i want to know this too! I would like to spend more time with my LO during the day on weekends and be able to like, I don't know go to the park or something!
DS was down to one nap a day by 11 months, so I'd say sometime before that he dropped to two naps a day. DD still sleeps quite a bit, I wouldn't say she has a real nap schedule.
Re: When do LOs usually switch from 3 naps to 2? nft
I would say 6 months probably? I can't remember when it happened for my older son. But I loved the 2 naps a day schedule.
As I am typing this, I realize my 3 mos old only takes 2 naps usually so maybe earlier...