Hi @weareempire
In the same way that you pass $post_object->ID to the get_permalink function, you need to pass this to the get_the_date function too.
That said, the get_date function doesn’t have a parameter for $post_id, so you will need to use get_the_time instead:
http://codex.wordpress.org/Function_Reference/get_the_time
Thanks
E
