ic macuililhuitl semana.

(a loanword from Spanish)

ic macuililhuitl semana.
Principal English Translation: 

Thursday, the fifth day of the week (see Molina)
(partially a loanword from Spanish, semana, week)

Alonso de Molina: 

ic macuililhuitl semana. el jueues.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 32v. col. 2. Thanks to Joe Campbell for providing the transcription.