December(December)

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(dateEstablished WorldCustomsOrganization
    (DayFn 15
        (MonthFn December
            (YearFn 1950))))		 Government.kif 3055-3055 The day 15 is a date established of world customs organization
(equal WinterSeason
    (RecurrentTimeIntervalFn December February))		 Geography.kif 1667-1667 Winter season is equal to the recurring period from December to February
(subclass ChristmasDay
    (DayFn 25 December))		 Media.kif 337-337 Christmas day is a subclass of the day 25


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