"2012-03-18Z" isn't a valid datetime; drop the "Z"
"00:00:00Z" isn't a valid datetime; drop the "Z"
Drop invalid "Z" from some more date values.
Merge branch 'datetime' into dev
Drop some more invalid "Z"s in datetime year vals
Merge branch 'datetime' into dev
Remove test with known invalid datetime value.
Merge branch 'invalid' into dev
Make <time> text content a valid datetime value.
Merge branch 'datetime' into dev