diff -r 490d5cc509ed -r cf61fcea0001 wp/wp-includes/feed-rdf.php
--- a/wp/wp-includes/feed-rdf.php	Tue Jun 09 11:14:17 2015 +0000
+++ b/wp/wp-includes/feed-rdf.php	Mon Oct 14 17:39:30 2019 +0200
@@ -30,10 +30,13 @@
 	?>
 >
 <channel rdf:about="<?php bloginfo_rss("url") ?>">
-	<title><?php bloginfo_rss('name'); wp_title_rss(); ?></title>
+	<title><?php wp_title_rss(); ?></title>
 	<link><?php bloginfo_rss('url') ?></link>
 	<description><?php bloginfo_rss('description') ?></description>
-	<dc:date><?php echo mysql2date('Y-m-d\TH:i:s\Z', get_lastpostmodified('GMT'), false); ?></dc:date>
+	<dc:date><?php
+		$date = get_lastpostmodified( 'GMT' );
+		echo $date ? mysql2date( 'Y-m-d\TH:i:s\Z', $date ) : date( 'Y-m-d\TH:i:s\Z' );
+	?></dc:date>
 	<sy:updatePeriod><?php
 		/** This filter is documented in wp-includes/feed-rss2.php */
 		echo apply_filters( 'rss_update_period', 'hourly' );