9am in Seoul is 1am in London

When it’s 9am in London, it’s 6pm in Seoul. Seoul is 9 hours ahead London. London observes daylight saving time but Seoul does not, so the gap shifts by one hour during clock changes. The best time to schedule calls between the two cities is outside standard hours for at least one city, so flexibility is key. With a large gap separating these two business hubs, most cross-city calls require one team to work outside standard hours. In practice, teams in London tend to take early-morning calls to reach Seoul during standard afternoon hours, while Seoul counterparts can schedule near end of day. Having a standing calendar slot for cross-city calls reduces back-and-forth over scheduling and keeps projects moving efficiently.