New York to Seoul
+13hNew York
EDTSOURCESeoul
KSTGreen rows indicate typical business hours (9 AM - 5 PM)
EDT and KST on the World Map
The map below highlights the EDT (Eastern Standard Time) and KST (Korea Standard Time) timezone regions across the globe.
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.
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).
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.
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.
Understanding the +13h Gap: New York vs Seoul
New York runs on Eastern Daylight Time (EDT) at UTC-04:00, currently observing daylight saving time. Seoul runs on Korean Standard Time (KST) at UTC+09:00. That puts New York 13 hours ahead of Seoul — a difference of +13h at the current offsets.
In practice, when it is 9:00 AM in New York it is 10:00 PM in Seoul. Midnight in New York is 1:00 PM in Seoul.New York observes daylight saving time while Seoul does not, so the gap narrows or widens by an hour part of the year.
New York to Seoul time conversion table
| New York (EDT) | Seoul (KST) | Day |
|---|---|---|
| 12:00 AM | 1:00 PM | same day |
| 6:00 AM | 7:00 PM | same day |
| 7:00 AM | 8:00 PM | same day |
| 8:00 AM | 9:00 PM | same day |
| 9:00 AM | 10:00 PM | same day |
| 12:00 PM | 1:00 AM | next day |
| 3:00 PM | 4:00 AM | next day |
| 5:00 PM | 6:00 AM | next day |
| 6:00 PM | 7:00 AM | next day |
| 9:00 PM | 10:00 AM | next day |
Why people convert New York to Seoul time
- Scheduling a call from New York to Seoul: a 10:00 AM start in New York lands at 11:00 PM in Seoul, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +13h gap: New York and Seoul 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 Seoul is 10:00 PM in New York.
- Watching a live event or market open: New York viewers need 10:00 PM in Seoul to catch a 9:00 AM start there, and 11:00 AM if the event is anchored to New York.
- Always state the zone abbreviation, not just the hour. "3:00 PM EDT" 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 New York takes the early slot, the next week Seoul does.
- New York: Clocks fall back on Sun, Nov 1, 2026. Re-check this page after that date because the offset changes and so does the +13h gap.
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.
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.
Best time to call between New York and Seoul
With a +13h offset there is no overlap inside a normal 9 AM – 5 PM day. Seoul opens at 9:00 AM KST, which is 10:00 PM in New York, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
New York and Seoul have no shared working hours because of the +13h gap. Teams need to alternate early starts or rely on asynchronous handovers.
New York is 13 hours ahead of Seoul (EDT UTC-04:00 → KST UTC+09:00). 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
New York
☀ Currently in DST
Standard: UTC-05:00 · DST: UTC-04:00
Clocks fall back on Sun, Nov 1, 2026
Seoul
Does not observe DST
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 New York and Seoul?
New York (EDT, UTC-04:00) is 13 hours ahead of Seoul (KST, UTC+09:00). The gap is currently +13h.
How do I convert New York time to Seoul time?
Add +13h to New York local time. For example, 9:00 AM in New York is 10:00 PM in Seoul.
What time is it in Seoul right now?
Seoul uses KST at UTC+09:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +13h offset from New York.
What is the best time to call Seoul from New York?
There is no shared working-hours window because of the +13h gap. The closest option is 1:00 PM in New York, which is 2:00 AM in Seoul.
Which is ahead, New York or Seoul?
New York is 13 hours ahead of Seoul. When it is 12:00 PM in New York it is 1:00 AM in Seoul.
Do New York and Seoul use different time zones?
New York (USA) uses EDT at UTC-04:00, while Seoul (South Korea) uses KST at UTC+09:00. The IANA identifiers are America/New_York and Asia/Seoul.
Does daylight saving time affect the New York–Seoul 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 New York's time zone?
EDT also covers New York City, Washington D.C., Miami, Toronto, Philadelphia, Atlanta, Boston, Montreal and 8 more.
Which countries use EDT, New York's zone?
EDT is used in United States (Eastern), Canada (Ontario, Quebec), Mexico (Quintana Roo), Panama, Jamaica, Cayman Islands, Haiti, Bahamas and 4 more.
Is there a day difference between New York and Seoul?
Sometimes. The +13h gap is large enough that 8:00 PM or later in New York already falls on the next day in Seoul.
What is the time difference between New York and Seoul?
Seoul is +13h from New York.
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 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 are the business hours in New York?
Standard business hours in New York are 9:00 AM - 5:00 PM EST.
What are the business hours in Seoul?
Standard business hours in Seoul are 9:00 AM - 6:00 PM KST.
What is the best time to schedule a call between New York and Seoul?
The best overlap for a call is when both cities are in business hours. New York works 9:00 AM - 5:00 PM EST and Seoul works 9:00 AM - 6:00 PM KST (+13h difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in New York and Seoul?
New York uses USD ($) while Seoul uses KRW (₩). Check current exchange rates when planning travel or business between these cities.
How do New York and Seoul compare in size?
New York has a population of approximately 8.3 million (metro: 20.1 million), while Seoul has approximately 9.7 million (metro: 25.5 million).
What are the major landmarks in New York and Seoul?
New York is known for Statue of Liberty, Empire State Building, Times Square. Seoul is famous for Gyeongbokgung Palace, N Seoul Tower, Bukchon Hanok Village.
Do New York and Seoul have stock exchanges?
Yes. New York has the NYSE (New York Stock Exchange) and Seoul has the KRX (Korea Exchange). The +13h time difference affects trading hour overlaps between these exchanges.
Which countries use EST (Eastern Standard Time)?
EST is used in United States (Eastern), Canada (Ontario, Quebec), Mexico (Quintana Roo), Panama, Jamaica, Cayman Islands, and 6 more countries.
Does EST observe daylight saving time?
Yes, EST switches to EDT during summer months.
What are some interesting facts about EST?
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.
Which cities are in the KST timezone?
Major cities in the KST timezone include Seoul, Busan, Incheon, Daegu, Daejeon, Pyongyang.
What is the UTC offset for KST?
Korea Standard Time (KST) is at UTC+09:00.
What should I know about the KST timezone?
South Korea does not observe daylight saving time. Seoul is home to Samsung, LG, and Hyundai headquarters.
When is it midnight in New York, what time is it in Seoul?
When it is 12:00 AM (midnight) in New York (EST), it is +13h later in Seoul (KST).
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