Offset
The time difference between Eastern Time and Korea Standard Time is 13 hours.
Eastern Time (EDT) is behind Korea Standard Time (KST).
EDT: UTC-4
KST: UTC+9
Eastern Time is currently observing daylight saving time; Korea Standard Time is not.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Eastern Time and Korea Standard Time don't overlap on the same weekday. Korea Standard Time is 13 hours ahead of Eastern Time.
With some flexibility, there’s a workable window outside standard hours:
- 6 PM–8 PM in Eastern Time (7 AM–9 AM the next day in Korea Standard Time) — suggest 7:00 PM Eastern Time (8:00 AM Korea Standard Time).
This means an early start or late finish for one side, but it’s a reasonable slot for a one-off meeting.
This window may shift by an hour during daylight saving time.
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
United States
- New Year's DayThu, Jan 1
- Martin Luther King, Jr. DayMon, Jan 19
- Presidents DayMon, Feb 16
- Memorial DayMon, May 25
- Juneteenth National Independence DayFri, Jun 19
- Independence DayFri, Jul 3
- Labour DayMon, Sep 7
- Columbus DayMon, Oct 12
- Veterans DayWed, Nov 11
- Thanksgiving DayThu, Nov 26
- Christmas DayFri, Dec 25
South Korea
- New Year's DayThu, Jan 1
- Lunar New YearMon, Feb 16
- Lunar New YearTue, Feb 17
- Lunar New YearWed, Feb 18
- Independence Movement DayMon, Mar 2
- Labour DayFri, May 1
- Children's DayTue, May 5
- Buddha's BirthdayMon, May 25
- Local Election DayWed, Jun 3
- Memorial DaySat, Jun 6
- Constitution DayFri, Jul 17
- Liberation DayMon, Aug 17
- ChuseokThu, Sep 24
- ChuseokFri, Sep 25
- ChuseokSat, Sep 26
- National Foundation DayMon, Oct 5
- Hangul DayFri, Oct 9
- Christmas DayFri, Dec 25
About these zones
Eastern Time is also known as EST, or EDT. To call United States, dial +1.
Korea Standard Time is also known as KST. To call South Korea, dial +82.
Korea Standard Time is approximately 6,850 miles north of Eastern Time.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| EST | KST | Day |
|---|---|---|
| 12:00 am | 1:00 pm | Same day |
| 1:00 am | 2:00 pm | Same day |
| 2:00 am | 3:00 pm | Same day |
| 3:00 am | 4:00 pm | Same day |
| 4:00 am | 5:00 pm | Same day |
| 5:00 am | 6:00 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 |
| 10:00 am | 11:00 pm | Same day |
| 11:00 am | 12:00 am | +1 day |
| 12:00 pm | 1:00 am | +1 day |
| 1:00 pm | 2:00 am | +1 day |
| 2:00 pm | 3:00 am | +1 day |
| 3:00 pm | 4:00 am | +1 day |
| 4:00 pm | 5:00 am | +1 day |
| 5:00 pm | 6:00 am | +1 day |
| 6:00 pm | 7:00 am | +1 day |
| 7:00 pm | 8:00 am | +1 day |
| 8:00 pm | 9:00 am | +1 day |
| 9:00 pm | 10:00 am | +1 day |
| 10:00 pm | 11:00 am | +1 day |
| 11:00 pm | 12:00 pm | +1 day |
Daylight saving time
Eastern Time observes daylight saving time; Korea Standard Time does not. The offset between the two zones changes when Eastern Time transitions: on Sunday, November 1, 2026, clocks fall back from EDT to EST.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 5:27 AM
- Sunset
- 8:24 PM
- Day length
- 14h 58m
- Sunrise
- 5:12 AM
- Sunset
- 7:51 PM
- Day length
- 14h 38m
Daylight overlap: 1h 24m — 5:27 AM–6:51 AM in Eastern Time (6:27 PM–7:51 PM in Korea Standard Time). Both locations are in daylight during this window.
Cities in these zones
Cities in Eastern Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Eastern Time
- EWR
- HPN
- JFK
- LGA
- TEB
- ILG
- PHL
- TTN
- CLT
- USA
Airports in Korea Standard Time
- GMP
- ICN
- PUS
- TAE
- CJJ
- KWJ
- MWX
Related conversions
Common conversions
- What is 9:00 am EST in KST?
- 9:00 am EST is 10:00 pm KST.
- What is 12:00 pm EST in KST?
- 12:00 pm EST is 1:00 am KST, the next day.
- What is 12:30 pm EST in KST?
- 12:30 pm EST is 1:30 am KST, the next day.
- What is 2:00 pm EST in KST?
- 2:00 pm EST is 3:00 am KST, the next day.
- What is 5:00 pm EST in KST?
- 5:00 pm EST is 6:00 am KST, the next day.
- What is 11:30 pm EST in KST?
- 11:30 pm EST is 12:30 pm KST, the next day.