Why does the late evening seem like such a free, exhilarating time to me? Is it the same for you?

It is just after midnight here. I was out for the evening and got in about 10pm. This is the time of night when I feel like I have no responsibilities and I am perfectly free to do exactly as I please for as long as I please. I will have to drag myself to bed because I feel like I am giving up freedom when I do, even though I have no obligations tomorrow. It’s something about the night, alone at home. I love it. Do you? WHY?