Change Created Date to date from field_post_date I am changing a large amount of news content types 'Created' dates. I figured out to use VBO with execute php and this code...

$entity -&gt; created = strtotime($entity-&gt;field_post_date[LANGUAGE_NONE][0]['value']);
node_save($entity);


This code works!
I had 'create' not 'created' - Doh! 
Now it works...