JavaScript Date => QDateTime problems for dates prior to 1981

njeisecke

The following code will display a wrong date for d1.

The output of the following example is like this:

Fri Apr 04 1980 00:00:00 GMT+0200 (CEST) => 03.04.80
Sat Apr 04 1981 00:00:00 GMT+0200 (CEST) => 04.04.81

So in 1980 it's one day off.

I guess there seems to be a problem with dst handling for dates prior to 1981.

I suspect the problem has something to do with conversion from JS Date to QDateTime because basically the same thing works when used from the C++ side (see second code snippet):

"Fr. Apr 4 00:00:00 1980"
"Sa. Apr 4 00:00:00 1981"

Could that considered to be a bug?

Thanks!

Qml example
@
import QtQuick 1.0

Rectangle {
width: 400; height: 360

property date d1: new Date(1980, 3, 4, 0, 0, 0)
property date d2: new Date(1981, 3, 4, 0, 0, 0)

Text {
anchors.centerIn: parent
text: "<p>" + d1.toString() + " => " + Qt.formatDate(d1) + "<br>" + d2.toString() + " => " + Qt.formatDate(d2) + "<p>"
}
}
@

C++ example
@
#include <QtCore/QCoreApplication>
#include <QDebug>
#include <QDateTime>

int main(int argc, char *argv[])
{
QDateTime d1(QDate(1980, 4, 4), QTime(0, 0, 0));
QDateTime d2(QDate(1981, 4, 4), QTime(0, 0, 0));

qDebug() << d1.toString();
qDebug() << d2.toString();
}
@

mbrasser

Hi,

This certainly looks like a bug to me at first glance -- I'd suggest adding a bug via http://bugreports.qt.nokia.com .

Regards,
Michael

njeisecke

Done.

For the record: https://bugreports.qt.nokia.com/browse/QTBUG-22582

Nils