JSFiddle - React, Tailwind, and code Playground
HTML
<div id="calendar"></div>
<input type="text" id="alternate" name="delivery-date"/>
JavaScript
$(document).ready(function(){
$( "#calendar" ).datepicker({ minDate: +4, maxDate: "+1M +4D", dayNamesMin: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'], prevText: '<<', nextText: '>>', changeMonth: false, changeYear: false, altField: "#alternate", altFormat: "DD, d MM, yy", gotoCurrent: false, defaultDate: '+4'});
var today = new Date();
today.setDate(today.getDate()+4);
$("#alternate").val($.datepicker.formatDate('D, dd M yy', today));
});