There will be blocks of time when you won't want to book appointments with your clients. This could be to remind yourself that you're doing something else, or if you've enabled client booking, it'll prevent them from booking appointments with you during that time.

Blocking off ad hoc time during your operating hours:

1. Create a new appointment by clicking on the blue plus icon (bottom right) or on the relevant timeslot on the calendar page.
2. Choose the Personal appointment tab and follow the steps to block off the time.

Like a normal appointment, you can reschedule, cancel and clone this appointment.

Block off specific, regular time by adjusting your operating hours:

If you want to block time on a permanent basis, it's a better idea to make a change to your operating hours. More info on updating operating hours.