data from varied fields
such as astronomy, ethnography, archeology and
iconography, J. Eric S. Thompson determined that
0.0.0.0.0 correponded to the Julian date 584283,
which equals August 11th, 3114 B.C. in our Gregorian
calendar. This means that the end date of 13.0.0.0.0,
some 5125 years later, is December 21st, 2012
A.D.1
The relationship between the Long Count and
Short Count has always been internally consistent
(both were tracked alongside each other in an
unbroken sequence since their conception). Now
it is very interesting to note that an aspect
of the "Short Count", namely, the sacred
tzolkin count of 260 days, is still being followed
in the highlands of Guatemala. As the Mayan scholar
Munro Edmonson shows in The Book of the Year,
this last surviving flicker of a calendar tradition
some 3000 years old supports the Thompson correlation
of 584283. Edmonson also states that the Long
Count was begun by the Maya or pre-Maya around
355 B.C., but there is reason to believe that
the Long Count system was being perfected for
at least 200 years prior to that date.
The point of interest for these early astronomers
seems to have been the projected end date in
2012 A.D., rather than the beginning date in
3114 B.C. Having determined the end date in 2012
(for reasons we will come to shortly), and calling
it 13.0.0.0.0, they thus proclaimed themselves
to be living in the 6th baktun of the Great Cycle.
The later Maya certainly attributed much mythological
significance to the beginning date, relating
it to the birth of their deities, but it now
seems certain that the placement of the Long
Count hinges upon its calculated end point. Why
did early Mesoamerican skywatchers pick a date
some 2300 years into the future and, in fact,
how did they pinpoint an accurate winter solstice?
With all these considerations one begins to suspect
that, for some reason, the ancient New World
astronomers were tracking precession.
The Precession
The precession of the equinoxes, also known as the Platonic Year, is caused
by the slow wobbling of the earth's polar axis. Right now this axis roughly
points to Polaris, the "Pole Star," but this changes slowly over
long periods of time. The earth's wobble causes the position of the seasonal
quarters to slowly precess against the background of stars. For example,
right now, the winter solstice position is in the constellation of Sagittarius.
But 2000 years ago it was in Capricorn. Since then, it has precessed backward
almost one full sign. It is generally thought that the Greek astronomer Hipparchus
was the first to discover precession around 128 B.C. Yet scholarship indicates
that more ancient Old World cultures such as the Egyptians (see Schwaller
de Lubicz's book Sacred Science) and Babylonians also knew about the precession.
I have concluded that even cultures with simple
horizon astronomy and oral records passed down
for a hundred years or so, would notice the slow
shifting of the heavens. For example, imagine
that you lived in an environment suited for accurately
demarcated horizon astronomy. Even if this wasn't
the case, you might erect monoliths to sight
the horizon position of, most likely, the dawning
winter solstice sun. This position in relation
to background stars could be accurately preserved
in oral verse or wisdom teachings, to be passed
down for centuries. Since precession will change
this position at the rate of 1 degree every 72
years, within the relatively short time of 100
years or so, a noticeable change will have occurred.
The point of this is simple. To early cultures
attuned to the subtle movements of the sky, precession
would not have been hard to notice.2
The Maya are not generally credited with knowing
about the precession of the equinoxes. But considering
everything else we know about the amazing sophistication
of Mesoamerican astronomy, can we realistically
continue to deny them this? Many of the as yet
undeciphered hieroglyphs may ultimately describe
precessional myths. Furthermore, as I show in
my book Tzolkin: Visionary Perspectives and Calendar
Studies, the Long Count is perfectly suited for
predicting future seasonal quarters, indefinitely,
and precession is automatically accounted for.
Some of the most incredible aspects of Mayan
cosmo-conception are just now being discovered.
As was the case with the state of Egyptology
in the 1870's, we still have a lot to learn.
In addition, Mayanists like Gordon Brotherston
(The Book of the Fourth World) consider precessional
knowledge among Mesoamerican cultures to be more
than likely.
