In Cloud I can define a Calendar with Exceptions for public Holidays. 
This can be used to define that a Customer does not get service on a public Holiday.

But when I am using Shift Patterns to define resource working time, is there a way to define public holidays?
Even when there is a Calendar defined for the resource as well as the Shift Pattern, the calendar and Calendar exceptions do not appear to have any impact on the Resource Availability generated from the Shift Patterns for the Resource.

Note: this is using Shift Patters not HCM based shifts