The date the feed was last updated, as a standard Python 9-tuple.
As of version 5.1.1, if this key doesn’t exist but
feed.published_parsed does, the value of
feed.published_parsed will be returned.
In the past the RSS pubDate element was stored in updated, but this incorrect behavior was reported in issue 310. However, developers may have come to rely on this incorrect behavior – as was reported in issue 328 – so to help avoid hurting their users’ experience, this mapping from updated_parsed to published_parsed was temporarily introduced to give developers time to update their software, and to give users time to upgrade.
This mapping is temporary and will be removed in a future version of feedparser.