The short answer

1am in Eastern Standard Time is 2pm in Korea Standard Time.

Eastern Standard Time is 13 hours behind Korea Standard Time. It falls outside the 9-to-5 in Eastern Standard Time but lands inside working hours in Korea Standard Time.

Eastern Standard Time
1am
Korea Standard Time
2pm
Right now
3:47amEDT · UTC-04:00 · Mon, Jun 22
4:47pmKST · UTC+09:00 · Mon, Jun 22
Read across to convert
Eastern Standard Time
EDT · UTC-04:00
3:47am ☾
Korea Standard Time
KST · UTC+09:00
4:47pm ☀
Pinned1amEastern Standard Time=2pmKorea Standard Time
12amMon
1pm
WORK
PINNED
1am
2pm
WORK
2am
3pm
WORK
NOW
3am
4pm
WORK
4am
5pm
5am
6pm
6am
7pm
7am
8pm
8am
9pm
9am
WORK
10pm
10am
WORK
11pm
11am
WORK
12amTue ·+1d
12pm
WORK
1amTue ·+1d
1pm
WORK
2amTue ·+1d
2pm
WORK
3amTue ·+1d
3pm
WORK
4amTue ·+1d
4pm
WORK
5amTue ·+1d
5pm
6amTue ·+1d
6pm
7amTue ·+1d
7pm
8amTue ·+1d
8pm
9amTue ·+1d
WORK
9pm
10amTue ·+1d
WORK
10pm
11amTue ·+1d
WORK
11pm
12pmTue ·+1d
WORK
daylightnightworking hoursoverlap
Best time to meet
Closest workable window
Just outside the working window — early on one side, late on the other.
Eastern Standard Time
6pm–7pm
=
Korea Standard Time
7am–8am
next day
Popular conversions

Quick reference.

9amEastern Standard Time=10pmKorea Standard Time
12pmEastern Standard Time=1amKorea Standard Time · next day
3pmEastern Standard Time=4amKorea Standard Time · next day
5pmEastern Standard Time=6amKorea Standard Time · next day
9pmEastern Standard Time=10amKorea Standard Time · next day
In context

What each side covers.

Eastern Standard Time
EDT · UTC-04:00
3:47am
Korea Standard Time
KST · UTC+09:00
4:47pm
Cities on this clock
Did you mean…? “EDT” is shared by several places. This page shows Eastern Standard Time (US & Canada) — or switch to Australian Eastern Standard Time.

Frequently asked

Quick answers about converting between Eastern Standard Time and Korea Standard Time. Can't find what you need? Email [email protected].

What is the time difference between Eastern Standard Time and Korea Standard Time?
Eastern Standard Time is 13 hours behind Korea Standard Time right now. We always show the live, daylight-saving-correct difference, so this figure already accounts for whichever side is observing summer time today.
When it's 1am in Eastern Standard Time, what time is it in Korea Standard Time?
1am in Eastern Standard Time is 2pm in Korea Standard Time. It falls outside the 9-to-5 in Eastern Standard Time but lands inside working hours in Korea Standard Time. Use the hour-by-hour table above to read any other time across.
What's the best time for a call between Eastern Standard Time and Korea Standard Time?
There's no comfortable 9-to-5 overlap between Eastern Standard Time and Korea Standard Time — they sit on opposite sides of the planet's working day. Plan for an early or late call on one side, or hand work off asynchronously.
Does this account for daylight saving time?
Yes. We track every clock change in both places, so the abbreviations you see — EDT and KST — are the ones actually in effect right now, not a fixed all-year value. When either side changes its clocks, this page updates automatically.
Why is the date sometimes different on each side?
When two places are far enough apart, the same moment can fall on different calendar days. That is why some conversions are marked "previous day" or "next day" — it is the same instant in time, read off two clocks that crossed midnight at different points.