• John Huebner

• January 2, 2017 at 4:21 am

You need to create an acf/save_post filter https://www.advancedcustomfields.com/resources/acf-save_post/ something like this.

add_filter('acf/save_post', 'my_copy_date_filter', 20);
    // priority is 20 so that it runs after acf has saved the value
function my_copy_date_filter($post_id) {
  $post_type = get_post_type($post_id);
  if ($post_type != 'eveniment') {
    // not our post type, bail early
    return;
  }
  $date = get_field('data_incepe', $post_id);
  update_post_meta($post_id, 'calendar_data', $date);
}