Custom week length not working with month mode

I am trying to display a month view but with only mon-fri but it does not work. Now if i set the `mode={'custom'}` it works with the custom week length but then it only shows the week.

Here is my component:
```js
<Calendar 
  events={events} 
  height={600} 
  mode={'month'} 
  weekStartsOn={1}
  weekEndsOn={5}
/>
```

Thank you,
Noah