Ollin
movement · East
What it names
Ollin means «movement». It is sign number 17 of the twenty by which days are counted, and the sources associate it with movement, earthquake, transformation, synchronicity.
Its ruling energy
It is ruled by Xólotl.
Direction and element
Its direction is the East and its element fire. The share-out among the four directions runs in order and without exception; what the sources do not fix the same way is the colour and the guardian of each direction.
The trecena it opens
When the numeral one falls to it, the thirteen-day stretch named after it begins: 1-Ollin, trecena number 13 of twenty, with its own name, its ruling energy, its direction and its plate.
Its thirteen days
Each sign combines with thirteen numerals, so Ollin appears thirteen times in a full 260-day round — once with each numeral. The pair only repeats after 260 days.
- 1-Ollin
- 2-Ollin
- 3-Ollin
- 4-Ollin
- 5-Ollin
- 6-Ollin
- 7-Ollin
- 8-Ollin
- 9-Ollin
- 10-Ollin
- 11-Ollin
- 12-Ollin
- 13-Ollin
These dates are not pluralised: one says 5-Ollin, never five Ollins.
What is not here, and why
We chose not to touch the primary text. Those sections quote Sahagún, Durán and the codices in their own words, often in sixteenth-century Castilian. A quotation carried across stops being a quotation: it loses the register, the ambiguity and the exact wording someone might want to check against a facsimile.
Read the sourced commentary in Spanish → Nahuatl terms and day names are the same in both versions.
How to cite this page
Alma Mexica, «Ollin», The twenty day-signs. Revised 2026-09-17. https://almamexica.org/en/day-sign/17-ollin/
Mexica Sign · the obsidian mirror of fate the companion app: your day read from the sources, every morning