Tōnalli

The sacred reading

The mask of Tezcatlipoca decorated with obsidian and turquoise over a human skull

I’ve created an app called Tōnalli, a reimagined device once used to consult the stars.

To begin and access your personalized reading, tap the skull above or the mirror below. Let fate tell you what it holds.

Time and space held immense importance for the Nahua people. Pre-dating the Spanish arrival by two to three thousand years, Mesoamerican peoples developed a circular calendar system with many beginnings and endings.

This circularity was not metaphorical; it was counted. Two separate charts, one of 260 days and one of 365, were tracked with precision, predicting the day of alignment every fifty-two years.

The Nahua closely watched the sky, especially Venus, which they saw as Quetzalcoatl, the deity of creation, wind, and cacao. Daily life and spiritual practice were intertwined, reflecting the dual nature of the calendar. The xiuhpohualli counted the solar year, fields, tributes, and festivals, while the tonalpohualli counted fate. Every day held a position in both charts.

Consulting the count was a sacred act, not mere stargazing. Specialists called tonalpouhqui read the tonalamatl, a painted book of days with twenty signs and thirteen numbers. Food and drink were offered as payment, and the tonalpouhqui determined the day’s good or dangerous nature.

What I’ve built here draws on that practice without claiming to reproduce it. The consultation I composed—the obsidian mirror, the fire on its surface, the focused mind before touching—gathers elements described separately and binds them into a single act. Tezcatlipoca, the Smoking Mirror, shapes fate. The tonalpouhqui, or day-reader, worked from a painted book, maize on cloth, polished obsidian, and the mask above—all considered tezcatl, the mirror of fate, showing the unseen.

The app I created Tōnalli uses an ancient and real count. The two calendars run as they did centuries ago, and the given day is the actual day. Thus, the dual calendars are living.

With a focused mind, set your date and hold your question. Tap the mirror and watch the flames take its surface. A reading in the old shape returns—what the day favors and what it endangers.

Our ancestors understood blood as payment on a debt. The gods gave their own to set the Fifth Sun moving at Teotihuacan, and Quetzalcoatl bled on the bones of the dead to make us. Blood sacrifice was returned in kind, not out of cruelty but obligation, so the sun would keep its course and the earth would bear. Keeping the count was to keep that bargain, moving with the world’s currents.

Connecting with my app Tonalli steps you back into that rhythm: two wheels turning, a day with a character, and a question asked at the right moment.