Until this year Turkey was using daylight saving time, staying UTC+2 on winter period, UTC+3 on summer. This year it is decided to stay only in UTC+3.
Our DateTime's are persisted on MySQL (5.26.34) db (on AWS) was using UTC timezone.
When i try to use CONVERT_TZ(DateTime, UTC, EUROPE/ISTANBUL) for recent datetime -lets say- 2016-11-21 00:00 it tries to convert according to UTC+2, whereas it suppose to be UTC+3.
When i would tried to convert 2015-11-21 00:00 -last year- it suppose to convert according to UTC+2, since Turkey was in UTC+2 at that time.
I Found an announcement on AWS forum[1], advicing to use Moscow timezone, which is not an option for us since Turkey's timezone situation is unique and our DateTime's are saved in the form of UTC0.