All of the holidays for the year have been blocked off already, but we would highly recommend to keep an eye on it. It's easy to "Override" the settings when you have to make a change to certain days/times.

To change the availability time for certain days, click on Event Types and then to "Appointment to Complete your Application / ID & I9".

Go to "When can people book this event?"

Click on the particular day you would like to change the time or block off completely.

From the above screen, you can change the times or completely block off a day.  You can also Apply to that day or Apply to all Certain days or apply to multiple days.

If this pops up, always click on "Don't override".  This will NOT overwrite your future blocked off times/days (like holidays).