Discover Why October 3 Is One of Germany’s Most Important Dates — and Why Berlin Is a Unique Place to Experience It For international students living in Germany, October 3 may initially appear simply as a day when universities, offices and many businesses are closed. However, behind the public holiday is one of the most important chapters in modern German history. October 3 is German Unity Day — Tag der Deutschen Einheit — Germany’s national holiday. Image licensed via Envato