J.F.
My daughter was just the same. When she was 11 months old she thought 4 am was wakeup time and wanted to go to bed by 5 pm! Oh, how I remember! What I did was change her bedtime by 10 minutes each night. I know it doesn't sound like much, but it worked. I made a schedule and each day backed up bedtime from 5 pm to 5:10 pm to 5:20 pm, etc. We ended at 6:30 pm and she would wake up at 6 am. She's 4 years old now and still goes to bed between 6:30 and 7 pm and gets up between 6 and 6:30 am. I love it because it gives my husband and I adult time every night!!!!! Also, we have no problems getting ready for preschool because we are up in plenty of time! hope this helps!