Updated date instead of Published date in search results

Hi,

I am trying to do something I though would be simple but I could use your help.

I would like the search engine results to show the updated date snippet for the posts instead of the published date.

Right now, this is what I have in my source code :

<time class=”entry-date published” datetime=”2015-11-12T09:31:51+00:00″>12 novembre 2015</time><time
class=”updated” datetime=”2016-08-19T08:11:27+00:00″>19 ao?t 2016</time>

Can you help ?

Thanks a lot.

Best regards.