JST to Nairobi
-6hJST
JSTSOURCENairobi
EATGreen rows indicate typical business hours (9 AM - 5 PM)
JST and EAT on the World Map
The map below highlights the JST (Japan Standard Time) and EAT (East Africa Time) timezone regions across the globe.
JST – Japan Standard Time
UTC+09:00Japan Standard Time (JST) is the time zone for Japan, 9 hours ahead of UTC.
- •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.
EAT – East Africa Time
UTC+03:00East Africa Time (EAT) is the time zone for East Africa, 3 hours ahead of UTC.
- •Nairobi is a major tech hub in Africa, often called 'Silicon Savannah'.
- •Ethiopia uses its own calendar, which is 7-8 years behind the Gregorian calendar.
- •EAT is the same offset as MSK (Moscow Time).
About Nairobi
WikipediaNairobi operates on East Africa Time (EAT), UTC+3. As the tech hub of Africa (Silicon Savannah), Nairobi leads African fintech and mobile innovation.
Nairobi National Park is the only national park within a capital city, with lions visible against the skyline.
JST to Nairobi Time Difference – Complete Guide
JST runs on Japan Standard Time (JST) at UTC+09:00. Nairobi runs on East Africa Time (EAT) at UTC+03:00. That puts JST 6 hours behind Nairobi — a difference of -6h at the current offsets.
In practice, when it is 9:00 AM in JST it is 3:00 AM in Nairobi. Midnight in JST is 6:00 PM in Nairobi. Neither zone observes daylight saving time, so the offset between them stays constant all year.
JST to Nairobi time conversion table
| JST (JST) | Nairobi (EAT) | Day |
|---|---|---|
| 12:00 AM | 6:00 PM | previous day |
| 6:00 AM | 12:00 AM | same day |
| 7:00 AM | 1:00 AM | same day |
| 8:00 AM | 2:00 AM | same day |
| 9:00 AM | 3:00 AM | same day |
| 12:00 PM | 6:00 AM | same day |
| 3:00 PM | 9:00 AM | same day |
| 5:00 PM | 11:00 AM | same day |
| 6:00 PM | 12:00 PM | same day |
| 9:00 PM | 3:00 PM | same day |
Why people convert JST to Nairobi time
- Scheduling a call from JST to Nairobi: a 10:00 AM start in JST lands at 4:00 AM in Nairobi, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both JST and Nairobi are inside the 9-to-5 working day between 3:00 PM and 5:00 PM JST time (9:00 AM–11:00 AM EAT). That is roughly 2 hours of usable overlap.
- Watching a live event or market open: JST viewers need 3:00 AM in Nairobi to catch a 9:00 AM start there, and 6:00 AM if the event is anchored to JST.
- Always state the zone abbreviation, not just the hour. "3:00 PM JST" is unambiguous; "3 PM" across a -6h gap is not.
- Block 3:00 PM–5:00 PM JST as the recurring meeting window if you work primarily from JST and need Nairobi colleagues present.
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.
About EAT (East Africa Time)
East Africa Time (EAT) is used in the countries of East Africa including Kenya, Ethiopia, Tanzania, Uganda, and others. EAT does not observe daylight saving time and shares the same offset as Moscow Standard Time (MSK).
Best time to call between JST and Nairobi
Both JST and Nairobi sit inside the 9 AM – 5 PM working day between 3:00 PM–5:00 PM JST, which is 9:00 AM–11:00 AM EAT. That gives roughly 2 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
JST and Nairobi overlap for about 2 hours during the working day — enough for meetings if you avoid the edges of the window.
JST is 6 hours behind Nairobi (JST UTC+09:00 → EAT UTC+03:00). The shared working window is 3:00 PM–5:00 PM JST. 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 JST and Nairobi?
JST (JST, UTC+09:00) is 6 hours behind Nairobi (EAT, UTC+03:00). The gap is currently -6h.
How do I convert JST time to Nairobi time?
Add -6h to JST local time. For example, 9:00 AM in JST is 3:00 AM in Nairobi.
What time is it in Nairobi right now?
Nairobi uses EAT at UTC+03:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -6h offset from JST.
What is the best time to call Nairobi from JST?
Call between 3:00 PM and 5:00 PM JST — that maps to 9:00 AM–11:00 AM EAT and keeps both parties inside the working day.
Which is behind, JST or Nairobi?
JST is 6 hours behind Nairobi. When it is 12:00 PM in JST it is 6:00 AM in Nairobi.
Do JST and Nairobi use different time zones?
JST uses JST at UTC+09:00, while Nairobi (Kenya) uses EAT at UTC+03:00. The IANA identifiers are Asia/Tokyo and Africa/Nairobi.
Does daylight saving time affect the JST–Nairobi difference?
Neither zone observes daylight saving time, so the -6h offset between JST and Nairobi is fixed all year.
Which other cities share JST's time zone?
JST also covers Tokyo, Osaka, Yokohama, Nagoya, Sapporo, Kyoto, Kobe, Fukuoka and 1 more.
Which countries use JST, JST's zone?
JST is used in Japan.
Is there a day difference between JST and Nairobi?
Not normally. The -6h gap only pushes the date over the previous day.
What is the time difference between JST and Nairobi?
Nairobi is -6h from JST.
What timezone is JST in?
JST operates on its local timezone.
What timezone is Nairobi in?
Nairobi operates on East Africa Time (EAT), UTC+3. As the tech hub of Africa (Silicon Savannah), Nairobi leads African fintech and mobile innovation.
What are the business hours in Nairobi?
Standard business hours in Nairobi are 8:00 AM - 5:00 PM EAT.
Which countries use JST (Japan Standard Time)?
JST is used in Japan.
Does JST observe daylight saving time?
No, JST does not observe daylight saving time and remains at UTC+09:00 year-round.
What are some interesting facts about JST?
Japan does not observe daylight saving time. Tokyo is the most populous metropolitan area in the world.
Which cities are in the EAT timezone?
Major cities in the EAT timezone include Nairobi, Addis Ababa, Dar es Salaam, Kampala, Mogadishu, Antananarivo.
What is the UTC offset for EAT?
East Africa Time (EAT) is at UTC+03:00.
What should I know about the EAT timezone?
Nairobi is a major tech hub in Africa, often called 'Silicon Savannah'. Ethiopia uses its own calendar, which is 7-8 years behind the Gregorian calendar.
When is it midnight in JST, what time is it in Nairobi?
When it is 12:00 AM (midnight) in JST (JST), it is -6h later in Nairobi (EAT).
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