Work: Late Night vs. Early Morning

I would like to know your opinion when you are more productive and creative at work? When do you work at night or early in the morning?

I am 23 years old and so far I'm working poorly on ideas and working on my own business in the morning. I feel zero concentration in the morning. However, it goes much better at night.

And how is it with you? Do you prefer work at night or in the morning?

Sorry for my english, I'm still learning.

from Work: Late Night vs. Early Morning