I agree with Linda. My mother-in-law would get aggitated in the evening, especially as it was getting dark earlier. I tried to track the times it happened and what we had or had not done that day. It was usually happening on the weekends and M-F she was fine. The answer.....during the week we always had her take a nap, but on the weekends I tried to keep her up! Once we stuck with the routine of having her take a nap on the weekends too, the issue virtually went away. When she did not get a nap, she always wanted to "go home". Since we were in her home, this was very stressful for me to deal with. For some reason, this is the one request she makes that I find the most difficult to deal with, because there is nothing I can do. I really do believe in the notion, at least for my mother-in-law, that she has worked so hard during the day to "keep it together", that by evening she just can't do it any more. I know for others this is not necessarily the answer, but it has been a life saver for me.