Grouping posts by date

I found the solution here:

http://pt.forums.wordpress.org/topic/separa-posts-por-data

The code:

$olderDate = null;
			while(have_posts()) {
				the_post();
				if (get_the_date() != $olderDate) {
					$olderDate = get_the_date();
					echo $olderDate.'<br/>';
				}
				?>
				<br/>-<a href="<?php the_permalink(); ?>"><?php the_title() ?></a>
				<?php
			}