Yeah, peaceful mode is nice and all. But that doesn't change the fact that while I'm building I have to sit in the dark during the night time. I CAN get torches and jack-o-lanterns. But I think just having the setting to make it always high noon or something would be very convenient, saving me the work of finding good spots to put the torches. Just my opinion.
Yea , you can't change it because you are playing single player. IF you always want it Morning , you would have to make a server, buy an account , and make the server alpha. Then that way you can have it always morning.