Availability only shown for calendar month currently in booking window.

On the booking page people only see availability to the end of the calendar month shown in the window. The first days of the following month are also visible, but availability on those days is not highlighted until people click on the right arrow to bring the following month into focus. I have people who do not realise this and therefore think I have no availability, e.g. on May 1, 4, 5, 6, 7 and 8, even though I do. Please can you address this