JST to Singapore
-1hJST
JSTSOURCESingapore
SGTGreen rows indicate typical business hours (9 AM - 5 PM)
JST and SGT on the World Map
The map below highlights the JST (Japan Standard Time) and SGT (Singapore Standard 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.
SGT – Singapore Standard Time
UTC+08:00Singapore Standard Time (SGT) is the time zone for Singapore, 8 hours ahead of UTC.
- •Singapore uses UTC+08:00 despite being at about 104°E longitude (closer to UTC+07:00).
- •Singapore does not observe daylight saving time.
- •The Singapore Exchange (SGX) operates on SGT.
About Singapore
WikipediaSingapore Standard Time (SGT) is 8 hours ahead of GMT. As Asia's leading financial hub, Singapore bridges business hours between Europe and Australia.
The city-state has the world's highest percentage of millionaires, with 1 in 6 households.
JST to Singapore Time Difference – Complete Guide
JST runs on Japan Standard Time (JST) at UTC+09:00. Singapore runs on Singapore Standard Time (SGT) at UTC+08:00. That puts JST 1 hour behind Singapore — a difference of -1h at the current offsets.
In practice, when it is 9:00 AM in JST it is 8:00 AM in Singapore. Midnight in JST is 11:00 PM in Singapore. Neither zone observes daylight saving time, so the offset between them stays constant all year.
JST to Singapore time conversion table
| JST (JST) | Singapore (SGT) | Day |
|---|---|---|
| 12:00 AM | 11:00 PM | previous day |
| 6:00 AM | 5:00 AM | same day |
| 7:00 AM | 6:00 AM | same day |
| 8:00 AM | 7:00 AM | same day |
| 9:00 AM | 8:00 AM | same day |
| 12:00 PM | 11:00 AM | same day |
| 3:00 PM | 2:00 PM | same day |
| 5:00 PM | 4:00 PM | same day |
| 6:00 PM | 5:00 PM | same day |
| 9:00 PM | 8:00 PM | same day |
Why people convert JST to Singapore time
- Scheduling a call from JST to Singapore: a 10:00 AM start in JST lands at 9:00 AM in Singapore, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both JST and Singapore are inside the 9-to-5 working day between 10:00 AM and 5:00 PM JST time (9:00 AM–4:00 PM SGT). That is roughly 7 hours of usable overlap.
- Booking travel or deliveries: tracking Singapore local time against JST keeps pickup windows and arrival estimates honest across the -1h offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM JST" is unambiguous; "3 PM" across a -1h gap is not.
- Block 10:00 AM–5:00 PM JST as the recurring meeting window if you work primarily from JST and need Singapore 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 SGT (Singapore Standard Time)
Singapore Standard Time (SGT) is used in Singapore year-round. Singapore does not observe daylight saving time. Despite being geographically close to the UTC+07:00 zone, Singapore uses UTC+08:00 to align with major trading partners like China, Hong Kong, and Malaysia. Singapore is a major global financial hub.
Best time to call between JST and Singapore
Both JST and Singapore sit inside the 9 AM – 5 PM working day between 10:00 AM–5:00 PM JST, which is 9:00 AM–4:00 PM SGT. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
JST and Singapore share 7 hours of working-hours overlap (10:00 AM–5:00 PM JST), so scheduling a live meeting is straightforward.
JST is 1 hour behind Singapore (JST UTC+09:00 → SGT UTC+08:00). The shared working window is 10:00 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 Singapore?
JST (JST, UTC+09:00) is 1 hour behind Singapore (SGT, UTC+08:00). The gap is currently -1h.
How do I convert JST time to Singapore time?
Add -1h to JST local time. For example, 9:00 AM in JST is 8:00 AM in Singapore.
What time is it in Singapore right now?
Singapore uses SGT at UTC+08:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -1h offset from JST.
What is the best time to call Singapore from JST?
Call between 10:00 AM and 5:00 PM JST — that maps to 9:00 AM–4:00 PM SGT and keeps both parties inside the working day.
Which is behind, JST or Singapore?
JST is 1 hour behind Singapore. When it is 12:00 PM in JST it is 11:00 AM in Singapore.
Do JST and Singapore use different time zones?
JST uses JST at UTC+09:00, while Singapore (Singapore) uses SGT at UTC+08:00. The IANA identifiers are Asia/Tokyo and Asia/Singapore.
Does daylight saving time affect the JST–Singapore difference?
Neither zone observes daylight saving time, so the -1h offset between JST and Singapore 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 Singapore?
Not normally. The -1h gap only pushes the date over the previous day.
What is the time difference between JST and Singapore?
Singapore is -1h from JST.
What timezone is JST in?
JST operates on its local timezone.
What timezone is Singapore in?
Singapore Standard Time (SGT) is 8 hours ahead of GMT. As Asia's leading financial hub, Singapore bridges business hours between Europe and Australia.
What are the business hours in Singapore?
Standard business hours in Singapore are 9:00 AM - 6:00 PM SGT.
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 SGT timezone?
Major cities in the SGT timezone include Singapore.
What is the UTC offset for SGT?
Singapore Standard Time (SGT) is at UTC+08:00.
What should I know about the SGT timezone?
Singapore uses UTC+08:00 despite being at about 104°E longitude (closer to UTC+07:00). Singapore does not observe daylight saving time.
When is it midnight in JST, what time is it in Singapore?
When it is 12:00 AM (midnight) in JST (JST), it is -1h later in Singapore (SGT).
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