Originally Posted by NumberNineDream

I've been doing that all summer [cause I prefer to live in the night]. Anyway, I have a technique to fix it: Stay up in the night and though the morning. When I the evening comes you'll be exhausted, thus sleeping ridiculously early, but for a long time. so you'll be waking up in a normal time.

So if you stay awake from 6p.m till the next day's 7p.m. so you're awake for more than 24h. In such occasions I tend to sleep for 12 hours. You sleep 7p.m and wake up at 7-8 a.m. Perfectly normal in the school, uni or work days.