QLocale::ShortFormat prints wrong date on some machine

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QDate date(1900,1,1);
    QLocale locale;
    QString szDate = locale.toString( date,locale.dateFormat(QLocale::FormatType::ShortFormat) );
    qDebug()<<szDate<<locale.dateFormat(QLocale::ShortFormat);
    return app.exec();
}

Above code prints  (1899-12-12) 
above code with us locale prints 12/31/99
M/d/yy