I had a friend I swore was chronologically impaired. He had no concept of time at all, would work til four in the morning then sleep til two in the aft - and he owned his own business. Invite him for dinner, he might show up at three, or nine, or the following day. Promised to drive me to a train station once, drove me 300km. because he missed the train time.

He was a really nice man, but the time thing was a real annoyance.