JST to CET
-8hJST
JSTSOURCECET
CETGreen rows indicate typical business hours (9 AM - 5 PM)
JST and CET on the World Map
The map below highlights the JST (Japan Standard Time) and CET (Central European 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.
CET – Central European Time
UTC+01:00Central European Time (CET) is used across most of Western and Central Europe, 1 hour ahead of UTC.
- •CET covers more European countries than any other time zone.
- •Spain uses CET despite being geographically aligned with GMT/WET.
- •The Frankfurt Stock Exchange, Euronext (Amsterdam/Paris), and Borsa Italiana operate on CET.
- •Over 500 million people live in the CET time zone.
- •France moved to CET during the German occupation in WWII and never switched back.
Comparing Time Zones: JST and CET
JST runs on Japan Standard Time (JST) at UTC+09:00. CET runs on Central European Time (CET) at UTC+01:00. That puts JST 8 hours behind CET — a difference of -8h at the current offsets.
In practice, when it is 9:00 AM in JST it is 1:00 AM in CET. Midnight in JST is 4:00 PM in CET. Neither zone observes daylight saving time, so the offset between them stays constant all year.
JST to CET time conversion table
| JST (JST) | CET (CET) | Day |
|---|---|---|
| 12:00 AM | 4:00 PM | previous day |
| 6:00 AM | 10:00 PM | previous day |
| 7:00 AM | 11:00 PM | previous day |
| 8:00 AM | 12:00 AM | same day |
| 9:00 AM | 1:00 AM | same day |
| 12:00 PM | 4:00 AM | same day |
| 3:00 PM | 7:00 AM | same day |
| 5:00 PM | 9:00 AM | same day |
| 6:00 PM | 10:00 AM | same day |
| 9:00 PM | 1:00 PM | same day |
Why people convert JST to CET time
- Scheduling a call from JST to CET: a 10:00 AM start in JST lands at 2:00 AM in CET, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -8h gap: JST and CET have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in CET is 1:00 AM in JST.
- Keeping family and friends in sync: knowing that 8:00 PM in JST is 12:00 PM in CET makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM JST" is unambiguous; "3 PM" across a -8h gap is not.
- With a -8h gap there is no shared 9-to-5 window, so alternate the early start: one week JST takes the early slot, the next week CET does.
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 CET (Central European Time)
Central European Time (CET) is the standard time zone for most of Europe, covering over 30 countries from Spain to Poland, and from Norway to Italy. CET is 1 hour ahead of GMT and is used by the European Union's most populous nations. During summer, most CET countries switch to Central European Summer Time (CEST, UTC+02:00). Major European financial markets in Frankfurt, Paris, and Amsterdam operate on CET.
Best time to call between JST and CET
With a -8h offset there is no overlap inside a normal 9 AM – 5 PM day. CET opens at 9:00 AM CET, which is 1:00 AM in JST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
JST and CET have no shared working hours because of the -8h gap. Teams need to alternate early starts or rely on asynchronous handovers.
JST is 8 hours behind CET (JST UTC+09:00 → CET UTC+01:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
JST
Does not observe DST
CET
☀ Currently in DST
Standard: UTC+01:00 · DST: UTC+02:00
Clocks fall back on Sun, Oct 25, 2026
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 CET?
JST (JST, UTC+09:00) is 8 hours behind CET (CET, UTC+01:00). The gap is currently -8h.
How do I convert JST time to CET time?
Add -8h to JST local time. For example, 9:00 AM in JST is 1:00 AM in CET.
What time is it in CET right now?
CET uses CET at UTC+01:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -8h offset from JST.
What is the best time to call CET from JST?
There is no shared working-hours window because of the -8h gap. The closest option is 1:00 PM in JST, which is 5:00 AM in CET.
Which is behind, JST or CET?
JST is 8 hours behind CET. When it is 12:00 PM in JST it is 4:00 AM in CET.
Does daylight saving time affect the JST–CET difference?
Neither zone observes daylight saving time, so the -8h offset between JST and CET 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 CET?
Not normally. The -8h gap only pushes the date over the previous day.
What is the time difference between JST and CET?
CET is -8h from JST.
What timezone is JST in?
JST operates on its local timezone.
What timezone is CET in?
CET operates on its local timezone.
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 CET timezone?
Major cities in the CET timezone include Paris, Berlin, Rome, Madrid, Amsterdam, Brussels, Vienna, Warsaw.
What is the UTC offset for CET?
Central European Time (CET) is at UTC+01:00. During daylight saving time, it shifts to CEST.
What should I know about the CET timezone?
CET covers more European countries than any other time zone. Spain uses CET despite being geographically aligned with GMT/WET.
When is it midnight in JST, what time is it in CET?
When it is 12:00 AM (midnight) in JST (JST), it is -8h later in CET (CET).
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See every conversion from JST →·See every conversion from CET →