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Mayan Calendar · Day sign 10 of 20

Tz'i', the dog and the sense of justice

Tz'i' is the tenth day sign of the 260-day count: Tz'i' in K'iche' and Ok in Yucatec, both the dog. The highland daykeepers move from the animal to the law and make Tz'i' the nawal of justice, material and spiritual.

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The Maya day sign Tz'i' as the codices write it, drawn after Sylvanus Morley's figure of 1915, beside the words Tz'i', Ok in Yucatec, Dog, day sign 10 of 20. Tz'i' Ok in Yucatec · Dog Day sign 10 of 20 With each of the 13 numbers Glyph after Morley, 1915
Tz'i' (Ok), the tenth day sign: our tracing of the codex form in Morley's Introduction to the Study of the Maya Hieroglyphs (1915, figure 17), which is in the public domain. The day signs are not yet in Unicode.

Facts

Position
Day sign 10 of 20; days 10, 30, 50 … 250 of the 260
K'iche' name
Tz'i', in the 1987 unified alphabet
Yucatec name
Ok; colonial spelling Oc
Our English gloss
Dog (ours, from the highland reading)
The Yucatec name means
dog
Classic reading of the glyph
Ook? (a question mark: not secure)
Year bearer
Never, in any known set
First day in the count
10 Tz'i', day 10 of the 260
Glyph
Our tracing of Morley 1915, figure 17; not yet in Unicode

Meaning

The Classic glyph shows a dog, and its reading is probably ook. Thompson gave the day to the dog of the underworld and recorded the Yucatec meaning as entering the underworld.

The K'iche' name Tz'i' is the dog, and the highland reading moves from the animal to the law. The Komon Tohil daykeepers call it the nawal of material and spiritual justice and the day of the five senses; the Maya' Wuj manual makes it justice, order and exactness.

Our reading: loyalty, guidance and a sharp sense of right and wrong that can tip into suspicion. People born on Tz'i' are described as loyal and principled. The words are ours.

In the highlands today

In Zunil the day is used to ask that want, misfortune and bad habits stay away and to be free of criticism and rumour; Maya' Wuj makes it the day for settling matters of justice.

Andrés Xiloj spoke of 7 Tz'i', the day before 8 B'atz', as a day on which one must not shame oneself in word or deed, and on which the Momostenango daykeepers already offer incense and flowers.

The glyph and the old readings

Thompson's tables record the dog as the day's association in Yucatan and the highlands, with an old augury of the adulterer in both; such gradings differ between communities and we read none of them as a fortune. Tz'i' is never a year bearer.

The Central Mexican day of the same position is Itzcuintli, the dog. Western pages that make Tz'i' the guide of the sun through the underworld are glossing it, not citing a source.

In the count

Tz'i' comes round every twentieth day, thirteen times in the 260: on days 10, 30, 50, 70, 90, 110, 130, 150, 170, 190, 210, 230 and 250, with the numbers 10, 4, 11, 5, 12, 6, 13, 7, 1, 8, 2, 9 and 3 in that order, so 10 Tz'i' is its first day in the count and 3 Tz'i' its last. In the nawal cross of a person born on Tz'i', the day eight before (conception) falls on Iq', the day eight after (destiny) on Tijax, six before (the right hand) on K'at and six after (the left hand) on Ajmaq, each with its own number.

Correspondences

Each item with how it stands: “sourced” is in the work cited, “our construction” is EsoTerrier’s own, and “disputed” means the sources disagree.

Thompson's reading of the glyph (1950)
dog sourced
Presiding god of the day, after Thompson
the dog of the underworld sourced
Old augury, Yucatan and the highlands, after Thompson
dog, adulterer (Yucatan and highlands); gradings differ between communities disputed
The name, as the Zunil daykeepers explain it
dog; the five senses; the nawal of material and spiritual justice sourced
Direction and colour
north, white (sak): read off the four-direction cycle; not attested for this day itself, and not shown on our chart unverified
Our reading
Loyalty, guidance and justice: principled, with a sharp sense of right and wrong that can tip into suspicion. our construction

How the schools read it

Classic inscriptions (epigraphers)
Reading of the glyph: Ook?
J. Eric S. Thompson, 1950
The glyph as dog; the day's god the dog of the underworld.
Komon Tohil daykeepers, Zunil
Dog; the five senses; the nawal of material and spiritual justice.
The Maya' Wuj manual
Justice; the reading of the known and the unknown; protector of material and spiritual law, order and exactness; a day for matters of justice.
Momostenango (Andrés Xiloj, 2005)
A day on which one must not shame oneself in word or deed.
The Central Mexican count (tonalpohualli)
Itzcuintli, dog: the day of the same position in a related but different count.
Dreamspell (1990)
"White Dog" for the same position in its own count; not our name for the sign.
EsoTerrier
Loyalty, guidance and justice: principled, with a sharp sense of right and wrong that can tip into suspicion. Our words.

