When a person asks what day it is, the person is trying to keep track of the passage of time.
The regular schedules of self-care and interesting actions requires initiation and prompting by a carer. The sense of time is organisation by the sequence, which is recognised and contributes to the formation of a sense of security. When the next event happens as usual, the person is reassured. Irregularities and nothing to do for hours may be connected to troublesome behaviours.