just as if it was not a holiday of obligation (see Molina)
Alonso de Molina:
iuhquimmaca ilhuitl. assi como sino fuera fiesta de guardar. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 43v. col. 2. Thanks to Joe Campbell for providing the transcription.