Slovak euro coins
Slovakia has been a member of the European Union since May 2004, and is a member of the European Economic and Monetary Union. Slovakia adopted the euro on 1 January 2009, replacing its previous currency, the Slovak koruna.
European Exchange Rate Mechanism
As of 2016, only the Danish krone participates in ERM II. The currencies of Sweden (the Swedish krona), the three largest countries which joined the European Union on 1 May 2004 (the Polish złoty, the Czech koruna, and the Hungarian forint), the two countries which joined on 1 January 2007 (the Bulgarian lev, and the Romanian leu) as well Croatia, which joined the EU on 1 July 2013 (the Croatian kuna), are required to join in accordance with the terms of the applicable treaties of accession.