JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://arshaw.com/js/fullcalendar-1.5.3/fullcalendar/fullcalendar.css">
<script src="http://www.arshaw.com/js/fullcalendar-1.5.3/fullcalendar/fullcalendar.min.js"></script>
<script src="http://arshaw.com/js/fullcalendar-1.5.4/fullcalendar/gcal.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/fullcalendar/3.9.0/fullcalendar.js"></script>

<button id="test1">Test1</button>
<br><br>
<div style="border:solid 2px red;">
    <div id='calendar'></div>
</div>

JavaScript

$(document).ready(function() {
    var date = new Date();
    var d = date.getDate();
    var m = date.getMonth();
    var y = date.getFullYear();

    var events_array = [
        {
        title: 'Test1',
        start: new Date(2012, 10, 1),
        allDay: false},
    {
        title: 'Test2',
        start: new Date(2012, 10, 2),
        allDay: true}
    ];

    $('#calendar').fullCalendar({
        header: {
            left: 'prev,next today',
            center: 'title',
            right: 'month,agendaWeek,agendaDay'
        },
        defaultView: 'month',
        events: events_array,
        dayClick: function(date, allDay, jsEvent, view) {
            console.log(view.name);
            if (view.name === "month") {
                $('#calendar').fullCalendar('gotoDate', date);
                $('#calendar').fullCalendar('changeView', 'agendaDay');
            }
        }
    });
});