Mom is 88 years old and forgets what day of the week it is sometimes. We visited her cousin that has dementia. A therapist told him to put a calendar up and mark the day off at the end of each day, and to refer to the calendar as needed. Mom put a calendar up and uses it in the same manner. She said it makes her feel good to be operating on her own, as much as possible. She says she has no intentions of giving in to the aging process, without a skirmish.