Timeline

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Accession of Bosnia and Herzegovina to the European UnionAccession of Serbia to the European UnionAccession of Iceland to the European UnionAccession of Albania to the European UnionAccession of Montenegro to the European UnionAccession of North Macedonia to the European UnionAccession of Croatia to the European Union2003 Slovenian European Union and NATO membership referendum2003 Czech European Union membership referendumBulgaria2003 Lithuanian European Union membership referendum2003 Estonian European Union membership referendum2003 Latvian European Union membership referendum2003 Slovak European Union membership referendumSnagov Declaration2003 Polish European Union membership referendum2003 Hungarian European Union membership referendumSwitzerland – European Union relationsFinland1994 Swedish European Union membership referendum2003 Maltese European Union membership referendumCyprus1994 Austrian European Union membership referendumMorocco – European Union relationsAccession of Turkey to the European UnionAccession of Portugal to the European UnionAccession of Greece to the European UnionNorway – European Union relationsAccession of Spain to the European UnionDenmarkUnited Kingdom – European Union relationsRepublic of IrelandTreaty of Paris (1951)Treaty of Paris (1951)Treaty of Paris (1951)Treaty of Paris (1951)Treaty of Paris (1951)Treaty of Paris (1951)