Bugzilla – Bug 852
check that datetime value has a date part if pubdate is specified also
Last modified: 2011-08-01 08:13:39 CEST
The current spec says that the value of the datetime attribute on the time element must be a “valid date string with optional time” if the pubdate attribute is also specified.
https://bitbucket.org/validator/syntax/changeset/3963fdd72308