QFileInfo::lastModified seems to be one hour off

[hardgeus]

I have a QT program that has been functioning properly in Windows for a few months, but recently (after the DST shift maybe?) started acting strangely. I have the following function:

QDateTime frmMain::GetLocalStamp( QString sFilename, bool *pbSuccess ) {
        QDateTime obStamp;
 
        QFileInfo obFileInfo(sFilename);
        if (!obFileInfo.exists() ) {
                qDebug() << "File " << sFilename << " does not exist, no local stamp";
                *pbSuccess = false;
                return( obStamp );
        }
 
        //qDebug() << "Checking local stamp on " << sFilename;
 
        obStamp = obFileInfo.lastModified();
 
        *pbSuccess = true;
        return( obStamp );
} //GetLocalStamp

QDateTime frmMain::GetLocalStamp( QString sFilename, bool *pbSuccess ) {
        QDateTime obStamp;

        QFileInfo obFileInfo(sFilename);
        if (!obFileInfo.exists() ) {
                qDebug() << "File " << sFilename << " does not exist, no local stamp";
                *pbSuccess = false;
                return( obStamp );
        }

        //qDebug() << "Checking local stamp on " << sFilename;

        obStamp = obFileInfo.lastModified();

        *pbSuccess = true;
        return( obStamp );
} //GetLocalStamp

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If I qDebug() the returned QDateTime object, it is one hour off from the time the Operating system reports. Is this a known issue, or is there some step I am missing?