<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Bootstrap DatePicker</title>
<script src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
<script src="https://unpkg.com/gijgo@1.9.11/js/gijgo.min.js" type="text/javascript"></script>
<link href="https://unpkg.com/gijgo@1.9.11/css/gijgo.min.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div class="container">
<h2>Date picker</h2>
<div class="row">
<div class="col-md-12">
<input id="datepicker" width="270" />
</div>
</div>
</div>
<script>
$('#datepicker').datepicker({
uiLibrary: 'bootstrap'
});
</script>
</body>
</html>
