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The Maya calendar is a system of
calendar A calendar is a system of organizing days. This is done by giving names to periods of time, typically days, weeks, months and years. A date is the designation of a single and specific day within such a system. A calendar is also a phy ...
s used in
pre-Columbian In the history of the Americas, the pre-Columbian era spans from the original settlement of North and South America in the Upper Paleolithic period through European colonization, which began with Christopher Columbus's voyage of 1492. Usually, ...
Mesoamerica Mesoamerica is a historical region and cultural area in southern North America and most of Central America. It extends from approximately central Mexico through Belize, Guatemala, El Salvador, Honduras, Nicaragua, and northern Costa Rica. Wit ...
and in many modern communities in the
Guatemala Guatemala ( ; ), officially the Republic of Guatemala ( es, República de Guatemala, links=no), is a country in Central America. It is bordered to the north and west by Mexico; to the northeast by Belize and the Caribbean; to the east by Hon ...
n highlands,
Veracruz Veracruz (), formally Veracruz de Ignacio de la Llave (), officially the Free and Sovereign State of Veracruz de Ignacio de la Llave ( es, Estado Libre y Soberano de Veracruz de Ignacio de la Llave), is one of the 31 states which, along with Me ...
,
Oaxaca Oaxaca ( , also , , from nci, Huāxyacac ), officially the Free and Sovereign State of Oaxaca ( es, Estado Libre y Soberano de Oaxaca), is one of the 32 states that compose the Federative Entities of Mexico. It is divided into 570 municipaliti ...
and
Chiapas Chiapas (; Tzotzil and Tzeltal: ''Chyapas'' ), officially the Free and Sovereign State of Chiapas ( es, Estado Libre y Soberano de Chiapas), is one of the states that make up the 32 federal entities of Mexico. It comprises 124 municipalities ...
, Mexico. The essentials of the Maya calendar are based upon a system which had been in common use throughout the region, dating back to at least the 5th century BC. It shares many aspects with calendars employed by other earlier Mesoamerican civilizations, such as the Zapotec and
Olmec The Olmecs () were the earliest known major Mesoamerican civilization. Following a progressive development in Soconusco, they occupied the tropical lowlands of the modern-day Mexican states of Veracruz and Tabasco. It has been speculated that ...
and contemporary or later ones such as the
Mixtec The Mixtecs (), or Mixtecos, are indigenous Mesoamerican peoples of Mexico inhabiting the region known as La Mixteca of Oaxaca and Puebla as well as La Montaña Region and Costa Chica Regions of the state of Guerrero. The Mixtec Cult ...
and Aztec calendars. By the Maya mythological tradition, as documented in Colonial Yucatec accounts and reconstructed from Late Classic and Postclassic inscriptions, the deity
Itzamna Itzamna () is, in Maya mythology, an upper god and creator deity thought to reside in the sky. Itzamna is one of the most important gods in the Classic and Postclassic Maya pantheon. Although little is known about him, scattered references are ...
is frequently credited with bringing the knowledge of the calendrical system to the ancestral Maya, along with
writing Writing is a medium of human communication which involves the representation of a language through a system of physically inscribed, mechanically transferred, or digitally represented symbols. Writing systems do not themselves constitute h ...
in general and other foundational aspects of Mayan culture.


