Ticket #34228: 34228.patch

wp-includes/date.php

@@ -992 +992 @@
                 $format = $time = '';
 
                 // Hour
-                if ( $hour ) {
+                if ( isset( $hour ) {
                         $format .= '%H.';
                         $time   .= sprintf( '%02d', $hour ) . '.';
                 } else {