Show Feedback Date

Hi Everyone.

I have a tutor who want's to be able to see the date he left feedback on an assignment. Ideally he'd like to be able for his feedback date to be sortable in date order.

It doesn't look like this is a current capability of feedback and as a PHP noob I'm not sure where in the files I'm looking to see if I can add this myself.

Any suggestions anyone?

Thanks, Sam.