The Aztec date as presented above shows the name and number of the year (xiuhpohualli in Nahuatl, the language of the Aztecs), the name of the 13-day week and the name and number of the day in the tonalpohualli (260-day ritual day count). To understand the workings of the Aztec calendar and its significance for Aztec (or Nahua) culture, see Introduction to the Aztec Calendar. To find out the Aztec equivalent of any given date, go to the Date Calculator. Enter your birthdate and find out your Aztec name! You can can even change the way the Aztec date on this site is correlated to our (Gregorian) date. To do so, go to Preferences. Experts can even use any correlation they prefer.