Istanbul and Dusseldorf Time Zone Comparison
Istanbul and Dusseldorf are two major cities that sit in noticeably different time zones. Geographically, Istanbul sits in the Middle East while Dusseldorf is located in Europe.
Because Istanbul and/or Dusseldorf 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 Dusseldorf is easy — a normal business-hours slot works for both sides on the same calendar day.