We let Bittybartfast stay up as late as she wants. Babybartfast has a bedtime because she has to be off to kindergarten in the morning, but Bittybartfast stays up until she gets sleepy (which she communicates by rattling the baby gate to go upstairs to her room) or she starts fussing. Sometimes that's nine or ten o'clock. The nice thing, though, is that she sleeps in until mid-morning. I do my best writing after midnight - not sure why, but that seems to be how I'm wired - so I stay up late to work most nights. DH gets Babybartfast off to school early, then leaves for work, then Bittybartfast and I get up a few hours later. It kind of feels like I'm working second shift, but I'm really glad both my girls are night owls like me!