Marking Leave Days In Calendar Regarding SharePoint Leavelist

<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
<link rel="stylesheet" href="/resources/demos/style.css">
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<script src='https://zsl85.sharepoint.com/sites/LMS/SiteAssets/Holiday/moment.js'></script>
<style type="text/css">
.ui-datepicker td.holiday a,
.ui-datepicker td.holiday a:hover {
background: #C0392B;
border: 1px solid #BF5A0C;
}
</style>
<script type="text/javascript">
var holidays1 = [];
$(document).ready(function() {
var siteUrl = _spPageContextInfo.siteAbsoluteUrl;
var oDataUrl = siteUrl + "/_api/web/lists/getbytitle('HolidayList')/items?$select=Date,Holiday";
$.ajax({
url: oDataUrl,
type: "GET",
dataType: "json",
headers: {
"accept": "application/json;odata=verbose"
},
success: mySuccHandler,
error: myErrHandler
});
function mySuccHandler(data, request) {
if (data.d.results.length >= 1) {
$.each(data.d.results, function(key, val) {
var GetYear = moment(val.Date).format("YYYY");
var GetMonth = moment(val.Date).format("MM");
var GetDay = moment(val.Date).format("DD");
var Holiday = val.Holiday;
holidays1.push([GetYear, GetMonth, GetDay, Holiday]);
});
$("#date").datepicker({
beforeShowDay: setHoliDays
});
function setHoliDays(date) {
var holiDays = holidays1;
for (i = 0; i < holiDays.length; i++) {
if (date.getFullYear() == holiDays[i][0] && date.getMonth() == holiDays[i][1] - 1 && date.getDate() == holiDays[i][2]) {
return [true, 'holiday', holiDays[i][3]];
}
}
return [true, ""];
}
}
}
function myErrHandler(data, errCode, errMessage) {
alert("Error: " + errMessage);
}
});
</script>
<div id="Container">
<p>Holidays <input type="text" id="date" readonly="true"></p>
</div>