Soldato
My 4 month old has a bath about 8-8.30pm and a feed straight after and he's sleeping through the odd night, but if he does wake it's about 1 or 2am where we just give him a feed and he goes back off to sleep. We keep light low and to a minimum when he's supposed to be asleep etc and it seems to work.
He's breast fed so he naturally wakes up regularly anyway. Right now though he actually won't settle unless you're holding him. Waaaah