German Unity Day (Tag der Deutschen Einheit) is Germany’s national public holiday, observed every year on October 3. It marks the formal reunification of East and West Germany in 1990, when the Unification Treaty took effect and the German Democratic Republic (GDR) acceded to the Federal Republic of Germany. The Berlin Wall opened nearly a year earlier, on November 9, 1989; that was a decisive turning point, but not the date reunification became legally effective.
What happened on October 3, 1990?
At midnight on October 3, the Unification Treaty took effect. The five eastern German states named in the treaty became states of the Federal Republic, and the Basic Law—the country’s constitution—applied in those states and throughout Berlin. The date marks the legal and political completion of reunification, rather than the first moment people could cross the Berlin Wall.
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Germany’s federal chronology records that the federal flag was raised in front of the Reichstag during the public celebrations in Berlin. Federal President Richard von Weizsäcker said: “In freier Selbstbestimmung wollen wir die Einheit und Freiheit Deutschlands vollenden.” In English: “In free self-determination, we want to complete Germany’s unity and freedom.” The English wording here is a translation of the German statement.
The Federal Government’s account of October 3, 1990 describes the midnight change and the celebrations.
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Why is German Unity Day on October 3, not November 9?
October 3 was chosen because it was the effective date of the Unification Treaty. The treaty, signed on August 31, 1990, expressly designated October 3 as the legal holiday. The GDR People’s Chamber had voted on August 23 to accede to the Federal Republic under Article 23 of the Basic Law; the treaty set out the terms and arrangements for that accession.
November 9, 1989, is remembered because the Berlin Wall opened after months of protests in the GDR. It was a defining step toward unity, but formal reunification followed after negotiations and the treaty. The dates therefore mark different events:
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| Date | What it marks | Significance |
|---|---|---|
| November 9, 1989 | The Berlin Wall opened. | A turning point in the peaceful revolution and a step toward reunification; it did not itself bring the legal reunification into effect. |
| October 3, 1990 | The Unification Treaty took effect. | The GDR acceded to the Federal Republic and formal reunification became effective; this is the national holiday. |
The Federal Government’s treaty chronology explains the treaty’s signing, accession provisions and choice of holiday date. For the distinction between the Wall’s opening and formal unity, see deutschland.de’s overview of October 3.
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How did October 3 replace June 17?
Before reunification, West Germany observed June 17 as its “Day of German Unity.” That date commemorated the 1953 uprising in East Germany and its suppression. After the Unification Treaty set October 3 as the holiday marking actual reunification, the earlier West German observance was replaced.
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How is German Unity Day observed?
October 3 is a nationwide public holiday. Germany’s official main celebration is hosted by a different state each year, so the host city and public program change. In 2026, Bremen is the host, with festivities scheduled in the city centre from October 2 to 4.
There are also local events beyond the main celebration. Berlin’s official listings for October 3, 2026, include Open Mosque Day and free admission to the German Historical Museum. These are specific listings for 2026, not events guaranteed every year. Check the relevant city or state’s current program when planning a visit.
See the 2026 host information and Berlin’s Day of German Unity events guide for those year-specific details.
At a glance: the road to reunification
- November 9, 1989: The Berlin Wall opened after months of protests in the GDR.
- August 23, 1990: The GDR People’s Chamber voted to accede to the Federal Republic under Article 23 of the Basic Law.
- August 31, 1990: Federal Interior Minister Wolfgang Schäuble and GDR State Secretary Günther Krause signed the Unification Treaty in Berlin.
- October 3, 1990: The treaty took effect, the Basic Law applied in the eastern states and all of Berlin, and formal reunification began.
The Federal Government describes the treaty as a 900-page agreement covering the details of reunification and transitional arrangements. The chronology also refers to “hundreds of thousands” celebrating in Berlin; it does not provide a more precise attendance figure.
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