https://www.scientificamerican.com/article/how-to-survive-as-a-night-owl-in-a-9-to-5-world/

Would you rather watch a sunrise, or count the midnight stars? Do you have your creative energy and optimistic zeal when you pop out of bed in the morning, or when everyone else has gone to bed for the night? Or how about this—if you had to wake up at 6:00am, would you look and feel more like Mary Poppins or Oscar the Grouch? 

Your answers will depend on your chronotype, a biologically hardwired tendency for your body and brain to function best at certain times of day. Most of you are somewhere in the middle—you don’t love waking up at 5:00 a.m. for a run, but you’re not the type to be buzzing with energy after midnight either. But many of us have more obviously advanced or delayed chronotypes. That is, we could be extreme morning larks or night owls.