Autoarchiving of individual news articles?

I have been using UTF-8 CN 9.1 for some time now and it covers my needs almost perfectly.
There is only one thing I miss and I haven't sofar found any existing hack for it.

I would like some news articles to be permanent and some should be archived automatically when a specific date for that news article is reached.

Has anyone seen such a hack or is it actually possible to do with existing UTF-8 CN 9.1?