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Istanbul to JST

+6h

Istanbul

TRTSOURCE
Turkey · UTC+03:00
HH12
:
MM00
  
12:00 (24-hr)
12 AM6 AM12 PM6 PM12 AM

JST

JST
UTC+09:00
HH06
:
MM00
  
18:00 (24-hr)
12 AM6 AM12 PM6 PM12 AM
Istanbul
JST
12:00 AM
6:00 AM
2:00 AM
8:00 AM
4:00 AM
10:00 AM
6:00 AM
12:00 PM
8:00 AM
2:00 PM
10:00 AM
4:00 PM
12:00 PM
6:00 PM
2:00 PM
8:00 PM
4:00 PM
10:00 PM
6:00 PM
12:00 AM+1
8:00 PM
2:00 AM+1
10:00 PM
4:00 AM+1

Green rows indicate typical business hours (9 AM - 5 PM)

TRT and JST on the World Map

The map below highlights the TRT (Turkey Time) and JST (Japan Standard Time) timezone regions across the globe.

TRTJSTIstanbulAnkaraIzmirBursaTokyoOsakaYokohamaNagoya
TRT Zone
→
JST Zone

Explore all world timezones interactively →

TRT – Turkey Time

UTC+03:00

Turkey Time (TRT, UTC+03:00) is the single time zone used across Turkey, fixed year round since 2016.

Countries in TRT
Turkey
Major Cities in TRT
IstanbulAnkaraIzmirBursaAntalya
Key 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.
  • •Because Turkey kept summer time permanently, western cities see very late winter sunrises.
  • •Turkey previously observed daylight saving time from 1973 to 2016.
Daylight Saving:No – UTC+03:00 year-round
Learn more about TRT on Wikipedia

JST – Japan Standard Time

UTC+09:00

Japan Standard Time (JST) is the time zone for Japan, 9 hours ahead of UTC.

Countries in JST
Japan
Major Cities in JST
TokyoOsakaYokohamaNagoyaSapporoKyotoKobeFukuokaHiroshima
Key Facts about JST
  • •Japan does not observe daylight saving time.
  • •Tokyo is the most populous metropolitan area in the world.
  • •The Tokyo Stock Exchange operates from 9:00 AM to 3:00 PM JST.
  • •JST is 14 hours ahead of EST and 9 hours ahead of GMT.
Daylight Saving:No – UTC+09:00 year-round
Learn more about JST on Wikipedia

About Istanbul

Wikipedia

Istanbul operates on Turkey Time (TRT), UTC+3 year-round. As a transcontinental city, Istanbul bridges European and Asian business hours.

Population:15.5 million
Metro:15.8 million
Business Hours:9:00 AM - 6:00 PM TRT
Currency:TRY (₺)
Stock Exchange:Borsa Istanbul
Key Landmarks
Hagia SophiaBlue MosqueTopkapi PalaceGrand BazaarGalata Tower
Did You Know?

The Grand Bazaar is one of the world's oldest and largest covered markets with 4,000+ shops.

Learn more about TRT timezone →

Comparing Time Zones: Istanbul and JST

Istanbul runs on Türkiye Standard Time (TRT) at UTC+03:00. JST runs on Japan Standard Time (JST) at UTC+09:00. That puts Istanbul 6 hours ahead of JST — a difference of +6h at the current offsets.

In practice, when it is 9:00 AM in Istanbul it is 3:00 PM in JST. Midnight in Istanbul is 6:00 AM in JST. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Istanbul to JST time conversion table

Istanbul (TRT)JST (JST)Day
12:00 AM6:00 AMsame day
6:00 AM12:00 PMsame day
7:00 AM1:00 PMsame day
8:00 AM2:00 PMsame day
9:00 AM3:00 PMsame day
12:00 PM6:00 PMsame day
3:00 PM9:00 PMsame day
5:00 PM11:00 PMsame day
6:00 PM12:00 AMnext day
9:00 PM3:00 AMnext day

Why people convert Istanbul to JST time

  • Scheduling a call from Istanbul to JST: a 10:00 AM start in Istanbul lands at 4:00 PM in JST, so you can confirm the slot without doing the arithmetic yourself.
  • Finding shared working hours: both Istanbul and JST are inside the 9-to-5 working day between 9:00 AM and 11:00 AM TRT time (3:00 PM–5:00 PM JST). That is roughly 2 hours of usable overlap.
  • Keeping family and friends in sync: knowing that 8:00 PM in Istanbul is 2:00 AM in JST makes it easy to avoid calling at 3 AM.
  • 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 JST 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 JST (Japan Standard Time)

Japan Standard Time (JST) is the standard time zone for all of Japan. Japan does not observe daylight saving time. JST is 9 hours ahead of UTC and 14 hours ahead of EST. The Tokyo Stock Exchange, the world's third largest by market capitalization, operates on JST. South Korea uses the same offset (KST) but it is a distinct time zone.

Best time to call between Istanbul and JST

Both Istanbul and JST 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 JST. That gives roughly 2 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

Istanbul and JST 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 JST (TRT UTC+03:00 → JST 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:

⏳
History of Timekeeping
From sundials to atomic clocks - 5000 years of measuring time
🌍
How Time Zones Work
UTC, offsets, and why zones don't follow straight lines
☀️
Daylight Saving Time
DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between Istanbul and JST?

Istanbul (TRT, UTC+03:00) is 6 hours ahead of JST (JST, UTC+09:00). The gap is currently +6h.

How do I convert Istanbul time to JST time?

Add +6h to Istanbul local time. For example, 9:00 AM in Istanbul is 3:00 PM in JST.

What time is it in JST right now?

JST uses JST 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 JST from Istanbul?

Call between 9:00 AM and 11:00 AM TRT — that maps to 3:00 PM–5:00 PM JST and keeps both parties inside the working day.

Which is ahead, Istanbul or JST?

Istanbul is 6 hours ahead of JST. When it is 12:00 PM in Istanbul it is 6:00 PM in JST.

Do Istanbul and JST use different time zones?

Istanbul (Turkey) uses TRT at UTC+03:00, while JST uses JST at UTC+09:00. The IANA identifiers are Europe/Istanbul and Asia/Tokyo.

Does daylight saving time affect the Istanbul–JST difference?

Neither zone observes daylight saving time, so the +6h offset between Istanbul and JST 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 JST?

Not normally. The +6h gap only pushes the date over for late-evening times.

What is the time difference between Istanbul and JST?

JST 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 JST in?

JST operates on its local timezone.

What are the business hours in Istanbul?

Standard business hours in Istanbul are 9:00 AM - 6:00 PM TRT.

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 JST timezone?

Major cities in the JST timezone include Tokyo, Osaka, Yokohama, Nagoya, Sapporo, Kyoto, Kobe, Fukuoka.

What is the UTC offset for JST?

Japan Standard Time (JST) is at UTC+09:00.

What should I know about the JST timezone?

Japan does not observe daylight saving time. Tokyo is the most populous metropolitan area in the world.

When is it midnight in Istanbul, what time is it in JST?

When it is 12:00 AM (midnight) in Istanbul (TRT), it is +6h later in JST (JST).

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