Ticket #30864: 30864.patch

src/wp-includes/media.php

@@ -2639 +2639 @@
                 'type'        => $type,
                 'subtype'     => $subtype,
                 'icon'        => wp_mime_type_icon( $attachment->ID ),
-                'dateFormatted' => mysql2date( get_option('date_format'), $attachment->post_date ),
+                'dateFormatted' => mysql2date( __( 'F j, Y' ), $attachment->post_date ),
                 'nonces'      => array(
                         'update' => false,
                         'delete' => false,