OptionaldaysAn iCalendar structure that contains a group of special days. Is of type string (containing an iCalendar structure).
OptionaldescriptionUser readable description for the special days. It shall be up to 1024 characters.
OptionalextensionUser readable name. It shall be up to 64 characters.
A service-unique identifier of the item.
The special day group structure shall include all properties of the SpecialDayGroupInfo structure and also a set of special days. A special day group are days (or parts of days) that require the regular schedule to be overridden with an alternate schedule. For example holidays, half-days, working Sundays, etc.