9am in New York City is 10pm in Seoul

When it’s 9am in New York City, it’s 11pm in Seoul. Seoul is 14 hours ahead from New York City, placing United States and South Korea far enough apart to require deliberate scheduling. The best window for live calls is early morning in New York City before their business day starts, catching Seoul still in working hours. Corporate travelers and deal-makers on the New York City-Seoul route schedule calls during the shared business-hours window to avoid after-hours meetings on either side. Financial and trade connections between United States and South Korea concentrate activity in that overlap window. The wide gap means one city is often asleep while the other is fully active, so asynchronous tools carry most of the daily communication load. New York City observes daylight saving time while Seoul does not, so the offset narrows by one hour when United States clocks spring forward. Keeping a timezone converter bookmarked helps both sides quickly verify the current time in Seoul before sending a calendar invite.