Or 2am, for that matter.
I find this to be a serious drawback to civilized society, and am somewhat dissatisfied with the whole early-early-early-morning conversation situation.
That is all.
[Edited to add: Yes, I know, several of you have said "call anytime even if it's in the middle of the night," but I'm not sure I could make myself do that unless it were an emergency. :-)]