South Korea to GST
-5hSouth Korea
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.
Understanding the -5h Gap: South Korea vs GST
South Korea runs on Korean Standard Time (KST) at UTC+09:00. GST runs on Gulf Standard Time (GST) at UTC+04:00. That puts South Korea 5 hours behind GST — a difference of -5h at the current offsets.
In practice, when it is 9:00 AM in South Korea it is 4:00 AM in GST. Midnight in South Korea is 7:00 PM in GST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
South Korea to GST time conversion table
| South Korea (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 South Korea to GST time
- Scheduling a call from South Korea to GST: a 10:00 AM start in South Korea lands at 5:00 AM in GST, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both South Korea 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.
- Booking travel or deliveries: tracking GST local time against South Korea keeps pickup windows and arrival estimates honest across the -5h offset.
- 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 South Korea 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 South Korea and GST
Both South Korea 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
South Korea and GST overlap for about 3 hours during the working day — enough for meetings if you avoid the edges of the window.
South Korea 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 South Korea and GST?
South Korea (KST, UTC+09:00) is 5 hours behind GST (GST, UTC+04:00). The gap is currently -5h.
How do I convert South Korea time to GST time?
Add -5h to South Korea local time. For example, 9:00 AM in South Korea 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 South Korea.
What is the best time to call GST from South Korea?
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, South Korea or GST?
South Korea is 5 hours behind GST. When it is 12:00 PM in South Korea it is 7:00 AM in GST.
Do South Korea and GST use different time zones?
South Korea (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 South Korea–GST difference?
Neither zone observes daylight saving time, so the -5h offset between South Korea and GST is fixed all year.
Which other cities share South Korea's time zone?
KST also covers Seoul, Busan, Incheon, Daegu, Daejeon, Pyongyang.
Which countries use KST, South Korea's zone?
KST is used in South Korea, North Korea.
Is there a day difference between South Korea and GST?
Not normally. The -5h gap only pushes the date over the previous day.
What is the time difference between South Korea and GST?
GST is -5h from South Korea.
What timezone is South Korea in?
South Korea operates on its local timezone.
What timezone is GST in?
GST 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 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 South Korea, what time is it in GST?
When it is 12:00 AM (midnight) in South Korea (KST), it is -5h later in GST (GST).
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