Your best bet is to download that skin and look at the source code to see how it does what it does. The _main.php file is what you need to look at. The code used to display the date (and locale) is here:

<div class="bSmallHead">
<?php $Item->issue_date('F jS, Y'); ?> <?php // locale_flag( $Item->locale, 'h10px' ); ?>
</div>

Put that code into the _main.php of the skin you're using, right under the title.