It's just me who to blame. I like to leave early to work, so that when I commute it's quiet and I can do work in the train. But the problem is than I like evenings. You just have to have one Game of Thrones episode and sleep rhythm is ruined. ;)

My normal sleep routine would be 23:15 to bed and 06:45 up, so about 7,5 hours. Everything under that I consider sleep deficit.