Press the [ADJUST] button until the seconds starts blinking.

Press the [MODE] button to go through the settings until you get to the hour, minute, and seconds adjustment.

Press the [FORWARD] button to scroll forwards, for example, from 9 to 10 o'clock.

Press the [REVERSE] button to scroll backwards, for example, from 10 to 9 o'clock.

For more features and settings, consult the user manual.