Euro banknotes entered circulation on 23 September 2014. The full design of the Europa series 20 euro banknote was revealed on 24 February 2015, On 4 May 2016, the European Central Bank announced that the Europa series 500 euro banknote would not be released, due to fears of "facilitating the criminal activity". The old series will gradually be withdrawn. The ECB will announce "well in advance" when the old notes will lose their legal tender status. However, they will not lose their value and it will be possible to exchange them for new notes at Eurosystem central banks indefinitely. "A good design
Language and the euro the same as the unit of measurement of time or of angle. The term , plural ("evroleptó", plural "evroleptá") is sometimes used when a speaker wants to be completely specific that they are referring to money and not time. Some colloquial names for currency are also in use for the euro. One and two euro coins are respectively called ("frago") and ("difrago") from the French "franc". A 5 euro banknote is also colloquially called ("taliro") from the Germanic root "thaler" via the Italian "talero". A 10 euro banknote is called ("dekariko"), a 20 euro banknote is called ("eikosariko") or ("eikosari"),