On May 28 each year, Ethiopia celebrates Derg Downfall Day.
This day commemorates the end of the Marxist junta that ruled the country from 1974 to 1991.
It is the national day of Ethiopia.
In 1974, a provisional military administrative council installed a socialist military government.
The council was known popularly as the Derg.
Opposition to the regime sparked a civil war.
The Derg was officially abolished in 1987, following the adoption of the new Soviet-style constitution.
The socialist regime in Ethiopia collapsed on May 28, 1991, when the Ethiopian Peoples' Revolutionary Democratic Front forces entered Addis Ababa.
Ethiopia does not celebrate Independence Day because it has never been a colony, therefore Derg Downfall Day was declared as Ethiopia's national holiday.