public static function convertSingleStringDate($date)
{
if ($date == '000000') {
return $date;
}
$day = substr($date, 0, 2);
$month = substr($date, 2, 2);
$year = '20' . substr($date, 4, 2);
return Carbon::createFromDate($year, $month, $day)->format('d/m/Y');
}