P.C.
I have to wake up in the middle of the night and eat all the time. i think he probably is being very slow to adjust to the time change. BUT don't discredit the possibility that he has a very fast metabolism, as I do and one side of my family does. My grandfather, my mother and my son all get VERY hungry in the middle of the night. I simply cannot sleep when I feel that way. And I have always been slender.
My husband is very slow to adjust to time changes tho, and i think that this is what you are experiencing. I bet his emals are all off too.