We have had a bedtime of 7-730 since she was around 6 weeks old, and ther routine has pretty much stayed the same. On some nights if we are out, or if she wakes late etc it might be a tiny bit later but not very often. Even when she was demand fed and fed 3 hourly early on, we had this bedtime, and routine, and every feed between 7-7 was treated as a quiet night feed with dim lights and no noise etc... I think it is very reasonable to have this time as a bedtime especially as they get older. Good luck with it!