Lithuanian European Union membership referendum, 2003

The 2003 Lithuanian European Union referendum took place from 10 May to 11 May 2003 to decide whether Lithuania should join the European Union (EU). Over 90% of those who voted supported membership and Lithuania joined the EU on 1 May 2004.

Lithuania was invited to begin negotiations to join the EU in December 1999 at a European Council summit in Helsinki and was formally invited to join the EU in December 2002 at a summit in Copenhagen.

In June 2002 and February 2003 the Lithuanian Parliament amended Lithuania's laws on referendums. Previously, for a referendum to pass, 50% of the voters had to vote and over 50% of all eligible registered voters had to support the proposal. After the amendment only a simple majority of participants in favour was required for the referendum to pass, while still having the requirement for turnout to be over 50%. To help reach the turnout requirement, the voting hours were extended, postal voting was allowed for 11 days before the referendum, and a second voting day was added. Parliament then set the date for EU referendum to be the 10–11 May and set the question for the vote.

Lithuanian voters were asked to vote yes or no to the statement:

I am for Lithuania's membership of the European Union.

An information campaign on the European Union was begun in 2000 and involved the Elderships of Lithuania and the Catholic church. Opinion polls, which at the end of 1999 had only 29% supporters of the EU, showed a steady rise in support in the years leading up to the referendum.

Virtually all of Lithuania's major political parties supported membership of the EU and opinion polls as the date approached showed about 65% of voters would vote yes. The President of Lithuania Rolandas Paksas, who once competed in aerobatics competitions, flew around Lithuania in his plane performing stunts to raise enthusiasm. The campaign was very one-sided with only a poorly organised No campaign based on milk producers, Russian speakers and right wing nationalists.

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