B..
12 months. He went from a morning and afternoon nap, down to a long afternoon nap. I kept him awake in the morning and gave him lunch a little earlier, then put him down for a nap. He was sleeping the same amount of time, just with one instead of two. You just need the same amount of time, correct? If I were you, I would skip the morning nap and put him down around lunchtime. You will likely get the same amount of sleeping time from him, but just in one nap.