Istanbul to Seoul
+6hIstanbul
TRTSOURCESeoul
KSTGreen rows indicate typical business hours (9 AM - 5 PM)
TRT and KST on the World Map
The map below highlights the TRT (Turkey Time) and KST (Korea Standard Time) timezone regions across the globe.
TRT – Turkey Time
UTC+03:00Turkey Time (TRT, UTC+03:00) is the single time zone used across Turkey, fixed year round since 2016.
- •Turkey has used a permanent UTC+03:00 since September 2016.
- •TRT is level with Moscow Standard Time and Arabia Standard Time all year.
- •Because Turkey kept summer time permanently, western cities see very late winter sunrises.
- •Turkey previously observed daylight saving time from 1973 to 2016.
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).
About Istanbul
WikipediaIstanbul operates on Turkey Time (TRT), UTC+3 year-round. As a transcontinental city, Istanbul bridges European and Asian business hours.
The Grand Bazaar is one of the world's oldest and largest covered markets with 4,000+ shops.
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: Istanbul to Seoul
Istanbul runs on Türkiye Standard Time (TRT) at UTC+03:00. Seoul runs on Korean Standard Time (KST) at UTC+09:00. That puts Istanbul 6 hours ahead of Seoul — a difference of +6h at the current offsets.
In practice, when it is 9:00 AM in Istanbul it is 3:00 PM in Seoul. Midnight in Istanbul is 6:00 AM in Seoul. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Istanbul to Seoul time conversion table
| Istanbul (TRT) | Seoul (KST) | Day |
|---|---|---|
| 12:00 AM | 6:00 AM | same day |
| 6:00 AM | 12:00 PM | same day |
| 7:00 AM | 1:00 PM | same day |
| 8:00 AM | 2:00 PM | same day |
| 9:00 AM | 3:00 PM | same day |
| 12:00 PM | 6:00 PM | same day |
| 3:00 PM | 9:00 PM | same day |
| 5:00 PM | 11:00 PM | same day |
| 6:00 PM | 12:00 AM | next day |
| 9:00 PM | 3:00 AM | next day |
Why people convert Istanbul to Seoul time
- Scheduling a call from Istanbul to Seoul: a 10:00 AM start in Istanbul lands at 4:00 PM in Seoul, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Istanbul and Seoul are inside the 9-to-5 working day between 9:00 AM and 11:00 AM TRT time (3:00 PM–5:00 PM KST). That is roughly 2 hours of usable overlap.
- Coordinating a Istanbul-based team with Seoul 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 TRT" is unambiguous; "3 PM" across a +6h gap is not.
- Block 9:00 AM–11:00 AM TRT as the recurring meeting window if you work primarily from Istanbul and need Seoul colleagues present.
About TRT (Turkey Time)
Turkey Time (TRT) is fixed at UTC+03:00 all year. Turkey abolished seasonal clock changes in September 2016, moving to a permanent UTC+03:00 so the whole country stays on what was formerly summer time. That leaves Istanbul, which sits close to 29°E, on an offset well ahead of its solar time — sunrise in mid-winter comes after 08:30 local. TRT shares its offset with Moscow Standard Time, Arabia Standard Time and East Africa Time, so Istanbul is level with Moscow and Riyadh all year and one hour ahead of Central European Time during the European winter.
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.
Best time to call between Istanbul and Seoul
Both Istanbul and Seoul sit inside the 9 AM – 5 PM working day between 9:00 AM–11:00 AM TRT, which is 3:00 PM–5:00 PM KST. That gives roughly 2 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
Istanbul and Seoul overlap for about 2 hours during the working day — enough for meetings if you avoid the edges of the window.
Istanbul is 6 hours ahead of Seoul (TRT UTC+03:00 → KST UTC+09:00). The shared working window is 9:00 AM–11:00 AM TRT. 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 Istanbul and Seoul?
Istanbul (TRT, UTC+03:00) is 6 hours ahead of Seoul (KST, UTC+09:00). The gap is currently +6h.
How do I convert Istanbul time to Seoul time?
Add +6h to Istanbul local time. For example, 9:00 AM in Istanbul is 3:00 PM in Seoul.
What time is it in Seoul right now?
Seoul uses KST at UTC+09:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +6h offset from Istanbul.
What is the best time to call Seoul from Istanbul?
Call between 9:00 AM and 11:00 AM TRT — that maps to 3:00 PM–5:00 PM KST and keeps both parties inside the working day.
