Protected Days prevent recurring timed events from playing, while allowing timed events specific to that protected day to play according to their schedule. Said another way, they are a way to create exceptions to recurring timed events. You may select a holiday to protect or use the tools provided in the "Protected Days" section to create a specific day to protect.
Select the holiday from the "Holidays" list and click the [Protect Holiday] button . The holiday will display in the "Protected Days" list.
Add any day, not only a holiday, to the "Protected Days" list. Protection could be applied for a specific day, for a specific year, or it could be set to effect all recurrences of a specified day.
Note: You must specify a name for the new protected day before the [Add protected day] button is selectable.