Index: src/wp-includes/widgets.php
===================================================================
--- src/wp-includes/widgets.php	(revision 42434)
+++ src/wp-includes/widgets.php	(working copy)
@@ -1510,9 +1510,9 @@
 		if ( $link == '' ) {
 			echo "<li>$title{$date}{$summary}{$author}</li>";
 		} elseif ( $show_summary ) {
-			echo "<li><a class='rsswidget' href='$link'>$title</a>{$date}{$summary}{$author}</li>";
+			echo "<li><a class='rsswidget' href='$link' target='_blank'>$title</a>{$date}{$summary}{$author}</li>";
 		} else {
-			echo "<li><a class='rsswidget' href='$link'>$title</a>{$date}{$author}</li>";
+			echo "<li><a class='rsswidget' href='$link' target='_blank'>$title</a>{$date}{$author}</li>";
 		}
 	}
 	echo '</ul>';
Index: src/wp-admin/includes/dashboard.php
===================================================================
--- src/wp-admin/includes/dashboard.php	(revision 42434)
+++ src/wp-admin/includes/dashboard.php	(working copy)
@@ -1263,7 +1263,7 @@
 				<div class="event-info">
 					<div class="dashicons event-icon" aria-hidden="true"></div>
 					<div class="event-info-inner">
-						<a class="event-title" href="{{ event.url }}">{{ event.title }}</a>
+						<a class="event-title" href="{{ event.url }}" target="_blank">{{ event.title }}</a>
 						<span class="event-city">{{ event.location.location }}</span>
 					</div>
 				</div>