I go to bed anywhere between 9 and 11pm (ish). It all depends on how DS2 is sleeping until then. If I am lucky enough that he hasn't woken then generally I use that time for myself. But if he wakes like he has been lately) 1-2hourly or so then I go to bed early because I know it will be a long night. DD and DS1 wake through the night too, though they are getting better at not waking, thank goodness! I *should* go to bed early every night, but I just can't do it and need that time in the evenings to myself to unwind and just be.
We wake at 5am usually. DS2 is allergic to sleep and wakes at this ungodly hour, just because. I try everything to get him back to sleep, but I have no luck, 5am it is! The big kids usually sleep later, this morning they weren't up until 6.15 and 6.50.
I am so not a morning person and usually just change DS2 and then veg on the lounge until at the earliest 6.30am when I will get the kids some breaky and me a BIG hot coffee! They all have some milk when they get up, the big kids help themselves and DS2 has booby, though he has soy milk in his sippee cup then too if he wants it.
When DH is home (ie not working) we take it in turns to sleep in. I often pass out until 9/10am because my body is trying to catch up on sleep! That is also usually the first time in a week that I will get more than 2hrs sleep in a row. I do really struggle with the sleeplessness and I am a person who needs alot of sleep to feel good. I am getting a bit used to it now (5yrs later!!) but it still gets to me sometimes. Thankfully DH can work with minimal sleep.
Pre kids, bed time was usually 11-12 and wake ups were between 5.45 and 8am depending on my work shifts. Weekends a sleep in was until about 9am. Though we would often just laze about in bed or go down to the shop, get food and come home and go back to bed! Oh, the luxury!!