Overview

The Maya calendar consists of several cycles or ''counts'' of different lengths. The 260-day count is known to scholars as the '' Tzolkin'', or ''Tzolkʼin''. For details and notes on adoption among the
Mayanist A Mayanist ( es, mayista) is a scholar specialising in research and study of the Mesoamerican pre-Columbian Maya civilisation. This discipline should not be confused with Mayanism, a collection of New Age beliefs about the ancient Maya. May ...
community, see Kettunen & Helmke (2020), p. 7.
The Tzolkin was combined with a 365-day vague solar year known as the
Haabʼ The Haabʼ () is part of the Maya calendric system. It was a 365-day calendar used by many of the pre-Columbian cultures of Mesoamerica. Description The Haabʼ comprises eighteen months of twenty days each, plus an additional period of five da ...
to form a synchronized cycle lasting for 52 Haabʼ, called the ''
Calendar Round The Maya calendar is a system of calendars used in pre-Columbian Mesoamerica and in many modern communities in the Guatemalan highlands, Veracruz, Oaxaca and Chiapas, Mexico. The essentials of the Maya calendar are based upon a system which had ...
''. The Calendar Round is still in use by many groups in the Guatemalan highlands. A different calendar was used to track longer periods of time and for the inscription of
calendar date A calendar date is a reference to a particular day represented within a calendar system. The calendar date allows the specific day to be identified. The number of days between two dates may be calculated. For example, "25 " is ten days after "1 ...
s (i.e., identifying when one event occurred in relation to others). This is the ''
Long Count Long count or slow count is a term used in boxing. When a boxer is knocked down in a fight, the referee will count over them and the boxer must rise to their feet, unaided, by the count of ten or else deemed to have been knocked out. A long count ...
''. It is a count of days since a mythological starting-point. According to the correlation between the Long Count and Western calendars accepted by the great majority of Maya researchers (known as the Goodman-Martinez-Thompson, or GMT, correlation), this starting-point is equivalent to August 11, 3114 BC in the
proleptic Gregorian calendar The proleptic Gregorian calendar is produced by extending the Gregorian calendar backward to the dates preceding its official introduction in 1582. In nations that adopted the Gregorian calendar after its official and first introduction, dates occ ...
or September 6, in the
Julian calendar The Julian calendar, proposed by Roman consul Julius Caesar in 46 BC, was a reform of the Roman calendar. It took effect on , by edict. It was designed with the aid of Greek mathematicians and astronomers such as Sosigenes of Alexandri ...
(−3113 astronomical). The GMT correlation was chosen by John Eric Sydney Thompson in 1935 on the basis of earlier correlations by Joseph Goodman in 1905 (August 11), Juan Martínez Hernández in 1926 (August 12) and Thompson himself in 1927 (August 13). By its linear nature, the Long Count was capable of being extended to refer to any date far into the past or future. This calendar involved the use of a
positional notation Positional notation (or place-value notation, or positional numeral system) usually denotes the extension to any base of the Hindu–Arabic numeral system (or decimal system). More generally, a positional system is a numeral system in which th ...
system, in which each position signified an increasing multiple of the number of days. The Maya numeral system was essentially
vigesimal vigesimal () or base-20 (base-score) numeral system is based on twenty (in the same way in which the decimal numeral system is based on ten). '' Vigesimal'' is derived from the Latin adjective '' vicesimus'', meaning 'twentieth'. Places In a ...
(i.e., base-20) and each unit of a given position represented 20 times the unit of the position which preceded it. An important exception was made for the second-order place value, which instead represented 18 × 20, or 360 days, more closely approximating the solar year than would 20 × 20 = 400 days. The cycles of the Long Count are independent of the solar year. Many Maya Long Count inscriptions contain a
supplementary series The term supplementary can refer to: * Supplementary angles * Supplementary Benefit, a former benefit payable in the United Kingdom * Supplementary question A question time in a parliament occurs when members of the parliament ask questions of ...
, which provides information on the
lunar phase Concerning the lunar month of ~29.53 days as viewed from Earth, the lunar phase or Moon phase is the shape of the Moon's directly sunlit portion, which can be expressed quantitatively using areas or angles, or described qualitatively using the t ...
, number of the current
lunation In lunar calendars, a lunar month is the time between two successive syzygies of the same type: new moons or full moons. The precise definition varies, especially for the beginning of the month. Variations In Shona, Middle Eastern, and ...
in a series of six and which of the nine
Lords of the Night In Mesoamerican mythology the Lords of the Night ( nci, Yoalteuctin) are a set of nine gods who each ruled over every ninth night forming a calendrical cycle. Each lord was associated with a particular fortune, bad or good, that was an omen for ...
rules. Less-prevalent or poorly understood cycles, combinations and calendar progressions were also tracked. An ''819-day Count'' is attested in a few inscriptions. Repeating sets of 9 days (see below "Nine lords of the night") associated with different groups of
deities A deity or god is a supernatural being who is considered divine or sacred. The ''Oxford Dictionary of English'' defines deity as a god or goddess, or anything revered as divine. C. Scott Littleton defines a deity as "a being with powers greater ...
, animals and other significant concepts are also known.


