9 1/2 month old and naps

[chibi]

does anyone know when babies go from 2 to 1 nap a day?
TIA

No definite answer as all babies different. But as your baby now on solids and will have a lunchtime, you can out him/her down directly after this lunch and try to get that as an established sleep time.
My third baby was fond of three naps for quite a while, but once you can get a longer nap established the others can get dropped. Another approach to the after lunch slot is to encourage the longest of the current naps. Say thats before lunch and after a milk feed thats ok as your baby's mealtimes will still be shifting about.
but to be honest I always just go with the child, nothing wrong in two naps. Have never followed a routine, but it can help for you to know when the major rest slot will come.
if your baby is going into any kind of daycare situation soon that can regularise the napping, and you can try to stick to the same routine at home.
I would say generally by about 1 year most are on 1 nap, except for those that NEVER nap

some babies have 2 naps up to 15/18 months. my dd went to one at around 11 months and ds was around 13 months.

My DS is 9mo and has 2 naps at home around 9.30 and 1.30.

But at nursery(2 days/week) he tends to have one nap after lunch when they put all the babies down.

So he can do both but with my DD we waited til she was 12mo before going to 1 nap. I guess it depends what fits your daytime routine and how grumpy your LO would get on 1 nap.