#5108 Add datetime attribute to <time> elements (#5199)

* #5108 Add datetime attribute to <time> elements

* fix eslint errors

webapp/components/rhs_comment.jsx

@@ -478,7 +478,10 @@ export default class RhsComment extends React.Component {
                             </li>
                             {botIndicator}
                             <li className='col'>
-                                <time className='post__time'>
+                                <time
+                                    className='post__time'
+                                    dateTime={Utils.getDateForUnixTicks(post.create_at).toISOString()}
+                                >
                                     {Utils.getDateForUnixTicks(post.create_at).toLocaleString('en', timeOptions)}
                                 </time>
                                 {flagTrigger}