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Aaron Bradley posted on Google+ that Google updated their article structure data recommendations for non-AMP articles to recommend you add datePublished and dateModified to non-AMP Article pages.
The recommendations previously read:
The only properties supported for non-AMP structured data are the headline and image properties (and related sub-properties such as image.url).
Now it reads:
The only properties supported for non-AMP structured data are the headline and image properties (and related sub-properties such as image.url), as well as the dateModified and datePublished properties.
Here is his screen shot comparing the two:
So go ahead and add more date details to your article markup if you have not done so already.
Maybe, just maybe, Google will be showing more non-AMP pages in the top stories? Maybe even in the carousel? Maybe?
Forum discussion at Google+.
