Aztec New Year
mexica new year spanish año nuevo mexicano año nuevo azteca nahuatl language yancuic xīhuitl pronounced ˈjaŋkʷik ˈʃiːwit͡ɬ celebration new year according aztec calendar date holiday fall gregorian calendar depends version calendar used generally considered occur sunrise march holiday observed nahua community mexico celebrate ocote pitchpine candle lit eve new year along firework drumming singing important event occur huauchinango naupan mexico city zongolica xicotepec latest accepted version proposed professor rafael tena inah based study durán sahagún alfonso caso unam correlation confirms first day mexica year february th according old julian calendar february rd current gregorian calendar using count verified date birth huitzilopochtli end year cycle tie year new fire ceremony daysign tecpatl year acatl corresponding date february nd day calendar corresponded solar year divided month day plus nameless day end year also codex show existence leap year