NEO Library · Open, free and for everyone
The Great Mexican Library
The library of the cultures, sciences, arts and territories of Mexico and its great region, from the Pacific to the Gulf of Mexico and from the North to Central America. Built on library science and AI, open to every reader, human or machine.
Regions of Mexico · new collections
- Your Mexica day-sign of the 260-day Tonalpohualli
- Your sacred number, 1 to 13, and the force that rules it
- Its meaning for you, written by the librarian
NEO MAP 2.0 · The Mexican Bioregion, land and sea
The Great Mexican Map
From the Pacific to the Gulf of Mexico and the Caribbean, and from California and Texas to Guatemala and El Salvador: the 68 pueblos originarios and 46 sister peoples, the cities of Mesoamerica, Aridoamerica and Oasisamerica, nature, trains and eleven routes. Plan your own trip inside the map.
NEO MAP 2.0 · Librarian Joséf Sánchez Coach · Colegio de Bibliotecología, UNAM · México 2026. Points of each people mark the approximate center of its main territory; routes and outlines are schematic.
Free · Written by hand · The Mexican Library
Free Nahua Tonalli Reading
Your free Mexican birth report by Librarian Joséf Sánchez Coach: your day-sign, your sacred number (1–13) and their meaning on the 260-day Tonalpohualli count.
Ask the calendar: when were you born?
Each reading is written by hand by the librarian, so it can take a few days to reach your inbox. Please be patient, and check your spam or promotions folder.
By sending this form you accept the Terms & Conditions and the Privacy Notice. Your data is used only to prepare and send your reading; we never sell it.
Send your birth date
Name, email, the day and place you were born. Less than a minute.
The librarian counts it
Your day is placed by hand on the unbroken 260-day Tonalpohualli count, sign by sign and number by number.
Receive your reading
Your Tonalli sign, your number and their meaning, written for you and sent to your email. Free.
- Your Nahua Day-Sign
- Your Tonalli number 1–13
- Ruling deities & forces
- Gifts and challenges
- 260-day Tonalpohualli
Each reading is prepared by Librarian Joséf Sánchez Coach · Colegio de Bibliotecología, UNAM · México 2026 · The Mexican Library · built with SESY.AI
3 · The heart of the library
68 pueblos, 68 languages, one Mexico
Mexico is plural from its root: 68 pueblos originarios with their own language, 11 language families and 364 variants. Each one keeps a way of naming the world. Open a people to read its record: festivities, gastronomy, music and instruments, colors and symbols, and its place on the Great Mexican Map. Each record will grow into its own library and its own map.
Source: INALI catalog of national languages (2008) and INEGI. Self-names in their own languages. Also recognized by the Constitution: the pueblo afromexicano of the Costa Chica and other regions.
4 · The Mexica Calendar
Two wheels, one sun
The peoples of central Mexico counted time with two interlocking wheels, the same logic shared across Mesoamerica. Learn how they work, then reveal your day below.
Tonalpohualli
The count of days and destinies: 20 day-signs × 13 numbers. The count of your Tonalli.
365 daysXiuhpohualli
The solar year: 18 veintenas of 20 days, each with its festival, plus the 5 nemontemi days.
52 yearsXiuhmolpilli
The binding of the years, renewed with the New Fire ceremony on the Hill of the Star.
Museo Nacional de AntropologíaThe Sun Stone
The great Mexica monolith with the 20 day-signs around the face of the Fifth Sun, Nahui Ollin.
Your Tonalli in 5 seconds
Enter your birth date to see your day-sign, your number and the force that rules it. Your full personal reading goes further.
6 The 20 Nahua Day-Signs of the Tonalpohualli
Each day-sign has a patron force and faces one of the four directions, turning East, North, West and South in an endless cycle, as painted in the Codex Borgia. In Nahuatl the four directions are Tlapcopa, Mictlampa, Cihuatlampa and Huitztlampa.
7 The Nahuatl Numbers (1–20) & Base-20 Mathematics
The Nahua counted in twenties: a dot for each unit, a flag (pantli) for 20, a feather (tzontli) for 400 and a bag (xiquipilli) for 8,000. The 13 numbers of the Tonalpohualli are the first thirteen:
8 · The Mexican Codices
The painted books of ancient Mexico
Written in images on deerskin, amate paper and European paper, the codices hold calendars, gods, migrations, tributes and genealogies. Most are kept far from Mexico; the library orders them so every reader can find them.
Codex Borgia
The great book of the Tonalpohualli and the gods of the days.
Bodleian Library, OxfordCodex Mendoza
The founding of Tenochtitlan, its tributes and daily life.
