Azerbaijan has two key “independence” dates, depending on what you mean by independence:

  • From the Russian Empire: 28 May 1918 – declaration of the Azerbaijan Democratic Republic in Tiflis (today Tbilisi).
  • From the Soviet Union: 30 August 1991 (political declaration restoring state independence), followed by the Constitutional Act on 18 October 1991, which is often treated as the formal legal date of modern state independence.

So, if someone asks “when did Azerbaijan gain independence?” in a modern context (post‑USSR), the most common answer is 18 October 1991, but historically 28 May 1918 is also celebrated as Independence Day and marks the first Azerbaijani republic.

Two independence moments

  • 28 May 1918: Creation of the Azerbaijan Democratic Republic after the collapse of the Russian Empire, often described as the first democratic, secular republic in the Muslim world.
  • 18 October 1991: Adoption of the Constitutional Act “On the State Independence of the Republic of Azerbaijan,” confirming the modern Republic of Azerbaijan as the legal successor of the 1918 republic.

A useful way to think of it is: 1918 is the first independence, 1991 is the restoration of independence.

Which date is officially celebrated?

  • Since 2021, 28 May is officially called “Independence Day” in Azerbaijan, commemorating the founding of the 1918 republic.
  • 18 October is now marked as “Day of Restoration of Independence,” highlighting the break from the Soviet Union.

This change was made to emphasize historical continuity between the modern state and the 1918 republic.

Why the confusion?

People sometimes give different answers because they focus on different breaks in rule:

  • If the focus is on the end of Soviet control: they say 1991 (18 October, sometimes 30 August).
  • If the focus is on the birth of Azerbaijani statehood in the 20th century: they say 1918 (28 May).

In international news or school textbooks about the end of the USSR, you’re more likely to see 1991, whereas Azerbaijani state traditions strongly highlight 1918.

Quick timeline

  1. 28 May 1918 – Azerbaijan Democratic Republic declares independence from the Russian Empire.
  1. April 1920 – Soviet invasion; Azerbaijan becomes the Azerbaijan SSR within the USSR.
  1. 30 August 1991 – Declaration on the restoration of state independence.
  1. 18 October 1991 – Constitutional Act on State Independence adopted.

TL;DR:

  • First independence: 28 May 1918.
  • Modern state’s legal independence from USSR: 18 October 1991 (with a key declaration on 30 August 1991).

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