If you want to block time on a one off basis, follow these steps
To get started click on Calendar
Click on the calendar where you'd like to block time
Click Add personal event
Write an Event Title
Amend date and time by clicking on the three dots if required
Select an address if required
Click Create Event
If you want to block time on a recurring basis, follow these steps
To get started click on Calendar
Click on the calendar where you'd like to block time
Click Add personal event
Write an Event Title
Toggle on This event repeats
Then click on the 3 dots next to where it says Every Day if you want to amend the frequency
Update the Start Time and Duration of the personal event
Click Save