Unable to answer "What are the opening hours here?" – Biblioteca "Antonio Caso" (Library) – https://osm.org/way/372788409 via StreetComplete 59.3:

Horario de servicios:
Lunes a Viernes de 08:00 a 20:00 hrs
Sábado de 08:00 a 16:00 hrs

Attached photo(s):
https://streetcomplete.app/p/253836.jpg