EST to Seoul
+14hEST
ESTSOURCESeoul
KSTGreen rows indicate typical business hours (9 AM - 5 PM)
EST and KST on the World Map
The map below highlights the EST (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 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 +14h Gap: EST vs Seoul
EST runs on Eastern Standard Time (EST) at UTC-05:00. Seoul runs on Korean Standard Time (KST) at UTC+09:00. That puts EST 14 hours ahead of Seoul — a difference of +14h at the current offsets.
In practice, when it is 9:00 AM in EST it is 11:00 PM in Seoul. Midnight in EST is 2:00 PM in Seoul. Neither zone observes daylight saving time, so the offset between them stays constant all year.
EST to Seoul time conversion table
| EST (EST) | Seoul (KST) | Day |
|---|---|---|
| 12:00 AM | 2:00 PM | same day |
| 6:00 AM | 8:00 PM | same day |
| 7:00 AM | 9:00 PM | same day |
| 8:00 AM | 10:00 PM | same day |
| 9:00 AM | 11:00 PM | same day |
| 12:00 PM | 2:00 AM | next day |
| 3:00 PM | 5:00 AM | next day |
| 5:00 PM | 7:00 AM | next day |
| 6:00 PM | 8:00 AM | next day |
| 9:00 PM | 11:00 AM | next day |
Why people convert EST to Seoul time
- Scheduling a call from EST to Seoul: a 10:00 AM start in EST lands at 12:00 AM in Seoul the next day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +14h gap: EST 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 11:00 PM in EST.
- Keeping family and friends in sync: knowing that 8:00 PM in EST is 10:00 AM in Seoul makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM EST" is unambiguous; "3 PM" across a +14h gap is not.
- With a +14h gap there is no shared 9-to-5 window, so alternate the early start: one week EST takes the early slot, the next week Seoul does.
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 EST and Seoul
With a +14h offset there is no overlap inside a normal 9 AM – 5 PM day. Seoul opens at 9:00 AM KST, which is 11:00 PM in EST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
EST and Seoul have no shared working hours because of the +14h gap. Teams need to alternate early starts or rely on asynchronous handovers.
EST is 14 hours ahead of Seoul (EST UTC-05:00 → 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
EST
☀ 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 EST and Seoul?
EST (EST, UTC-05:00) is 14 hours ahead of Seoul (KST, UTC+09:00). The gap is currently +14h.
How do I convert EST time to Seoul time?
Add +14h to EST local time. For example, 9:00 AM in EST is 11:00 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 +14h offset from EST.
What is the best time to call Seoul from EST?
There is no shared working-hours window because of the +14h gap. The closest option is 1:00 PM in EST, which is 3:00 AM in Seoul.
Which is ahead, EST or Seoul?
EST is 14 hours ahead of Seoul. When it is 12:00 PM in EST it is 2:00 AM in Seoul.
Do EST and Seoul use different time zones?
EST uses EST at UTC-05:00, 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 EST–Seoul difference?
Neither zone observes daylight saving time, so the +14h offset between EST and Seoul is fixed all year.
Which other cities share EST's time zone?
EST also covers New York City, Washington D.C., Miami, Toronto, Philadelphia, Atlanta, Boston, Montreal and 8 more.
Which countries use EST, EST's zone?
EST 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 EST and Seoul?
Sometimes. The +14h gap is large enough that 8:00 PM or later in EST already falls on the next day in Seoul.
What is the time difference between EST and Seoul?
Seoul is +14h from EST.
What timezone is EST in?
EST operates on its local timezone.
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 Seoul?
Standard business hours in Seoul are 9:00 AM - 6:00 PM KST.
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 EST, what time is it in Seoul?
When it is 12:00 AM (midnight) in EST (EST), it is +14h later in Seoul (KST).
Related Developer Tools
Explore more tools that work great with timezone conversions for international teams:
Related Timezone Conversions
More EST time conversions
- est to new york
- est to edt
- est to london
- est to dubai
- est to tokyo
- est to singapore
- est to sydney
- est to los angeles
- est to paris
- est to delhi
- est to mumbai
- est to berlin
- est to hong kong
- est to toronto
- est to kathmandu
- new york to est
- london to est
- dubai to est
- tokyo to est
- singapore to est
- sydney to est
- los angeles to est
- paris to est
- delhi to est
- mumbai to est
- berlin to est
- hong kong to est
- toronto to est
- kathmandu to est
See every conversion from EST →·See every conversion from Seoul →