K., I am going to assume that your husband works. And if he does, then I will have to agree with you. I am a 42 year old mom of a soon to be 4 year old. My husband worked out of state the first year of our daughter's life so I was the one that took care of her. At 8pm every night starting when she was two months old, I would give her a bath, read her a book, nurse her, and put her to bed anywhere between 9:30pm and 10pm. I have never heard of a child having an "internal clock" before, but if I were you, since I was the one being the main caregiver of my child, *I* was the one that needed to be well rested. Since my child didn't sleep through the night until she was close to 18 months, I stuck with my routine. Every night when 8pm hit, I bathed, read, nursed/bottled her, and put her down around 9:30 to 10pm. I can vouch for the early times, though it seemed no matter how late I would put my child down, she went through a phase of awaking at 4am. So I know what it is like.
Good luck and I would try to explain to your husband, if mamma ain't happy, no one is happy! :-)
C.