There is no time difference between Copenhagen and Stockholm. Both cities use Central European Time (CET, UTC+1 in winter and CEST, UTC+2 in summer). When it's 9:00 AM in Copenhagen, it's also 9:00 AM in Stockholm.
Both Nordic capitals 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.
Copenhagen and Stockholm are connected by a 1-hour flight or the famous Öresund Bridge to Malmö, then train to Stockholm. Both are leading Scandinavian tech and startup hubs.