Simplepie RSS

I’m using SimplePie to display an RSS feed in WordPress. For some reason the get_date() function is returning nothing? Here’s my code below. Could it be an issue with my feed?

[ Mod note: it’s the backtick character for code not the single quote. Or use the code button, that works too. ]

<h3><span class="dark-blue">news</span> & media</h3>

<ul>
<?php $feed = fetch_feed( 'https://dgpp.ie/dgppnews_rss.xml' );
foreach ( $feed->get_items() as $item ) {
    printf( '
<li><a href="%s"><strong>%s</strong></a>', $item->get_permalink(),
    $item->get_title() );
    printf( '<p>%s</p>', $item->get_description() );
    printf( '<p>%s</p>', $item->get_date() );
    printf( '<a href="%s">read more</a></li>
', $item->get_permalink() );
}
?>
</ul>