cemilhuitonalli.

Headword: 
cemilhuitonalli.
Principal English Translation: 

day sign, a feature of the calendar and predicting one's fate at birth (see attestations)

Attestations from sources in English: 

ça niman yquac aciteuetzico tenochtitla yn acico quecholli cemilhuitonalli chicuey ecatl = He [Cortés] reached Tenochtitlan very quickly; he arrived in the month of Quecholli, on a day Eight Wind.
James Lockhart, We People Here (1993), 256–257.