How to show upload date fore each file
I fixed it using this solution
https://www.drupal.org/node/1578484

function mytheme_file_formatter_table($variables) {
  $header = array(t('Attachment'), t('Size'), t('Date'));
  $rows = array();
  foreach ($variables['items'] as $delta =&gt; $item) {
    $rows[] = array(
      theme('file_link', array('file' =&gt; (object) $item)),
      format_size($item['filesize']),
      format_date($item['timestamp'], $type = 'short'),
      );
  }
  return empty($rows) ? '' : theme('table', array('header' =&gt; $header, 'rows' =&gt; $rows));
}