Restoration of Azerbaijan's state independence (18 October 1991)

On 30 August 1991 Azerbaijan's Supreme Soviet adopted a declaration on restoring the state independence of the Republic of Azerbaijan, and on 18 October 1991 it passed the Constitutional Act on State Independence.

The Act declared Azerbaijan the successor of the Azerbaijan Democratic Republic of 1918-1920. In a referendum on 29 December 1991 the people voted for independence. Türkiye was the first state to recognise Azerbaijan's independence, on 9 November 1991, and Azerbaijan joined the United Nations on 2 March 1992.

Since 2021, 18 October has been marked in Azerbaijan as Independence Restoration Day, while 28 May, the day the Democratic Republic was proclaimed, is Independence Day.