What time zone did Turkey adopt permanently in September 2016?

Turkey adopted Turkey Time permanently in September 2016. Turkey Time, abbreviated TRT, keeps the country at UTC+03:00 throughout the year.

Before the change, Turkey generally used Eastern European Time at UTC+02:00 in winter and Eastern European Summer Time at UTC+03:00 during daylight-saving months. The 2016 decision effectively made the summer offset permanent, so clocks no longer moved back to UTC+02:00 in autumn. Turkey’s IANA time-zone identifier is Europe/Istanbul.

The wording can cause confusion because Turkey Time is not simply another name for Eastern European Time. During the warmer part of the year, Turkey Time coincides numerically with Eastern European Summer Time, but during the rest of the year it is one hour ahead of standard Eastern European Time. It also matches Moscow Time and Arabia Standard Time at UTC+03:00, although those systems belong to different countries and regional naming conventions.