This is the 1183rd most frequent Catalan word.
díaz
The word "díaz" is not Catalan; it appears to be a misspelling or refers to a Spanish surname.
Here, 'díaz' is intended to mean 'day' as part of the temporal phrase.
Cada díaz, aprenc alguna cosa nova.
Every day, I learn something new.
Here, 'Díaz' is a proper noun used as a surname, indicating a person's name.
En Díaz està organitzant la reunió.
Mr. Díaz is organizing the meeting.
Here, 'díaz' refers to plural 'days', indicating specific dates of significance.