Comment 1 for bug 775113

%W works in my format, but %U and %V don't. They blank the whole datetime display, although the required space is still reserved.

%a %d-%m-%Y (Wk%V) %H:%M:%S
displays nothing, but is equally wide as
%a %d-%m-%Y (Wk%W) %H:%M:%S
which displays the correct date and time on my system (but I need the other week number).

%V %V %V is blank and three times as wide as just %V