DD is 3 (and 3 months).
We potty trained last Christmas - so around 2.5, sort of led by her really and all quite straightforward (cracked wees pretty much immediately, found poos a bit trickier but that was sorted in a couple of weeks). Few accidents when she started school nursery in September but fine again after about a week.
She's nowhere near dry at night though - still wears pull ups for bed (we call them nighttime knickers I can't remember why now!) and they are always absolutely soaked in the morning. She'll wet if she ever has a longer nap in the day too - though that doesn't happen often.
I've no problem with it, am just working on the assumption she's not ready and not in any panic to change it, but I know several of her little friends who potty trained later than her went almost immediately to being dry and night and I'm wondering if I've missed a trick somewhere or I should be doing more to help her with it?
I kind of thought at some point it would just kind of happen by itself - but now I'm doubting myself - did that happen for you or do you have to 'train' them somehow at night too?