Tzolkʼin

The ''
tzolkʼin Tzolkʼin (, formerly and commonly tzolkin) is the name bestowed by Mayanists on the 260-day Mesoamerican calendar originated by the Maya civilization of pre-Columbian Mesoamerica. The tzolkʼin, the basic cycle of the Maya calendar, is a preemi ...
'' (in modern Maya
orthography An orthography is a set of conventions for writing a language, including norms of spelling, hyphenation, capitalization, word breaks, emphasis, and punctuation. Most transnational languages in the modern period have a writing system, and ...
; also commonly written ''tzolkin'') is the name commonly employed by Mayanist researchers for the Maya Sacred Round or 260-day calendar. The word ''tzolkʼin'' is a
neologism A neologism Ancient_Greek.html"_;"title="_from_Ancient_Greek">Greek_νέο-_''néo''(="new")_and_λόγος_/''lógos''_meaning_"speech,_utterance"is_a_relatively_recent_or_isolated_term,_word,_or_phrase_that_may_be_in_the_process_of_entering_com ...
coined in
Yucatec Maya Yucatec Maya (; referred to by its speakers simply as Maya or as , is one of the 32 Mayan languages of the Mayan language family. Yucatec Maya is spoken in the Yucatán Peninsula and northern Belize. There is also a significant diasporic commu ...
, to mean "count of days" (Coe 1992). The various names of this calendar as used by precolumbian Maya people are still debated by scholars. The
Aztec The Aztecs () were a Mesoamerican culture that flourished in central Mexico in the post-classic period from 1300 to 1521. The Aztec people included different ethnic groups of central Mexico, particularly those groups who spoke the Nahuatl ...
calendar equivalent was called ''
Tōnalpōhualli The (), meaning "count of days" in Nahuatl, is a Mexica version of the 260-day calendar in use in pre-Columbian Mesoamerica. This calendar is solar and consists of 20 13-day () periods. Each is ruled by a different deity. Graphic representati ...
'', in the
Nahuatl Nahuatl (; ), Aztec, or Mexicano is a language or, by some definitions, a group of languages of the Uto-Aztecan language family. Varieties of Nahuatl are spoken by about Nahua peoples, most of whom live mainly in Central Mexico and have small ...
language. The tzolkʼin calendar combines twenty day names with the thirteen day numbers to produce 260 unique days. It is used to determine the time of religious and ceremonial events and for divination. Each successive day is numbered from 1 up to 13 and then starting again at 1. Separately from this, every day is given a name in sequence from a list of 20 day names: Some systems started the count with 1 Imix, followed by 2 Ikʼ, 3 Akʼbʼal, etc. up to 13 Bʼen. The day numbers then start again at 1 while the named-day sequence continues onwards, so the next days in the sequence are 1 Ix, 2 Men, 3 Kʼibʼ, 4 Kabʼan, 5 Etzʼnabʼ, 6 Kawak and 7 Ajaw. With all twenty named days used, these now began to repeat the cycle while the number sequence continues, so the next day after 7 Ajaw is 8 Imix. The repetition of these interlocking 13- and 20-day cycles therefore takes 260 days to complete (that is, for every possible combination of number/named day to occur once). The earliest known inscription with a Tzolkʼin is an Olmec earspool with 2 Ahau 3 Ceh - 6.3.10.9.0, September 2, -678 (Julian astronomical).


