I'm on Ubuntu 18.04 and I installed clock override both from extensions.gnome.org and the Ubuntu software store.
With both sources I encounter the same issue. The format string is not interpreted correctly with some exceptions:
Example %H.%M yields %H.%M
Example 🔔 works
Example %;cf (emjoi clock face) works
Example %H %;vf (slow time) works
Example %FT%T (iso date time) yields %FT%T
Example %H:%M @%;@. (local and internet time) works
Example It is %M minutes past hour %H fails
%% yields %% instead of %
%F (%a) %;cf %T works
%F (%a) %;cf %T fails
%F (%a) %; %T yields the default (same as w/o Clock Override)
So a format string only seems to work if it contains %; where denotes something valid as cf or vf. A format string is ignored if it contains any other combination of %;, even if added to a format string that works. All other strings seem to fail, i.e., not interpret the format string.
I'm on Ubuntu 18.04 and I installed clock override both from extensions.gnome.org and the Ubuntu software store. With both sources I encounter the same issue. The format string is not interpreted correctly with some exceptions:
So a format string only seems to work if it contains %; where denotes something valid as cf or vf. A format string is ignored if it contains any other combination of %;, even if added to a format string that works. All other strings seem to fail, i.e., not interpret the format string.