Schedule User to be Deactivated

It would be great to be able to schedule when a user needs to be deactivated, For example. when we have an employee leave our company, I have to go in and mark them as deactivated and then make sure their active tasks are all cleared out/switched over to other employees. It would be great to be able to schedule the deactivation for 5:00 PM on their last day, rather than me trying to remember to go in and do it at the end of that day. I would hate to deactivate them too soon, or to not deactivate them in time, and have items accidentally assigned to that person.