EDT to Seoul
+13hEDT
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 Daylight Time) and KST (Korea Standard Time) timezone regions across the globe.
EDT – Eastern Daylight Time
UTC-04:00Eastern Daylight Time (EDT) is the daylight saving time observed in the Eastern Time Zone, 4 hours behind UTC.
- •EDT is observed from the second Sunday of March to the first Sunday of November.
- •During EDT, the US East Coast is only 4 hours behind London (instead of 5).
- •Not all EST locations switch to EDT – Panama and Jamaica stay on EST year-round.
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.
Everything You Need to Know About EDT and Seoul Time
EDT runs on Eastern Daylight Time (EDT) at UTC-04:00. Seoul runs on Korean Standard Time (KST) at UTC+09:00. That puts EDT 13 hours ahead of Seoul — a difference of +13h at the current offsets.
In practice, when it is 9:00 AM in EDT it is 10:00 PM in Seoul. Midnight in EDT is 1:00 PM in Seoul. Neither zone observes daylight saving time, so the offset between them stays constant all year.
EDT to Seoul time conversion table
| EDT (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 EDT to Seoul time
- Scheduling a call from EDT to Seoul: a 10:00 AM start in EDT lands at 11:00 PM in Seoul, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +13h gap: EDT 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 EDT.
- Booking travel or deliveries: tracking Seoul local time against EDT keeps pickup windows and arrival estimates honest across the +13h offset.
- 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 EDT takes the early slot, the next week Seoul does.
About EDT (Eastern Daylight Time)
Eastern Daylight Time (EDT) is used during the summer months (second Sunday of March to the first Sunday of November) in the Eastern Time Zone. During EDT, clocks are advanced by one hour to take advantage of longer daylight hours. Not all locations in the Eastern Time Zone observe DST – Panama, Jamaica, and most of the Caribbean remain on EST year-round.
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 EDT 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 EDT, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
EDT and Seoul have no shared working hours because of the +13h gap. Teams need to alternate early starts or rely on asynchronous handovers.
EDT 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
EDT
☀ 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 EDT and Seoul?
EDT (EDT, UTC-04:00) is 13 hours ahead of Seoul (KST, UTC+09:00). The gap is currently +13h.
How do I convert EDT time to Seoul time?
Add +13h to EDT local time. For example, 9:00 AM in EDT 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 EDT.
What is the best time to call Seoul from EDT?
There is no shared working-hours window because of the +13h gap. The closest option is 1:00 PM in EDT, which is 2:00 AM in Seoul.
Which is ahead, EDT or Seoul?
EDT is 13 hours ahead of Seoul. When it is 12:00 PM in EDT it is 1:00 AM in Seoul.
Do EDT and Seoul use different time zones?
EDT 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 EDT–Seoul difference?
Neither zone observes daylight saving time, so the +13h offset between EDT and Seoul is fixed all year.
Which other cities share EDT's time zone?
EDT also covers New York City, Washington D.C., Toronto, Miami, Philadelphia, Atlanta, Boston, Montreal.
Which countries use EDT, EDT's zone?
EDT is used in United States (Eastern), Canada (Ontario, Quebec), Bahamas, Haiti, Turks and Caicos.
Is there a day difference between EDT and Seoul?
Sometimes. The +13h gap is large enough that 8:00 PM or later in EDT already falls on the next day in Seoul.
What is the time difference between EDT and Seoul?
Seoul is +13h from EDT.
What timezone is EDT in?
EDT 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 EDT (Eastern Daylight Time)?
EDT is used in United States (Eastern), Canada (Ontario, Quebec), Bahamas, Haiti, Turks and Caicos.
Does EDT observe daylight saving time?
Yes, EDT switches to EST during summer months.
What are some interesting facts about EDT?
EDT is observed from the second Sunday of March to the first Sunday of November. During EDT, the US East Coast is only 4 hours behind London (instead of 5).
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 EDT, what time is it in Seoul?
When it is 12:00 AM (midnight) in EDT (EDT), it is +13h later in Seoul (KST).
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