"Indeed it's the holiday "Sinterklaas" Held at the 5th of december but celebrated weeks in advance. Including a traditional entry, where "Sinterklaas" here played by "Bram van der Vlugt" docks his ship filled with presents and helpers (the guys in black make-up) in a different Dutch city each year. They are black because much like Santa they have to deliver the presents trough the chimney.
The actors in this picture are all well know actors from dutch television, (google Bram van der Vlugt) apart from the camera crew who are dressed the same way to mask the fact it's all fake. Little children in Holland believe in "Sinterklaas" like others believe in Santa. "