Splitting posts by date is hand for blog or article WordPress sites and segments posts making it easier to navigate/scroll through posts chronologically. In particular segmenting posts by date is handy for the homepage, category pages and/or tag pages.
So depending on how your theme works, you will need to edit your theme in order to split the posts by date. So for example on the The Web Taylor Help site, the homepage demonstrates this technique. So the loop on the index.php file should look similar to this:
<?php if ( have_posts() ) { while ( have_posts() ) : the_post(); ?> <div class="post" id="post-<?php the_ID(); ?>"> <?php the_date('jS F Y', '<div class="date_wrap"><span class="the_date"><span>', '</span></span></div>'); ?> <h2><a href="<?php the_permalink() ?>" title="<?php the_title(); ?>"><?php echo $featured; the_title(); ?></a></h2> <?php the_excerpt(); ?> </div> <?php endwhile; } ?>