The Sacred Tree
We are still trying to answer these questions: What is so important about the
winter solstice of 2012 and, exactly how were calculations made so accurately,
considering that precession should make them exceedingly difficult?
If we make a standard horoscope chart for December
21st, 2012 A.D., nothing very unusual appears.
In this way I was led astray in my search until
Linda Schele provided a clue in the recent book
Maya Cosmos. Probably the most exciting breakthrough
in this book is her identification of the astronomical
meaning of the Mayan Sacred Tree. Drawing from
an impressive amount of iconographic evidence,
and generously sharing the process by which she
arrived at her discovery, the Sacred Tree is
found to be none other than the crossing point
of the ecliptic with the band of the Milky Way.
Indeed, the Milky Way seems to have played an
important role in Mayan imagery. For example,
an incised bone from 8th century Tikal depicts
a long sinking canoe containing various deities.
This is a picture of the night sky and the canoe
is the Milky Way, sinking below the horizon as
the night progresses, and carrying with it deities
representing the nearby constellations. The incredible
Mayan site of Palenque is filled with Sacred
Tree motifs and references to astronomical events.
In their book Forest of Kings, Schele and Freidel
suggested that the Sacred Tree referred to the
ecliptic. Apparently that was only part of the
picture, for the Sacred Tree that Pacal ascends
in death is more than just the ecliptic, it is
the sacred doorway to the underworld. The crossing
point of Milky Way and ecliptic is this doorway
and represents the sacred source and origin.
In the following diagram of the well known sarcophagus
carving, notice that the Milky Way tree serves
as an extension of Pacal's umbilicus. The umbilicus
is a human being's entrance into life, and entrance
into death as well:

Diagram 1: Pacal and the Sacred Tree.
We may also remember at this point that the tzolkin calendar is said to spring
from the Sacred Tree. The Sacred Tree is, in fact, at the center of the entire
corpus of Mayan Creation Myths. We should definitely explore the nature of
this astronomical feature.
The first question that came up for me was as
follows. Since Lord (Ahau) Pacal is, by way of
divine kingship, equated with the sun, and he
is portrayed "entering" the Sacred
Tree on his famous sarcophagus lid, on what day
does the sun come around to conjunct the crossing
point of ecliptic and Milky Way? This would be
an important date. In the pre-dawn skies of this
date, the Milky Way would be seen to arch overhead
from the region of Polaris (Heart of Sky) and
would point right at where the sun rises. This
(and the corollary date 6 months later) is the
only date when the Sun/Lord could jump from the
ecliptic track and travel the Milky Way up and
around the vault of heaven to the region of Polaris,
there to enter the "Heart of Sky." It
should be mentioned that 1300 years ago, during
the zenith of Palenque's glory, Polaris was much
less an exact "Pole Star" than it is
now. Schele demonstrates that it wasn't a Pole
Star that the Maya mythologized in this regard,
it was the unmarked polar "dark region" symbolizing
death and the underworld around which everything
was observed to revolve. Life revolves around
death - a characteristically Mayan belief. The
dates on which the sun conjuncts the "Sacred
Tree" are thus very important. These dates
will change with precession. Schele doesn't pursue
this line of reasoning, however, and doesn't
even mention that these dates might be significant.
If we go back to 755 A.D., we find that the sun
conjuncts the Sacred Tree on December 3rd. I
should point out here that the Milky Way is a
wide band, and perhaps a 10-day range of dates
should be considered.
To start with, however, I use the exact center
of the Milky Way band that one finds on star
charts, known as the "Galactic Equator" (not
to be confused with Galactic Center). Where the
Galactic Equator crosses the ecliptic in Sagittarius
just happens to be where the dark rift in the
Milky Way begins. This is a dark bifurcation
in the Milky Way caused by interstellar dust
clouds. To observers on earth, it appears as
a dark road which begins near the ecliptic and
stretches along the Milky Way up towards Polaris.
