Mazurka Festival
From Memory Alpha, the free Star Trek reference.
The Mazurka Festival was a celebration of folk dance and music originating in Poland, a region on the European continent on Earth.
This festival is annually celebrated at New Berlin.
In 2354, Benjamin and Jennifer Sisko, together with their friends Cal and Gretchen Hudson, attended the Mazurka Festival at New Berlin, where Benjamin would make a lasting impression for having danced in German lederhosen. (DS9: "The Maquis, Part I")
