Istanbul and London Time Zone Comparison
Istanbul and London are two major cities that sit in noticeably different time zones. Istanbul is Turkey's largest city and historic capital, uniquely straddling Europe and Asia across the Bosphorus strait. London, the capital of the United Kingdom, is one of the world's leading financial centers, and much of global banking and stock-market activity is scheduled around London time.
Because Istanbul and/or London observe daylight saving time for part of the year, the gap between them isn't fixed — it ranges between 2 and 3 hours depending on the season.
With a moderate gap like this, it's worth checking the suggested call window above before scheduling a meeting between Istanbul and London.