My mom, who has moderate dementia, has started getting up, occasionally, in the middle of the night, thinking it is morning. I have placed a card with 7:00 printed on it, so she can see the 7 and compare it with the clock in her room. I have suggested she not get up unless her clock has a 7 as the first number. This seems to be beyond her comprehension and the fact that it is dark outside during the night means nothing to her. Does anyone have a suggestion how I can help her with this? Thank you.