filter query for events that are in future

code-block.php

<?php

  add_action( 'pre_get_posts', 'lit_event_date_filter' );
  function lit_event_date_filter($query) {
         
  $date_now = date('Ymd');

  $query->set( 'meta_query', array(
                                  array(          
                                    'key'      => 'event_date',
                                    'compare'  => '>',
                                    'value'    => $date_now,
                                    'type'     => 'DATETIME'
                                       )
                                 )
              );
       
  }

?>