c++ - QDate::FromString() issue with QDate.year() always returning -4713 -

i trying add date qdate object. month , day placed qdate object correctly year reads -4713.

here code:

int main(int argv, char *argc[]) {    // show arguments make sure correct    qdebug() << "\n";    for( int = 0; < argv ; i++)    {       qdebug() << << ":  " << argc[i] << "\n";    }     // add yyyy-mm-dd date date    qdate date = qdate::fromstring(argc[1],"yyyy-mm-dd");     // check see if date correct    qdebug() << "year: " << date.year() << "\nmonth:" << date.month() << "\nday" << date.day();    return 0; 

}

here use in terminal:

./birthday "1992-01-01" 

the output looks this:

0 : ./birthdays 1 : 1990-01-01 year: -4713 month: 1 day:   1 

now no matter choose year returns -4713. know why? have been stuck on issue while , not understand going on here.

maybe varies qt version qt version me string wasn't converted @ until made letters m - capital "yyyy-mm-dd" started working (my version 5.1.0)

you may see here. ms mentioned capital.