[Redoubts]

I'd rather not see these kind of posts stop. Frequently, there's a good reason to post an older article on a particular day, and calling it out helps bring out the new modern context. Otherwise, reminding readers that a submission happened in a different environment from today is worth while on its own.

[angersock]

Then the author should leave a comment explaining the significance of the day...otherwise, these posts tend to just clutter things up.

[Redoubts]

Or HN could just have comment folding baked in. There's more than one way to solve this problem :^)