The Maya today are quite aware of this feature;
the Quich» Maya call it xibalba be (the "road
to Xibalba") and the Chorti Maya call it
the "camino de Santiago". In Dennis
Tedlock's translation of the Popol Vuh, we find
that the ancient Maya called it the "Black
Road". The Hero Twins Hunahpu and Xbalanque
must journey down this road to battle the Lords
of Xibalba. (Tedlock 334, 35. Furthermore, what
Schele has identified as the Sacred Tree was
known to the ancient Quich» simply as "Crossroads."
This celestial feature was not marginal in ancient
Mayan thought and is still rec- ognized even
today. In terms of how this feature was mythologized,
it seems that when a planet, the sun, or the
moon entered the dark cleft of the Milky Way
in Sagittarius (which happens to be the exact
center of the Milky Way, the Galactic Equator),
entrance to the underworld road was possible,
which could then take the journeyer up to the
Heart of Sky. Shamanic vision rites were probably
involved in this scenario. In the Yucatan, underground
caves were ritual places used by shaman to journey
to the underworld. Schele explains that "Mayan
mythology identifies the Road to Xibalba as going
through a cave" (Forest of Kings, 209).
Here we have a metaphorical reference to the "dark
rift" in the Milky Way by way of its terrestrial
counterpart, a syncretism between earth and sky
which is characteristic of Mayan thinking. Above
all, what is becoming apparent from the corpus
of Mayan Creation Myths is that creation seems
to have taken place at a celestial crossroads
- the crossing point of ecliptic and Milky Way.
To clarify this ever growing picture, we should
stop here and plot out some charts. In addition
to the detailed star maps from Norton's 2000.0
Star Atlas which allowed me to pinpoint the crossing
point of Galactic Equator and ecliptic, I use
EZCosmos to plot these positions3. What I found
answers the question of why the Maya chose the
winter solstice of 2012, a problem seemingly
avoided by astronomers and Mayanists alike. While
it is true that the sun conjuncts the Sacred
Tree on December 3rd in the year 755 A.D., over
the centuries precession has caused the conjunction
date to approach the winter solstice. So, how
close are we to perfect conjunction today? Exactly
when might we expect the winter solstice sun
to conjunct the crossing point of Galactic Equator
and ecliptic - the Mayan Sacred Tree? Any astronomer
will tell you that, presently, the Milky Way
crosses the ecliptic through the constellation
of Sagittarius and this area is rich in nebulae
and high density objects. In fact, where the
Milky Way crosses the ecliptic in Sagittarius
also happens to be the direction of the Galactic
Center.4
The Charts
So the quest returns to identifying why December 21st, 2012 A.D. might represent
some kind of astronomical anomoly. I'll get right to the heart of the matter.
Let's look at a few charts.

Chart 1.
Here is a full view of the sky at noon on December 21st, 2012 A.D. The band
of the Milky Way can be seen stretching from the lower right to the upper
left. The more or less vertical dotted line indicates the Galactic Equator.
The planets can be seen tracing a roughly horizontal path through the chart,
indicating the ecliptic. The sun, quite strikingly, is dead center in the
Sacred Tree. Let's look closer.

Chart 2.
The field is now reduced from a horizon-to-horizon view to a field of 30 degrees.
Part of the constellation of Sagittarius can be seen in the lower left portion
of the chart. The planet in the middle-to-upper left portion of the chart
is Pluto, which rarely travels directly along the ecliptic. The center square
near the sun is placed on the Trifid Nebula (M20). According to the star
chart I used, this nebula is very close to the crossing point of Galactic
Equator and ecliptic. However, a small star (4 Sgr) is even closer; it sits
right on the Galactic Equator and its declination is only 00 .08' below the
ecliptic. Let's look closer at these features.

Chart 3.
The field is now reduced to a 5-degree span, what astrology considers to be
within conjunction. The dot to the lower right of the sun is the star 4 Sgr.
