(subclass ChristmasDay ChristianHoliday) | Media.kif 334-334 | ChristmasDay 是 ChristianHoliday 的 subclass |
(subclass ChristmasDay Day) | Media.kif 335-335 | ChristmasDay 是 日 的 subclass |
(subclass ChristmasDay FixedHoliday) | Media.kif 336-336 | ChristmasDay 是 固定假期 的 subclass |
(subclass ChristmasDay (DayFn 25 December)) |
Media.kif 337-337 | ChristmasDay 是 25 day 的 subclass |