Hamburg is 2 hours behind Istanbul
Best overlap: 10:00 AM to 6:00 PM in Istanbul is 8:00 AM to 4:00 PM in Hamburg.
Both teams are at their desks between 10:00 AM to 6:00 PM in Istanbul and 8:00 AM to 4:00 PM in Hamburg. You won't be short on options — 8 hours of overlap leaves space for recurring syncs and ad-hoc calls alike. One seasonal catch: Hamburg springs forward and falls back, but Istanbul doesn't, so the gap changes by an hour for several months of the year.