JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://cdn.kendostatic.com/2013.3.1119/styles/kendo.common.min.css">
<link rel="stylesheet" href="http://cdn.kendostatic.com/2013.3.1119/styles/kendo.rtl.min.css">
<link rel="stylesheet" href="http://cdn.kendostatic.com/2013.3.1119/styles/kendo.silver.min.css">
<script src="http://cdn.kendostatic.com/2013.3.1119/js/kendo.all.min.js"></script>
<input id="datepicker"  />

JavaScript

$(document).ready(function() {
     // JavaScript counts months from 0 to 11. January is 0. December is 11.
     
     var date = new Date();
var firstDay = new Date(date.getFullYear(), date.getMonth(), 1);
var lastDay = new Date(date.getFullYear(), date.getMonth() + 1, 0);
     
     $("#datepicker").kendoDatePicker({
      min: firstDay,
      max: lastDay
     });
});