JST to ICT
-2hJST
JSTSOURCEICT
ICTGreen rows indicate typical business hours (9 AM - 5 PM)
JST and ICT on the World Map
The map below highlights the JST (Japan Standard Time) and ICT (Indochina 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.
ICT – Indochina Time
UTC+07:00Indochina Time (ICT) is the time zone for Vietnam, Thailand, Laos, and Cambodia, 7 hours ahead of UTC.
- •Bangkok is one of the most visited cities in the world.
- •ICT is 12 hours ahead of EST.
- •Thailand, Vietnam, and Cambodia all share ICT.
Comparing Time Zones: JST and ICT
JST runs on Japan Standard Time (JST) at UTC+09:00. ICT runs on Indochina Time (ICT) at UTC+07:00. That puts JST 2 hours behind ICT — a difference of -2h at the current offsets.
In practice, when it is 9:00 AM in JST it is 7:00 AM in ICT. Midnight in JST is 10:00 PM in ICT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
JST to ICT time conversion table
| JST (JST) | ICT (ICT) | Day |
|---|---|---|
| 12:00 AM | 10:00 PM | previous day |
| 6:00 AM | 4:00 AM | same day |
| 7:00 AM | 5:00 AM | same day |
| 8:00 AM | 6:00 AM | same day |
| 9:00 AM | 7:00 AM | same day |
| 12:00 PM | 10:00 AM | same day |
| 3:00 PM | 1:00 PM | same day |
| 5:00 PM | 3:00 PM | same day |
| 6:00 PM | 4:00 PM | same day |
| 9:00 PM | 7:00 PM | same day |
Why people convert JST to ICT time
- Scheduling a call from JST to ICT: a 10:00 AM start in JST lands at 8:00 AM in ICT, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both JST and ICT are inside the 9-to-5 working day between 11:00 AM and 5:00 PM JST time (9:00 AM–3:00 PM ICT). That is roughly 6 hours of usable overlap.
- Watching a live event or market open: JST viewers need 7:00 AM in ICT to catch a 9:00 AM start there, and 2:00 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 -2h gap is not.
- Block 11:00 AM–5:00 PM JST as the recurring meeting window if you work primarily from JST and need ICT 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 ICT (Indochina Time)
Indochina Time (ICT) is used across Southeast Asia including Vietnam, Thailand, Laos, and Cambodia. Indonesia (Western time, WIB) also uses UTC+07:00. ICT does not observe daylight saving time.
Best time to call between JST and ICT
Both JST and ICT sit inside the 9 AM – 5 PM working day between 11:00 AM–5:00 PM JST, which is 9:00 AM–3:00 PM ICT. That gives roughly 6 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
JST and ICT share 6 hours of working-hours overlap (11:00 AM–5:00 PM JST), so scheduling a live meeting is straightforward.
JST is 2 hours behind ICT (JST UTC+09:00 → ICT UTC+07:00). The shared working window is 11:00 AM–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 ICT?
JST (JST, UTC+09:00) is 2 hours behind ICT (ICT, UTC+07:00). The gap is currently -2h.
How do I convert JST time to ICT time?
Add -2h to JST local time. For example, 9:00 AM in JST is 7:00 AM in ICT.
What time is it in ICT right now?
ICT uses ICT at UTC+07:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -2h offset from JST.
What is the best time to call ICT from JST?
Call between 11:00 AM and 5:00 PM JST — that maps to 9:00 AM–3:00 PM ICT and keeps both parties inside the working day.
Which is behind, JST or ICT?
JST is 2 hours behind ICT. When it is 12:00 PM in JST it is 10:00 AM in ICT.
Does daylight saving time affect the JST–ICT difference?
Neither zone observes daylight saving time, so the -2h offset between JST and ICT 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 ICT?
Not normally. The -2h gap only pushes the date over the previous day.
What is the time difference between JST and ICT?
ICT is -2h from JST.
What timezone is JST in?
JST operates on its local timezone.
What timezone is ICT in?
ICT 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 ICT timezone?
Major cities in the ICT timezone include Bangkok, Ho Chi Minh City, Hanoi, Jakarta, Phnom Penh, Vientiane.
What is the UTC offset for ICT?
Indochina Time (ICT) is at UTC+07:00.
What should I know about the ICT timezone?
Bangkok is one of the most visited cities in the world. ICT is 12 hours ahead of EST.
When is it midnight in JST, what time is it in ICT?
When it is 12:00 AM (midnight) in JST (JST), it is -2h later in ICT (ICT).
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See every conversion from JST →·See every conversion from ICT →