Seoul to PST
-17hSeoul
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.
About Seoul
WikipediaSeoul operates on Korea Standard Time (KST), UTC+9, same as Japan. As a global tech and entertainment hub, Seoul coordinates with East Asian markets.
Seoul has the fastest average internet speed in the world.
Everything You Need to Know About Seoul and PST Time
Seoul runs on Korean Standard Time (KST) at UTC+09:00. PST runs on Pacific Standard Time (PST) at UTC-08:00. That puts Seoul 17 hours behind PST — a difference of -17h at the current offsets.
In practice, when it is 9:00 AM in Seoul it is 4:00 PM in PST on the previous day. Midnight in Seoul is 7:00 AM in PST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Seoul to PST time conversion table
| Seoul (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 Seoul to PST time
- Scheduling a call from Seoul to PST: a 10:00 AM start in Seoul 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: Seoul 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 Seoul.
- Watching a live event or market open: Seoul viewers need 4:00 PM in PST to catch a 9:00 AM start there, and 5:00 PM if the event is anchored to Seoul.
- 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 Seoul 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 Seoul 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 Seoul, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Seoul and PST have no shared working hours because of the -17h gap. Teams need to alternate early starts or rely on asynchronous handovers.
Seoul 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
Seoul
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 Seoul and PST?
Seoul (KST, UTC+09:00) is 17 hours behind PST (PST, UTC-08:00). The gap is currently -17h.
How do I convert Seoul time to PST time?
Add -17h to Seoul local time. For example, 9:00 AM in Seoul 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 Seoul.
What is the best time to call PST from Seoul?
There is no shared working-hours window because of the -17h gap. The closest option is 1:00 PM in Seoul, which is 8:00 PM in PST.
Which is behind, Seoul or PST?
Seoul is 17 hours behind PST. When it is 12:00 PM in Seoul it is 7:00 PM in PST.
Do Seoul and PST use different time zones?
Seoul (South Korea) uses KST at UTC+09:00, while PST uses PST at UTC-08:00. The IANA identifiers are Asia/Seoul and America/Los_Angeles.
Does daylight saving time affect the Seoul–PST difference?
Neither zone observes daylight saving time, so the -17h offset between Seoul and PST is fixed all year.
Which other cities share Seoul's time zone?
KST also covers Seoul, Busan, Incheon, Daegu, Daejeon, Pyongyang.
Which countries use KST, Seoul's zone?
KST is used in South Korea, North Korea.
Is there a day difference between Seoul and PST?
Sometimes. The -17h gap is large enough that 8:00 PM or later in Seoul already falls on the in PST.
What is the time difference between Seoul and PST?
PST is -17h from Seoul.
What timezone is Seoul in?
Seoul operates on Korea Standard Time (KST), UTC+9, same as Japan. As a global tech and entertainment hub, Seoul coordinates with East Asian markets.
What timezone is PST in?
PST operates on its local timezone.
What are the business hours in Seoul?
Standard business hours in Seoul are 9:00 AM - 6:00 PM KST.
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 Seoul, what time is it in PST?
When it is 12:00 AM (midnight) in Seoul (KST), it is -17h later in PST (PST).
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