Step 2 - Add Holiday
If, for example, you wanted to block off all tours on Christmas Day, click on the button "Add a Holiday."
Choose the 25th of December as the date.
And the automatic choice is to have an "All Day" exclusion, which would prohibit any tours to be booked for that day.
If, however, you wanted to accept some tours during certain times on that day you would click the "x" button next to the "All Day" exclusions button, and now you can customize the tour hours of that day by clicking on the start and end times.
You can also specify any exclusions during that day by clicking on the "+" button under Exclusions, and choose any number of hour-long periods during the scheduled day to block off from tours.