(=>
(and
(commemoratesDate ?HOLIDAY
(DayFn ?DAY
(MonthFn ?MONTH
(YearFn ?YEAR))))
(instance ?DATE ?HOLIDAY)
(subclass ?HOLIDAY FixedHoliday)
(lessThanOrEqualTo ?YEAR ?LATER_YEAR))
(instance ?DATE
(DayFn ?DAY
(MonthFn ?MONTH
(YearFn ?LATER_YEAR))))) |
Government.kif 583-589 |
If the day X of month the month Y is a commemorates date of Z, W is an instance of Z, Z is a subclass of fixed holiday, and V is less than or equal to ?LATER_YEAR, then W is an instance of the day X of month the month Y |