So my DS is 3 now, can go straight through without a nap, but because of one thing and another, and I guess what has suited us until now, plus I am a SAHM and he is yet to start nursery, he was going to bed around 8.30pm, but since we moved and on own juggling it all, it's 9pm ish, I think 8.30 is reasonable if we can get back to it.
But the issue is he can go all day and stay awake, then wants to sleep at 6pm! Well that is too early for the night, and certainly too early to even try to make in to a new bed time, if you was out and then have to come back and make tea, it is too late!
But he wants to have a sleep then, then wake up and would then be up as he has been until 11-12pm!
If he doesn't fall asleep and sometimes it's hard to stop him, he will go down to sleep at his usual sort of time.
I'm inclined to leave it in one sense and it means he is rested and just has to have a longer evening, and I can cook etc in leave, but then worry because although I know it would all change in the future once he is in day care etc, it's not practical for him or for me, far too late for him to eventually want to sleep again for the night, and means I have to stay up right until the end then am exhausted.