New function format_date not showing right time

// Format the date & time accordingly
function showdate($format, $val) {
   global $settings, $userdata;

   if (isset($userdata['user_offset'])) {
      $offset = $userdata['user_offset']+$settings['serveroffset'];
   } else {
      $offset = $settings['timeoffset']+$settings['serveroffset'];
   }
 // Correction for Daylight saving Time
 $dls = 0;
 if (date('I', $val+($offset*3600)) == 1){
 $dls = 3600;
 }

   if ($format == "shortdate" || $format == "longdate" || $format == "forumdate" || $format == "newsdate") {
      return format_date($settings[$format], $val+$dls+($offset*3600));
   } else {
      return format_date($format, $val+$dls+($offset*3600));
   }
}

$lcmerid = explode('|', $locale['meridiem']);