The Wittener Tage für neue Kammermusik (Witten Days for New Chamber Music) is a music festival for contemporary chamber music, jointly organised by the town Witten in the Ruhr Area and the broadcasting station Westdeutscher Rundfunk (WDR). The concerts take place over a weekend at the end of April or in early May, and concentrate on world premieres of small-scale works, more than 600 as of 2010. They are broadcast worldwide via the European Broadcasting Union.