If you're a passenger, cover up your eyes. Bright morning light can reset your biological clock and keep you awake, according to Dr. Weber. Black it out. Try to block out daytime sounds as well. Literally, you get up and go to sleep when the Japanese do.
Many shift workers revert back to a daytime schedule on their days off.
But this flip-flopping just makes it harder for you. For your own sake, it's better to stay on your nighttime schedule, says Dr. Bliwise. Enjoy the morning. Some nighttime workers sleep better when they delay their slumber until late morning or early afternoon, says Dr. Bliwise. That way, they take advantage of the body's natural inclination to nap in the afternoon.