Data passed by DataBin Grid functionality. $dateTimeFormat = \Utility\Definitions\Locale::getDateTimeFormat(); foreach ($this->_data as $rowId => $rowData) { $this->_data[$rowId]['auction_created'] = $rowData['auction_created']->format($dateTimeFormat); $this->_data[$rowId]['auction_updated'] = !is_null($rowData['auction_updated']) ? $rowData['auction_updated']->format($dateTimeFormat) : ''; } } }