KST to PST
-17hKST
KSTSOURCEPST
PSTGreen rows indicate typical business hours (9 AM - 5 PM)
KST and PST on the World Map
The map below highlights the KST (Korea Standard Time) and PST (Pacific Standard Time) timezone regions across the globe.
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).
PST – Pacific Standard Time
UTC-08:00Pacific Standard Time (PST) is the time zone for the US and Canadian Pacific coast, 8 hours behind UTC.
- •Silicon Valley and the world's biggest tech companies operate on Pacific Time.
- •The Hollywood film industry runs on PST/PDT.
- •PST is 3 hours behind EST, creating a significant business hours gap.
- •Vancouver, Canada's third-largest city, uses PST.
KST to PST Time Difference – Complete Guide
KST runs on Korea Standard Time (KST) at UTC+09:00. PST runs on Pacific Standard Time (PST) at UTC-08:00. That puts KST 17 hours behind PST — a difference of -17h at the current offsets.
In practice, when it is 9:00 AM in KST it is 4:00 PM in PST on the previous day. Midnight in KST is 7:00 AM in PST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
KST to PST time conversion table
| KST (KST) | PST (PST) | Day |
|---|---|---|
| 12:00 AM | 7:00 AM | previous day |
| 6:00 AM | 1:00 PM | previous day |
| 7:00 AM | 2:00 PM | previous day |
| 8:00 AM | 3:00 PM | previous day |
| 9:00 AM | 4:00 PM | previous day |
| 12:00 PM | 7:00 PM | previous day |
| 3:00 PM | 10:00 PM | previous day |
| 5:00 PM | 12:00 AM | same day |
| 6:00 PM | 1:00 AM | same day |
| 9:00 PM | 4:00 AM | same day |
Why people convert KST to PST time
- Scheduling a call from KST to PST: a 10:00 AM start in KST lands at 5:00 PM in PST the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -17h gap: KST and PST 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 PST is 4:00 PM in KST.
- Coordinating a KST-based team with PST contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.
- Always state the zone abbreviation, not just the hour. "3:00 PM KST" is unambiguous; "3 PM" across a -17h gap is not.
- With a -17h gap there is no shared 9-to-5 window, so alternate the early start: one week KST takes the early slot, the next week PST does.
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.
About PST (Pacific Standard Time)
Pacific Standard Time (PST) covers the west coast of North America, including tech hubs like San Francisco and Seattle, and entertainment capital Los Angeles. The Pacific Time Zone is home to Silicon Valley and the world's largest technology companies. During summer, clocks advance to Pacific Daylight Time (PDT, UTC-07:00). PST is also observed in Baja California, Mexico.
Best time to call between KST and PST
With a -17h offset there is no overlap inside a normal 9 AM – 5 PM day. PST opens at 9:00 AM PST, which is 4:00 PM in KST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
KST and PST have no shared working hours because of the -17h gap. Teams need to alternate early starts or rely on asynchronous handovers.
KST is 17 hours behind PST (KST UTC+09:00 → PST UTC-08:00). 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
KST
Does not observe DST
PST
☀ Currently in DST
Standard: UTC-08:00 · DST: UTC-07:00
Clocks fall back on Sun, Nov 1, 2026
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 KST and PST?
KST (KST, UTC+09:00) is 17 hours behind PST (PST, UTC-08:00). The gap is currently -17h.
How do I convert KST time to PST time?
Add -17h to KST local time. For example, 9:00 AM in KST is 4:00 PM in PST (previous day).
What time is it in PST right now?
PST uses PST at UTC-08:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -17h offset from KST.
What is the best time to call PST from KST?
There is no shared working-hours window because of the -17h gap. The closest option is 1:00 PM in KST, which is 8:00 PM in PST.
Which is behind, KST or PST?
KST is 17 hours behind PST. When it is 12:00 PM in KST it is 7:00 PM in PST.
Does daylight saving time affect the KST–PST difference?
Neither zone observes daylight saving time, so the -17h offset between KST and PST is fixed all year.
Which other cities share KST's time zone?
KST also covers Seoul, Busan, Incheon, Daegu, Daejeon, Pyongyang.
Which countries use KST, KST's zone?
KST is used in South Korea, North Korea.
Is there a day difference between KST and PST?
Sometimes. The -17h gap is large enough that 8:00 PM or later in KST already falls on the in PST.
What is the time difference between KST and PST?
PST is -17h from KST.
What timezone is KST in?
KST operates on its local timezone.
What timezone is PST in?
PST operates on its local timezone.
Which countries use KST (Korea Standard Time)?
KST is used in South Korea, North Korea.
Does KST observe daylight saving time?
No, KST does not observe daylight saving time and remains at UTC+09:00 year-round.
What are some interesting facts about KST?
South Korea does not observe daylight saving time. Seoul is home to Samsung, LG, and Hyundai headquarters.
Which cities are in the PST timezone?
Major cities in the PST timezone include Los Angeles, San Francisco, Seattle, Vancouver, San Diego, Portland, Las Vegas, Sacramento.
What is the UTC offset for PST?
Pacific Standard Time (PST) is at UTC-08:00. During daylight saving time, it shifts to PDT.
What should I know about the PST timezone?
Silicon Valley and the world's biggest tech companies operate on Pacific Time. The Hollywood film industry runs on PST/PDT.
When is it midnight in KST, what time is it in PST?
When it is 12:00 AM (midnight) in KST (KST), it is -17h later in PST (PST).
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