I have no specific advice, as I haven't done this shift before. But I wanted to acknowledge I read your post. The only thing I can think, in terms of when I have had to shift my routine, is to sort of force it for a few days, and then your body adjusts. So like, for a couple of days, you may be awake more hours at night, unable to sleep at night, and groggy at work, but realize you just have to push through until your body adjusts. I had this sort of shift in schedule when I was marathon training and also with different jobs, also when traveled a lot for work and dealt with time changes all the time. But never as drastic as the night shift.

I bet there are blogs about this kind of transition you could search for if you don't get much of a response here.

Seesaw