Sodaburger

If you want to display just the year change this code:

$str .= '"Birthday='.$node->born.'",'."\n";
 if (!empty($node->died) && $node->died != '-') {
  $str .= '"Deathday='.$node->died.'",'."\n";
 }

to this code:

$str .= '"Birthday='.substr($node->born, 0, 4).'",'."\n";
 if (!empty($node->died) && $node->died != '-') {
  $str .= '"Deathday='.substr($node->died, 0, 4).'",'."\n";
 }