Seoul to GST
-5hSeoul
KSTSOURCEGST
GSTGreen rows indicate typical business hours (9 AM - 5 PM)
KST and GST on the World Map
The map below highlights the KST (Korea Standard Time) and GST (Gulf 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).
GST – Gulf Standard Time
UTC+04:00Gulf Standard Time (GST) is used in the UAE, Oman, and other Gulf states, 4 hours ahead of UTC.
- •Dubai uses GST year-round with no daylight saving time.
- •GST is 9 hours ahead of EST and 4 hours ahead of GMT.
- •The Dubai Financial Market (DFM) operates on GST.
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.
Time Conversion Guide: Seoul to GST
Seoul runs on Korean Standard Time (KST) at UTC+09:00. GST runs on Gulf Standard Time (GST) at UTC+04:00. That puts Seoul 5 hours behind GST — a difference of -5h at the current offsets.
In practice, when it is 9:00 AM in Seoul it is 4:00 AM in GST. Midnight in Seoul is 7:00 PM in GST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Seoul to GST time conversion table
| Seoul (KST) | GST (GST) | Day |
|---|---|---|
| 12:00 AM | 7:00 PM | previous day |
| 6:00 AM | 1:00 AM | same day |
| 7:00 AM | 2:00 AM | same day |
| 8:00 AM | 3:00 AM | same day |
| 9:00 AM | 4:00 AM | same day |
| 12:00 PM | 7:00 AM | same day |
| 3:00 PM | 10:00 AM | same day |
| 5:00 PM | 12:00 PM | same day |
| 6:00 PM | 1:00 PM | same day |
| 9:00 PM | 4:00 PM | same day |
Why people convert Seoul to GST time
- Scheduling a call from Seoul to GST: a 10:00 AM start in Seoul lands at 5:00 AM in GST, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Seoul and GST are inside the 9-to-5 working day between 2:00 PM and 5:00 PM KST time (9:00 AM–12:00 PM GST). That is roughly 3 hours of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in Seoul is 3:00 PM in GST makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM KST" is unambiguous; "3 PM" across a -5h gap is not.
- Block 2:00 PM–5:00 PM KST as the recurring meeting window if you work primarily from Seoul and need GST colleagues present.
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 GST (Gulf Standard Time)
Gulf Standard Time (GST) is the time zone used in the United Arab Emirates, Oman, and other Gulf states. GST does not observe daylight saving time. Dubai and Abu Dhabi, major international business and tourism hubs, operate on GST.
Best time to call between Seoul and GST
Both Seoul and GST sit inside the 9 AM – 5 PM working day between 2:00 PM–5:00 PM KST, which is 9:00 AM–12:00 PM GST. That gives roughly 3 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
Seoul and GST overlap for about 3 hours during the working day — enough for meetings if you avoid the edges of the window.
Seoul is 5 hours behind GST (KST UTC+09:00 → GST UTC+04:00). The shared working window is 2:00 PM–5:00 PM KST. Remember to re-check around daylight-saving transitions.
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 GST?
Seoul (KST, UTC+09:00) is 5 hours behind GST (GST, UTC+04:00). The gap is currently -5h.
How do I convert Seoul time to GST time?
Add -5h to Seoul local time. For example, 9:00 AM in Seoul is 4:00 AM in GST.
What time is it in GST right now?
GST uses GST at UTC+04:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -5h offset from Seoul.
What is the best time to call GST from Seoul?
Call between 2:00 PM and 5:00 PM KST — that maps to 9:00 AM–12:00 PM GST and keeps both parties inside the working day.
Which is behind, Seoul or GST?
Seoul is 5 hours behind GST. When it is 12:00 PM in Seoul it is 7:00 AM in GST.
Do Seoul and GST use different time zones?
Seoul (South Korea) uses KST at UTC+09:00, while GST uses GST at UTC+04:00. The IANA identifiers are Asia/Seoul and Asia/Dubai.
Does daylight saving time affect the Seoul–GST difference?
Neither zone observes daylight saving time, so the -5h offset between Seoul and GST 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 GST?
Not normally. The -5h gap only pushes the date over the previous day.
What is the time difference between Seoul and GST?
GST is -5h 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 GST in?
GST 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 GST timezone?
Major cities in the GST timezone include Dubai, Abu Dhabi, Muscat, Baku, Tbilisi.
What is the UTC offset for GST?
Gulf Standard Time (GST) is at UTC+04:00.
What should I know about the GST timezone?
Dubai uses GST year-round with no daylight saving time. GST is 9 hours ahead of EST and 4 hours ahead of GMT.
When is it midnight in Seoul, what time is it in GST?
When it is 12:00 AM (midnight) in Seoul (KST), it is -5h later in GST (GST).
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