Helper::formatTimezone

static function formatTimezone(DateTimeZone $timezone): string
{
	$utcOffset = "UTC";
	if ($timezone->getTimeZone()->getOffset(new DateTime('now')) !== 0)
	{
		$time = new DateTime('now', $timezone->getTimeZone());
		$utcOffset .= " " . $time->format('P');
	}

	return "($utcOffset) " . $timezone->toString();
}