When it is 09:00 in New York it is 23:00 in Seoul in January and 22:00 in July. Seoul is 14 hours ahead New York right now — but it is not constant: the difference is 14 hours ahead in January and 13 hours ahead in July. This page gives the live times in both cities, the overlap between their working days, the daylight saving dates that move the difference, and the best meeting windows.
Try the tool: Time Zone Converter — convert any time between New York and Seoul, with the offset for the date you pick.
Live times in New York and Seoul
The two cities side by side. The January column uses the winter offsets (New York UTC−05:00, Seoul UTC+09:00); the July column uses the summer offsets (New York UTC−04:00, Seoul UTC+09:00).
| Time in New York | Seoul in January | Seoul in July |
|---|---|---|
| 00:00 | 14:00 | 13:00 |
| 06:00 | 20:00 | 19:00 |
| 09:00 | 23:00 | 22:00 |
| 12:00 | 02:00 | 01:00 |
| 15:00 | 05:00 | 04:00 |
| 17:00 | 07:00 | 06:00 |
| 21:00 | 11:00 | 10:00 |
The world clock shows the current time in both cities live, and the individual city pages — time in New York and time in Seoul — explain each city's time zone, offsets and daylight saving in full.
The time difference between New York and Seoul
The difference is not constant. In January Seoul is 14 hours ahead New York; in July it is 13 hours ahead New York. The difference changes on Sunday, 8 March 2026 (from 14 hours ahead to 13 hours ahead) and Sunday, 1 November 2026 (from 13 hours ahead to 14 hours ahead) — those are the dates when one of the two cities changes its clocks and the other does not, or when they change on different days. Between those dates the difference is one value; outside them it is the other.
To convert a time, add the difference: 09:00 in New York is 23:00 in Seoul in January and 22:00 in July; 17:00 in New York — the end of the working day — is 07:00 in Seoul in January and 06:00 in July. To go the other way, subtract it: 09:00 in Seoul is 19:00 in New York in January. The time difference calculator does the arithmetic for any date, and the UTC to Seoul page gives the full conversion table for Seoul.
Meeting overlap between New York and Seoul
The overlap is the hours when both cities are in their working day (09:00–17:00 local time). The table marks the overlapping hours in New York's working day and shows what time they are in Seoul.
January
| New York time | Seoul time | Both working? |
|---|---|---|
| 09:00 | 23:00 | Yes |
| 10:00 | 00:00 | Yes |
| 11:00 | 01:00 | Yes |
| 12:00 | 02:00 | Yes |
| 13:00 | 03:00 | Yes |
| 14:00 | 04:00 | Yes |
| 15:00 | 05:00 | Yes |
| 16:00 | 06:00 | Yes |
July
| New York time | Seoul time | Both working? |
|---|---|---|
| 09:00 | 22:00 | No |
| 10:00 | 23:00 | No |
| 11:00 | 00:00 | No |
| 12:00 | 01:00 | No |
| 13:00 | 02:00 | No |
| 14:00 | 03:00 | No |
| 15:00 | 04:00 | No |
| 16:00 | 05:00 | No |
In January the overlap is 8 hours: 09:00, 10:00, 11:00, 12:00, 13:00, 14:00, 15:00, 16:00 New York time. In July it is 0 hours: there is no hour when both cities are in their working day. The meeting planner finds the overlap for any two cities and any date, and the meeting time finder finds it for a whole team.
Daylight saving in New York and Seoul
New York observes daylight saving: in 2026 the clocks go forward on 8 March 2026 and back on 1 November 2026, moving the offset from UTC−05:00 to UTC−04:00.
Seoul does not observe daylight saving, so its offset of UTC+09:00 never changes.
The difference changes on Sunday, 8 March 2026 and Sunday, 1 November 2026 in 2026. On those dates, one city changes its clocks and the other does not — or they change on different days — so the difference moves by an hour. A standing meeting set in one city's local time will land an hour early or late on the other side until the second city catches up. The fix is to set the calendar event in UTC, or to check the overlap again after each change. The individual DST pages — New York DST 2026 and Seoul DST 2026 — give the exact dates for each city.
Best meeting windows
The best windows in January are 09:00–17:00 in New York (23:00–07:00 in Seoul). These are the hours inside both working days, so nobody is up early or late. It is a short window, so keep the meeting short and send an agenda in advance.
