Seoul to New York
-13hSeoul
KSTSOURCENew York
EDTGreen rows indicate typical business hours (9 AM - 5 PM)
KST and EDT on the World Map
The map below highlights the KST (Korea Standard Time) and EDT (Eastern Standard Time) timezone regions across the globe.
KST – Korea Standard Time
UTC+09:00Korea Standard Time (KST) is the time zone for South Korea, 9 hours ahead of UTC.
- •South Korea does not observe daylight saving time.
- •Seoul is home to Samsung, LG, and Hyundai headquarters.
- •KST is the same offset as JST (UTC+09:00).
EST – Eastern Standard Time
UTC-05:00Eastern Standard Time (EST) is the time zone for the eastern United States and Canada, 5 hours behind UTC.
- •EST is the most widely used time zone in the United States by population.
- •The New York Stock Exchange (NYSE) and NASDAQ operate on Eastern Time, opening at 9:30 AM EST.
- •23 US states are fully or partially in the Eastern Time Zone.
- •EST was established by the Standard Time Act of 1918.
- •Over 47% of the US population lives in the Eastern Time Zone.
About Seoul
WikipediaSeoul operates on Korea Standard Time (KST), UTC+9, same as Japan. As a global tech and entertainment hub, Seoul coordinates with East Asian markets.
Seoul has the fastest average internet speed in the world.
About New York
WikipediaNew York City, the financial capital of the world, operates on Eastern Time (EST/EDT). Home to Wall Street and the NYSE, NYC is crucial for global business coordination.
New York City has more than 800 languages spoken, making it the most linguistically diverse city in the world.
Seoul vs New York: Offsets, DST and Best Call Times
Seoul runs on Korean Standard Time (KST) at UTC+09:00. New York runs on Eastern Daylight Time (EDT) at UTC-04:00, also currently on daylight saving time. That puts Seoul 13 hours behind New York — a difference of -13h at the current offsets.
In practice, when it is 9:00 AM in Seoul it is 8:00 PM in New York on the previous day. Midnight in Seoul is 11:00 AM in New York.New York observes daylight saving time while Seoul does not, so the gap narrows or widens by an hour part of the year.
Seoul to New York time conversion table
| Seoul (KST) | New York (EDT) | Day |
|---|---|---|
| 12:00 AM | 11:00 AM | previous day |
| 6:00 AM | 5:00 PM | previous day |
| 7:00 AM | 6:00 PM | previous day |
| 8:00 AM | 7:00 PM | previous day |
| 9:00 AM | 8:00 PM | previous day |
| 12:00 PM | 11:00 PM | previous day |
| 3:00 PM | 2:00 AM | same day |
| 5:00 PM | 4:00 AM | same day |
| 6:00 PM | 5:00 AM | same day |
| 9:00 PM | 8:00 AM | same day |
Why people convert Seoul to New York time
- Scheduling a call from Seoul to New York: a 10:00 AM start in Seoul lands at 9:00 PM in New York the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -13h gap: Seoul and New York have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in New York is 8:00 PM in Seoul.
- Booking travel or deliveries: tracking New York local time against Seoul keeps pickup windows and arrival estimates honest across the -13h offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM KST" is unambiguous; "3 PM" across a -13h gap is not.
- With a -13h gap there is no shared 9-to-5 window, so alternate the early start: one week Seoul takes the early slot, the next week New York does.
- New York: Clocks fall back on Sun, Nov 1, 2026. Any meeting series spanning that date will shift by an hour in local time.
About KST (Korea Standard Time)
Korea Standard Time (KST) is the time zone used in South Korea. It shares the same UTC offset as Japan Standard Time but is a distinct time zone. South Korea does not observe daylight saving time. Seoul, the capital, is a major global tech and business hub.
About EST (Eastern Standard Time)
Eastern Standard Time (EST) is observed during the winter months in the eastern part of North America. It covers 23 US states and parts of Canada including Ontario and Quebec. EST is the most populous time zone in the United States, home to major financial centers like New York City and global organizations headquartered in Washington D.C. During daylight saving time (March–November), clocks shift to Eastern Daylight Time (EDT, UTC-04:00). The time zone also covers parts of the Caribbean and Central America including Panama, Jamaica, and the Cayman Islands.
Best time to call between Seoul and New York
With a -13h offset there is no overlap inside a normal 9 AM – 5 PM day. New York opens at 9:00 AM EDT, which is 8:00 PM in Seoul, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Seoul and New York have no shared working hours because of the -13h gap. Teams need to alternate early starts or rely on asynchronous handovers.
