I think you need the ability to select time intervals when the object is unavailable - for whatever reason - like a black booking

Sorry, I don't understand exactly. What do you mean - black booking?

Hi F
or example - if I rent out a room by the day .

But some days it is not available - becuase it is being cleaned

How can I make those dates on the calendar as unavailable to book

Hello, I understand. There is not special functionality for this issue. I have only one idea: make fake reservation to disable them.

I understand this can be done by "making fake" bookings but I have alot of bookable itums and it would take me hours to black out a week on all of them.

Must be a better way.

Other than this I like your component.

Hello,

This functionality should be implemented from version 2.0.1.
Go to Control Panel -> tab Bookable Items -> icon Closing Days