Mine usually go outside at night between 11-12. They sleep all night without any problems. Usually I let them around 7 in the morning. If it's a morning I have to work then I get up and get ready then take them out around 7, just before I leave. If it's a morning I'm not working then I usually still let them out around 7 because I'm up getting Justin ready for work.

Nacey, Bitsy, and Buster could sleep until noon (or later) with no problems, they have lazy bones. Nova and especially Charlie don't like to sleep in too late and will wake me up if I sleep too late on the weekends. 7:30- 8 is the latest Charlie will let me sleep. I'm normally up by then anyway.