January 9 is Republic Day in the Republika Srpska.
During its long history Bosnia and Herzegovina was a part of the Ottoman Empire, the Austro-Hungarian Empire, the Kingdom of Yugoslavia and the Socialist Federative Republic of Yugoslavia.
1991 was the year when Yugoslavia started to break-up.
On January 9, 1992 Serbian Rebulic of Bosnia and Herzegovina was established and later in August 1992 changed its name into the Republika Srpska.
Republic Day is one the most important holidays in the Republika Srpska.