How do I edit a Sprint End date of a completed sprint in the UI, not via the database?

[Ragan Sossaman]

We had a sprint that closed but the user forgot to actually complete the sprint until the next day.  It appears the end date gets automatically set when you complete the sprint and there is no option to change the end date of a completed sprint.  We need to set the end date back by one day as that is when the sprint ended.  Can this be done in the UI somewhere?

[Ops]

Any ideas anyone? Hiding the input box is not as important as applying this to multiple fields...