A referendum on the Treaty establishing a Constitution for Europe was held in Spain on Sunday, 20 February 2005. The question asked was "Do you approve of the Treaty establishing a Constitution for Europe?". The consultative referendum on ratification of the proposed Constitution for the European Union was approved by 81.8% of valid votes, although turnout was just 41.8%, the lowest since the end of the Franco era.
General elections were held in Denmark on 10 January 1984, after the opposition voted against the government's state budget bill. Although the Social Democratic Party remained the largest in the Folketing with 56 of the 179 seats, the Conservative People's Party achieved its best-ever result, gaining 16 seats. The coalition partners Venstre and the Christian People's Party also increased their representation, although the fourth government party, the Centre Democrats, lost seven of their 15 seats. Overall the coalition won three more seats, and Poul Schlüter continued as Prime Minister.
Folketing elections were held in Denmark on 3 April 1939, except in the Faroe Islands where they were held on 19 April. They followed a dissolution of both chambers in order to call a referendum on changing the constitution. The referendum was held on 23 May but failed due to a low voter turnout. The result of the elections was a victory for the Social Democratic Party, which won 64 of the 149 seats. Voter turnout was 79.2% in Denmark proper and 47.8% in the Faroes.
Folketing elections were held in Denmark on 23 March 1943 alongside Landsting elections, except in the Faroe Islands where they were held on 3 May. They were the first and only elections held during the German occupation, and although many people feared how the Germans might react to the election, the event took place peacefully. The voter turnout was at 89.5%, the highest of any Danish parliamentary election, and became a demonstration against the occupation. The Social Democratic Party remained the largest in the Folketing, with 66 of the 149 seats. After the elections, leading German newspapers expressed disappointment and indignation with the lack of political evolution among the Danish voters.
General elections were held in Belgium on 4 June 1950. The result was a victory for the Christian Social Party, which won 108 of the 212 seats in the Chamber of Representatives and 54 of the 106 seats in the Senate. Voter turnout was 92.6%. This election was the last one in Belgian history where a single party achieved an absolute majority. Elections for the nine provincial councils were also held.
A referendum on the Maastricht Treaty was held in France on 20 September 1992. It was approved by only 51% of the voters. The result of the referendum, known as the "petit oui", along with the Danish "No" vote are considered to be signals of the end of the "permissive consensus" on European integration which had existed in most of continental Europe until then. From this point forward issues relating to European integration were subject to much greater scrutiny across much of Europe, and overt euroscepticism gained prominence. Only France, Ireland and Denmark held referendums on Maastricht ratification.
A referendum on the enlargement of the European Communities (EC) was held in France on 23 April 1972. Voters were asked whether they approved of Denmark, Ireland, Norway and the United Kingdom joining the EC, although Norway later voted in its own referendum not to join. The proposals were approved by 68.3% of voters, with a turnout of 60.2%.
A referendum on joining the Eurozone was held in Denmark on 28 September 2000. It was rejected by 53.2% of voters with a turnout of 87.6%.
A referendum on the Amsterdam Treaty was held in Denmark on 28 May 1998. It was approved by 55.1% of voters with a turnout of 76.2%. The treaty subsequently came into effect on 1 May 1999.
A referendum on the Maastricht Treaty was held in Denmark on 2 June 1992. It was rejected by 50.7% of voters with a turnout of 83.1%. The rejection was a blow to the process of European integration, although the process continued. The result of the referendum, along with the "petit oui" in the French Maastricht referendum signaled the end of the "permissive consensus" on European integration which had existed in most of continental Europe until then. This was expressed by Pascal Lamy, chef de cabinet for Jacques Delors, the president of the European Commission, who remarked that, "Europe was built in a Saint-Simonian [i.e., technocratic] way from the beginning, this was Monnet's approach: The people weren't ready to agree to integration, so you had to get on without telling them too much about what was happening. Now Saint-Simonianism is finished. It can’t work when you have to face democratic opinion." From this point forward issues relating to European integration were subject to much greater scrutiny across much of Europe, and overt euroscepticism gained prominence. Only France, Denmark and Ireland held referendums on Maastricht ratification.
A second referendum on the Maastricht Treaty was held in Denmark on 18 May 1993. After rejecting the treaty in a referendum the previous year, this time it was approved by 56.7% of voters with an 86.5% turnout.
A referendum on lowering the voting age from 20 to 18 was held in Denmark on 19 September 1978. It was held after the Danish government lowering the age of majority from 20 to 18 in 1976. The change was approved by 53.8% of voters with a turnout of 63.2%. The electoral age had previously been lowered from 21 to 20 in a 1971 referendum, after a 1969 referendum had rejected lowering the electoral age to 18.
A referendum on the sale of the Danish West Indian Islands to the United States of America was held in Denmark on 14 December 1916. The non-binding referendum saw 283,670 vote in favor of the sale of the Danish West Indian Islands and 158,157 against. The residents of the islands were not allowed to vote on the matter, but in an unofficial vote on Saint Croix arranged by David Hamilton Jackson, 4,027 voted in favor of the sale and only seven voted against. As a result of the referendum the islands were formally relinquished to the United States by the Treaty of the Danish West Indies on 31 March 1917 as the United States Virgin Islands for a sum of US$25,000,000 in gold.
A referendum on land laws was held in Denmark on 25 June 1963. The four land laws, which had already been passed by the Danish parliament, were rejected by voters. This is the only time in Danish history that a law passed by parliament was sent to a public referendum by a minority in parliament.
A constitutional and electoral age referendum was held in Denmark on 28 May 1953. Both proposals were approved by voters, leading to both a new constitution taking effect on 5 June, and the electoral age being lowered from 25 to 23 years, also starting on 5 June. Voter turnout was 59.1% for the constitution question and 57.1% for the voting age question.
A referendum on reducing the voting age from 23 to 21 was held in Denmark on 30 May 1961. It was approved by 55% of voters with a 37.3% turnout.
A constitutional referendum was held in Denmark on 6 September 1920. It was held in order to make changes to the constitution of Denmark from 1915 that had been made necessary to facilitate the reunification of Southern Jutland into the kingdom of Denmark. The changes were approved by 96.9% of voters, with a 49.6% turnout. A total of 614,227 of the 1,291,745 registered voters voted in favour, meaning that 47.6% of eligible voters had voted for the proposals, above the 45% required by the constitution.
A referendum on joining the European Union was held in Poland on 7 and 8 June 2003. The proposal was approved by 77.6% of voters. Poland subsequently joined the European Union that year following the ratification of the Treaty of Accession 2003. The country's first European Parliament elections were held in 2004.
A constitutional referendum was held in Iceland between 20 and 23 May 1944. The 1 December 1918 Danish–Icelandic Act of Union declared Iceland to be a sovereign state separate from Denmark, but maintained the two countries in a personal union, with the King of Denmark also being the King of Iceland. In the two-part referendum, voters were asked whether the Union with Denmark should be abolished, and whether to adopt a new republican constitution. Both measures were approved, each with more than 98% in favour. Voter turnout was 98.4% overall, and 100% in two constituencies, Seyðisfirði and Vestur-Skaftafjellssýsla.
A referendum on the Act of Union with the Kingdom of Denmark was held in Iceland on 19 October 1918. Voters were asked whether they approved of the Act, which would lead to Iceland becoming a separate kingdom under the Danish Crown, making the country a sovereign state in a personal union with Denmark. It was approved by 92.6% of voters.
