The `pubdate` attribute is not valid for modern HTML(5). The [h-entry microformat](http://microformats.org/wiki/h-entry) describes an alternative way to achieve the same thing: a `dt-published` class name. Patch: [[!tag patch]] [[!template id=gitbranch branch=jon/html5-no-pubdate-attribute author="[[Jon]]"]] *—[[Jon]], 2020-10-06*