title: React Fullcalendar - column header format
body: <p>I'm trying to modify the column headers of a FullCalendar calendar on React, so I looked at the doc and I came across this:
  <a href="https://fullcalendar.io/docs/v4/columnHeaderFormat" rel="nofollow noreferrer">https://fullcalendar.io/docs/v4/columnHeaderFormat</a></p>
  <p>Only after a few unsuccessful attempts, I have the impression that this parameter is not implemented in the react version of fullCalendar (v5.3.0)... Would you have a solution to act on the columns format ? Or am I doing things wrong?</p>
  <p>Here part of my code</p>
  <pre><code>&lt;FullCalendar
     plugins={[timeGridPlugin, interactionPlugin]}
     initialView=&quot;timeGridWeek&quot;
     headerToolbar={{
        left:'',
        center:'',
        right:''
     }}
     locale=&quot;fr&quot;
     slotMinTime=&quot;07:00:00&quot;
     slotMaxTime=&quot;20:00:00&quot;
     height={640}
     selectable={true}
     columnHeaderFormat={{ weekday: 'long' }} // Problem here
     selectMirror={true}
     dayMaxEvents={true}
     select={handleDateClick}
     dateClick={handleDateClick}
  /&gt;
  </code></pre>