jQuery DatePicker minDate & MaxDate

Exemplo: http://stackoverflow.com/a/10139691 Doc: http://api.jqueryui.com/datepicker/#option-altFormat

HTML

<link rel="stylesheet" href="http://code.jquery.com/ui/1.8.18/themes/base/jquery-ui.css">
<script src="http://code.jquery.com/ui/1.9.2/jquery-ui.js"></script>
  <script src="https://eternicode.github.io/bootstrap-datepicker/bootstrap-datepicker/js/bootstrap-datepicker.js"></script>
    <link rel="stylesheet" href="https://netdna.bootstrapcdn.com/bootstrap/3.0.3/css/bootstrap.min.css">
  <link rel="stylesheet" href="https://eternicode.github.io/bootstrap-datepicker/bootstrap-datepicker/css/datepicker3.css">
<div class="demo">
    <p>Date: <input type="text" id="datepicker" /></p>
</div><!-- End demo -->

CSS

.Highlighted a{
   background-color : Green !important;
   background-image :none !important;
   color: White !important;
   font-weight:bold !important;
   font-size: 12pt;
}

JavaScript

var day='';
$(function() {
    $( "#datepicker" ).datepicker({
       daysOfWeekHighlighted: "1,3,6",
        dateFormat: "mm/dd/yy",
        changeYear: true,
        changeYear: true,
        minDate: 0,
        maxDate: new Date(2019, 02 - 1, 18),
         onSelect: function(dateText, inst) { 
            var date = $(this).datepicker('getDate');
            day=date.getDay();
            alert();
            }
    });
});