Not certain i've understood correctly but if you have someone who has booked a stay on Airbnb with you, then it is normal that you cannot unblock that day as it is reserved. If you cancel this booking then you will be fined by Airbnb and the amount varies according to how many days before the stay you cancel and Airbnb will block those day(s) on your calendar anyway.
Look up the host cancellation fees for more information.
Not certain i've understood correctly but if you have someone who has booked a stay on Airbnb with you, then it is normal that you cannot unblock that day as it is reserved. If you cancel this booking then you will be fined by Airbnb and the amount varies according to how many days before the stay you cancel and Airbnb will block those day(s) on your calendar anyway.
Look up the host cancellation fees for more information.