Availability in calendar

The availability in the calendar is rather cumbersome if you want to present an open calendar to your customers. I now have to create a time slot for each separate hour of PT sessions during the day (I can repeat this for each weekday). It might be better to be able to set a duration (e.g., 60 minutes) for the product (in this case, a PT session) and then set the availability in the calendar from 8:00 a.m. to 8:00 p.m. This way, an entire day is scheduled in one go (and, by extension, the entire year).