Simple Front End Post date fix

if ( empty( $post_id ) ) {

    // this is a new post

    $post_data = array(
    'post_author'  => $this->post_author,
    'post_content' => $content,
    'post_type'    => $this->post_type,
    'post_status'  => $this->post_status,
    'post_title'   => $title
    );

    $post_id = wp_insert_post($post_data);

} else {

    // edit post

    $post_data = array(
    'ID'        => $post_id,
    'post_author'   => $this->post_author,
    'post_content'  => $content,
    'post_type'     => $this->post_type,
    'post_status'   => $this->post_status,
    'post_title'    => $title
    );

    $post_id = wp_update_post($post_data);

}