Linux Mint - Calendar Locale (Change days name)

Question

Using Linux Mint 18.3 Sylvia on 64-bit, I cannot find out how to change the locale only for Calendar (changing Monday to Luni[Romanian] for example).

I want the rest of the things to stay on EN_US, but I need to change the calendar locale (days) to Romanian. I have tried editing the file in /etc/default/locale, but it still does not work.

How can I do this?

Answer 1

Run the calendar from terminal:

$ LC_ALL=ro_RO.UTF-8 <your calendar program>

But first generate the locales with dpkg-reconfigure locales.