query_posts in subcategory (future years)

i’m trying to get a display of posts in future years. it does not work with nested categories. is there anyway around this?

this is the code i am using:

<?php $temp_query = $wp_query; ?>

<?php query_posts('category_name=festivals&year=2006'); ?>

<?php while (have_posts()) : the_post(); ?>
<a href="<?php the_permalink(); ?>"><?php the_title(); ?></a> On: <?php the_date(); ?>
<?php endwhile; ?>

<?php $wp_query = $temp_query; ?>

this is giving me a list of titles, and dates in 06, but only for a top-level category, not a sub-category.

is this because i am working with future dates?