Best Meeting Time: Seoul to London

Seoul sits nine hours ahead of London in winter and eight hours ahead during British Summer Time, which leaves just one hour of overlap between standard 9am–6pm working days. That single hour, 5–6pm in Seoul and 9–10am in London, is the entire window where both cities are simultaneously at their desks. Anyone scheduling across these two cities needs to plan around it with precision.

Working Across Seoul and London

The most active cross-city relationship between Seoul and London runs through finance and capital markets. South Korean institutional investors, including pension funds and asset managers, maintain active relationships with London-based banks and fund managers. London is the largest financial centre in Europe, and Korean firms seeking European debt or equity exposure transact through it regularly. Technology and consumer electronics also connect the two cities: South Korean manufacturers with European distribution operations keep procurement and logistics teams in dialogue with London counterparts. Legal and professional services firms with Seoul offices and London headquarters run matter updates across the gap. At the office level, Seoul firms tend to operate on a 9am–6pm pattern, though many extend beyond that, reflecting a culture where the 52-hour weekly cap introduced in 2018 set a ceiling rather than a norm. London offices default to roughly 9am–5:30pm, with Fridays winding down noticeably by 4pm. Anyone in either city who has ever waited past 5:30pm Seoul time for a London colleague to reply at 9am will understand immediately why this page exists. The gap is wide enough that asynchronous handoffs, clear deadlines, and a shared calendar discipline matter more than goodwill.

Time Difference: Seoul and London

London is currently 8 hours behind Seoul. The live offsets are Seoul UTC+9 and London UTC+1. Seoul does not observe daylight saving and London observes daylight saving, so the offset shifts twice a year if both sides aren't already aligned.

Seoul runs UTC+9 year-round. South Korea does not observe daylight saving time, so the Seoul clock never moves. London observes British Summer Time, shifting from UTC+0 to UTC+1 each spring. That means the standard-time gap between Seoul and London is 9 hours. During British Summer Time, London gains an hour, closing the gap to 8 hours. The difference narrows from 9 hours to 8 hours when BST begins, and widens back to 9 hours when BST ends in late October. There is no mid-shift complexity caused by one side changing before the other, because Seoul never changes at all. Any time London's clocks move, the Seoul side is unaffected. The current offset listed for London is UTC+1, meaning BST is in effect, so the gap right now is 8 hours. Schedulers should note the autumn changeover date specifically: when London reverts to GMT in late October, any standing meeting set at 9am London time will suddenly land an hour later in Seoul than it did the week before.

Best Times to Meet

The overlap between Seoul and London is 1 hour: 5–6pm in Seoul and 9–10am in London. That is the only window where both cities are within standard working hours simultaneously. Inside that 1-hour window, the cleanest slot is typically 9am–9:30am London time, which is 5–5:30pm in Seoul. Starting at 9am London gives the Seoul side a meeting before their working day formally closes, and it gives the London side time to act on any outputs before their own morning fills. A 9:30am London start is workable but it compresses the Seoul end significantly, as Seoul team members are at the very edge of their day. London's 12:30–1:30pm lunch window is not relevant here because it falls in the early hours of the following Seoul morning. Scheduling anything outside the 5–6pm Seoul / 9–10am London band requires one side to give ground: either Seoul meets outside normal hours or London starts before 9am. Finance teams in London, who are sometimes in before standard hours, occasionally accommodate 8am calls, which would correspond to 4pm in Seoul during BST.

These conversions use the current 8-hour gap (BST in effect in London). 9am Monday in Seoul = 1am Monday in London. London is not yet open; this time only works for async messages. 1pm Monday in Seoul = 5am Monday in London. Still before any reasonable London start; one side must concede. 5pm Monday in Seoul = 9am Monday in London. This is the overlap window. Both cities are within working hours, and it is the standard recommended slot for live meetings between Seoul and London. During winter (GMT, 9-hour gap): 5pm Monday in Seoul = 8am Monday in London, which is before the standard London open and requires the London side to start early.

Working Hours Overlap Explained

Seoul operates on Asia/Seoul (currently UTC+9). London operates on Europe/London (currently UTC+1). The table below maps a standard 9:00 AM–6:00 PM day in Seoul to London's local time.

Tips for Scheduling Across Seoul and London

• Seoul never observes DST. Any clock-change in London shifts the Seoul overlap by a full hour without any change on the Korean side.
• The entire overlap between Seoul and London is 1 hour. Protect 9–9:30am London time for the most reliable joint window.
• Seollal and Chuseok each close Seoul offices for three to four days. Check the lunar calendar dates in January and September each year.
• London Fridays wind down by 4pm. The 9–10am Friday overlap window is still usable, but treat it as the last reliable slot of the week.
• Finance teams in London sometimes start at 8am. During BST that maps to 4pm Seoul, adding a small buffer before the standard 5pm overlap.

Public Holidays and Working Weeks

Seoul's working week runs Monday to Friday. Friday evenings are often reserved for hoesik, the team dinner culture that sustains office relationships in South Korea. Business meetings scheduled late on a Friday in Seoul are unusual and tend to be poorly attended. London Fridays have their own rhythm: the cultural norm is that offices wind down by 4pm, which means the 9–10am London overlap window on a Friday is fine, but expecting a London colleague to be fully responsive at 5pm on a Friday is optimistic. On the holiday side, Seoul observes Seollal (Lunar New Year) and Chuseok, both of which bring three to four days of national closures. The exact dates shift each year because both follow the lunar calendar. A Seoul counterpart disappearing for nearly a week with no warning is a real scheduling risk for London teams unfamiliar with these holidays. London's major fixed holidays include New Year's Day on 1 January, the May Bank Holiday on the first Monday in May, and Christmas Day on 25 December. Neither city observes religious observances that create broadly observed mid-week work stoppages beyond the public holidays listed. Cross-city meeting planners should keep both holiday calendars open simultaneously, particularly in January or February and again in September or October, when Korean closures are most likely to land.

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