When does your baby sleeps through the night?

I think my 1st bb was around 5 mths. u need to talk to the bb to ask him drink more during last feed around 10 plus 11pm. then tell him wake up at 5 plus 6am. in btw wake up no feed. this is what my neighbour teach me and it works. keep talking to bb everynight b4 sleep now my 2 mths plus bb last feed 11.30pm and wakes up around 4plus for milk. trying to stretch his timing too. we also try to feed more at last feed.