Aztec horoscope

The word people search for

«Aztec horoscope» is the most searched phrase in this whole subject, which is why this page is called that. But the word is Greek — hora and skopos, to watch the hour — and it describes a technique that sorts people into twelve boxes according to where the planets stood at birth.

The tonalpohualli does not do that, and not because it is better or worse. Because it is a different thing, and the difference is worth setting out precisely.

It was a divinatory count, and there is no point pretending otherwise

The literature calls the tonalpohualli the 260-day divinatory calendar, and it is right to. It was consulted before a trading expedition set out, before an army marched, before a marriage was agreed. Saying that it was not divination would be special pleading.

What it was not is astrology. Not one of its layers refers to a planet, a star or a position in the sky.

The reading came out of a book

The specialist who read the count was the daykeeper — tonalpouhqui, literally «day reader» or «day counter». What he interpreted were the almanacs painted in the books that were called tonalamatl for exactly that reason: «paper or book of the days».

That is the difference, and it is one of source rather than of purpose. An astrologer reads the sky; a daykeeper read a book, one he had been trained to use, and he interpreted what he found there alongside whatever he had been asked. Where his answer came from could be pointed at.

And the reading could be changed

When a child was born the daykeeper was called, and if the day came out heavy the naming could be moved to a neighbouring, more favourable day — the name was given at the ritual bathing, four days after birth, and that ceremony could wait.

That only makes sense if the count was not a sentence. It was material to work with: consulted, weighed, adjusted. A reading you can move to another date is not a horoscope.

Twelve boxes against two hundred and sixty days

The zodiac sorts humanity into twelve groups by month of birth. The tonalpohualli combines twenty signs with thirteen numerals and does not repeat for two hundred and sixty days, and each of those days also carries its Lord of the Night, its Lord of the Day, its direction, its trecena and its veintena.

That is not twelve boxes: it is two hundred and sixty combinations, each with several layers read together. And those layers are day signs, numbers and patron figures — not planets.

What the count was, and what this site does, are two different things

That the tonalpohualli was consulted for divination is a fact about the sixteenth century. What this site does is not divination, and the distinction is not a nicety: it is the whole method.

Nothing here is offered as a reading of your day, your character or your future. What is published of the auguries is what the primary sources state — Sahagún's own text, chapter by chapter, with the reference at the foot of each one, and with the closing line the friar himself used: «Así los presentó Sahagún, como augurios». This is how Sahagún presented them, as auguries.

Not one line of it is our interpretation. Where the sources disagree, both versions are published and each is attributed. Where a source says nothing, the site says nothing. Where a passage is our own writing rather than a source's, the page says so in as many words.

So what does this site publish

The count itself, with its five readings, its algorithms and its checksums, so that anyone can check where each date comes from. And a corpus of sixteenth-century material, sourced claim by claim.

A horoscope needs none of that. A reference work needs all of it — and it is the difference between handing someone a document and telling them what their day holds.