the_date() problem after get_posts()

I use custom template for one page and I recently encountered a little problem with the_date(). $cat[0] is a string containing name of the category.

$myposts = get_posts('numberposts=-1&category_name='."$cat[0]".'&orderby=date&post_status=&offset=1');
	foreach($myposts as $post)
	{
		setup_postdata($post);
		/*(...)*/
		the_title();
		the_permalink();
		the_date();
		echo $post->post_date;
	}

the_title gives right output – title. Permalink also shows up, but the_date() gives no result for one post – it works fine for all others. It’s even more interesting that $post->post_date contains correct data for this post.
At the moment I “hacked” this and I use date('Y-m-d', strtotime($post->post_date)) which gives expected results, but still there’s something wrong either with my code (??) or with the_date() function.