This is the index.php code:
<?php get_header() ?>
<div id="container">
<div id="content">
<div id="nav-above" class="navigation">
<div class="nav-previous"><?php next_posts_link(__('<span class="meta-nav">«</span> Older posts', 'sandbox')) ?></div>
<div class="nav-next"><?php previous_posts_link(__('Newer posts <span class="meta-nav">»</span>', 'sandbox')) ?></div>
</div>
<?php while ( have_posts() ) : the_post() ?>
<div id="post-<?php the_ID() ?>" class="<?php sandbox_post_class() ?>">
<h2 class="entry-title"><a href="<?php the_permalink() ?>" title="<?php printf(__('Permalink to %s', 'sandbox'), wp_specialchars(get_the_title(), 1)) ?>" rel="bookmark"><?php the_title() ?></a></h2>
<div class="entry-date"><abbr class="published" title="<?php the_time('Y-m-d\TH:i:sO'); ?>"><?php unset($previousday); printf(__('%1$s – %2$s', 'sandbox'), the_date('', '', '', false), get_the_time()) ?></abbr></div>
<div class="entry-content">
<?php the_content(); ?>
<?php the_excerpt(); ?>
<?php wp_link_pages('before=<div class="page-link">' .__('Pages:', 'sandbox') . '&after=</div>') ?>
</div>
<div class="entry-meta">
<span class="author vcard"><?php printf(__('By %s', 'sandbox'), '<a class="url fn n" href="'.get_author_link(false, $authordata->ID, $authordata->user_nicename).'" title="' . sprintf(__('View all posts by %s', 'sandbox'), $authordata->display_name) . '">'.get_the_author().'</a>') ?></span>
<span class="meta-sep">|</span>
<span class="cat-links"><?php printf(__('Posted in %s', 'sandbox'), get_the_category_list(', ')) ?></span>
<span class="meta-sep">|</span>
<?php the_tags(__('<span class="tag-links">Tagged ', 'sandbox'), ", ", "</span>\n\t\t\t\t\t<span class=\"meta-sep\">|</span>\n") ?>
<?php edit_post_link(__('Edit', 'sandbox'), "\t\t\t\t\t<span class=\"edit-link\">", "</span>\n\t\t\t\t\t<span class=\"meta-sep\">|</span>\n"); ?>
<span class="comments-link"><?php comments_popup_link(__('Comments (0)', 'sandbox'), __('Comments (1)', 'sandbox'), __('Comments (%)', 'sandbox')) ?></span>
</div>
</div><!-- .post -->
<?php comments_template() ?>
<?php endwhile ?>
<div id="nav-below" class="navigation">
<div class="nav-previous"><?php next_posts_link(__('<span class="meta-nav">«</span> Older posts', 'sandbox')) ?></div>
<div class="nav-next"><?php previous_posts_link(__('Newer posts <span class="meta-nav">»</span>', 'sandbox')) ?></div>
</div>
</div><!-- #content -->
</div><!-- #container -->
<?php get_sidebar() ?>
<?php get_footer() ?>