globally convert dates E2 -> E3

convert dates to text

$pages = $this->getPagesTable()->fetch(array('namespace'=>'event'));
        foreach($pages as $page) {
            // Get start date
            $startDate = $this->getContentNodesTable()->getContentNode($page->id, 'startDate');
            if($startDate->content != '') {
                $date = date('Y-m-d',$startDate->content);
                $this->getContentNodesTable()->saveContentNode($page->id, 'startDate', $date, $language = 'en');
            }

            $endDate = $this->getContentNodesTable()->getContentNode($page->id, 'endDate');
            if($endDate->content != '') {
                $date = date('Y-m-d',$endDate->content);
                $this->getContentNodesTable()->saveContentNode($page->id, 'endDate', $date, $language = 'en');
            }
        
        }
        die('fin');