Istanbul and Omdurman Time Zone Comparison
Istanbul and Omdurman are two major cities that sit in noticeably different time zones. Istanbul and Omdurman sit on different continents, in noticeably different time zones, and neither observes daylight saving time.
Omdurman is always 1 hour behind Istanbul, with no seasonal change, since neither city's daylight saving rules shift this relationship.
With such a small gap, scheduling a call between Istanbul and Omdurman is easy — a normal business-hours slot works for both sides on the same calendar day.