vim-scraper/vim-scraper.github.com — Issue #15: <time> elements are invalid
Author: bronson
Created: 2011-10-23 19:50:53+00:00
State: open

Here's an example from http://vim-scripts.org/news/2011/06/12/rss-gone.html

23 Jun 2011

The datetime attribute needs to be formatted like this: http://www.whatwg.org/specs/web-apps/current-work/multipage/common-microsyntaxes.html#valid-global-date-and-time-string