The short answer
4am in Korea Standard Time is 8pm in Irish Standard Time on the previous day.
Korea Standard Time is 8 hours ahead of Irish Standard Time. That's already evening in Irish Standard Time, after the typical working day ends.
Korea Standard Time☾
4am
Irish Standard Time☀
8pm
previous day
Right now
1:08pmKST · UTC+09:00 · Tue, Jun 23
5:08amIST · UTC+01:00 · Tue, Jun 23
Read across to convert
Korea Standard Time
KST · UTC+09:00
Irish Standard Time
IST · UTC+01:00
Pinned4amKorea Standard Time=8pmIrish Standard Time · Mon (previous day)
12amTue
4pmMon ·−1d
WORK1am
5pmMon ·−1d
2am
6pmMon ·−1d
3am
7pmMon ·−1d
PINNED
4am
8pmMon ·−1d
5am
9pmMon ·−1d
6am
10pmMon ·−1d
7am
11pmMon ·−1d
8am
12amTue
9am
WORK1am
10am
WORK2am
11am
WORK3am
12pm
WORK4am
NOW
1pm
WORK5am
2pm
WORK6am
3pm
WORK7am
4pm
WORK8am
5pm
9am
WORK6pm
10am
WORK7pm
11am
WORK8pm
12pm
WORK9pm
1pm
WORK10pm
2pm
WORK11pm
3pm
WORKdaylightnightworking hoursoverlap
Best time to meet=
Closest workable window
Just outside the working window — early on one side, late on the other.
Korea Standard Time
3pm–7pm
Irish Standard Time
7am–11am
Popular conversions
Quick reference.
9amKorea Standard Time=1amIrish Standard Time
12pmKorea Standard Time=4amIrish Standard Time
3pmKorea Standard Time=7amIrish Standard Time
5pmKorea Standard Time=9amIrish Standard Time
9pmKorea Standard Time=1pmIrish Standard Time
In context
What each side covers.
Korea Standard Time
1:08pmKST · UTC+09:00
Irish Standard Time
5:08amIST · UTC+01:00
Cities on this clock
Related converters
Other popular pairs.
Pacific Time
9:08pm
India Standard Time
9:38am
Pacific Time to India12 hours 30 minutes behind
Eastern Standard Time
12:08am
Central European Time
6:08am
Eastern Time to Central Europe6 hours behind
India Standard Time
9:38am
Eastern Standard Time
12:08am
India to Eastern Time9 hours 30 minutes ahead
Greenwich Mean Time
5:08am
India Standard Time
9:38am
London to India4 hours 30 minutes behind
Pacific Standard Time
9:08pm
Eastern Standard Time
12:08am
Pacific to Eastern Time3 hours behind
Central European Time
6:08am
India Standard Time
9:38am
Central Europe to India3 hours 30 minutes behind
Frequently asked
Quick answers about converting between Korea Standard Time and Irish Standard Time. Can't find what you need? Email [email protected].
- What is the time difference between Korea Standard Time and Irish Standard Time?
- Korea Standard Time is 8 hours ahead of Irish 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 4am in Korea Standard Time, what time is it in Irish Standard Time?
- 4am in Korea Standard Time is 8pm in Irish Standard Time on the previous day. That's already evening in Irish Standard Time, after the typical working day ends. Use the hour-by-hour table above to read any other time across.
- What's the best time for a call between Korea Standard Time and Irish Standard Time?
- There's no comfortable 9-to-5 overlap between Korea Standard Time and Irish 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 — KST and IST — 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.