Independence Day in Azerbaijan is observed every October 18, marking the anniversary of the country's declaration of independence from the Soviet Union in 1991. The day commemorates the Supreme Council's adoption of the Declaration of Independence, which was later affirmed by a referendum in December of the same year. Unlike many other countries, this holiday is a national working holiday in Azerbaijan, and as such, special events are not typically organized. The historical context of this celebration includes Azerbaijan's integration into the Soviet Union in 1920 and the civil unrest that arose during the late 1980s, culminating in the violent events known as Black January in 1990. Although Independence Day is significant, it is primarily recognized through the observance of the day rather than through large-scale celebrations or festivities.