Tzolk'in (in the revised Guatemala Mayan languages Academy orthography, which is preferred by the summer institute of linguistics' linguists, formerly and commonly tzolkin) is the name bestowed by Mayanists on the 260-day Mesoamerican calendar used by the Maya civilization of pre-Columbian Mesoamerica.

The tzolk'in, the basic cycle of the Maya calendar, is a pre-eminent component in the society and rituals of the ancient and the modern Maya. The Tzolk'in is still in use by several Maya communities in the Guatemalan highlands. Its use is marginal but spreading in this region, although opposition from Evangelical Christian converts continues in some communities.

The word, meaning "division of days", is a western invention coined in Yukatek Maya. The corresponding words used by the K'iche' and Kaqchikel peoples of Guatemala, which have maintained an unbroken count for over 500 years, are, respectively, Aj Ilabal Q’ij 'the sense of the day' and Chol Q'ij, 'the organization of time'. The actual names of this calendar as used by the pre-Columbian Maya are not widely known. The corresponding Postclassic Aztec calendar, was called tonalpohualli, in the Nahuatl language.

Tzolk'in table of named days

The tzolk'in calendar combines a cycle of twenty named days with another cycle of thirteen numbers (the trecena), to produce 260 unique days (i.e., 20 × 13 = 260). Each successive named day was numbered from 1 up to 13 and then starting again at 1. There were 20 individual named days, as shown in the table below:

glyphs]] (in sequence)

Seq. No. 1	Day Name 2	Inscription glyph example 3	Codex glyph example 4	16th C. Yucatec 5	Reconstructed Classic Maya 6	Associated natural phenomena or meaning 7
01	Imix'			Imix	Imix (?) / Ha' (?)	waterlily, crocodile
02	Ik'			Ik	Ik'	wind, breath, life force
03	Ak'b'al			Akbal	Ak'b'al (?)	darkness, night, early dawn
04	K'an			Kan	K'an (?)	ripe(ness), maize
05	Chikchan			Chicchan	(unknown)	cosmological snake
06	Kimi			Cimi	Cham (?)	death
07	Manik'			Manik	Manich' (?)	deer
08	Lamat			Lamat	Ek' (?)	Venus, star
09	Muluk			Muluc	(unknown)	jade, water, offering
10	Ok			Oc	(unknown)	dog
11	Chuwen			Chuen	(unknown)	howler monkey
12	Eb'			Eb	(unknown)	rain
13	B'en			Ben	(unknown)	green/young maize, seed
14	Ix			Ix	Hix (?)	jaguar
15	Men			Men	(unknown)	eagle
16	Kib'			Cib	(unknown)	wax
17	Kab'an			Caban	Chab' (?)	earth
18	Etz'nab'			Etznab	(unknown)	flint
19	Kawak			Cauac	(unknown)	rain storm
20	Ajaw			Ahau	Ajaw	lord, ruler, sun
NOTES: 1. the sequence number of the named day in the Tzolk'in calendar 2. Day name, in the standardised and revised orthography of the Guatemalan Academia de Lenguas Mayas 3. An example glyph (logogram) for the named day, typical of monumental inscriptions ("cartouche" version). Note that for most of these several alternate forms also exist. 4. Example glyph, Maya codex style. When drawn or painted, most often a more economical style was employed; the meaning is the same. Again, variations to codex-style glyphs also exist. 5. Day name, as recorded from 16th century Yucatec language accounts, according to Diego de Landa; this orthography has (until recently) been widely used 6. In most cases, the actual day name as spoken in the time of the Classic Period (c. 200-900) when most inscriptions were made is not known. The versions given here (in Classical Maya, the main language of the inscriptions) are reconstructed based on phonological comparisons; a '?' symbol indicates the reconstruction is tentative. 7. Each named day had a common association or identification with particular natural phenomena

The Tzolkin does not have a generally-recognized start and end, although there are specific references in the books of Chilam Balam to ! Imix as the beginning day. Following is a list of the days beginning with I Imix:

• 1 Imix is the first day of the Tzolkin.
• 2 Ik
• 3 Akbal
• 4 Kan
• 5 Chicchan
• 6 Cimi
• 7 Manik
• 8 Lamat
• 9 Muluc
• 10 Oc
• 11 Chuen
• 12 Eb
• 13 Ben is the 13th day of the Tzolkin
• 1 Ix is the 14th day of the Tzolkin
• 2 Men
• 3 Cib
• 4 Cabab
• 5 Eznab
• 6 Cauac
• 7 Ahau
• 8 Imix
• 9 Ik
• 10 Akbal
• 11 Kan

...

• 9 Cib
• 10 Cabab
• 11 Eznab
• 12 Cauac
• 13 Ahau is the 260th day of the Tzolkin.

