Обсуждение: Ethiopian calendar year(DATE TYPE) are different from the Gregoriancalendar year

yes it works on my machine,it coverts from Gregorian calendar year to Ethiopian calendar year.

Swift ,C# & Java languages locally we have app to convert it, but i can't get it from them,it is as a commercial,Also ORACLE DB localize it.Oracle DB also use for commercial,

I want to Localize in PostgreSQL.it works as an EXTENSION, how it be localized to Postgresql?