JSFiddle - React, Tailwind, and code Playground

HTML

<input id="datepicker"/>

JavaScript

$(document).ready(function () {

            var date1 = new Date(2014, 5, 6);
            var date2 = new Date(2014, 5, 17);

            $('#datepicker').datepicker({

               dateFormat: "mm/dd/yy",

               beforeShowDay: function (date) {


                   if (+date === +date1 ) {

                        return [true, 'Highlighted', 'Available Date'];
                    }
                    return [false, '', ''];
                }
            });
        });