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Sigma KEE - ChristmasDay
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ChristmasDay
An instance of ChristmasDay is a ChristianHoliday on which observant members of Christianity celebrate the birth of Jesus of Nazareth. In both the Gregorian and Julian calendars, ChristmasDay falls on December 25th, but since the two calendars are currently off by 13 days, the ChristmasDays assigned by each correspond to different actual (sidereal, UTC) days.
Relationships      
Parents (DayFn 25 December)
  ChristianHoliday An instance of ChristianHoliday is a Holiday instituted and observed by members of Christianity.
  The Class of all calendar Days.
  固定假期 FixedHoliday is the class of Holidays whose observance is fixed to recurrences of the calendar day that the holiday commemorates. See commemoratesDate.


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