The document discusses several important dates in German history: 1) June 17th, which was formerly a holiday in West Germany commemorating uprisings in 1953, the building of the Berlin Wall in 1961, and its fall in 1989. 2) November 9th, marking the fall of the Berlin Wall in 1989. 3) October 3rd, officially celebrating German reunification in 1990 after the fall of the Berlin Wall and communism in East Germany the prior year. The date was almost changed in 2004.