I would like to make an extended calendar describing "holidays+1", that is, one day past each holiday, regardless of the kind of day it is.
For example, January 1st is a holiday so January 2nd would be in the calendar, November 26 and 27 are holidays so November 28 would be in the calendar.
Here is an example of an extended calendar definition which I believe would give you the results you are looking for:
Enter Name: plus1
Enter Workdays [XXXXX..]:
Enter Non-workday Actions [' ',O,S,N,W,P]:
Enter Holiday Actions [' ',O,S,N,W,P]: O
Enter Holiday Calendar [none]: myholidaycalendar
Enter Cycle Name [none]:
Enter Date Adjustment : 1
Enter Date Conditions [DAILY]: HOLIDAYS
The above example uses myholidaycalendar as the standard calendar that includes the actual holiday dates, like 7/4/2018 or 12/25/2018 etc..