Original: It was introduced on 1 January 2005, replacing the previous lira (which remained valid in circulation until the end of 2005) at a rate of 1 second lira (ISO 4217 code "TRY") = 1,000,000 first lira (ISO 4217 code "TRL").
Simplified: It was introduced on 1 January 2005, replacing the previous lira (which remained valid in circulation until the end of 2005) at a rate of 1 new lira = 1,000,000 old lira.