We hear her go into the kitchen and start fixing "breakfast". This can happen at 11:30 pm when she's only been in bed an hour or so, or in the early hours of the moring, like 2 or 3 am. We tell her it's the middle of the night and she needs to go back to bed. She'll go, usually. But the next day she uses the excuse that she can't read the clock right. She can during the day, we've tested. But when she wakes in the night like that it's as if she has no concept of the time or how much time has passed. She's also started talking about it being "almost Christmas". It is May, and we can't get that across. Any suggestions or is this type of muddled behavior normal for an 87 year old?