Cómo obtener fechas de publicaciones

<?php
/**
 * Single book template for the Now Reading plugin.
 *
 * @package Suffusion
 * @subpackage NowReading
 */

get_header();
global $nr_id, $suffusion_unified_options;
foreach ($suffusion_unified_options as $id => $value) {
	$$id = $value;
}
?>

<div id="main-col">
<?php suffusion_before_begin_content(); ?>
	<div id="content">
<?php suffusion_after_begin_content(); ?>
        <div class="post fix nr-post">

<?php
if( have_books(intval($nr_id)) ) {
	while ( have_books(intval($nr_id)) ) {
		the_book();
?>
        <h1 class="posttitle"><?php book_title(); ?></h1>

			<div class="rating">
				Rating: <?php echo book_rating(false); ?>
<!--				<img src="<?php bloginfo('template_directory')?>/images/<?php book_rating() ?>.png" height="20px" title="Rating: <?php book_rating()?>" alt="Rating: <?php book_rating()?>" />-->
			</div>
<?php
		if( can_now_reading_admin() ) {
?>
			<div class="edit">
				<a href="<?php book_edit_url(); ?>">Edit this book</a>
			</div>

			<div class="manage">
				<a href="<?php manage_library_url(); ?>"><?php _e('Manage Books', NRTD);?></a>
			</div>
<?php
		}
?>
		</div>

		<div class="bookentry fix">
			<div class="stats">
				<a href="<?php book_url(); ?>" title="<?php if (!is_custom_book()) { ?>Buy <?php echo esc_attr(book_title(false));?> from Amazon<?php }?>"><img src="<?php book_image(); ?>" alt="<?php echo esc_attr(book_title(false)); ?>" /></a>
				<br/>
				<p>
<?php
		if ($suf_nr_single_added_show == 'show') {
				echo $suf_nr_single_added_text;
				echo book_added(false);
?>
				</p>
				<p>
<?php
		}
		if ($suf_nr_single_started_show == 'show') {
			echo $suf_nr_single_started_text;
			echo book_started(false);
?>
				</p>
				<p>
<?php
		}
		if ($suf_nr_single_finished_show == 'show') {
			echo $suf_nr_single_finished_text;
			echo book_finished(false);
?>
				</p>
				<p>
<?php
		}
		if ($suf_nr_single_meta_show == 'show') {
?>
					<?php print_book_meta(0); ?>
<?php
		}
?>
				</p>
			</div>

			<div class="review">
<?php
		book_review();
		if(book_has_post()) {
?>
				<p>This book is linked with the post <a href="<?php book_post_url() ?>">&ldquo;<?php book_post_title() ?>&rdquo;</a>.</p>
<?php
		}
?>
			</div><!--/.review -->

		<?php
			$tags = print_book_tags(false);
			if (trim($tags) != "") {
		?>
			<div class="post-footer fix">
				<span class="tags"><?php _e('Tagged with: ', 'suf_theme'); print_book_tags(1); ?></span>
			</div><!--/.post-footer -->
		<?php
			}
		?>
		</div><!-- bookentry -->
<?php
	}
}
else {
?>
		<h2 class='posttitle'><?php _e("Not Found", "suf_theme"); ?></h2>
		<div class='entry'>
			<p><?php _e("Sorry, but you are looking for something that isn't here", "suf_theme"); ?></p>
		</div>
<?php
}
//library_search_form();
?>

<!--		<p><a href="<?php library_url() ?>">&larr; Back to library</a></p>-->
	</div><!-- post -->

	</div><!-- content -->
</div><!-- left-col -->

<?php
get_footer();
?>

<?php
/**
 * Core file required with every WP theme. We have files for everything else.
 * So this is essentially the landing page if nothing else is set.
 * This is also the file used for archives.
 *
 * @package Suffusion
 * @subpackage Templates
 */

global $suffusion_unified_options;
foreach ($suffusion_unified_options as $id => $value) {
	$$id = $value;
}

get_header();
suffusion_query_posts();
?>
	<div id="main-col">
<?php suffusion_before_begin_content(); ?>
		<div id="content" class="hfeed">
<?php
if ($suf_index_excerpt == 'list') {
	if (!function_exists('get_template_part')) {
		include_once(TEMPLATEPATH . '/layouts/layout-list.php');
	}
	else {
		get_template_part('layouts/layout-list');
	}
}
else if ($suf_index_excerpt == 'tiles') {
	suffusion_after_begin_content();
	if (!function_exists('get_template_part')) {
		include_once(TEMPLATEPATH . '/layouts/layout-tiles.php');
	}
	else {
		get_template_part('layouts/layout-tiles');
	}
}
else {
	suffusion_after_begin_content();
	if (!function_exists('get_template_part')) {
		include_once(TEMPLATEPATH . '/layouts/layout-blog.php');
	}
	else {
		get_template_part('layouts/layout-blog');
	}
}
?>
      </div><!-- content -->
    </div><!-- main col -->
<?php
get_footer();
?>

<?php
/**
 * Core class for Suffusion. This holds the options for the theme.
 *
 * @package Suffusion
 * @subpackage Functions
 */
class Suffusion {
	var $context;

	function init() {
	}

	function get_context() {
		if (is_array($this->context)) {
			return $this->context;
		}

		$this->context = array();
		if (is_front_page()) {
			$this->context[] = 'home';
		}

		if (is_home()) {
			$this->context[] = 'blog';
		}

		if (is_singular()) {
			global $post;
			$this->context[] = 'singular';
			$this->context[] = "{$post->post_type}";
			if ($post->post_type == 'page') {
				$page_template = get_page_template();
				if (strlen($page_template) > strlen(TEMPLATEPATH)) {
					$page_template = substr($page_template, strlen(TEMPLATEPATH) + 1);
				}
				$this->context[] = $page_template;
			}
		
}
		else if (is_archive()) {
			$this->context[] = 'archive';
			if (is_date()) {
				$this->context[] = 'date';
			}

			else if (is_category()) {
				$this->context[] = 'taxonomy';
				$this->context[] = 'category';
			}
			else if (is_tag()) {
				$this->context[] = 'taxonomy';
				$this->context[] = 'tag';
			}
			else if (is_author()) {
				$this->context[] = 'author';
			}
		}
		else if (is_search()) {
			$this->context[] = 'search';
		}
		else if (is_404()) {
			$this->context[] = '404';
		}

		return $this->context;
	}
}

?>