Haabʼ

The Haabʼ was made up of eighteen months of twenty days each plus a period of five days ("nameless days") at the end of the year known as ''Wayeb (or ''Uayeb'' in 16th-century orthography). The five days of Wayebʼ were thought to be a dangerous time. Foster (2002) writes, "During Wayeb, portals between the mortal realm and the Underworld dissolved. No boundaries prevented the ill-intending deities from causing disasters." To ward off these evil spirits, the Maya had customs and rituals they practiced during Wayebʼ. For example, people avoided leaving their houses and washing or combing their hair. Bricker (1982) estimates that the Haabʼ was first used around 550 BC with a starting point of the
winter solstice The winter solstice, also called the hibernal solstice, occurs when either of Earth's poles reaches its maximum tilt away from the Sun. This happens twice yearly, once in each hemisphere (Northern and Southern). For that hemisphere, the winter ...
. The Haabʼ month names are known today by their corresponding names in colonial-era
Yukatek Maya Yucatec Maya (; referred to by its speakers simply as Maya or as , is one of the 32 Mayan languages of the Mayan language family. Yucatec Maya is spoken in the Yucatán Peninsula and northern Belize. There is also a significant diasporic commu ...
, as transcribed by 16th-century sources (in particular,
Diego de Landa Diego de Landa Calderón, O.F.M. (12 November 1524 – 29 April 1579) was a Spanish Franciscan bishop of the Roman Catholic Archdiocese of Yucatán. Many historians criticize his campaign against idolatry. In particular, he burned almost a ...
and books such as the ''
Chilam Balam The Books of Chilam Balam () are handwritten, chiefly 17th and 18th-centuries Maya miscellanies, named after the small Yucatec towns where they were originally kept, and preserving important traditional knowledge in which indigenous Maya and early ...
'' of Chumayel). Phonemic analyses of Haabʼ glyph names in pre-Columbian Maya inscriptions have demonstrated that the names for these twenty-day periods varied considerably from region to region and from period to period, reflecting differences in the base language(s) and usage in the Classic and Postclassic eras predating their recording by Spanish sources. Each day in the Haabʼ calendar was identified by a day number in the month followed by the name of the month. Day numbers began with a glyph translated as the "seating of" a named month, which is usually regarded as day 0 of that month, although a minority treat it as day 20 of the month preceding the named month. In the latter case, the seating of Pop is day 5 of Wayebʼ. For the majority, the first day of the year was 0 Pop (the seating of Pop). This was followed by 1 Pop, 2 Pop as far as 19 Pop then 0 Wo, 1 Wo and so on. Because the Haabʼ had 365 days and the
tropical year A tropical year or solar year (or tropical period) is the time that the Sun takes to return to the same position in the sky of a celestial body of the Solar System such as the Earth, completing a full cycle of seasons; for example, the time ...
is 365.2422 days, the days of the Haabʼ did not coincide with the tropical year.


Calendar Round

A Calendar Round date is a date that gives both the Tzolkʼin and Haabʼ. This date will repeat after 52 Haabʼ years or 18,980 days, a Calendar Round. For example, the current creation started on 4 Ahau 8 Kumkʼu. When this date recurs it is known as a Calendar Round completion. Arithmetically, the duration of the Calendar Round is the
least common multiple In arithmetic and number theory, the least common multiple, lowest common multiple, or smallest common multiple of two integers ''a'' and ''b'', usually denoted by lcm(''a'', ''b''), is the smallest positive integer that is divisible by ...
of 260 and 365; 18,980 is 73 × 260 Tzolkʼin days and 52 × 365 Haabʼ days. Not every possible combination of Tzolkʼin and Haabʼ can occur. For Tzolkʼin days Imix, Kimi, Chuwen and Kibʼ, the Haabʼ day can only be 4, 9, 14 or 19; for Ikʼ, Manikʼ, Ebʼ and Kabʼan, the Haabʼ day can only be 0, 5, 10 or 15; for Akbʼalʼ, Lamat, Bʼen and Etzʼnabʼ, the Haabʼ day can only be 1, 6, 11 or 16; for Kʼan, Muluk, Ix and Kawak, the Haabʼ day can only be 2, 7, 12 or 17; and for Chikchan, Ok, Men and Ajaw, the Haabʼ day can only be 3, 8, 13 or 18.


