JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://code.jquery.com/ui/1.10.3/jquery-ui.js"></script>
<link rel="stylesheet" href="http://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css">
<div id="calendar"></div>
<div class="info"></div>

CSS

.highlight {
    border: 1px solid red !important;        
}

.ui-datepicker{
    font-size: 12px !important;
}

.info {
    margin: 10px 0px;
    padding: 5px;
    width: 200px;
    height: 200px;   
    border: 1px solid black;
}

.info p{
    margin:0px;
    padding: 0px;
    
}

JavaScript

var months = {
    1 : ["2013-01-29", "2013-01-21", "2013-01-22"],
    2 : ["2013-02-10", "2013-02-22", "2013-02-24"], 
    3 : ["2013-03-12", "2013-03-23", "2013-03-27"], 
    4 : ["2013-04-15", "2013-04-22", "2013-04-28"], 
    5 : ["2013-05-17", "2013-05-21", "2013-05-15"], 
    6 : ["2013-06-18", "2013-06-25", "2013-06-12"], 
    7 : ["2013-07-23", "2013-07-24", "2013-07-11"], 
    8 : ["2013-08-01", "2013-08-07", "2013-08-03"], 
    9 : ["2013-09-23", "2013-09-05", "2013-09-09"], 
    10 : ["2013-10-20", "2013-10-11", "2013-10-01"], 
    11 : ["2013-11-28", "2013-11-22", "2013-11-26"], 
    12 : ["2013-12-29", "2013-12-25", "2013-12-22"]    
};

var defaultMonth = 9;
var dates = months[defaultMonth];
setInfo(defaultMonth);

(function($) {
    $("#calendar").datepicker({        
        beforeShowDay: function(date) {
            console.log('beforeShowDay');
            
            var date = jQuery.datepicker.formatDate('yy-mm-dd', date);
            
            if (dates.indexOf(date) != -1) {
                return [ true, 'highlight'];
            }
            
            return [ true ];
        },
        onSelect: function(dateText) {
            console.log('onSelect');
            alert(dateText);
        },        
        onChangeMonthYear: function(year, month, instance) {            
            $.ajax({
                type: "POST",
                dataType: 'json',
                url: "/echo/json/",
                data: {},
                async : false,
                success: function( data ) {
                    console.log('onChangeMonthYear');
                    dates = months[month];
                    setInfo(month);     
                }                
            });                                   
        },        
    });
})(jQuery);


function setInfo(month) {
    dates = months[month];
    $('.info').empty();                
    $('.info').append('<p>Month: ' + month + '</p>' );
    $('.info').append('<p>Selected...