Get Date On Custom Post From ACF

<a class="event-summary__date t-center" href="<?php the_permalink(); ?>">
  <span class="event-summary__month">
  <?php $eventDate = new DateTime(get_field('event_date'));
    echo $eventDate->format('M')
  ?>
  </span>
  <span class="event-summary__day">
  <?php 
    echo $eventDate->format('d') 
  ?>
  </span>
</a>