Change post date after the fact

There was a thing you used to be able to do on LJ which was post-date a post. This was basically like queueing it up, so it would appear on people's feeds on the day you wanted it to.

The thing was, you could do this at any time, not just up front.

So if you, perhaps, forgot to put it in the queue for later and accidentally posted immediately, you could go back and edit the post and change the date.

It would be convenient to be able to do the same here for those of us who try to queue up a bunch of posts but may get a little ahead of ourselves before hitting the post button. ;)