public static function getSecondsFromOffset($sign, $hours, $minutes)
    {
        $hours   = (int) $hours;
        $minutes = (int) $minutes;

        $offset = $hours * 3600;
        $offset+= $minutes * 60;

        if ($sign == '-') {
            $offset = $offset * -1;
        }

        return $offset;
    }