I'm on a similar sleep cycle to you and find it extremely difficult to change. Getting to sleep before midnight is almost impossible for me.

Its unfortunate because similar to you, most of the work in my office is accomplished during the morning hours. Furthermore, I am studying my masters as well and the libraries here in Germany close at 8 PM.

I find myself most awake and productive after leaving the office around 6 PM so I often go home and do some more work from my house.

I've found my colleagues are actually impressed when they see work emails timestamped from around midnight. They think I'm putting in extra effort, but the truth is I'm making up for my lack of productivity during the early work day.