My DS dropped the 3am feed at about 5.5 - 6 months. So was going from 11pm to 8am by 6 months. And he self weaned that one... He just stopped waking up in the night for it. He tried to reinstate it about two weeks after he dropped it, but I was able to resettle without the boob, and we have not looked back.

But.... after he dropped the 3am feed, I weaned him to a bottle (ff) gradually over the next month...