My little guy is just 23 weeks today (almost 6 months) and is strictly breastfed (we'll be trying solids in the next couple of weeks). He also goes to bed between 6 and 7, wakes once at around 1 am to feed then sleeps until between 5 and 6 am.
I'm worried about the time change as well - that he'll be waking at 4 am for the day! He is not a very good napper (still has 3 - 4 naps a day anywhere from 30 minutes to one hour if I'm lucky) and because of this he has a hard time making it to a 7 pm bedtime. I've tried to put him down later but he just is so tired most days that I can't. Plus I've heard that putting them down later doesn't necessarily make then wake up later.
Although perhaps over 2 weeks they would adjust to the new schedule?
Up until his 4 month growth spurt he had been sleeping through the night from about 11 weeks (so nice but those days are gone).
I'm really not sure what to do about the time change either other than just keep him up an hour later and let him adjust over a 2 week period or something. Suffer throught it?