let layout = DatePickerRange.datePickerRange
                    "my-date-picker-range"
                    [
                        DatePickerRange.Attr.monthFormat "MMMM Y"
                        DatePickerRange.Attr.endDatePlaceholderText "MMMM Y"
                        DatePickerRange.Attr.startDate "2017-6-21" 
                    ]