[Mediawiki-api] Know when an article was added to a category?

[S. Nunes]

Hi,

Is it possible to know using the MediaWiki API when an article was
added to a given category?
More specifically, I'm looking for the dates when featured articles
where labeled as featured.

If this turns out to be impossible via the API, how can this
information be obtained otherwise?

Thanks in advance for your comments,
--
Sérgio Nunes