Wordpress Last Updated Date

 Last Update On 

<div class="metabox1"> 

<span class="entry-date"><b>Last Updated On : <?php echo ''. the_modified_date() ; ?></b></span>

</div>

Original Published Date

<div class="metabox1"> 

<span class="entry-date"><?php the_time( get_option( 'date_format' ) ); ?></span>

</div>