Celebrated annually on 25 October, this is a public holiday in the Basque country region of Spain.
Bilbao is the principal city in the region.
In the Basque language it is known as 'Euskadi Eguna'.
In 2016, this holiday is replaced by the Day of the First Constitiution of the Basque Country.
The day commemorates a referendum that was held and approved on 25 October 1979, which defined the political structure of the Basque region as an autonomous community.
The creation of the holiday of the Day of the Basque Country was approved by the Basque Parliament on 22 April 2010 and it became a holiday in 2011.
Up to 2011 it was the only autonomous region in Spain without a regional holiday.