Comment 2 for bug 694470

I think you're asking for a global setting for the view of time and that things like the panel clock and the printing from your web browser should use it. That seems a reasonable request to me.

I had a look, and the Locale environment variable LC_TIME does seem to be able to set this - not sure which programmes take notice of it, and I can't see a way of setting it in Gnome (KDE has a GUI for Locale settings).