将此代码段放入function.php, 这应该能满足你的需要。

function my_theme_wp_title( $title, $sep ) {
    global $post;

    /* my other title cases */

    //get post\'s modified date
    $m_date = get_the_modified_date();

    //concatenate the current title with the date string, using the separator to be more clear
    $title .= $sep . " " . $m_date;

    return $title;
}
add_filter( \'wp_title\', \'my_theme_wp_title\', 10, 2 );

干杯

请参考以下内容：

    <?php if (get_the_modified_time() != get_the_time()) : ?>

    <p>Posted: <?php the_time(\'F j, Y\'); ?> at <?php the_time(\'g:i a\'); ?>, 
    Last Updated: <?php the_modified_time(\'F j, Y\'); ?> at <?php the_modified_time(\'g:i a\'); ?></p>

<?php else: ?>

    <p>Posted: <?php the_time(\'F j, Y\'); ?> at <?php the_time(\'g:i a\'); ?></p>

    <?php endif; ?>