Add Estambul (Turquía) to your list and use my-locations table to visually convert it's time to another timezone or city time.
Mouse over the colored hour-tiles and glance at the hours selected by the column.

Current time zone for Estambul (Turquía) is Europe/Istanbul, whose offset is GMT+3 from Greenwich Mean Time (GMT).

The IANA timezone identifier for Estambul, Turquía is "Europe/Istanbul"

It currently does not observe Daylight Savings Time.