I have use the below code for converting `JSON Date` to `Original Date`. Below is my Code..

```
    var convertDate = function (jsonDate) {
            var date = new Date(parseInt(jsonDate.substr(6)));
            return date.format("mm-dd-yyyy");
       };

alert(convertDate(aData["Date"]));

```

Below error is shown in Firebug.

```
 if (isNaN(date)) throw SyntaxError("invalid date");

```

Any Help...