ilhuizolli.

Headword: 
ilhuizolli.
Principal English Translation: 

a feast day
Gran Diccionario Náhuatl, citing A. Wimmer (2004), citing the Florentine Codex, Book 6; https://gdn.iib.unam.mx/diccionario/ilhuizolli/51183

a marvel
John Bierhorst, Ballads of the Lords of New Spain (2009), p. 52.