@colucix: Thanks for the reply, but I've already done that:
I know how to customise the time display in the clock applet itself - but there doesn't seem to be any way to change the way the tooltip displays the date.
There is no entry in gconf-editor for the tooltip date format.
What you're suggesting does not change the date format in the tooltip
- it only changes the time/date format in the main clock display. And 'gconf-editor' is
the Gnome configuration editor.
I want to change the format for the tooltip
date display that pops up when the mouse is held over the clock applet.