[B2Qt] default Timezone is not set

import QtQuick 2.9
import QtQuick.Window 2.2
import QtQuick.Controls 1.4

Window {
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")

    Calendar {
        id: cal1
        selectedDate: new Date()
        Component.onCompleted: {
            /*console.log(cal1.minimumDate);
            console.log(cal1.maximumDate);
            cal1.minimumDate = "1969-12-15";
            cal1.maximumDate = "2020-12-31";
            cal1.selectedDate = "1999-12-01";
            console.log(cal1.minimumDate);
            console.log(cal1.maximumDate);
            console.log(cal1.locale.name);*/
            //cal1.locale = Qt.locale("en_US")
        }
    }
}