Calling and travel notes
When it is 09:00 in New York it is 23:00 in Seoul in January; when it is 12:00 in New York it is 02:00 in Seoul; when it is 17:00 in New York it is 07:00 in Seoul. The difference is 12 hours or more, so the two cities are on different dates for part of the day: when it is Monday morning in New York, it is still Sunday in Seoul if Seoul is behind, or already Monday evening if it is ahead. Always state the date as well as the time when you schedule across this pair. Scheduling between the Americas and Asia is the hardest case in time-zone work: the difference is 12 hours or more, so one side's working day is the other's night. The only workable approach is to meet at the edge of the day — early morning in New York and evening in Seoul, or the reverse — and to keep the meeting short. Rotate the awkward hour week by week, or the same side will always be the one giving up its evening. Record the meeting and share notes, so the side that could not attend can still follow the decision.
Worked conversions
Six conversions, for January (offsets New York UTC−05:00, Seoul UTC+09:00):
| New York | Seoul |
|---|---|
| 08:00 | 22:00 |
| 09:00 | 23:00 |
| 12:00 | 02:00 |
| 14:00 | 04:00 |
| 17:00 | 07:00 |
| 20:00 | 10:00 |
In July, add 1 hour to each Seoul time. For the reverse direction, see Seoul to New York time.
New York and Seoul at a glance
| Fact | New York | Seoul |
|---|---|---|
| Country | United States | South Korea |
| Region | Americas | Asia |
| IANA time zone | America/New_York |
Asia/Seoul |
| Standard offset | UTC−05:00 | UTC+09:00 |
| Daylight saving offset | UTC−04:00 | — does not observe |
| Offset in January 2026 | UTC−05:00 | UTC+09:00 |
| Offset in July 2026 | UTC−04:00 | UTC+09:00 |
| Observes daylight saving | Yes | No |
The table is the whole pair in one place. The two numbers that matter most are the January and July offsets: if they are the same in both columns for a city, that city's offset never changes; if they differ, the city observes daylight saving and the difference between the cities moves with it. The individual city pages — time in New York and time in Seoul — explain each city's time zone, and the DST pages — New York DST 2026 and Seoul DST 2026 — give the exact change dates.
Frequently asked questions
What is the time difference between New York and Seoul?
Seoul is 14 hours ahead New York right now. In January the difference is 14 hours ahead and in July it is 13 hours ahead — it changes with daylight saving.
How do I schedule a recurring meeting between New York and Seoul?
Pick a time inside the overlap — 09:00–17:00 New York time — and set the calendar event in UTC so it moves correctly when the clocks change. Re-check the overlap in March and October, when the difference moves, and rotate the time if the meeting falls outside someone's working day.
What time is it in Seoul when it is 09:00 in New York?
It is 23:00 in January and 22:00 in July. The time zone converter gives the answer for any date.
What is the best time for a meeting between New York and Seoul?
The best windows in January are 09:00–17:00 New York time — inside both working days.
Does the time difference between New York and Seoul change during the year?
Yes. It changes on Sunday, 8 March 2026 and Sunday, 1 November 2026 in 2026, when one city changes its clocks and the other does not.
What time is it in New York when it is 09:00 in Seoul?
It is 19:00 in January and 20:00 in July. See Seoul to New York time for the full comparison from Seoul's side.
What are the time zones of New York and Seoul?
New York is in America/New_York (UTC−05:00 standard time) and Seoul is in Asia/Seoul (UTC+09:00 standard time).
What time is it in New York when it is midnight in Seoul?
It is 10:00 in New York in January and 11:00 in July — the same day, because New York is ahead of Seoul. Midnight conversions are the ones that most often land on the wrong date, so always check the date as well as the time.
Sources
- IANA Time Zone Database, via Node.js Intl (
Intl.DateTimeFormatwithtimeZone) — offsets, daylight saving dates and local times in this article were worked out from the IANA database, not typed from memory. - TimeFlow's own time-zone data (
data/cities.ts,data/dst.ts), computed from the IANA database. - TimeFlow's time zone converter and meeting planner — the live tools behind the numbers on this page.
- Time-zone and daylight saving rules are set by governments and can change. For flights, deadlines and meetings that cannot move, confirm the time with an official source.