ezcontent-8.x-dev/modules/ezcontent_node/ezcontent_node.module

<?php

/**
 * @file
 * Hooks implementations for EzContent Node module.
 */

use Drupal\ezcontent_node\Element\Date;

/**
 * Implements hook_element_info_alter().
 */
function ezcontent_node_element_info_alter(array &$info) {
  $info['date']['#process'][] = [Date::class, 'processDate'];
}