<?php

  	$loop = new WP_Query( array(
    		'showposts' => 5,
    		'post_type' => 'eventdate',
    		'category_name' => X,
		'orderby' => 'meta_value',
		'meta_key' => 'CUSTOM-FIELD-NAME'
    		)
    		);
  	while ( $loop->have_posts() ) : $loop->the_post(); ?>
   	<div>
      		<h2><a href="<?php the_permalink() ?>" title="<?php the_title_attribute(); ?>"><?php the_title(); ?></a></h2>
    	</div>
  <?php endwhile; ?>