There is no time difference between Oslo and Copenhagen. Both cities use Central European Time (CET/CEST). When it's 12:00 PM in Oslo, it's also 12:00 PM in Copenhagen.
Both cities observe daylight saving time on the same schedule, 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.
Oslo and Copenhagen are closely connected Scandinavian capitals. They're just an hour apart by flight, and there are also ferry connections. Business ties are strong, especially in shipping, energy, and design.