Seoul is 13 hours behind New York (KST UTC+09:00 → EDT UTC-04:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
Seoul
Does not observe DST
New York
☀ Currently in DST
Standard: UTC-05:00 · DST: UTC-04:00
Clocks fall back on Sun, Nov 1, 2026
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between Seoul and New York?
Seoul (KST, UTC+09:00) is 13 hours behind New York (EDT, UTC-04:00). The gap is currently -13h.
How do I convert Seoul time to New York time?
Add -13h to Seoul local time. For example, 9:00 AM in Seoul is 8:00 PM in New York (previous day).
What time is it in New York right now?
New York uses EDT at UTC-04:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -13h offset from Seoul.
What is the best time to call New York from Seoul?
There is no shared working-hours window because of the -13h gap. The closest option is 1:00 PM in Seoul, which is 12:00 AM in New York.
Which is behind, Seoul or New York?
Seoul is 13 hours behind New York. When it is 12:00 PM in Seoul it is 11:00 PM in New York.
Do Seoul and New York use different time zones?
Seoul (South Korea) uses KST at UTC+09:00, while New York (USA) uses EDT at UTC-04:00. The IANA identifiers are Asia/Seoul and America/New_York.
Does daylight saving time affect the Seoul–New York difference?
Yes at the moment: New York is on daylight saving time and Seoul is not, so the -13h gap shifts by an hour when exactly one of them changes clocks.
Which other cities share Seoul's time zone?
KST also covers Seoul, Busan, Incheon, Daegu, Daejeon, Pyongyang.
Which countries use KST, Seoul's zone?
KST is used in South Korea, North Korea.
Is there a day difference between Seoul and New York?
Sometimes. The -13h gap is large enough that 8:00 PM or later in Seoul already falls on the in New York.
What is the time difference between Seoul and New York?
New York is -13h from Seoul.
What timezone is Seoul in?
Seoul operates on Korea Standard Time (KST), UTC+9, same as Japan. As a global tech and entertainment hub, Seoul coordinates with East Asian markets.
What timezone is New York in?
New York City, the financial capital of the world, operates on Eastern Time (EST/EDT). Home to Wall Street and the NYSE, NYC is crucial for global business coordination.
What are the business hours in Seoul?
Standard business hours in Seoul are 9:00 AM - 6:00 PM KST.
What are the business hours in New York?
Standard business hours in New York are 9:00 AM - 5:00 PM EST.
What is the best time to schedule a call between Seoul and New York?
The best overlap for a call is when both cities are in business hours. Seoul works 9:00 AM - 6:00 PM KST and New York works 9:00 AM - 5:00 PM EST (-13h difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Seoul and New York?
Seoul uses KRW (₩) while New York uses USD ($). Check current exchange rates when planning travel or business between these cities.
How do Seoul and New York compare in size?
Seoul has a population of approximately 9.7 million (metro: 25.5 million), while New York has approximately 8.3 million (metro: 20.1 million).
What are the major landmarks in Seoul and New York?
Seoul is known for Gyeongbokgung Palace, N Seoul Tower, Bukchon Hanok Village. New York is famous for Statue of Liberty, Empire State Building, Times Square.
Do Seoul and New York have stock exchanges?
Yes. Seoul has the KRX (Korea Exchange) and New York has the NYSE (New York Stock Exchange). The -13h time difference affects trading hour overlaps between these exchanges.
Which countries use KST (Korea Standard Time)?
KST is used in South Korea, North Korea.
Does KST observe daylight saving time?
No, KST does not observe daylight saving time and remains at UTC+09:00 year-round.
What are some interesting facts about KST?
South Korea does not observe daylight saving time. Seoul is home to Samsung, LG, and Hyundai headquarters.
Which cities are in the EST timezone?
Major cities in the EST timezone include New York City, Washington D.C., Miami, Toronto, Philadelphia, Atlanta, Boston, Montreal.
What is the UTC offset for EST?
Eastern Standard Time (EST) is at UTC-05:00. During daylight saving time, it shifts to EDT.
What should I know about the EST timezone?
EST is the most widely used time zone in the United States by population. The New York Stock Exchange (NYSE) and NASDAQ operate on Eastern Time, opening at 9:30 AM EST.
When is it midnight in Seoul, what time is it in New York?
When it is 12:00 AM (midnight) in Seoul (KST), it is -13h later in New York (EST).
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