There is no time difference between Amsterdam and Berlin. Both cities use Central European Time (CET, UTC+1) in winter and Central European Summer Time (CEST, UTC+2) in summer. When it's 9:00 AM in Amsterdam, it's also 9:00 AM in Berlin.
Both cities observe daylight saving time on the same dates (last Sunday of March to last Sunday of October), so they remain synchronized year-round.
Any time works! Since both cities share the same timezone, you can schedule calls during standard business hours (9:00 AM - 5:00 PM) without any time conversion needed.
Amsterdam and Berlin are connected by frequent high-speed trains (about 6 hours) and multiple daily flights (about 1 hour). Both are major business hubs in the European Union.