For people who are forgetful, in danger of becoming isolated (loneliness) and/or are depressed, it is very important to have a structure to the day and to be constantly reminded of tasks and activities. It keeps them attentive and active.
They do not have to apologise because they have forgotten something and so retain their own dignity. Also, such simple things as knowing what day it is, what the weather is like, the most important news, who’s birthday it is, keeps people connected; they participate and feel involved.
By regularly telling them to eat and drink something, malnutrition and dehydration can be prevented. This gets over the problem of elderly people not having a thirst and hunger signal.