I have always tried to follow DS1's cues for when he needs to nap, and he seems to settle into a nice routine for a few months and then it changes.
He currently wakes up at around 0630 every day, and seems to need to nap at around 1030am for 30-40 mins, and then another nap late afternoon around 3pm for an hour or so.
I think this afternoon nap is too late as it's stopping him going to sleep nice and easily at 7pm like he used to when both his morning and afternoon nap were earlier (more like 0930 and then 1330).
What does your 12mo do? Am I getting this wrong? Should I try and cut out the morning nap?? He is usually crying and tired by 1030am/11 at the latest, not sure I can get him through till after lunch :-(