public function selectTimezone($name, $selected = null, $options = array())
{
$list = [];
$utc = new \DateTimeZone('UTC');
$dt = new \DateTime('now', $utc);
foreach (\DateTimeZone::listIdentifiers() as $tz) {
$current_tz = new \DateTimeZone($tz);
$offset = $current_tz->getOffset($dt);
$transition = $current_tz->getTransitions($dt->getTimestamp(), $dt->getTimestamp());
$abbr = $transition[0]['abbr'];
$list[$tz] = $tz . ' [' . $abbr . ' ' . $this->formatOffset($offset) . ']';
}
return $this->select($name, $list, $selected, $options);
}