Biblioteca Medicea Laurenziana, FlorenceFlorentine Codex
The encyclopedia in Nahuatl and Spanish compiled by Sahagún and Nahua scholars.
Museo Nacional de AntropologíaTira de la Peregrinación
The Mexica migration from Aztlan, also called Codex Boturini.
British Museum, LondonCodex Zouche-Nuttall
Mixtec history and the deeds of Lord Eight Deer Jaguar Claw.
Assemblée nationale, ParisCodex Borbonicus
The Tonalpohualli and the festivals of the solar year.
9 · Everything in the library
Collections, tools and sister libraries
Tonalli Reading
Your day-sign, number and meaning, written for you.
NEO MAP 2.0The Great Mexican Map
Peoples, sites, trains, routes and a trip planner.
68 pueblosPeoples and languages
The living plurality of Mexico, people by people.
260 · 365 · 52Calendar
Tonalpohualli, Xiuhpohualli and the New Fire.
ArchiveCodices
The painted books and where they are kept.
Sister libraryThe Mayan Library ↗
Tzolk’in, Nahuales, NEO MAP 1.0 and the Gran Selva Maya.
PortalGran Selva Maya ↗
The great forest of Mexico, Guatemala and Belize.
Sister libraryWorldwide Library ↗
The knowledge of the world, ordered.
InitiativeNative International ↗
Elders, voices and the wisdom of the peoples.
The systemNEO Library ↗
The new library for the new civilization.
10 · Nature and culture are one
Megadiverse Mexico
Deserts, cloud forests, jungles, reefs and volcanoes: Mexico is one of the 17 megadiverse countries of the planet and the land where maize, beans, squash, chili, cacao and vanilla were born. Its biological and cultural diversity grew together, and where the languages live, the forests live.
11 · The agreements that protect them
Rights, languages and corridors
Subjects of public law
The constitutional reform of 2024 recognizes pueblos originarios and the pueblo afromexicano as subjects of public law, with their own legal personality and assets.
National languages
All the languages of the pueblos are national languages, with the same validity as Spanish; INALI was created to care for them.
Gran Selva Maya Corridor ↗
Mexico, Guatemala and Belize joined 5.7 million hectares of forest in one biocultural corridor.
A decade for languages
The UN decade dedicated to the languages of the original peoples of the world, with Mexico as a leading voice.
12 Questions
What is the free Tonalli reading?
How do I get it?
What is the Tonalpohualli?
Can I see my day-sign right now?
How many pueblos originarios are there in Mexico?
Why does the map reach the United States and Central America?
What is NEO MAP?
What are the Mexican codices?
How did the Nahua write numbers?
13 About the Mexican Library
The Mexican Library (mexicanlibrary.org) is a library of NEO Library, the new library for the new civilization. It orders the science and culture of Mexico, its peoples, languages, calendars, codices and territory, and opens them to every reader.
Librarian Joséf Sánchez Coach (UNAM), author of NEO Library, prepares every reading.
josef.sesy.ai ↗ The sister libraryThe Mayan Library: the Maya world, its calendar and its forest.
mayanlibrary.org ↗ The methodLibrary science from the thesis of Sánchez González, José Fernando (2014), UNAM.
Read the thesis ↗ The technologyBuilt and hosted with SESY.AI, Semantic Systems & AI, on our own infrastructure.
sesy.ai ↗14 · The technology of the library
SESY.AI · Semantic Systems & AI
The same library science and AI that order the Mexican Library can order your business, so people, Google and AI find it, trust it and choose it: hotels, restaurants, shops and services.
15 · Keep the library free
Contribute to the Mexican Library
Free readings, open maps and an open archive are sustained by readers. Every contribution keeps knowledge free for everyone.
Contributions go to Joséf Sánchez, individual (persona física) registered in Mexico; they are not tax-deductible.
16 · Sponsors of the library
They support open knowledge
Tulum.rent
Verified houses, apartments and villas for long stays in Tulum, Quintana Roo.
Aldea Zamá · TulumAldea Zamá rentals
The walkable heart of Tulum, apartments for monthly and yearly stays.
Aldea Zamá · TulumHome maintenance services
Repairs and upkeep for homes and condos in Aldea Zamá.
Your brand hereSponsor the library
Announcements and sponsorship spaces for businesses that share our values.
Sponsored spaces are clearly marked and kept apart from the library’s knowledge, which is never for sale.
Your day has a sign. Discover it.
Free, personal and prepared by a librarian. One form, one minute.
★ Get my free Tonalli reading ↑
