Simply pull the left hand (under the clock) adjustment knob OUT towards you and the hour will start to flash. Now turn the knob anti-clockwise to go back an hour (or clockwise to go forward) and once you have the right hour pull the knob again to select the minutes. Keep pulling and it will cycle through the day, month and year and finally the whole date will flash. Pull the knob once more until it stops flashing and thats it !!