Year Bearer

A "Year Bearer" is a
Tzolkʼin Tzolkʼin (, formerly and commonly tzolkin) is the name bestowed by Mayanists on the 260-day Mesoamerican calendar originated by the Maya civilization of pre-Columbian Mesoamerica. The tzolkʼin, the basic cycle of the Maya calendar, is a preemi ...
day name that occurs on 0Pop, the first day of the
Haabʼ The Haabʼ () is part of the Maya calendric system. It was a 365-day calendar used by many of the pre-Columbian cultures of Mesoamerica. Description The Haabʼ comprises eighteen months of twenty days each, plus an additional period of five da ...
. Since there are 20 Tzolkʼin day names, 365 days in the Haabʼ, and the remainder of 365 divided by 20 is 5 (), the Tzolkʼin day name for each successive 0Pop will be 5 later in the cycle of Tzolk'in day names. Similarly, since there are 13 Tzolk'in day numbers, and the remainder of 365 divided by 13 is 1 (), the Tzolk'in day number for each successive 0Pop will be 1 greater than before. As such, the sequence of Tzolk'in dates corresponding to the Haab' date 0Pop are as follows: Thus, the Year Bearers are the four Tzolkʼin day names that appear in this sequence: Ik', Manik', Eb', and Kab'an. "Year Bearer" literally translates a Mayan concept. Its importance resides in two facts. For one, the four years headed by the Year Bearers are named after them and share their characteristics; therefore, they also have their own prognostications and patron deities. Moreover, since the Year Bearers are geographically identified with boundary markers or mountains, they help define the local community. The classic system of Year Bearers described above is found at Tikal and in the
Dresden Codex The ''Dresden Codex'' is a Maya book, which was believed to be the oldest surviving book written in the Americas, dating to the 11th or 12th century. However, in September 2018 it was proven that the Maya Codex of Mexico, previously known as t ...
. During the Late Classic period a different set of Year Bearers was in use in Campeche. In this system, the Year Bearers were the
Tzolkʼin Tzolkʼin (, formerly and commonly tzolkin) is the name bestowed by Mayanists on the 260-day Mesoamerican calendar originated by the Maya civilization of pre-Columbian Mesoamerica. The tzolkʼin, the basic cycle of the Maya calendar, is a preemi ...
that coincided with 1 Pop. These were Akʼbʼal, Lamat, Bʼen and Edznab. During the Post-Classic period in Yucatán a third system was in use. In this system the Year Bearers were the days that coincided with 2 Pop: Kʼan, Muluc, Ix and Kawak. This system is found in the Chronicle of Oxkutzcab. In addition, just before the Spanish conquest in Mayapan the Maya began to number the days of the Haabʼ from 1 to 20. In this system the Year Bearers are the same as in the 1 Pop – Campeche system. The Classic Year Bearer system is still in use in the Guatemalan highlands and in Veracruz, Oaxaca and Chiapas, Mexico.Miles, Susanna W, "An Analysis of the Modern Middle American Calendars: A Study in Conservation." In Acculturation in the Americas. Edited by Sol Tax, pp. 273–84. Chicago: University of Chicago Press, 1952.


Long Count

Since Calendar Round dates repeat every 18,980 days, approximately 52 solar years, the cycle repeats roughly once each lifetime, so a more refined method of dating was needed if history was to be recorded accurately. To specify dates over periods longer than 52 years, Mesoamericans used the Long Count calendar. The Maya name for a day was ''kʼin''. Twenty of these kʼins are known as a ''winal'' or ''uinal''. Eighteen winals make one ''tun''. Twenty tuns are known as a ''kʼatun''. Twenty kʼatuns make a ''bʼakʼtun''. The Long Count calendar identifies a date by counting the number of days from the Mayan creation date 4 Ahaw, 8 Kumkʼu (August 11, 3114 BC in the
proleptic Gregorian calendar The proleptic Gregorian calendar is produced by extending the Gregorian calendar backward to the dates preceding its official introduction in 1582. In nations that adopted the Gregorian calendar after its official and first introduction, dates occ ...
or September 6 in the
Julian calendar The Julian calendar, proposed by Roman consul Julius Caesar in 46 BC, was a reform of the Roman calendar. It took effect on , by edict. It was designed with the aid of Greek mathematicians and astronomers such as Sosigenes of Alexandri ...
-3113 astronomical dating). But instead of using a base-10 (
decimal The decimal numeral system (also called the base-ten positional numeral system and denary or decanary) is the standard system for denoting integer and non-integer numbers. It is the extension to non-integer numbers of the Hindu–Arabic numeral ...
) scheme, the Long Count days were tallied in a modified base-20 scheme. Thus 0.0.0.1.5 is equal to 25 and 0.0.0.2.0 is equal to 40. As the winal unit resets after only counting to 18, the Long Count consistently uses base-20 only if the tun is considered the primary unit of measurement, not the kʼin; with the kʼin and winal units being the number of days in the tun. The Long Count 0.0.1.0.0 represents 360 days, rather than the 400 in a purely base-20 (
vigesimal vigesimal () or base-20 (base-score) numeral system is based on twenty (in the same way in which the decimal numeral system is based on ten). '' Vigesimal'' is derived from the Latin adjective '' vicesimus'', meaning 'twentieth'. Places In a ...
) count. There are also four rarely used higher-order cycles: piktun, kalabtun, kʼinchiltun, and alautun. Since the Long Count dates are unambiguous, the Long Count was particularly well suited to use on monuments. The monumental inscriptions would not only include the 5 digits of the Long Count, but would also include the two tzolkʼin characters followed by the two haabʼ characters. Misinterpretation of the
Mesoamerican Long Count calendar The Mesoamerican Long Count calendar is a non-repeating, vigesimal (base 20) and octodecimal (base 18) calendar used by several pre-Columbian Mesoamerican cultures, most notably the Maya. For this reason, it is often known as the May ...
was the basis for a popular belief that a cataclysm would take place on December 21, 2012. December 21, 2012 was simply the day that the calendar went to the next
bʼakʼtun A baktun (properly bʼakʼtun ) is 20 ''kʼatun'' cycles of the ancient Maya Long Count Calendar. It contains 144,000 days, equal to 394.26 tropical years. The Classic period of Maya civilization occurred during the 8th and 9th baktuns of the cu ...
, at Long Count 13.0.0.0.0. The date of the start of the next b'ak'tun (Long Count 14.0.0.0.0) is March 26, 2407. The date of the start of the next piktun (a complete series of 20 bʼakʼtuns), at Long Count 1.0.0.0.0.0, is October 13, 4772.


