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