Custom Post Type Sort

      <?php
          $today = date("Y-m-d 00:00");  //set today's date
          $todaytext = date("l"); // define $todaytext with written out days

      for ($i=0; $i<7; $i++){
          $thedate = strtotime ( '+'.$i.' day' , strtotime ( $today ) ) ;
          $thedate = date ( 'Y-m-d H:i' , $thedate );
          $thedatetext = strtotime ( '+'.$i.' day' , strtotime ( $todaytext ) ) ;
          $thedatetext = date ( 'l' , $thedatetext );
          $future = strtotime ( '+24 hours' , strtotime ( $thedate ) ) ;
          $future = date ( 'Y-m-d H:i' , $future );

     $args = array(
     'post_type' => 'event',
     'orderby'     => 'meta_value',
     'order'       => 'asc',
     'meta_query' => array(
     'relation' => 'OR',
        array(
            'key' => 'opening_time',
            'value' => array($today,$future),
            'compare' => 'BETWEEN',
            'type' => 'DATE'
        ),
        array(
            'key' => 'artist_talk_time',
            'value' => array($today,$future),
            'compare' => 'BETWEEN',
            'type' => 'DATE'
        )
    )
    );

    $event_query = new WP_Query( $args );

    if ($event_query->have_posts()) : while ($event_query->have_posts()) :  $event_query->the_post();

    $keys = array('opening_time', 'film_time', 'artist_talk_time');
    $times = array();  // I tried putting the new array line here but then I got a repeat of the post for everyday
    $custom_field_keys = get_post_custom_keys();
    foreach ($custom_field_keys as $custom_field_key) {

    if (in_array($custom_field_key, $keys))
    {
        $custom_field_value = get_post_meta($post->ID, $custom_field_key, true);

        if ($custom_field_value >= $thedate && $custom_field_value <= $future) {

            $counttest++;
            $times[] = array($custom_field_value, $post->ID, $custom_field_key); // I changed the array here

        }
        }
        }

      endwhile;

     if ($counttest >0) {
      echo $counttest;

      if ($counttest>=2){
      echo ' Events ';
      } // end if ($totalevents>=2) function

      if ($counttest<2){
      echo ' Event ';
      }

      if ($thedate==$today){echo 'Today';}
      if ($thedate>$today){
      echo $thedatetext;}
      echo  '<br>';

      }
      endif;
      $counttest=0;


      sort($times); // I changed the asort to sort here

     foreach ($times as $event) { $time_value = $event[0]; $post_id = $event[1]; $time_key = $event[2];  // changed the foreach here

    if ($time_key == 'opening_time') { ?>

    <li class="sidebar_event">
    <a href="<?php echo get_permalink($post_id) ?>" title="<?php echo get_the_title($post_id); ?>"> <?php echo get_the_post_thumbnail($post_id, 'upcoming_event_sidebar'); ?></a>

    <h2><a href="<?php echo get_permalink($post_id) ?>" title="<?php echo get_the_title($post_id); ?>"> <?php echo get_the_title($post_id); ?></a></h2>
    <h3>Opening</h3>
    <h4><?php echo get_post_meta($post_id,'event_venue', true);?> </h4>
    <h5><?php echo get_post_meta($post_id,'opening_time', true);?> </h5>
    </li><!-- end .sidebar_event -->
    <?php }

    else if ($time_key == 'artist_talk_time') { ?>

    <li class="sidebar_event">
    <a href="<?php echo get_permalink($post_id) ?>" title="<?php echo get_the_title($post_id); ?>"> <?php echo get_the_post_thumbnail($post_id, 'upcoming_event_sidebar'); ?></a>

    <h2><a href="<?php echo get_permalink($post_id) ?>" title="<?php echo get_the_title($post_id); ?>"> <?php echo get_the_title($post_id); ?></a></h2>
    <h3>Artist Talk</h3>
    <h4><?php echo get_post_meta($post_id,'event_venue', true);?> </h4>
    <h5><?php echo get_post_meta($post_id,'artist_talk_time', true);?> </h5>
    </li><!-- end .sidebar_event -->
    <?php }

     else if ($time_key == 'film_time') { ?>
     <li class="sidebar_event">
     <a href="<?php echo get_permalink($post_id) ?>" title="<?php echo get_the_title($post_id); ?>"> <?php echo get_the_post_thumbnail($post_id, 'upcoming_event_sidebar'); ?></a>

    <h2><a href="<?php echo get_permalink($post_id) ?>" title="<?php echo get_the_title($post_id); ?>"> <?php echo get_the_title($post_id); ?></a></h2>
    <h3>Artist Talk</h3>
    <h4><?php echo get_post_meta($post_id,'event_venue', true);?> </h4>
    <h5><?php echo get_post_meta($post_id,'artist_talk_time', true);?> </h5>
    </li><!-- end .sidebar_event -->
    <?php }

     }

      rewind_posts();

      }
      ?>