Change date format on UM2.0

Hello,

how can I change the date format, which appears in the user profile when activating the > user meta > Registration Date and Last Login?

I tried some modifications but I did not succeed … I did some research and found the following code:

add_filter('um_profile_field_filter_hook__date','my_custom_sanitize_fields', 9999, 2 );
function my_custom_sanitize_fields(  $value, $data ){
  global $ultimatemember;
 if( $data['metakey'] == 'date-pickah' ){
    $value = $ultimatemember->datetime->format( $value, "d M Y");
  }
  return $value;  
}

But it did not work either…can someone help me with this?