To be honest the easiest way is for you to hack it in yourself . Connect to
your device via ActiveSync, and open the explorer window to browse the
files. Go into the \windows directory and copy the file called full.home.xml
to your desktop. Rename it to something like full_date.home.xml. Then, open
it in Notepad.
You need to make two changes. The first is to change the name of the layout
that shows up in the control panel, so you can tell your layout apart from
the others.
Now we just have to add the date. Search through the file for the section
that looks like this:
And change it to:
Save the file, copy it down to your device, and use the control panel to
change to it. You might have to mess with the 120 number above, I was just
guessing at it. You may find that you have to add or subtract it to make the
date show up in the best place horizontally.