I'm sure it's not normal for most babies, but mine started doing that at around 2-3 weeks old and hasn't stopped. I say, if he/she is hungry, they'll wake up to eat. Usually mine will be hungry every hour or two for about four-six hours, I call it his feeding frenzy before bed, makes me think he's filling up for last call.
at 9:26 PM on Jul. 16, 2008