I saw this film in Dutch at Kinepolis in Leuven when it first came out in 2010 and absolutely LOVED it. Admittedly, I like scary movies - if you don't, it's probably not for you - and I was desperate to see this film as soon as I saw the trailer. It's set in Amsterdam and is based on the idea that "Sinterklaas" (Dutch Santa Claus, more St Nicholas than Father Christmas) was not actually a nice guy who loved children but a nasty one who stole them as well as terrorising innocent villagers. His victims eventually turned on him and burnt him and his henchmen to death; now, every time there is a full moon on 5th December, the Eve of St. Nicholas' Day, he comes back to kill as many people as possible. The action is set on 5th December, as a cop whose entire family were killed by the "Saint" (Huub Stapel) last time he appeared tries to stop him, aided by Frank (Egbert-Jan Weeber), a student who has been mistakenly arrested on suspicion of some of the murders. There are some superbly gruesome murders (including one by sharpened crozier!) plus an outrageous scene in which the "Saint" mounted on his white horse gallops along the rooftops of Amsterdam whilst the police follow in a car, trying to shoot him out of the window! It's bloody in places but there's a fabulous black humour running through the whole thing.
The film is in Dutch with English subtitles, which personally I like, as the cast have distinctive voices which it would be a shame to dub over, plus the story is set in Holland of course.