I think he has just been raided too much by someone and is sick of the attacks.
Also,No Kim you are wrong. If you get invaded,and your soldiers are fighting for their homeland, almost every one will be up days or sometimes even weeks at a time. If not for their country, for the fact that they are scared shit less lol.
Edit: But yeah Petra is right,6 months per in game day on LU, 3/4 on the other worlds. Yeah,they are sleeping plenty while you are.