Meanings

Each of the twenty days is linked to a different god in Mayan mythology

• Imix : 'Crocodile' - the reptilian body of the planet earth, or world
• Ik : 'Wind' - breath, life. Also violence.
• Akbal : 'Night-house' - darkness, the underworld, realm of the nocturnal jaguar-sun.
• Kan : 'Maize' - sign of the young maize lord who brings abundance, ripeness. Also lizard, net.
• Chicchan : 'Snake' - the celestial serpent
• Cimi : 'Death'
• Manik : 'Deer' - sign of the Lord of the Hunt
• Lamat : 'Rabbit' - sign of the planet Venus, sunset.
• Muluc : 'Water' - symbolised by jade, an aspect of the water deities, fish
• Oc : 'Dog' - who guides the night sun through the underworld.
• Chuen : 'Monkey' - the great craftsman, patron of arts and knowledge. Also thread.
• Eb : 'Grass' or 'Point' - associated with rain and storms.
• Ben : 'Reed' - who fosters the growth of corn, cane, and man.
• Ix : 'Jaguar' - the night sun. Also maize.
• Men : 'Eagle' - the wise one, bird, moon
• Cib : 'Owl/Vulture' - death-birds of night and day. Also wax, soul, insect.
• Caben : 'Earthquake' - formidable power. Also season, thought.
• Etz'nab : 'Knife' - the obsidian sacrificial blade.
• Cauac : 'Rain' or 'Storm' - the celestial dragon serpents and the chacs, gods of thunder and lightning.
• Ahau : 'Lord' - the radiant sun god

Uses

The Tzolk'in was extensively used in Mayan inscriptions and codices. Symbolism related to the Tzolk'in is also observed in the Popol Vuh (which, though written in the early post-conquest period, is probably based on older texts). For instance, when Ixbalanque has set an impossible task for Ix Quic of collecting a netful of corn from one stalk and Ix Quic successfully completes it, she leaves the imprint of her net in the ground, and the day "net" is the opening of the Venus cycle which follows "ahau" ("ajpu" in K'iche'), just as her child is the heir of Hun Hunajpu.

The uses to which the ancient Maya applied the calendar are unknown, nonetheless modern Maya comunities employ the calendar as follows:

• For Maize cultivation.(The zenith transit days may have been significant for agriculture along the south coast of Guatemala because April 30 it occurs just before the rainy season. Modern Maya plant their corn at the end of April or early in May. In the August 13 zenith transit the Maya initiate its current era in this day', approximating the harvest of the dried corn.
• For modern Guatemalan highlanders, the 260 days are employed in training the Aj K'ij, or 'calendar diviner'. Nine months after commencing training in divination, the novice is "reborn" and initiated into office.
• For rituals performed every 260 days. Most famous of thes is the "Initiation" celebration of 8 Chuwen, Waxakib' B'atz, in K'ice.
• For days which are suitable for certain actions. For instance, a low-numbered Ak'ab'al or B'en would be a good day for a wedding, whereas K'an would be a good day for building or maintaining a house.
• For divination based on casting lots and counting forward through the calendar from the current 'year bearer' to arrive at a day which is then interpreted. This is not pure cleromancy because somatic twitches of "blood lightning" can either be specifically consulted or arise spontaneously during the process.
• For traditional Mayan names, which are based on calendar days, often birthdays. As in astrology, personal characteristics are associated with birthdays (see Mayan astrology for details).

New Age Movement: The "Dreamspell" and "Ascension"

The Tzolk'in is the basis for the modern, New Age invention of the "Dreamspell" calendar, developed by the esoteric author Jose Arguelles. The Dreamspell calendar is sometimes mistakenly identified as an authentic interpretation or extension of the original Maya calendar, although Arguelles himself acknowledges the Dreamspell calendar is a new and syncretic creation, inspired by elements from mesoamerican and non-mesoamerican sources.

In 1987, before the Harmonic Convergence, inspired by a single paragraph of Dr. Arguelles book "The Mayan Factor" (wherein he refers to each day as a "tone"), singer/songwriter and sound healer, Alyras (aka Mirai), translated the Tzolk'in's harmonic values into sound, with the tutelage of Barbara Hero.Eschewing extensions of the Tzolk'in, Alyras opted for strict mathematical adherence to the Tzolk'in's fundamental structure and sequences, in order to present a truly authentic sonic expression of its inner workings. (See "Ascension: The Tzolk'in Series" and "The Radiant Tzolk'in" for both audio and audiovisual expressions of the Tzolk'in, respectively).

Origins and purpose

The 260-day calendar spread throughout the Mesoamerican cultural region, and it is regarded as being the oldest and most important of the calendar systems attested in the region, with an origin pre-dating its first appearances in Maya inscriptions. . It is uncertain which Mesoamerican culture first developed this calendar. Stelae with the earliest known Long Count dates come from this general area. Some of the oldest calendric inscriptions are from early strata of Zapotec in the Oaxacan highlands at sites such as Monte Albán, dating from mid 1st-millennium BCE. A few earlier-dated inscriptions and artifacts have what appear to be calendric glyphs, such as at San José Mogote and in the Olmec Gulf Coast region. However, either the dating method or the calendric nature of the glyphs are disputed by scholars.

