If you think he will be able to fall asleep and stay asleep in his carseat while you're out to dinner, I would just do that. Otherwise, you can slowly start to push his day and night forward in 15 min increments (later bedtime...later wake time). I don't know exactly how that will go over, but if it's want you want you should certainly try. I wonder, though, how the time difference will effect him (although I don't recall where you are located so there may not be one). Then, I wonder what it will be like to retrain him once you return home. Humm, sticky situation. Sorry to ramble.