Time::compareValues

static function compareValues($valueA, $valueB)
{
	$offset = CTimeZone::GetOffset();
	$timestampA = (new ValueTime((string)$valueA, $offset))->getTimestamp();
	$timestampB = (new ValueTime((string)$valueB, $offset))->getTimestamp();

	return parent::compareValues($timestampA, $timestampB);
}