The original purpose of such a calendar, with no obvious relation to any astronomical or geophysical cycle, is not securely known, but there are several theories. One theory is that the calendar came from mathematical operations based on the numbers thirteen and twenty, which were important numbers to the Maya, (Thompson 1950: An Introduction to Maya Hieroglyphic Writing). The number twenty was the basis of the Maya counting system, taken from the total number of human digits. (See Maya numerals). Thirteen symbolized the number of levels in the Upperworld where the gods lived, and is also cited by modern daykeepers as the number of "joints" in the human body (ankles, knees, hips, shoulders, elbows, wrists, and neck). The numbers multiplied together equal 260.

Barbara Tedlock, studied this system in the contemporary K'iche Maya community of the municipality of Momostenango in highland Guatemala. She underwent a formal apprenticeship in calendar divination with a local adept, and was initiated as a diviner in 1976. She says: "The Momostecan calendar embraces both the 260-day cycle and the 365-day solar year, with the four Classic Maya Year-bearers, or Mam, systematically linking the two. The 260-day cycle is conceived as linked firmly to worldly or earthly affairs, mirroring no astronomical period but rather the period of human gestation. Past ethnographic accounts of this cycle contain various conflicting opinions as to what its first day is, but a comparison of the present results and those of previous studies indicates that there is no fixed first day."

Anthony Aveni seerts, "Once a Maya genius may have recognized that somewhere deep within the calendar system lay the miraculous union, the magical crossing point of a host of time cycles: 9 moons, 13 times 20, a birth cycle, a planting cycle, a Venus cycle, a sun cycle, an eclipse cycle. The number 260 was tailor made for the Maya". Others have observed that the "Venus Table" in the Dresden Codex, is an accurate ephemeris for predicting Venus positions. Others have also observed a basis for the 260 day cycle in the agricultural cycle of highland Guatemala, which is also about 260 days. There may also be a relation to the average length of time it takes between appearances of the planet Venus as morning or evening star, which is in round numbers 263 days. Aveni notes that "the average duration between successive halves of the eclipse season, at 173 ½ days, fits into the tzolkin in the ratio of 3 to 2." This may seem contrived, but the Maya did employ the tzolkin to predict positions of Venus and eclipses.

Another theory is that the 260-day period is the length of human pregnancy. This is close to the average number of days between the first missed menstrual period and birth, unlike Naegele's rule which is 40 weeks (280 days) between the last menstrual period and birth. It is postulated that midwives originally developed the calendar to predict babies' expected birth dates.

Vincent Malmström identify a correlation between the 260-day cycle and the 260-day gap between zenith and transits of the sun. According to this hypothesis, the 260-day cycle originated in the narrow latitudinal band (14º42'N to 15ºN) in which the sun is vertically overhead about 12-13 August and again 260 days later about 30 April-l May (Malmström identifies the proto-Classic Izapan culture as one suitable candidate at this latitude). This period may have been used for the planting schedule of maize. However, others object to this conception, noting that while the 260-day calendar runs continuously the interval between autumn-spring and spring-autumn positions alternates between 260 and 105 days, and that the earliest-known calendric inscriptions are from considerably further north of this zone. Consequently this theory is not widely supported.

It is of course also possible that the number 260 has multiple sources.

See also

• Maya calendar
• Maya calendrical divination
• Maya script
• Haab'
• Mesoamerican calendars
• Tonalpohualli

Notes

1. The modern orthography and reconstructed Classic Maya names in the table follow the summary provided in Kettunen and Helmke (2005). The associations are based on Miller and Taube (1993), p.49.
2. The particular associations given below are based on Wright (1989).
3. Dennis Tedlock (translator and editor), "Popol Vuh: The Definitive Edition Of The Mayan Book Of The Dawn Of Life", 1996
4. Miller and Taube (1993), pp.48–50.
5. See Lo's summary at Mesomerican Writing Systems (n.d.).
6. Tedlock (1982, pp.174–177).
7. Aveni (2000, p.202).
8. Aveni (2000, p.201).
9. See for e.g. Miller and Taube (1993, pp.46, 48.)
10. Malmström (1973), Zelia Nuttall (1928) and Ola Apenes (1936).
11. . See for example the separate review comments to Malmström's 1973 paper by John Henderson and Arthur Fitchett and their associated citations, appearing in 9 August 1974 edition of Science ( reprinted (PDF).

References

External links

• Maya Calendar with Names and color Glyphs
• Maya Calendar Round (CR) made of two parts: Ritual (Tzolk'in) Calendar and the Haab
• "Essentials of the Mayan Sacred Calendar", elaborating on the fundamentals of the Music of the Tzolk'in.