My body, however, has not been so quick to follow suit. It doesn't want to give up going to sleep right after dinner (part of my prep before an overnight). It still wakes me up after about four hours of sleep (thankfully, not terrified that I've overslept and missed going to work!), reminding me that maybe a solid four-hour stretch is enough. It still has me eating little meals all day, rather than sticking to the traditional breakfast/lunch/dinner hours.
Maybe the body is just not as quickly adaptable as the brain. But I have a feeling that they are both pretty adaptable. And perhaps, even more important, they are both pretty protective. Turning one's hours upside down isn't easy. So, maybe all of these little quirks are simply my entire being protecting me from becoming so comfortable with day shifts that the (inevitable) shift back is a complete (and completely unsettling) U-turn. Maybe my body and brain are actually working together to keep me prepared in ways I could never manage on my own, especially once I am caught up in the schedule I am living today.
So, I manage the middle-of-the night wake-ups. And I crash sooner after dinner than I probably need to. But I go back to sleep, and I gobble up whatever extra hours I get with my family. Because it won't be long until I am back to being nocturnal. And I will be grateful for my body keeping me ready.