Dottore are you saying system wide settings doesn't apply to
GNOME?
Not sure. Is it normal for locale and localectl to report different
values for LC_TIME?
[mjc@xena ~]$ localectl
System Locale: LANG=en_US.UTF-8
LC_TIME=en_DK.UTF-8
VC Keymap: us
X11 Layout: us
X11 Model: pc105+inet
X11 Options: terminate:ctrl_alt_bksp,
[mjc@xena ~]$ locale
LANG=en_US.UTF-8
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=