Events from the year 2007 in the European Union. Incumbents Commission President – José Manuel Barroso, People's Party Council Presidency – Germany (January–June) and Portugal (July–December) Parliament President – Josep Borrell, Socialists (to 16 January). Hans-Gert Pöttering, People's Party High Representative – Javier Solana, Socialists Events 1 January – Bulgaria and Romania join the European Union. 1 January – Slovenia adopts the Euro as its official currency, replacing the tolar. 1 January – Irish becomes the 23rd official language of the EU. 1 January – Germany takes over the EU Presidency. 9 January – far right MEPs form a political group called Identity, Tradition and Sovereignty. 25 March – Berlin Declaration signed to mark the 50th anniversary of the Treaty of Rome. 1 June – The REACH directive, described as "most important piece of EU legislation for 20 years", comes into force. 23 June – EU leaders agree to a Reform Treaty (later named Treaty of Lisbon) to replace the Treaty establishing a Constitution for Europe rejected by Dutch and French voters in referendums. 1 July – Portugal takes over the Presidency from Germany. 23 July – Intergovernmental Conference on the Treaty of Lisbon starts. 13 December 2007 – Signing of the Treaty of Lisbon 21 December – Czech Republic, Estonia, Hungary, Latvia, Lithuania, Malta, Poland, Slovakia and Slovenia implement the Schengen Agreement for overland borders and seaports. References External links Video: What has Europe done for you in 2007? Years of the 21st century in the European Union 2000s in the European Union