We have been in this transition since Aari was 12 months old--that was almost 2.5 months ago. She was showing all the signs, and we tried to push her am nap toward the evening.
Yeah...that went real well...
She began night waking being a general grump all day, which is not typical of her.
What we ended up doing is giving her a modified morning nap. She starting waking up at 5 am and wouldn't go back to sleep, so at around 8 am we would put her down and let her sleep no later than 9:30 (yes, that often means waking a sleeping baby...). Then we would give her a second nap sometime around 1-2 pm. This would set her up for bedtime somewhere between 7 and 8 pm. This has been working out for the past few weeks. If she sleeps in until 7 am or later, we just keep her up until 11:30 or so for her 1 nap. The problem we're running into with the early waking is that she's not getting enough night sleep, and is trying to make it up during the day. Continuing to give her 2 naps until she adjusts her night schedule to something more reasonable morning wise is the only solution we could come up with. I know eventually it will--she got up at 7 am this morning, which is a good sign that she's at least starting the adjustment (finally). In the past, we were putting her to bed between 6 and 7 pm, but with her nap schedule the way it is, we don't have a choice but to put her to bed between 7 and 8.
It's typical during this time that they begin fighting naps--after all the transition to 1 nap a day is really hard on them. There's bound to be reprocussions somewhere for awhile. Don't fret...this process often takes several months to work itself through, and it becomes a matter of experimentation. You feel like you're taking one step forward then two steps back, it almost feels like they teeth for 3 months. Most babies transition somewhere between 12 months and I believe 16-18 months, some a little earlier, some a little later. Add teething and sickness to the mix and some days it's a nightmare (in which case, the mighty Dimatap for children is a lifesaver).
Just wanted to give a little bit of encouragement, although I'm not sure how much I can give
*HUGS*
Sonya =P