<DemoItem label="DateTimePicker">
  <DateTimePicker defaultValue={todayAtNoon} maxDateTime={todayAt9AM} />
</DemoItem>
<DemoItem label="DateTimeRangePicker" component="DateTimeRangePicker">
  <DateTimeRangePicker
    defaultValue={[todayAt9AM, todayAtNoon]}
    maxDateTime={todayAt9AM}
  />
</DemoItem>