This plus … Time as you perceive it, is related to new memories you make. When you’re young, everything is a new experience which in turn becomes a new memory

This plus … Time as you perceive it, is related to new memories you make. When you’re young, everything is a new experience which in turn becomes a new memory. When your 100, to use your example, you’ve done everything there is to do. So no new memories & days blur together.