Amazingly, the Sun is right on target. We couldn't have hoped for a closer
conjunction. 1 day before or after will remove the sun a noticeable distance
from the crossing point. December 21st, 2012 (13.0.0.0.0 in the Long Count)
therefore represents an extremely close conjunction of the winter solstice
sun with the crossing point of Galactic Equator and the ecliptic, what the
ancient Maya recognized as the Sacred Tree. It is critical to understand
that the winter solstice sun rarely conjuncts the Sacred Tree. In fact, this
is an event that has been coming to resonance very slowly over thousands
and thousands of years. What this might mean astrologically, how this might
effect the "energy weather" on earth, must be treated as a separate
topic.
But I should at least mention in passing that
this celestial convergence appears to parallel
the accelerating pace of human civilization.
It should be noted that because precession is
a very slow process, similar astronomical alignments
will be evident on the winter solstice dates
within perhaps 5 years on either side of 2012.
However, the accuracy of the conjunction of 2012
is quite astounding, beyond anything deemed calculable
by the ancient Maya, and serves well to represent
the perfect mid-point of the process.
Let's go back to the dawn of the Long Count
and try to reconstruct what may have been happening.
Why: Winter Solstice Sun Conjuncts
The Sacred Tree in 2012 A.D.
First, the tzolkin count originated among the
Olmec at least as early as 679 B.C. (see Edmonson's
Book of the Year). We may suspect that astronomical
observations were being made from at least that
point. The tzolkin count has been followed unbroken
since at least that time, up to the present day,
demonstrating the high premium placed by the
Maya upon continuity of tradition. In this way,
star records, horizon positions of the winter
solstice sun, and other pertinent observations
could also have been accurately preserved. As
suggested above, precession can be noticed by
way of even simple horizon astronomy in as little
time as 100 to 150 years. (Hipparchus, the alleged "discoverer" of
precession among the Greeks, compared his own
observations with data collected only 170 years
before his time.) Following Edmonson, the Long
Count system may have appeared as early as 355
B.C. Part of the reason for implementing the
Long Count system, as I will show, was probably
to calculate future winter solstice dates.
We must assume that even at this early point
in Mesoamerican history, the crossing point of
ecliptic and Milky Way was understood as the "Sacred
Tree". Since the Sacred Tree concept is
intrinsically tied into the oldest Mayan Creation
Myths, this is not improbable. At the very least,
the "dark rift" was already a recognized
feature. Early skywatchers of this era (355 B.C.)
would then observe the sun to conjunct the dark
ridge in the Milky Way on or around November
18th.5 This would be easily observed in the pre-dawn
sky as described above: the Milky Way points
to the rising sun on this date.
Over a relatively short period of time, as an
awareness of precession was emerging, this date
was seen to slowly approach winter solstice,
a critical date in its own right in early Mayan
cosmo-conception. At this point, precession and
the rate of precession was calculated, the Long
Count was perfected and inaugurated, and the
appropriate winter solstice date in 2012 A.D.
was found via the Long Count in the following
way.
How: Long Count and Seasonal Quarters
Long Count katun beginnings will conjunct sequential seasonal quarters every
1.7.0.0.0 days (194400 days). This is an easily tracked Long Count interval.
Starting with the katun beginning of 650 B.C.:
Long Count Which Quarter? Year
6.5.0.0.0 Fall 650 B.C.
7.12.0.0.0 Winter 118 B.C.
8.19.0.0.0 Spring 416 A.D.
10.6.0.0.0 Summer 948 A.D.
11.13.0.0.0 Fall 1480 A.D.
13.0.0.0.0 Winter 2012 A.D.
Note that the last date is not only a katun beginning, but a baktun beginning
as well. It is, indeed, the end date of 2012.6
The Long Count may have been officially inaugurated
on a specific date in 355 B.C., as Edmonson suggests,
but it must have been formulated, tried, tested,
and proven before this date. This may well have
taken centuries, and the process no doubt paralleled
(and was perhaps instigated by) the discovery
of precession. The Long Count system automatically
accounts for precession in its ability to calculate
future seasonal quarters - a property which shouldn't
be underestimated.
Summary
This has been my attempt to fill a vacuum in Mayan Studies, an answer to the
why and how of the end date of the 13-baktun cycle of the Mayan Long Count.
