Background: Some people over holiday periods or weekends get into sleep patterns that involve waking up very late in the day (e.g., 1pm), and then going to bed quite late (e.g.,, 4am). Such people can find it very difficult to bring back their sleep pattern to be in line with more regular day time rhythms (i.e., waking up between 6am and 10am). When earlier wake-up is attempted, this can result in feelings of fatigue and low mood. Such attempts can even fail, when the person sleeps through the alarm clock.

General questions:

  • How can a sleep pattern be effectively re-aligned with normal day time rhythms?
  • What are effective strategies for maintaining a regular sleep pattern?
  • Is there any specific research on what strategies work best?
  • $\begingroup$ A Wikipedia article stated that you can only adjust your sleep schedule by an hour at a time. Sorry for the second-hand nature. I came here hoping to find such an answer. $\endgroup$
    – NiteCyper
    Jul 3, 2016 at 11:20

3 Answers 3


Yang et al. (2001) study this exact question. They administered 6 mg of melatonin on Sunday afternoon to subjects that had delayed sleep-wake schedules for the two prior days. They found that

On Sunday, melatonin administration increased the sleepiness throughout the evening and reduced sleep onset latency at bedtime. On Monday morning, subjective sleepiness was decreased in the melatonin condition.

Kolla & Auger (2011) deal with resetting the internal clock for jetlag and night shift workers. Even though the situation is not identical, I think their main recommendations for adjusting the internal clock are relevant:

Exposure to bright light in the hours leading up to the patient’s minimum core body temperature tends to push the internal clock later in time, whereas bright light in the hours immediately afterward pushes the clock earlier in time.

(minimum core body temperature is usually 2-3 hours before wakeup time). So in other words, in order to re-align from wakeup at 1pm to 6-10am one should wake up as early as possible, and go out to be exposed to sunlight (or use an artificial light source).

They also discuss the use of drugs such as melatonin and caffeine.


  • Yang, C. M., Spielman, A. J., D Ambrosio, P., Serizawa, S., Nunes, J., & Birnbaum, J. (2001). A single dose of melatonin prevents the phase delay associated with a delayed weekend sleep pattern. Sleep, 24(3), 272-281. Full text PDF
  • Kolla, B. P., & Auger, R. R. (2011). Jet lag and shift work sleep disorders: How to help reset the internal clock. Cleveland Clinic Journal of Medicine, 78(10), 675-684. Full text.

(1) Re-aligning sleep pattern

In addition to Ofri Raviv's answer (get sunlight), I would like to stress that the only way to re-align your sleep pattern is to get up at the time you want to get up, and keep getting up for as long as it takes for your pattern to re-align, no matter how tired you are. Because, as soon as you give in and sleep longer, you re-inforce the "late" pattern you want to overcome. You will be tired for a day or two, because you didn't manage to get to bed in time, but this tiredness will enable you to go to bed earlier on the following evenings. All you have to do it go to bed when you feel sleepy.

Tiredness is a great help in building a new sleep routine, and sleep restriction (so you are tired enough to actually sleep) is a regular part in many behavioral therapies of sleep disorder. Because one fundamental problem in sleep disorders is that people spend to much sleepless time in bed, causing them to want to sleep in in the morning. When you go to bed, you want to be tired enough to fall asleep immediately, so that you get at least five hours of undisturbed sleep. But always keep your wake-up time, and work at the go-to-bed time end of your sleep cycle.

Also, avoid computer and television monitors in the evening, because they have the same effect as sunlight and will tell your body that it is still day and you should be active. So, get sun (and computer screens) in the morning, as Ofri Raviv wrote, and avoid them in the afternoon and especially evening. Sleep with the blinds open, so the morning sunlight helps wake you. An open window and fresh air will also help you feel less groggy in the morning.

(2) Maintaining a regular sleep pattern

The answer is already given in the question. As simple and tautological as it may seem, a regular sleep pattern can best be maintained by maintaining a regular sleep pattern. Behavioral therapy for children and adults with sleep disorders includes one fundamental rule, which is to go to sleep and wake up at the same time every day. No surprises there.

So, the best idea would be to not party so late that you need to sleep more than two or three hours longer than regular, and not for more than one night per week. If you need to party, you better don't go to bed at all or get up at your regular time, no matter how short your sleep was, and got to bed at your regular time (or a bit earlier) on the following evening. This will minimize the disruption. The important part is that you get up regularly on the next day.


Witnessing sleep therapies in our local psychotherapeutic day clinic.

Short introduction to behavioral sleep therapy at Wikipedia:



I've read that avoiding eating for 12+ hours and then eating breakfast helps reset your sleep pattern to wake up before that breakfast on subsequent days. I tried tat, and it seems to help


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