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Christmas | Origin, Definition, Traditions, History, & Facts
Christmas - Wikipedia
クリスマス - Wikipedia
History of Christmas - Origins, Traditions & Facts | HISTORY
Christmas: Holiday Traditions and Gifts | HISTORY
How Christmas is celebrated around the world - National ...
Christmas - Simple English Wikipedia, the free encyclopedia
How Christmas has evolved over centuries - National Geographic
Christmas Through the Ages - World History Encyclopedia
Christmas summary | Britannica