JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//cdnjs.cloudflare.com/ajax/libs/moment.js/2.10.6/moment.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/fullcalendar/2.4.0/fullcalendar.min.js"></script>
<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/fullcalendar/2.4.0/fullcalendar.min.css">
<div id='calendar'></div>

JavaScript

$('#calendar').fullCalendar({
    events: [{
    	title: 'My Event',
        titleHTML: 'My <small>Event</small>',
        start: '2015-10-23',
        end: '2015-10-23'
    }],
    eventRender: function(event, element) {
        element.find('.fc-title').html(event.titleHTML);   
    }
});