Thread:Project:Support desk/Creating a partial fork of Wikipedia

I've had a plan for a long time about making a history encyclopedia that is reliable, yet less intense than Citizendium. I think it would be good to start by forking and attributing content from Wikipedia. Is there a way that attribution notices can be automatically added to articles? I'm thinking some sort of extension or JavaScript that adds a notice to the bottom of a page if it's older than a certain date.

I suspect that there might also be extensions, CSS, templates, and JavaScript that would also need to be imported.