Recently in the Google webmaster blog, Google revealed how they are reading the date of the page, and how you should optimize it in the right way to display correct date and time.
Google not showing dates for the all the pages but there are Google’s automated systems that decide to display a date and time according to a page, it included news and time-sensitive data.
Moreover, Google using several factors to show dates, primarily it shows date from the published page as it mentioned or dates provided by the publisher through structured markup.
But as Google told in the webmaster blog, sometimes it is not getting the trust of published dates on a page, because structure data may be lacking or not matched with current time zone. And, that is why Google Systems using several factors to show a correct date on the page when the page was published or updated.
In order to help Google, webmaster and website publisher should consider these two methods.
Show a Date: Show a visible date clearly on the web page
Using Structure Data: Optimizing the ‘datePublished’ and ‘dateModified’ schema with the correct time zone. And when you are using a structure data, make you follow up ISO 8601 format for dates
In order to show a correct date in the Google news, you have to clearly show the date and time when was page published and updated. And it is recommended by Google to show structure data along with the displaying date and time.
However, According to Google time and date should be placed between headline and article body.
Moreover, there are other rules if you are updating your page frequently, as it is recommended by Google to give a fresh date and time that updated an article.
Other caution that you have to prevent while updating a page that not to add slightly story from one previously published or delete the story and redirect to new URL. It is completely against of Google URL guidelines.
Above I have described the most important requirements According to Google, now we have try other additional methods to optimize date and times.