Ubuntu 10.10 custom clock format

Step 1. Press "ALt+F2"

Step 2. Run: gconf-editor

Step 3. Navigate to "Apps -> Panel -> Applets -> Clock_Screen* -> Prefs"

Step 4. Double-click on the 'Format' value. Change it to 'custom'.

Step 5. Double click on the 'Custom Format' field and paste in the code from one of the styles below.

%Y-%m-%d %H:%M:%S %a w%W
%Y-%m-%d %H:%M:%S %a
%Y-%m-%d %H:%M
%m/%d/%Y %H:%M:%S %a w%W