Eurozone
The eurozone - officially called the euro area - is the collective name for all countries which are members of Europe's economic and monetary union. As of 2019, it consists of 19 member states:
As of 1 January 1999: Austria, Belgium, France, Finland, Germany, Ireland, Italy, Luxembourg, the Netherlands, Portugal and Spain.
Adopted on 1 January 2001: Greece
Adopted on 1 January 2007: Slovenia
Adopted on 1 January 2008: Cyprus and Malta
Adopted on 1 January 2009: Slovakia
Adopted on 1 January 2011: Estonia
Adopted on 1 January 2014: Latvia
Adopted on 1 January 2015: Lithuania