| (subclass Holiday TimeInterval) | Mid-level-ontology.kif 14848-14848 | Holiday is a subclass of time interval |
| (subclass FixedHoliday Holiday) | Mid-level-ontology.kif 14855-14855 | Fixed holiday is a subclass of holiday |
| (subclass MoveableHoliday Holiday) | Mid-level-ontology.kif 14860-14860 | Moveable holiday is a subclass of holiday |
| (subclass ChristianHoliday Holiday) | Media.kif 264-264 | Christian holiday is a subclass of holiday |
| (subclass JewishHoliday Holiday) | Media.kif 276-276 | Jewish holiday is a subclass of holiday |
| (subclass USHoliday Holiday) | Media.kif 288-288 | US holiday is a subclass of holiday |
| (subclass EidAlFitr Holiday) | ArabicCulture.kif 228-228 | Eid al fitr is a subclass of holiday |
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