JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://cdn.kendostatic.com/2012.2.913/js/kendo.all.min.js"></script>
<link rel="stylesheet" href="http://cdn.kendostatic.com/2012.2.913/styles/kendo.mobile.all.min.css">
<link rel="stylesheet" href="http://cdn.kendostatic.com/2012.2.913/styles/kendo.common.min.css">
<link rel="stylesheet" href="http://cdn.kendostatic.com/2012.2.913/styles/kendo.default.min.css">
<div id="calendar" data-role="calendar" data-bind="value: val"></div>

JavaScript

$.ajax({
    url: "/echo/json/",
    dataType: "json",
    type: "POST",
    data: { //using jsFiddle's echo service to simulate Json request
        json: JSON.stringify({
            value: "01/01/2013",
            dates: [
                "01/02/2013", "01/03/2013"  
            ]
        })
    },
    success: function(response) {
        var value = kendo.parseDate(response.value),
            dates = response.dates;
        viewModel.set("val", value);
        
        for(var i = 0; i < dates.length; i++) {
            //push dates in viewModel's dates array
            viewModel.dates.push(kendo.parseDate(dates[i]));   
        }
        $("#calendar").data("kendoCalendar")
            .setOptions({dates: viewModel.get("dates")}); //set the dates
        $("#calendar").data("kendoCalendar")
            .navigate(); //refresh
    }
});

var viewModel = kendo.observable({
    val: null,
    dates: []   
});

kendo.bind($("body"), viewModel);