Time zone conversions incorrect for UTC-08:00 zone.

#include <QCoreApplication>
#include <QTimeZone>
#include <QDebug>
int main(int argc, char *argv[])
{
    QTimeZone localTimeZone(-28800);                  // Define a variable with this time zone.
    QDateTime theTime(QDate(2014, 02, 01), QTime(9, 10, 20), localTimeZone);               // Define a Date/time variable and give it a time in the winter.
    qDebug() << "theTime is       " << theTime;
    qDebug() << "theTime in UTC is" << theTime.toUTC() << "Should be \"2015-02-01 17:10:20.000 UTC\"";
    return 0;
}