We currently use DayType to store the national holidays.

Table: DayTypeAssignment

Sub Element Usage Card Type Description Note
  @id mandatory 1..1 xsd:string Attribute id  
  @version mandatory 1..1 xsd:string Attribute version  
  Date mandatory 0..1 xsd:date Date of the review  
  DayTypeRef mandatory 1..* DayTypeRefStructure The DAY TYPE of all the services in this group.