Corrected entry: The Dutch Christmas song that is sung with the war orphan from Holland is in fact not a Christmas song but a Sinterklaas song. Sinterklaas is an entirely different holiday, celebrated on the 5th of December and has nothing to do with Christmas.
Correction: "Sinterklass" day, celebrated on Dec. 6 (not 5), is the Feast of St. Nicholas according to the Christian calendar. St. Nick is of course Santa Claus, and many countries celebrate that feast with gifts and parties.