%2$s';
if ( get_the_time( 'U' ) !== get_the_modified_time( 'U' ) ) {
$time_string = '';
}
$time_string = sprintf( $time_string,
esc_attr( get_the_date( 'c' ) ),
get_the_date(),
esc_attr( get_the_modified_date( 'c' ) ),
get_the_modified_date()
);
echo $time_string;
?>