The solution requires a shift in how we think about the astronomy of the
Long Count end date. The strange fact that it occurs on a winter solstice
immediately points us to possible astronomical reasons, but they are not
obvious. We also shouldn't forget the often mentioned fact that the 13-baktun
cycle of some 5125 years is roughly 1/5th of a precessional cycle. This in
itself should have been suggestive of a deeper mystery very early on. Only
with the recent identification of the astronomical nature of the Sacred Tree
has the puzzle revealed its fullness. And once again we are amazed at the
sophistication and vision of the ancient New World astronomers, the decendants
of whom still count the days and watch the skies in the remote outbacks of
Guatemala.
This essay is not contrived upon sketchy evidence.
It basically rests upon two facts:
1) the well known end date of the 13-baktun
cycle of the Mayan Long Count, which is December
21st, 2012 A.D. and
2) the astronomical situation on that day. Based
upon these two facts alone, the creators of the
Long Count knew about and calculated the rate
of precession over 2300 years ago. I can conceive
of no other conclusion. To explain this away
as "coincidence" would only obscure
the issue.
For early Mesoamerican skywatchers, the slow
approach of the winter solstice sun to the Sacred
Tree was seen as a critical process, the culmination
of which was surely worthy of being called 13.0.0.0.0,
the end of a World Age. The channel would then
be open through the winter solstice doorway,
up the Sacred Tree, the Xibalba be , to the center
of the churning heavens, the Heart of Sky.
Notes:
1Linda Schele and David Freidel, unlike most
Mayanists, continue to support the work of Floyd
Lounsbury in promoting the 584285 correlation.
This is 2 days off from the Thompson correlation
that I use. The decisive factor in supporting
the Thompson correlation of 584283 is the fact
that it corresponds with the tzolkin count still
followed in the highlands of Guatemala. To account
for this discrepency in his correlation, Lounsbury
claims that the count was shifted back two days
sometime before the conquest (not likely), thus
explaining its present placement. This means
that either correlation will give the December
21st end date. Nevertheless, Schele and Freidel
still report that the end date is December 23rd,
2012 rather than Dec. 21st, an unfortunate faux
pas understandable only because they aren't particularly
interested in the specifics of the correlation
debate. For a detailed discussion of this topic,
refer to my book Tzolkin: Visionary Perspectives
and Calendar Studies.
2Case in point is the mysterious existence of
myths obviously describing precession in the
ancient verses of the Kalevala, the Finnish National
Epic. These myths were relayed from the earliest
times by way of singers. Many of these stories
are thoroughly magical and are filled with sky
lore. The Finnish language is not of Indo- European
origin and up until the late 19th century peasants
in Finland and northwestern Russia had little
contact with Europe. Indeed, their heritage suggests
more contact with Central Asia than Europe. Some
of the Kalevala stories describe a sacred Mill
called the Sampo (derived from sanskrit Skambha
= pillar or pole) with a "many ciphered
cover". This spinning Mill is a metaphor
for a Golden Age of plenty and the starry sky
spinning around the Pole Star (known as the Nail
of the North), which in the Far North is almost
straight over head. The Mill at some point is
disturbed, its pillar being pulled out of its
peg, and a new one - a new "age" -
must be constructed. This becomes the chore of
Ilmarinen, the primeval smith. In this legend,
ancient knowledge of precession among unsophisticated "peasants" who
were nonetheless astute skywatchers, was preserved
via oral tradition almost down to modern times.
3EZCosmos is a graphic software package that
can accurately plot and animate the positions
of planets, stars, nebula and so on, for 14,000
years. It is well suited to this research because
it accounts for precession in its positional
calculations. It also happens to be the software
that Linda Schele used to discover the astronomical
meaning of the Mayan Sacred Tree.
