Actually there's no recommended bedtime, just a guideline for how much sleep for what age
How much sleep does your child need? | BabyCenter
According to the chart, Louis needs a total of 14.25 - 15 hours of sleep at the age between 3-6 mths.
I remembered my son sleeping from 5+pm up to 3+ mths old. After I went back towork when he turned 4 mths old, his bedtime got pushed back to 7+pm.
What does he do when he wakes up in the early mornings? What do you and hubby do? What I did to "encourage" him to go back to sleep is to do nothing after feeding him. I fed him with the lights off. I dont't even talk to him when I fed him at these times. It's latch on and I go back to sleep. He'd unlatch, turn over and sleep when he was full.