The pubdate REQUIRES a date, so e.g. `pubdate="2009-03-24T18:02:14Z"`
+> No, `pubdate="pubdate"`. It's a boolean attribute. applied && [[done]]
+> --[[Joey]]
+>> awesome, thanks for fixing my fix ;) --[[simonraven]]
+>>> This seems to be happening either still or again with version 3.20200202.3-1. I'm getting strings generated like
+>>>
+>>> Posted <time datetime="2007-12-06T05:00:00Z" pubdate="pubdate">Thu 06 Dec 2007 12:00:00 AM EST</time>
+>>>
+>>> which shows up as an error on https://validator.w3.org/ --Luke Schierer
+
+>>>> My reading of Joey's response, above, was that (according to the spec at the time), `pubdate="pubdate"` is what
+>>>> should be generated, *not* `pubdate="timestamp"`, and so what you are seeing is expected. However, looking at
+>>>> the *current* Spec (linked elsewhere in this page), `pubdate` is not actually a valid attribute any more at
+>>>> all. And indeed, running my own blog through the Validator, I see:
+>>>>> `Error: Attribute pubdate not allowed on element time at this point.`
+>>>> *— [[Jon]], 2020-10-05*
+
+>>>>> I've filed a separate bug page for this, since this one is already
+>>>>> marked *done*: [[bugs/pubdate_not_valid_for_html5]]. I've filed a
+>>>>> patch. *—[[Jon]], 2020-10-06*
+
Otherwise the XML parser chokes.
<http://www.whatwg.org/specs/web-apps/current-work/multipage/text-level-semantics.html#attr-time-pubdate>