hbp/application/admin/command/Crud/stubs/mixins/datetime.stub

    public function {%methodName%}($value, $data)
    {
        $value = $value ? $value : (isset($data['{%field%}']) ? $data['{%field%}'] : '');
        return is_numeric($value) ? date("Y-m-d H:i:s", $value) : $value;
    }