Assign hotkey to change modified date

I'd like to assign a key (F3, which is clear now, i.e. has no function) to do the following
once pressed it should bring up a window that allows me to change the modified date of a file.
The ideal situation would be small window that shows me either current modified date that i can directly edit.

The SetAttr command will do that.

It's bound to Ctrl+B by default. You can edit that via Settings -> Customize Toolbars -> Keys.

Thank you Leo!
Yes, that's indeed exactly what I have been looking for.
Thanks again.