For the last 11 years I've had the same issue with my sleep. I sleep a normal amount of time, between 7 and 8 hours, but it occurs at the 'wrong' time of day. My normal time to fall asleep is around 6am. I've tried both prescription and over-the-counter sleep aids to try and sleep at a normal time. But these only result in me being tired and groggy, yet still unable to fall asleep until around 6am. If I force myself to stay awake for a prolonged period of time (36+ hours) I can fall asleep from exhaustion at a normal time, and even wake at a normal time. But this only corrects the problem for a day or two before I find myself again unable to sleep before my usual 6am bedtime. I've also tried herbal remedies, relaxation techniques, inducing severe boredom to try to induce sleep, and seen psychiatrists about the issue being caused by depression/anxiety. If I have other people force me awake at a normal time, I feel severely sleep deprived and tired, yet can't fall back to sleep again until nearly the usual time, around 5am in these cases. Other than the odd timing of my sleep, everything seems normal. I have normal REM sleep, wake refreshed and alert, have no periods of tiredness or grogginess throughout the day and by all accounts from those around me, am perfectly normal...albeit 7 or 8 hours 'off' the norm. I'm wondering if anyone else who also has this problem (normal sleep, but at an abnormal time) has found a way to get themselves on a more socially acceptable schedule. This is making getting and keeping a job difficult, effects my social life severely, and even makes simple things like seeing a doctor or going grocery shopping nearly impossible. (From what I've heard and read, this problem is referred to as 'Delayed Sleep Phase Disorder')