Property of the script line: International.
This property contains the same type of information and is edited in the same manner as any the aeiou-holidays.
Generally, you should add holidays sets to the Included Holidays property:
•If you refer to holidays sets, or holidays rules, by their ID, such as is the case when using one of the following macro functions: HolidayOfSetInPeriod, HolidayOfSetOnDate, IsHolidayForSet, and IsHolidayOccurence.
•If you use number of working days in a given month tokens, and the holidays sets of that token are used nowhere else in the script.