Supplementary Series

Many Classic period inscriptions include a series of glyphs known as the Supplementary Series. The operation of this series was largely worked out by
John E. Teeple John Edgar Teeple (January 4, 1874 – March 23, 1931) was an American chemical engineer who served as President of The Chemists' Club from 1921-1922 and received the Perkin Medal in 1927 for his work on potash during World War I. He was also a ...
. The Supplementary Series most commonly consists of the following elements:


Lords of the Night

Each night was ruled by one of the nine lords of the underworld. This nine-day cycle was usually written as two glyphs: a glyph that referred to the Nine Lords as a group, followed by a glyph for the lord that would rule the next night.


Lunar Series

A lunar series generally is written as five glyphs that provide information about the current
lunation In lunar calendars, a lunar month is the time between two successive syzygies of the same type: new moons or full moons. The precise definition varies, especially for the beginning of the month. Variations In Shona, Middle Eastern, and ...
, the number of the lunation in a series of six, the current ruling lunar deity and the length of the current lunation.


Moon age

The Maya counted the number of days in the current lunation. They used two systems for the zero date of the lunar cycle: either the first night they could see the thin crescent moon or the first morning when they could not see the waning moon. The age of the moon was depicted by a set of glyphs that mayanists coined glyphs D and E: * A new moon glyph was used for day zero in the lunar cycle. * D glyphs were used for lunar ages for days 1 through 19, with the number of days that had passed from the new moon. * For lunar ages 20 to 30, an E glyph was used, with the number of days from 20.


Count of Lunations

The Maya counted the lunations. This cycle appears in the lunar series as two glyphs that modern scholars call the 'C' and 'X' glyphs. The C glyph could be prefixed with a number indicating the lunation. No prefixing number meant one, whereas the numbers two through six indicated the other lunations. There was also a part of the C glyph that indicated where this fell in a larger cycle of 18 lunations. Accompanying the C glyph was the 'X' glyph that showed a similar pattern of 18 lunations.


Lunation length

The present era lunar synodic period is about 29.5305877 mean solar days or about 29 days 12 hours 44 minutes and 2+7/9 seconds. As a whole number, the number of days per lunation will be either 29 or 30 days, with the 30-day intervals necessarily occurring slightly more frequently than the 29-day intervals. The Maya wrote whether the lunar month was 29 or 30 days as two glyphs: a glyph for lunation length followed by either a glyph made up of a moon glyph over a bundle with a suffix of 9 for a 29-day lunation or a moon glyph with a suffix of 10 for a 30-day lunation. Since the Maya didn't use fractions, lunations were approximated by using the formula that there were 149 lunations completed in 4400 days, which yielded a rather short mean month of exactly 4400/149 = 29+79/149 days = 29 days 12 hours 43 minutes and 29+59/149 seconds, or about 29.5302 days.


