Datepicker

Custom widget: JQuery UI Datepicker Third-party libraries: datepicker License 

                        

    
        Survey.StylesManager.applyTheme("modern");
    


var json = {
  "elements": [
    {
      "name": "date",
      "type": "datepicker",
      "inputType": "date",
      "title": "Your favorite date:",
      "dateFormat": "mm/dd/yy",
      "isRequired": true
    }
  ]
};

window.survey = new Survey.Model(json);


    survey.onComplete.add(function(result) {
        document.querySelector('#surveyResult').textContent =
            "Result JSON:\n" + JSON.stringify(result.data, null, 3);
    });


$("#surveyElement").Survey({ 
    model: survey 
});


                    
<!DOCTYPE html>
<html>
<head>
    <title>Custom widget: JQuery UI Datepicker, jQuery Survey Library Example</title>


    <meta name="viewport" content="width=device-width, initial-scale=1">
    <script src="https://unpkg.com/jquery"></script>
<script src="https://surveyjs.azureedge.net/1.1.24/survey.jquery.js"></script>
<link href="https://surveyjs.azureedge.net/1.1.24/modern.css" type="text/css" rel="stylesheet" />
    <link rel="stylesheet" href="./index.css">
<script src="https://code.jquery.com/ui/1.11.4/jquery-ui.min.js"></script>
<link href="https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.18/themes/smoothness/jquery-ui.css" type="text/css" rel="stylesheet" /> 
    <script src="https://surveyjs.azureedge.net/1.1.24/surveyjs-widgets.js"></script>

</head>
<body>
                <div id="surveyElement">
            </div>
    <div id="surveyResult"></div>

<script type="text/javascript" src="./index.js"></script>

</body>
</html>

Date format: (default is 'mm/dd/yy') 

var q = survey.getQuestionByName('date');
q.dateFormat = yourvalue; 
survey.render();