I really do need an answer to this.
You said, "...all days for which is not set any price..."
From what I can see, the only place to set days and prices is if I go to Objects, click my service, and then Prices. I see a Date Range, but that only gives the dates between one start and end point.
Let's say my studio is going to be running for the next 20 years, I'd want the date range to be from now till 12/31/2032. But I'm only open Mon-Saturday. I can see that I can just not check the Sunday box. However, if I'm going on vacation from August 1-August 20, how do I close that range? Or if I'm simply at the doctor on July 21 from 9am-1pm but open after that? Other than that start/end range, I don't see another place to tell the system of days to not set a price.
Also, what if I have 20 different services? Do I need to go and do the same thing 20 times?
Please keep in mind that I am not using this to book properties but to book my photography service, but through testing, it seems like it'll work great, if I can get this sorted out.