The Maya Calendar Explained: Tzolk'in, Haab', the Long Count and What Really Happened in 2012

By the Mayan Jungle Rush team · Published November 2026 · 7 min read

The Maya calendar is not one calendar but several counts running side by side. The two most important are the Tzolk'in, a 260-day ritual count, and the Haab', a 365-day solar year. Meshed together like two gears, they repeat only once every 52 years. For longer spans of history, the Classic Maya used a third system, the Long Count, which tallied days from a starting point in 3114 BCE.

That Long Count is also behind the famous 2012 "end of the world" story. On December 21, 2012, it reached a big round number, 13.0.0.0.0. Nothing ended. A cycle closed, much like a car's odometer rolling over. Below, we break down each piece in plain language, explain where the 260-day count is still kept today, and show where you can see the calendar built into stone within reach of Cancún.

What is the Tzolk'in, the 260-day count?

The Tzolk'in combines 20 named days with the numbers 1 to 13. Each day gets a number and a name, and both advance together: 1 Imix, 2 Ik', 3 Ak'bal, and so on. After 13 the numbers start again at 1, while the names keep going through all 20. Because 13 and 20 share no common factor, it takes 13 x 20 = 260 days before the same combination comes back.

One published list of the 20 day names reads: Imix, Ik', Ak'bal, K'an, Chikchan, Kimi, Manik', Lamat, Muluk, Ok, Chuwen, Eb, Ben, Ix, Tz'ikin, Kib, Kaban, Tijax, Kawak and Ajaw. You will see different spellings, and even a few different names, in different books and Maya languages.

The Tzolk'in has no months. Researchers at the Smithsonian's National Museum of the American Indian note that 260 days roughly matches the length of human pregnancy and nine lunar cycles, and that the count is also linked to the maize-growing cycle. No single explanation is universally accepted, which is part of what makes it interesting.

What is the Haab', the 365-day year?

The Haab' tracks the solar year. It has 18 months of 20 days each (360 days), plus a short closing period of 5 days called Wayeb'. Those five days were set apart as special at the end of the year, and in highland Guatemala some farmers still mark this time with ceremonies.

The month names include Pop, Wo, Sip, Sotz', Sek, Xul, Yaxk'in, Mol, Ch'en, Yax, Sak, Keh, Mak, K'ank'in, Muwan, Pax, K'ayab and Kumk'u. The Haab' has no leap day, so over the centuries it slowly drifts against the true solar year.

How does the 52-year Calendar Round work?

A full Maya date names both counts at once, for example 4 Ajaw 8 Kumk'u. Picture a small gear with 260 teeth turning against a large gear with 365 teeth. The same pairing of teeth only lines up again after 18,980 days, which is 52 Haab' years. That cycle is called the Calendar Round.

Fifty-two years is roughly a long human lifetime in many ancient societies, and the Smithsonian notes that in Maya tradition reaching 52 is associated with the wisdom of an elder. The weakness of the Calendar Round is that a date like "4 Ajaw 8 Kumk'u" repeats every 52 years, so on its own it cannot tell you which century you are in.

What is the Maya Long Count?

To pin events to a single point in history, Classic Maya scribes used the Long Count, a running total of days since a mythical creation date. It is written as five numbers separated by dots, from the largest unit to the smallest:

• K'in: 1 day
• Winal: 20 days
• Tun: 360 days (18 winals)
• K'atun: 7,200 days (20 tuns), about 20 years
• B'ak'tun: 144,000 days (20 k'atuns), a little under 400 years

Notice that almost every step is a multiple of 20, because Maya numbers are base 20. The exception is the tun, which uses 18 winals to get 360 days, close to a solar year.

The count starts at 13.0.0.0.0 4 Ajaw 8 Kumk'u, which most scholars place on August 11, 3114 BCE in our calendar (some use August 13). As an example, the Smithsonian gives January 1, 2000 as 12.19.6.15.2. You will find Long Count dates carved on stelae, the tall stone slabs set up at many Classic-period cities.

What actually happened on December 21, 2012?

On December 21, 2012, the Long Count completed 13 b'ak'tuns and once again read 13.0.0.0.0. Its Calendar Round date that day was 4 Ajaw 3 K'ank'in. That is all that happened on the calendar.

The doomsday idea grew mostly outside the Maya world. The main ancient text that mentions this date is Monument 6 from Tortuguero, in Tabasco, and its glyphs are damaged. In a 2011 National Geographic report, epigrapher David Stuart explained that his earlier reading of a god "descending" on that date likely referred back to the monument's own dedication, not to a prophecy. Archaeologist William Saturno summed it up this way: was it predicted to be the end of the world? "No. That's just us."

There is also a simple counter-argument carved in stone. As CyArk points out, inscriptions at Palenque and Tikal refer to dates beyond 2012, so Maya scribes clearly expected time to keep going after the 13th b'ak'tun.

Do Maya communities still use the calendar today?

Yes. The 260-day count is still kept in some Maya communities, mostly in the highlands of Guatemala. There, K'iche' and other Maya day keepers, called ajq'ijab' (singular ajq'ij), use the sacred calendar for ceremonies and guidance. The Smithsonian notes that a new 260-day cycle is celebrated on the day Wajxaqib' B'atz' (8 B'atz'), when new day keepers are initiated, and that many people consult a printed version of the count, the Chol Q'ij, every day.

In Yucatán, the picture is different but the roots are still visible. Maya farmers hold agricultural offerings and rain ceremonies at set times of year, and printed Tzolk'in calendars are popular. If you are curious about the rain ceremonies, our guide to Chaac, the Maya rain god explains the connection to cenotes and the milpa (cornfield).

It is a good reminder that the Maya calendar is not a relic of a vanished people. Millions of Maya people live in Mexico and Central America today, many of them speakers of Maya languages, and the calendar is part of a living tradition.

Where can you see the Maya calendar near Cancún?

The most famous example is El Castillo, also called the Temple of Kukulcán, at Chichén Itzá in Yucatán state. Each of its four stairways has 91 steps, and with the platform at the top that adds up to 365, one for each day of the Haab'. Popular Archaeology also links its 52 panels to the 52-year Calendar Round.

Around the spring and fall equinoxes (about March 20–21 and September 22), the late-afternoon sun throws a row of triangular shadows onto the side of the north stairway. The light connects with the carved serpent head at the base, so it looks like a serpent is sliding down the pyramid. Yucatán Magazine reports that the effect lasts around half an hour in the late afternoon, and thousands of people gather to watch it. If you plan to go on an equinox, expect large crowds and check with INAH (Mexico's National Institute of Anthropology and History) for access rules before you go.

Chichén Itzá is a full-day trip from Cancún; our guide to day trips from Cancún compares it with other options. Closer to your hotel, the Maya ruins inside Cancún and the Museo Maya de Cancún are a good, shorter introduction to Maya history.

See the living landscape behind the calendar

The Maya calendar was built around rain, maize and the seasons of the Yucatán jungle. If you want to see that landscape up close, our tours on the Ruta de los Cenotes near Puerto Morelos combine ziplines and ATVs with a swim in a jungle cenote and a Maya snack. You can compare them on our tours page and ask your guide about the plants and seasons around the cenote. To pick up a few words before your trip, try our list of Yucatec Maya words and phrases.

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