Display Today post's in homepage

I have a website with daily more than 10 post’s. I have modified my recent posts to 20 in setting, so I cant use recent post’s code to show up my website today posts.

I found this code to show my site today posts in home page:

<?php
// the query
$today = getdate();
$query = new WP_Query( 'year=' . $today["year"] . '&monthnum=' . $today["mon"] . '&day=' . $today["mday"] );
?>
<?php if ( $the_query->have_posts() ) : ?>
<!-- the loop -->

<h2><a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>"><?php the_title(); ?></a></h2>

<?php else:  ?>
  <p><?php _e( 'Sorry, no posts matched your criteria.' ); ?></p>
<?php endif; ?>
<!-- end of the loop -->

but it doesn’t work.

could you please anyone of friends help me?