JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//code.jquery.com/ui/1.11.4/jquery-ui.js"></script>
<link rel="stylesheet" href="//code.jquery.com/ui/1.11.4/themes/smoothness/jquery-ui.css">
<input name="leaveStartDate" id="leaveStartDate" class="form-control" data-plugin-datepicker="" />

JavaScript

var publicHolidayDates = ["2016/04/19"];
var dateToday = new Date();
$("#leaveStartDate").datepicker({
			minDate: '-1d',
      beforeShowDay : disablePublicHolidaysAndWeekends,
			onSelect : function(dateText, inst) {
				var selDate = $(this).datepicker('getDate');
				var lastDate = $("#leaveEndDate").datepicker('getDate');
				if (lastDate != null) {
					if (selDate > lastDate) {
						$("#leaveStartDate").val('');
						$("#startDateError").html(
								"Start Date must be less than End Date");
						$(inst).datepicker('show');
					} else {
						$("#startDateError").html("");
						//calculateDays(selDate, lastDate);
					}
				}
			}
		});

function disablePublicHolidaysAndWeekends(date) {
	var month = date.getMonth();
	var day = date.getDate();
	var year = date.getFullYear();
	if(day < 10 && day > 0){
		day = '0'+day;
	}
  if(month < 9 && month > 0){
     month = '0' +(month + 1);
  }
  else{
    month += 1;
  }
	var getdate = year+ '/' + month + '/' + day;
	for (var i = 0; i < publicHolidayDates.length; i++) {
		if ($.inArray( getdate ,publicHolidayDates) !== -1) {
			return [ false ];
		}
	}

	var noWeekend = $.datepicker.noWeekends(date);
	
	return !noWeekend[0] ? noWeekend : [ true ];
}