The Maya and Aztec past, counted to the day.
Read today in the Long Count, the Tzolk'in, the Haab' and the Aztec day count. Walk nine eras of history, open sourced cards on cities, rulers and discoveries, and keep what you read. All of it works offline.
This is the app's own arithmetic, running right here. Today reads 8 Imix 14 Sak'. Step a day, jump twenty, drag the wheel or pick any date, and watch thirteen numbers mesh with twenty day names.
30 October 2026 CE
Correlation GMT 584283
13.0.14.1.1
Numbers and names step together, so the same pair returns after 260 days. Together with the Haab', a pair of dates repeats only after 18,980 days.
Caso correlation
Demonstration only: the Aztec counts are not reconstructed for dates before the Mexica era, because the anchor of the correlation is a 1521 record.
The day count uses the Caso correlation, which places the fall of Tenochtitlan, 13 August 1521, on 1 Coatl. The year name is counted from 1 Reed in 1519; it shows how the count runs, not a name any town recorded. The veintena of a modern date is not shown, because scholars disagree on when the Aztec year began.
Two calendars, one rhythm. Tap a row for details.
A carved tab bar, a drawn glyph for each section, and a navigation path per tab, so every filter and every open card waits where you left it.
Today in History, the golden disc you drag through the Maya and Aztec day counts, the era explorer, a theme of the month and a saved collection of recent discoveries. Choose Maya, Aztec or all civilizations and every block follows.
Zoom through time. Pinch a ribbon of nine eras, from the Mythic Count to Modern Research, tap an era to open its events, filter by category and compare two eras side by side.
Turn the Maya counts and the Aztec count, compare the two systems row by row, read any date in the Calendar Explorer, then try short learning cards and mini quizzes with explanations.
Sixteen archaeological sites, from Tikal and Palenque to Tenochtitlan and Teotihuacan, on the map or as a list, each with its history, architecture, finds and what lies nearby. Ancient borders are not drawn: territories changed over time.
Star events, places, people and cards, build collections such as Maya Astronomy, follow your reading path with suggestions from the same topic, and pick up the cards you did not finish.
Each era is as wide as its length in centuries. Tap one to open the events the app records for it, each with its date, civilization and how sure we are.
History of the Maya and the Aztecs is full of guesses retold as facts. Ancient Pulse keeps them apart, shows its working and lets you check.
Every event carries a label. Confirmed means excavated or written in ancient texts. Interpretation means the explanation of researchers. Tradition means myth or later histories.
Each card names where it comes from: standard histories, the Florentine Codex, UNESCO World Heritage records, INAH reports and peer reviewed studies, with dates written the way historians write them.
Readings start from the Julian Day Number and a named correlation. Switch between GMT 584283 and Lounsbury 584285, which places every Maya date two days later.
Pick any modern date from 1583 to 2200, or set a Long Count place by place, and see how every count reads it, with the method shown step by step.
Twelve quizzes of three questions each, from Tzolk'in Basics to Archaeology Today. Every answer comes with the reason, and your best result is saved in the Archive. Try one:
Which day follows 13 Ajaw?
The whole chronicle is built in. Only map tiles need a connection. There is no account and no tracking: saved cards, collections, reading history and quiz results stay on your device.
Found a date that reads differently in your sources, have an idea for a new card, or need help with the app? Send a note.
Or email us directly at info@jokrmerge.click.
Free on iPhone. The disc is already turning.
Made for the curious: students, travelers and anyone who has stood at a pyramid and wondered what day it was.
