We work in a weekly sprint logic and we display our tasks based on the due date, but we don't want to see on which day the task is finished, but in which week it is finished.

This makes it easier for us to plan our week, to lead and to react more flexibly. When we plan on a daily basis, we often have to reschedule.

Alternatively, the formula field can also be added to the “Group by”, then I can calculate the week.