Claims about it

  • Tz'i' is the "White Dog".

    false

    What the record shows: That is a Dreamspell name from a modern count of 1990, which gives most dates a different sign.

  • Tz'i' has its own colour, guardian animal and list of suitable jobs.

    unverified

    What the record shows: No Maya source gives these; they come from Western sites and apps.

  • Tz'i' means the same everywhere.

    disputed

    What the record shows: The Classic dog of the underworld and the highland nawal of justice are readings of different places and periods.

Elsewhere on EsoTerrier

Sources

Primary texts (6)
  1. Komon Tohil (K'iche' daykeepers, Zunil); Smithsonian NMAI, The Meaning of the Days in the Maya Sacred Calendar. maya.nmai.si.edu, 2012. Consulted for facts; never copied. maya.nmai.si.edu/sites/default/files/resources/The%20Meaning%20of%20the%20Days%20in%20the%20Maya%20Sacred%20Calendar.pdf
  2. Editorial Maya' Wuj, Usolik rokisaxik ri Cholq'ij, ri Ab' / Manual de los calendarios mayas Cholq'ij y Ab' (manual for the 2025 to 2026 wall calendar). Editorial Maya' Wuj, Guatemala, 2025. Consulted for facts; never copied. mayawuj.com.gt/wp-content/uploads/2025/04/Instructivo-rueda-calendarica-de-pared-2025-2026.pdf
  3. Mayatecum, ¿Cuál es el verdadero día del año nuevo maya solar?. mayatecum.com, 2024. Facts only. mayatecum.com/cual-es-el-verdadero-dia-del-anyo-nuevo-maya-solar
  4. Sylvanus Griswold Morley, An Introduction to the Study of the Maya Hieroglyphs. Bureau of American Ethnology, Washington, 1915. Public domain (a US government publication); our day-sign glyphs are traced from its figure 17. gutenberg.org/files/43491/43491-h/43491-h.htm
  5. J. Eric S. Thompson, Maya Hieroglyphic Writing: Introduction. Carnegie Institution of Washington, Publication 589, 1950 (reprinted 1960 and 1971). Facts and short attributed phrases only. mesoweb.com/publications/Thompson/Thompson1950.html
  6. Andres Xiloj; translation and notes by Allen J. Christenson; Night Fire Films, Breaking the Maya Code: interview with Andres Xiloj, K'iche' daykeeper of Momostenango (12 February 2005), transcript. Night Fire Films, 2005. Facts only; paraphrased, not quoted. nightfirefilms.org/breakingthemayacode/interviews/XilojTRANSCRIPT.pdf
Studies and other sources (8)
  1. "Maya calendar", Wikipedia (orientation only). en.wikipedia.org/wiki/Maya_calendar
  2. "Tzolk'in", Wikipedia (orientation only). en.wikipedia.org/wiki/Tzolk%CA%BCin
  3. "Dreamspell", Wikipedia (orientation only). en.wikipedia.org/wiki/Dreamspell
  4. Academia de Lenguas Mayas de Guatemala, Academia de Lenguas Mayas de Guatemala: history, and Government Accord 1046-87 (unified alphabets). almg.org.gt, 2026. Facts only. almg.org.gt/historia
  5. Script Encoding Initiative, UC Berkeley, Script Encoding Initiative: 'From Stone to Screen' (30 December 2025) and 'SEI in 2026' (24 February 2026). sei.berkeley.edu, 2026. Facts only. sei.berkeley.edu/2025/12/30/from-stone-to-screen
  6. Harri Kettunen and Christophe Helmke, Introduction to Maya Hieroglyphs, 20th edition. Wayeb (European Association of Mayanists), 2025. Facts only. wayeb.org/wp-content/uploads/2025/11/Kettunen_Helmke_2025_WH_English_20th_ed.pdf
  7. "Tonalpohualli", Wikipedia (orientation only). en.wikipedia.org/wiki/T%C5%8Dnalp%C5%8Dhualli
  8. Nicholas A. Hopkins and J. Kathryn Josserand, Directions and Partitions in Maya World View. FAMSI (Foundation for the Advancement of Mesoamerican Studies), 2011. Facts only. famsi.org/research/hopkins/DirectionalPartitions.pdf
Our own research (2)
  1. EsoTerrier Mayan calendar research, 2026-10-11 (main report, validation report, visual survey, notes) (2026).
  2. EsoTerrier engine, Mayan reference and calculation (2026). Its texts are our own, written from the sources above.

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By EsoTerrier. Written with AI assistance from our research and checked against its sources; last revised 20 October 2026. How we write these pages.

First published ; last revised . Corrections: support@esoterrier.com.