New York to Seoul Time Difference

Working across New York and Seoul

The offset between New York and Seoul is not a fixed number. The two cities may observe daylight saving time on different dates — or one may stay on standard time year-round — which means the gap can shift by an hour twice a year. If you are scheduling a recurring meeting, store it as a local time in one city and let the calendar of the other city convert it automatically, rather than hard-coding a UTC offset that will drift the next time the clocks change.

When preparing a meeting invite, be explicit about which city you mean. A time like 3:00 PM in a calendar invite with no timezone is ambiguous; 3:00 PM New York time is clear and leaves no room for error. Most calendar apps show the meeting in the local timezone of the recipient automatically, but email invites and chat messages often lose this metadata, so the wording still matters.

How this converter stays accurate

The offset you see here is computed from the current IANA timezone database, which tracks historical and scheduled DST rule changes for every region worldwide. When a country shifts or cancels DST — as several have done in recent years — the underlying data updates and the conversion follows, with no manual adjustment on your part. The live widget at the top of the page uses the built-in timezone engine of your browser, so it reflects the rules in effect right now.

The best-meeting-time suggestion overlaps the standard 09:00–17:00 business day in both cities. If your team uses different working hours — a common reality for engineering teams with flexible schedules — treat the suggestion as a starting point rather than a hard constraint. Some teams pick a smaller overlap block of just two or three hours for synchronous work and reserve the rest of the day for independent focus, which often works better than trying to match a full workday when the offset is large.