I have just searched for this topic and here it is. My husband has had dementia diagnosed for a year and has gone downhill fast. Now his body clock is out of sync in a different way. He is sleeping in late nearly every day now and yesterday he didn’t get up until 4pm. I had checked on him a couple of times but he was deeply asleep and I didn’t disturb him because it is simply not worth it because he is disoriented if I do. Every day is the same although yesterday was extreme. He gets up, has some food and drink and then says he must go for his rest. A couple of hours later he gets up and says he would like to go to the pub for a drink, his old obsession. He is still recovering from the cough virus so I persuaded him that it was a bad idea. He watched some television and then was back in bed. I don’t think he is up all night except for toilet breaks, so the bottom line is that he is sleeping about 75% of the time. Does this behaviour ring any bells with anyone else?