The visit of the Wise Men is on January 6th in the Netherlands, Sinterklaas brings presents in the night of December 5th when the children are asleep, so the real Sinterklaas-day is on December 6th. There is the same custom in Germany where Sinterklaas is called Sankt Nikolaus or just der Nikolaus (the Nikolaus).
And the Kerstman (Weihnachtsmann in Germany) brings presents on Christmas.
Originally Sinterklaas and the Kerstman is the same person, Kerstman beeing a re-import from America. Sinterklaas was named SantaClaus in America, and as Father Christmas he returned to the Netherlands and was named Kerstman (= Christ man).