We saw that people experienced difficulty with the authoring date field, they were initially unable to fill in a valid author date. It occasionally took more than two tries to create a valid date field. It looked like most of this came from the fact that the example is rather long and perhaps cryptic.
Another issue we saw, is that people were wondering if they could give it a date set in the future to only show the article on a future date.
There are several ways we could solve the first issue, from pre-filling it with a date to making use of the new HTML5 date/time field.