Why can I not generate a valid Time_t?

[philwinder]

Hi,
Using something like:

qDebug() << QString::number( QDateTime(QDate(11,3,9),QTime(13,59,30).toTime_t() );

qDebug() << QString::number( QDateTime(QDate(11,3,9),QTime(13,59,30).toTime_t() );

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looks nothing like a QDateTime::currentDateTime().toTime_t(), and when trying to convert it back to a QDateTime, does not retrieve the correct information. What am I doing wrong?