819-day count

Some Mayan monuments include glyphs that record an 819-day count in their Initial Series. These can also be found in the
Dresden codex The ''Dresden Codex'' is a Maya book, which was believed to be the oldest surviving book written in the Americas, dating to the 11th or 12th century. However, in September 2018 it was proven that the Maya Codex of Mexico, previously known as t ...
. This is described in Thompson. More examples of this can be found in Kelley. Each group of 819 days was associated with one of four colors and the cardinal direction with which it was associated black corresponded to west, red to east, white to north and yellow to south. The 819-day count can be described several ways: Most of these are referred to using a "Y" glyph and a number. Many also have a glyph for Kʼawill the god with a smoking mirror in his head. Kʼawill has been suggested as having a link to Jupiter. In the
Dresden codex The ''Dresden Codex'' is a Maya book, which was believed to be the oldest surviving book written in the Americas, dating to the 11th or 12th century. However, in September 2018 it was proven that the Maya Codex of Mexico, previously known as t ...
almanac 59 there are
Chaac Chaac (also spelled Chac or, in Classic Mayan, Chaahk ) is the name of the Maya god of rain, thunder, and lighting. With his lightning axe, Chaac strikes the clouds, causing them to produce thunder and rain. Chaac corresponds to Tlaloc among ...
s of the four colors. The accompanying texts begin with a directional glyph and a verb for 819-day-count phrases. Anderson provides a detailed description of the 819-day count.


Short count

During the late Classic period the Maya began to use an abbreviated short count instead of the Long Count. An example of this can be found on altar 14 at Tikal. In the kingdoms of Postclassic Yucatán, the Short Count was used instead of the Long Count. The cyclical Short Count is a count of 13 kʼatuns (or 260 tuns), in which each kʼatun was named after its concluding day, Ahau ('Lord'). 1 Imix was selected as the recurrent 'first day' of the cycle, corresponding to 1
Cipactli Cipactli ( nci, Cipactli "crocodile" or "caiman") was the first day of the Aztec divinatory count of 13 X 20 days (the '' tonalpohualli'') and ''Cipactonal'' "Sign of Cipactli" was considered to have been the first diviner. In Aztec cosmology, the ...
in the Aztec day count. The cycle was counted from katun 11 Ahau to katun 13 Ahau. Since a katun is days long, and the remainder of 7200 divided by 13 is 11 (), the day number of the concluding day of each successive katun is 9 greater than before (wrapping around at 13, since only 13 day numbers are used). That is, starting with the katun that begins with 1Imix, the sequence of concluding day numbers is 11, 9, 7, 5, 3, 1, 12, 10, 8, 6, 4, 2, 13, 11, ..., all named Ahau. The concluding day 13 Ahau was followed by the re-entering first day 1 Imix. This is the system as found in the colonial Books of
Chilam Balam The Books of Chilam Balam () are handwritten, chiefly 17th and 18th-centuries Maya miscellanies, named after the small Yucatec towns where they were originally kept, and preserving important traditional knowledge in which indigenous Maya and early ...
. In characteristic Mesoamerican fashion, these books project the cycle onto the landscape, with 13 ''Ahauob'' 'Lordships' dividing the land of Yucatán into 13 'kingdoms'.Roys 1967: 132, 184–185


See also

*
2012 phenomenon The 2012 phenomenon was a range of eschatological beliefs that cataclysmic or transformative events would occur on or around 21 December 2012. This date was regarded as the end-date of a 5,126-year-long cycle in the Mesoamerican Long Count cal ...
*
Maya religion The traditional Maya or Mayan religion of the extant Maya peoples of Guatemala, Belize, western Honduras, and the Tabasco, Chiapas, Quintana Roo, Campeche and Yucatán states of Mexico is part of the wider frame of Mesoamerican religion. As is ...
*
Mayanism Mayanism is a non-codified eclectic collection of New Age beliefs, influenced in part by Pre-Columbian Maya mythology and some folk beliefs of the modern Maya peoples. Contemporary Mayanism places less emphasis on contacts between the ancient ...
* Tres Zapotes#Stela C * Maya Astronomy * Aztec calendar


Notes


References

* * * * * * * * * * * * * * * * Rice, Prudence M., ''Maya Calendar Origins: Monuments, Mythistory, and the Materialization of Time'' (Austin, TX: University of Texas Press, 2007) . * * * * * * * * * * *


External links

1897 text by Cyrus Thomas
date converter at FAMSI
This converter uses the Julian/Gregorian calendar and includes the 819 day cycle and lunar age.

{{Authority control Ancient astronomy Astrology by tradition Obsolete calendars Ancient calendars