Which is ahead, Istanbul or Seoul?
Istanbul is 6 hours ahead of Seoul. When it is 12:00 PM in Istanbul it is 6:00 PM in Seoul.
Do Istanbul and Seoul use different time zones?
Istanbul (Turkey) uses TRT at UTC+03:00, while Seoul (South Korea) uses KST at UTC+09:00. The IANA identifiers are Europe/Istanbul and Asia/Seoul.
Does daylight saving time affect the Istanbul–Seoul difference?
Neither zone observes daylight saving time, so the +6h offset between Istanbul and Seoul is fixed all year.
Which other cities share Istanbul's time zone?
TRT also covers Istanbul, Ankara, Izmir, Bursa, Antalya.
Which countries use TRT, Istanbul's zone?
TRT is used in Turkey.
Is there a day difference between Istanbul and Seoul?
Not normally. The +6h gap only pushes the date over for late-evening times.
What is the time difference between Istanbul and Seoul?
Seoul is +6h from Istanbul.
What timezone is Istanbul in?
Istanbul operates on Turkey Time (TRT), UTC+3 year-round. As a transcontinental city, Istanbul bridges European and Asian business hours.
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 are the business hours in Istanbul?
Standard business hours in Istanbul are 9:00 AM - 6:00 PM TRT.
What are the business hours in Seoul?
Standard business hours in Seoul are 9:00 AM - 6:00 PM KST.
What is the best time to schedule a call between Istanbul and Seoul?
The best overlap for a call is when both cities are in business hours. Istanbul works 9:00 AM - 6:00 PM TRT and Seoul works 9:00 AM - 6:00 PM KST (+6h difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Istanbul and Seoul?
Istanbul uses TRY (₺) while Seoul uses KRW (₩). Check current exchange rates when planning travel or business between these cities.
How do Istanbul and Seoul compare in size?
Istanbul has a population of approximately 15.5 million (metro: 15.8 million), while Seoul has approximately 9.7 million (metro: 25.5 million).
What are the major landmarks in Istanbul and Seoul?
Istanbul is known for Hagia Sophia, Blue Mosque, Topkapi Palace. Seoul is famous for Gyeongbokgung Palace, N Seoul Tower, Bukchon Hanok Village.
Do Istanbul and Seoul have stock exchanges?
Yes. Istanbul has the Borsa Istanbul and Seoul has the KRX (Korea Exchange). The +6h time difference affects trading hour overlaps between these exchanges.
Which countries use TRT (Turkey Time)?
TRT is used in Turkey.
Does TRT observe daylight saving time?
No, TRT does not observe daylight saving time and remains at UTC+03:00 year-round.
What are some interesting facts about TRT?
Turkey has used a permanent UTC+03:00 since September 2016. TRT is level with Moscow Standard Time and Arabia Standard Time all year.
Which cities are in the KST timezone?
Major cities in the KST timezone include Seoul, Busan, Incheon, Daegu, Daejeon, Pyongyang.
What is the UTC offset for KST?
Korea Standard Time (KST) is at UTC+09:00.
What should I know about the KST timezone?
South Korea does not observe daylight saving time. Seoul is home to Samsung, LG, and Hyundai headquarters.
When is it midnight in Istanbul, what time is it in Seoul?
When it is 12:00 AM (midnight) in Istanbul (TRT), it is +6h later in Seoul (KST).
Related Developer Tools
Explore more tools that work great with timezone conversions for international teams:
Related Timezone Conversions
More Istanbul time conversions
- istanbul to trt
- istanbul to turkey
- istanbul to london
- istanbul to dublin
- istanbul to paris
- istanbul to berlin
- istanbul to amsterdam
- istanbul to madrid
- istanbul to rome
- istanbul to zurich
- istanbul to stockholm
- istanbul to moscow
- istanbul to lisbon
- istanbul to warsaw
- istanbul to new york
- istanbul to dubai
- istanbul to tokyo
- istanbul to singapore
- istanbul to sydney
- istanbul to los angeles
- istanbul to delhi
- istanbul to mumbai
- istanbul to hong kong
- istanbul to toronto
- istanbul to kathmandu
- new york to istanbul
- london to istanbul
- dubai to istanbul
- tokyo to istanbul
- singapore to istanbul
- sydney to istanbul
- los angeles to istanbul
- paris to istanbul
- delhi to istanbul
- mumbai to istanbul
- berlin to istanbul
See every conversion from Istanbul →·See every conversion from Seoul →