Sundowning
My Mother, with vascular dementia, exhibited this almost every day. Starting around 4.30-5pm.
https://www.aarp.org/caregiving/health/info-2017/ways-to-manage-sundown-syndrome.html
We managed this in different ways, which could depend on the time of year, the weather and with various distraction techniques. As her dementia progressed it became more difficult to cope with without medication.
A friends husband would become very agitated . Moving and sometimes damaging furniture in their home.