Is there a best practice to pass JavaScript Date objects to QML List Delegates?

If you have a ListModel like:
    ListModel {
        id: listModel

        Component.onCompleted: {
            var now = new Date();

            var items = [{title: "test1", due: now, description: "subtitle for item1", id: 0}, {title: "test2", due: now, id: 1}];

            for (var i=0, l=items.length; i < l; i++) {

And then want to pass the items to the respected section delegate to "render" their view and define the "due" property as sections:
        Component {
            id: delegate

            Rectangle {
                Text {
                    text: {
                        console.log("section by delegate: " + section);
                        var myDate = Date.parse(section);
                        console.log("myDate type: " + typeof(myDate));
                        console.log("myDate: " + myDate.toDateString());
                        return myDate.toString();
                    anchors.left: parent.left
                    font.bold: true
                MouseArea {
                    anchors.fill: parent
                    onClicked: console.log("clicked: " + section)

"myDate" will return "NaN". The "due" property is typeof string which I guess is the intended way to pass properties to the delegate (?), but neither Date.parse() nor new Date(section) will give you a new date object in the delegate...