Istanbul and Varna Time Zone Comparison
The distance between Istanbul and Varna is felt not just in kilometers, but in time zones too. Geographically, Istanbul sits in the Middle East while Varna is located in Europe.
Because Istanbul and/or Varna observe daylight saving time for part of the year, the gap between them isn't fixed — it ranges between 0 and 1 hours depending on the season.
With such a small gap, scheduling a call between Istanbul and Varna is easy — a normal business-hours slot works for both sides on the same calendar day.