MP3 Year / Date

[samhnky]

Is anyone able to provide guidance on how to add the ID3 Year/Date tag?
http://wheelersburgfaithbaptistchurch.com/connect/sermon-audio

I added the following code to the following file: content/mp3browser/html/HtmlNameColumn.php

  protected function getCellText($data, $isAlternate) {
       $html = $this->addItemAnchor($data);
       if ($data->getTitle()) {
           $title = $this->wrapAnchor($data, $data->getTitle());
           $html .= "<span style='font-size: .7em;'>Message Title:</span><strong>" . $title . "</strong>";
       }
       if ($data->getArtist()) {
           $artist = $this->wrapAnchor($data, $data->getArtist());
           $html .= "<br/><span style='font-size: .7em;'>Speaker:</span>" . $artist;
       }
        if ($data->getDate()) {
           $date = $this->wrapAnchor($data, $data->getDate());
           $html .= "<br/><span style='font-size: .7em;'>Date:</span>" . $date;
       }
       return $html;
   }

If I use $date I do not get an error, if I use Year I get an error,..