I put my 6mth old DD to bed anywhere between 7-8. She wakes once a night (occaisionally twice) and between 5-6am, and if I'm lucky sometimes 7am. But I think thats because of the sun coming up at 5am now.
With solids, she is still only having one meal per day (breakky), with 5 bottles a day. I am going to increase her solids soon though.
I think putting him down earlier gradually is a good idea, maybe 30mins every few days? Good luck.