i have a bad case of jetlag after I flew from Japan to california. It's been a week already, I would sleep at 10 pm, and automatically wake up at 3 am. Someone said I should avoid touching my iPad mini 4 at night coz of the blue light which affects my body's internal clock keeping me more awake.. I have night shift enabled for the past week but I haven't noticed any difference whether it helps me fall asleep. Granted night shift is definitely more pleasant to my eye at night coz of the warmer color.