title: Add custom HTML to a jQuery FullCalendar cell
body: <p>I am using the jQuery FullCalendar (<a href="http://arshaw.com/fullcalendar/docs/" rel="noreferrer">http://arshaw.com/fullcalendar/docs/</a>).</p>
  
  <p>I want to add some custom HTML to each day-cell. </p>
  
  <p>For example in my case I want to have different background colors based on some logic, display a price in the middle...</p>
  
  <p><img src="https://i.stack.imgur.com/C7KvY.png" alt="sample calendar"></p>
  
  <p>Is there a way to customize the rendering of a cell?</p>