Slovak koruna
Slovakia switched its currency from the koruna to the euro on 1 January 2009, at a rate of 30.1260 korunas per euro.
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.