Oh, I forgot to mention....
If you use KDE there is currently a bug in "system settings". If you set the
individually set the locale for Time formats to C in the GUI it will actually set it
LC_TIME=C.utf-8" or something like that which is non-existent and lead to several
issues.
You need to set it in your .bashrc to get things right.
--
Sorta what I want to say when folks habitually complain about Fedora -
https://youtu.be/ZArl8fTfub4