Empty Date Returned on my function

I am using this function to display the date and title of my latest posts on my dashboard.

However for some of the posts the date is not being displayed at all – I have a feeling this might be the posts which I subsequently hit the “update” button but i am not sure.. any ideas why this happens?

function wps_recent_posts_dw() {
?>
   <ol>
     <?php
          global $post;
          $args = array( 'numberposts' => 10, 'post_type' => 'any' );
          $myposts = get_posts( $args );
                foreach( $myposts as $post ) :  setup_postdata($post); ?>
                    <li> (<? the_date('j M, Y @ G:i'); ?>) <a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></li>
          <?php endforeach; ?>
   </ol>
<?php
}

function add_wps_recent_posts_dw() {
       wp_add_dashboard_widget( 'wps_recent_posts_dw', __( 'Recent Posts' ), 'wps_recent_posts_dw' );
}
add_action('wp_dashboard_setup', 'add_wps_recent_posts_dw' );