protected function _setDefaultDateTimeValue($oObject, $sLocalDateFormat, $sLocalTimeFormat, $blOnlyDate)
    {
        $aDFormats = $this->_defineDateFormattingRules();
        $aTFormats = $this->_defineTimeFormattingRules();

        $sReturn = $aDFormats[$sLocalDateFormat][2];
        if (!$blOnlyDate) {
            $sReturn .= " " . $aTFormats[$sLocalTimeFormat][2];
        }

        if ($oObject instanceof \OxidEsales\Eshop\Core\Field) {
            $oObject->setValue(trim($sReturn));
        } else {
            $oObject->value = trim($sReturn);
        }
        // increasing(decreasing) field lenght
        $oObject->fldmax_length = strlen($oObject->value);
    }