The Sat Nav, doesn't display the 'time', but it does display the destination's time of arrival, which uses the GPS satellites. With regards to the clock in the small screen (multi-function display-MFD): Push & Hold the DISP button your steering wheel, which should change the MFD screen, then select 'set time' by depressing the DISP button, and setting the time should be intuitive. Once you have the correct time, just let it sit, it will go to the default screen.