Istanbul and Vienna Time Zone Comparison
The distance between Istanbul and Vienna is felt not just in kilometers, but in time zones too. Istanbul is Turkey's largest city and historic capital, uniquely straddling Europe and Asia across the Bosphorus strait. Vienna, the capital of Austria, has long served as a hub for international diplomacy and hosts one of the United Nations' main European offices.
Because Istanbul and/or Vienna observe daylight saving time for part of the year, the gap between them isn't fixed — it ranges between 1 and 2 hours depending on the season.
With such a small gap, scheduling a call between Istanbul and Vienna is easy — a normal business-hours slot works for both sides on the same calendar day.