Euro cheques, electronic transfers, banking, etc.) at midnight on 1 January 1999, when the national currencies of participating countries (the eurozone) ceased to exist independently. Their exchange rates were locked at fixed rates against each other. The euro thus became the successor to the European Currency Unit (ECU). The notes and coins for the old currencies, however, continued to be used as legal tender until new euro notes and coins were introduced on 1 January 2002. The changeover period during which the former currencies' notes and coins were exchanged for those of the euro lasted about two months, until 28 February
International status and usage of the euro euro exceed dollar reserves for the first time; Russia held 47.5% (up from 42% in 2008) in euro and 41.5% (down from 47%) in dollar leading the Central Bank of Russia to announce the euro had become the reserve currency of Russia. The usage of the euro is particularly strong in eastern Europe, not surprisingly in those that have joined the EU, with 54.8% of all loans in Bulgaria, and 85.2% in Latvia before Eurozone accession, being issued in euro rather than the local currencies. The following table shows central banks allocated reserves in euros and US dollar. A currency