(FILES) This file photograph taken in Helsinki on December 18, 2001, shows Euro coins and banknote displayed on an euro symbol. Due to international time differences, Finland and Greece issued new euro banknotes and coins one hour earlier than the other ten countries in the euro area, on January 1, 2002. – January 1, 2022 marks the 20th anniversary of the euro entering circulation. It has since become the currency of 19 EU countries. (Photo by MARTTI KAINULAINEN / AFP)