How to change the language on the days of the week in the Time Input widget

How to change the language for Portuguese on the days of the week in the Time Input widget ?
I want to exchange: “mon tue wed thu fri sat sun” to “seg ter qua qui sex sab dom”.

You would probably need to edit the library for that… Using a good text editor like Notepad++ search the library files for the text and change them accordingly.

EDIT: OOPS, sorry… You are referring to the App, not the library. The App is not open source, so we users do not have access to make those changes.