Norway's parliament dissolves its union with Sweden. The vote was confirmed by a national plebiscite on August 13 of that year.

The dissolution of the union between the kingdoms of Norway and Sweden under the House of Bernadotte, was set in motion by a resolution of the Storting on 7 June 1905. Following some months of tension and fear of an outbreak of war between the neighbouring kingdoms – and a Norwegian plebiscite held on 13 August which overwhelmingly backed dissolution – negotiations between the two governments led to Sweden's recognition of Norway as an independent constitutional monarchy on 26 October 1905. On that date, King Oscar II renounced his claim to the Norwegian throne, effectively dissolving the United Kingdoms of Sweden and Norway, and this event was swiftly followed, on 18 November, by the accession to the Norwegian throne of Prince Carl of Denmark, taking the name of Haakon VII.

Sweden and Norway or Sweden–Norway, officially the United Kingdoms of Sweden and Norway, and known as the United Kingdoms, was a personal union of the separate kingdoms of Sweden and Norway under a common monarch and common foreign policy that lasted from 1814 until its peaceful dissolution in 1905.

A referendum on dissolving the union with Sweden was held in Norway on 13 August 1905. Dissolving the union, which had been in place since 1814, was approved by almost 100% of voters, with just 184 voting against the proposal out of over 371,000 votes cast.

August 13 is the 225th day of the year in the Gregorian calendar; 140 days remain until the end of the year.