How can we create a Time Based Assignment Rule by alternative way?

Hi All,

How can we create a Time Based Assignment Rule by alternative way?

We have scenario is that we have to creating a scheduling system that a person would have to work 5 days in a week. I am trying to eliminate case age after the 5th day for the case that was assigned to them on the 6th and 7th day.How can I create a function that will allow me to transfer the assigned cases to the other user on his/her 6th and 7th day?

Thank you in advance.