4 Here we briefly converge with the ideas of
Terence McKenna. In the book he co- authored
with his brother Dennis (Invisible Landscape,
Seabury Press 1975 and Harper San Francisco,
1993), Terence suggests that the position of
winter solstice sun within 3 degrees of the Galactic
Center in the year 2012 A.D. (a "once-in-a-precessional-
cycle" event) may provide the eschatological
end point for his theory of time known as Timewave
Zero. His end date was chosen for historical
reasons and was, apparently, only later discovered
to correspond with the Mayan end date. The McKennas
point out that this unusual astronomical situation
has been noted by other writers, namely, Giorgio
de Santillana and Hertha von Dechend in Hamlet's
Mill (1969). As ACS Publication's The American
Ephemeris for the 21st Century shows, in the
year 2012 the Galactic Center is at 27 Sagittarius
(within 3 of winter solstice). Thus McKenna demonstrates
that on winter solstice of 2012, Galactic Center
will be rising heliacally just before dawn, in
a way reminiscent of how the Maya observed Venus's
last morningstar appearance.
5This basically follows the "1 degree every
72 years" rule of precession. In this way,
back in 3114 B.C. the sun conjuncted the Sacred
Tree on Oct 10th, which is 72 degrees, or 1/5th
of the ecliptic from the winter solstice. The
Fall Equinox sun conjuncted the Sacred Tree about
6400 years ago (1/4th of a precessional cycle).
Ancient cultures in Mesopotamia may have recognized
this alignment, and called it a Golden Age. The
fall from this state of alignment may be responsible
for the original Fall from Paradise myth, which
filtered out to the Judaic tradition.
6The Long Count has other strange astronomical
properties. For instance, the 13- katun cycle
of 256 years was known to the Yucatec Maya as
a prophecy cycle. We see it used in the Books
of Chilam Balam. The astronomical reference here
is to conjunction cycles of Uranus and Pluto,
two of which equal 256 years. From another angle,
3 katuns equal exactly 37 synodical cycles of
Venus.
Sources:
Brotherston, Gordon. The Book of the Fourth
World. Cambridge University Press. 1992.
Edmonson, Munro. The Book of the Year. University
of Utah Press, Salt Lake City, Utah. 1988.
EZCosmos. Astrosoft, Inc. DeSoto, Texas. 1990.
Jenkins, John Major. Tzolkin: Visionary Perspectives
and Calendar Studies. Borderlands Science and
Research Foundation. Garberville, CA. 1994.
Mayan Calendrics. Dolphin Software. 48 Shattuck
Square #147, Berkeley, CA. 94704. 1989 &1993.
Meeus, Jean. Astronomical Tables of the Sun,
Moon and Planets. Willmann- Bell Publishers.
Richmond, VA. 1983.
Michelsen, Neil F. The American Ephemeris for
the 21st Century. ACS Publications. San Diego,
CA. 1982, 1988.
Ridpath, Ian (ed.). Norton's 2000.0: Star Atlas
and Reference Handbook. Longman Group UK Limited.
1989.
Schele, Linda and Freidel, David. A Forest of
Kings: The Untold Story of the Ancient Maya.
William Morrow and Company, Inc. New York. 1990.
Schele, Linda; Freidel, David; Parker, Joy.
Maya Cosmos: Three Thousand Years on the Shaman's
Path. William Morrow and Company, Inc. New York.
1993.
Tedlock, Dennis. The Popol Vuh: The Definitive
Edition of the Mayan Book of the Dawn of Life
and the Glories of Gods and Kings. Simon & Schuster.
New York.
1985
Author's Biographical Information:
John Major Jenkins (March 4th, 1964, 9:19 p.m.,
Chicago) is a student of Mayan time. On several
trips to Central America in the late 80's, he
worked and lived with the Quich» and Tzutujil
Maya in Guatemala. Observations gathered on these
trips were published in Chicago area newspapers.
Since then he has devoted his time to studying
Mayan cosmo-conception and the mathematical and
philosophical properties of the sacred calendar.
More thought provoking ideas can be found in
his recent book Tzolkin: Visionary Perspectives
and Calendar Studies (Borderlands Science and
Research Foundation, 1994). Additional information
on the Mayan end date alignment is available
by writing the author at Four Ahau Press: P.O.
Box 3; Boulder, CO 80306. Four Ahau Web Site
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