Ticket #42394: 42394.3.diff

src/wp-includes/customize/class-wp-customize-date-time-control.php

@@ -109 +109 @@
                 foreach ( array( 'j', 'd' ) as $day_token ) {
                         $date_format = preg_replace( '/(?<!\\\\)' . $day_token . '/', '%3$s', $date_format );
                 }
+                foreach ( array( '%1$s', '%2$s', '%3$s' ) as $required_placeholder ) {
+                        if ( false === strpos( $date_format, $required_placeholder ) ) {
+                                $date_format = '%2$s %3$s, %1$s';
+                                break;
+                        }
+                }
                 ?>
 
                 <# _.defaults( data, <?php echo wp_json_encode( $data ); ?> ); #>