To set the time, get the lights to flash on the screen by tapping the watch face once and when they come on, touch and hold your finger to the watch face about 6 seconds until the hour dot starts blinking. Then tap and let go and the hour will move with each tap.
Once you've got the hour right just let go and wait for about 5 seconds and the watch will automatically start flashing the minutes. Tap again and the minutes move one by one until you get to the correct minute. Then just let go and look at the watch and it will go dark after 5 seconds.