The short answer

Korea Standard Time is 16 hours ahead of Pacific Daylight Time.

Korea Standard Time
8:21:43pm
KST · UTC+09:00 · Wed, Jul 22
Pacific Daylight Time
4:21:43am
PDT · UTC-07:00 · Wed, Jul 22
Read across to convert
Korea Standard Time
KST · UTC+09:00
8:21pm ☾
Pacific Daylight Time
PDT · UTC-07:00
4:21am ☾
Click any row to pin that hour across both zones.
12amWed
8amTue ·−1d
1am
9amTue ·−1d
WORK
2am
10amTue ·−1d
WORK
3am
11amTue ·−1d
WORK
4am
12pmTue ·−1d
WORK
5am
1pmTue ·−1d
WORK
6am
2pmTue ·−1d
WORK
7am
3pmTue ·−1d
WORK
8am
4pmTue ·−1d
WORK
9am
WORK
5pmTue ·−1d
10am
WORK
6pmTue ·−1d
11am
WORK
7pmTue ·−1d
12pm
WORK
8pmTue ·−1d
1pm
WORK
9pmTue ·−1d
2pm
WORK
10pmTue ·−1d
3pm
WORK
11pmTue ·−1d
4pm
WORK
12amWed
5pm
1am
6pm
2am
7pm
3am
NOW
8pm
4am
9pm
5am
10pm
6am
11pm
7am
daylightnightworking hoursoverlap
Best time to meet
Closest workable window
Just outside the working window — early on one side, late on the other.
Korea Standard Time
7am–11am
=
Pacific Daylight Time
3pm–7pm
previous day
Popular conversions

Quick reference.

9amKorea Standard Time=5pmPacific Daylight Time · prev day
12pmKorea Standard Time=8pmPacific Daylight Time · prev day
3pmKorea Standard Time=11pmPacific Daylight Time · prev day
5pmKorea Standard Time=1amPacific Daylight Time
9pmKorea Standard Time=5amPacific Daylight Time
In context

What each side covers.

Korea Standard Time
KST · UTC+09:00
8:21pm
Cities on this clock
Pacific Daylight Time
PDT · UTC-07:00
4:21am

Frequently asked

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

What is the time difference between Korea Standard Time and Pacific Daylight Time?
Korea Standard Time is 16 hours ahead of Pacific Daylight 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 9am in Korea Standard Time, what time is it in Pacific Daylight Time?
9am in Korea Standard Time is 5pm in Pacific Daylight Time on the previous day. Use the hour-by-hour table above to read any other time across — find the row and read the matching cell in the other column.
What's the best time for a call between Korea Standard Time and Pacific Daylight Time?
There's no comfortable 9-to-5 overlap between Korea Standard Time and Pacific Daylight 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 PDT — 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.