Would you like to book a service only on a certain day or a certain part of the day? It is possible by changing some settings in your account.
Only make a service bookable on certain days
If you want to make a service bookable only a specific day and times, follow these steps.
Go to settings > calendar > services.
Select the service you want to make bookable on specific days.
In this window, click on "service is available on specific days and times":
In the following window you will see the days you and times you can select for the service to be available and bookable on those specific days;
Result: You have now created a service which is available on the specific days and times that you desired.