"datePublished" Error on " google Structured Data Testing Tool "

Unfortunately, I have no idea how to help you on that. WP is pretty much based on the normal date and the datePublished is gotten directly from WP function call and you can see it here https://github.com/lesterchan/wp-postratings/blob/master/wp-postratings.php#L1262

So this is a plugin conflict and it is unlikely it will be solved.

Hello
thanks for your reply
but the ” Yoast WordPress SEO plugin ” can generate normal date :

<meta property=”og:updated_time” content=”2015-08-12T10:45:40+04:30″ />
<!– / Yoast WordPress SEO plugin. –>

Interesting, maybe he is using his own function instead of WP default time function

You can try replacing wp-postratings.php line 1262

From
$post_meta .= '<meta itemprop="datePublished" content="' . get_the_time( 'c' ) . '" />';
To
$post_meta .= '<meta itemprop="datePublished" content="' . mysql2date( 'c', $post->post_date ) . '" />';