SGT to JST
+1hSGT
SGTSOURCEJST
JSTGreen rows indicate typical business hours (9 AM - 5 PM)
SGT and JST on the World Map
The map below highlights the SGT (Singapore Standard Time) and JST (Japan Standard Time) timezone regions across the globe.
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.
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 to JST Time Difference – Complete Guide
SGT runs on Singapore Standard Time (SGT) at UTC+08:00. JST runs on Japan Standard Time (JST) at UTC+09:00. That puts SGT 1 hour ahead of JST — a difference of +1h at the current offsets.
In practice, when it is 9:00 AM in SGT it is 10:00 AM in JST. Midnight in SGT is 1:00 AM in JST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
SGT to JST time conversion table
| SGT (SGT) | JST (JST) | Day |
|---|---|---|
| 12:00 AM | 1:00 AM | same day |
| 6:00 AM | 7:00 AM | same day |
| 7:00 AM | 8:00 AM | same day |
| 8:00 AM | 9:00 AM | same day |
| 9:00 AM | 10:00 AM | same day |
| 12:00 PM | 1:00 PM | same day |
| 3:00 PM | 4:00 PM | same day |
| 5:00 PM | 6:00 PM | same day |
| 6:00 PM | 7:00 PM | same day |
| 9:00 PM | 10:00 PM | same day |
Why people convert SGT to JST time
- Scheduling a call from SGT to JST: a 10:00 AM start in SGT lands at 11:00 AM in JST, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both SGT and JST are inside the 9-to-5 working day between 9:00 AM and 4:00 PM SGT time (10:00 AM–5:00 PM JST). That is roughly 7 hours of usable overlap.
- Coordinating a SGT-based team with JST contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.
- Always state the zone abbreviation, not just the hour. "3:00 PM SGT" is unambiguous; "3 PM" across a +1h gap is not.
- Block 9:00 AM–4:00 PM SGT as the recurring meeting window if you work primarily from SGT and need JST colleagues present.
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.
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 SGT and JST
Both SGT and JST sit inside the 9 AM – 5 PM working day between 9:00 AM–4:00 PM SGT, which is 10:00 AM–5:00 PM JST. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
SGT and JST share 7 hours of working-hours overlap (9:00 AM–4:00 PM SGT), so scheduling a live meeting is straightforward.
SGT is 1 hour ahead of JST (SGT UTC+08:00 → JST UTC+09:00). The shared working window is 9:00 AM–4:00 PM SGT. 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 SGT and JST?
SGT (SGT, UTC+08:00) is 1 hour ahead of JST (JST, UTC+09:00). The gap is currently +1h.
How do I convert SGT time to JST time?
Add +1h to SGT local time. For example, 9:00 AM in SGT is 10:00 AM 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 +1h offset from SGT.
What is the best time to call JST from SGT?
Call between 9:00 AM and 4:00 PM SGT — that maps to 10:00 AM–5:00 PM JST and keeps both parties inside the working day.
Which is ahead, SGT or JST?
SGT is 1 hour ahead of JST. When it is 12:00 PM in SGT it is 1:00 PM in JST.
Does daylight saving time affect the SGT–JST difference?
Neither zone observes daylight saving time, so the +1h offset between SGT and JST is fixed all year.
Which other cities share SGT's time zone?
SGT also covers Singapore.
Which countries use SGT, SGT's zone?
SGT is used in Singapore.
Is there a day difference between SGT and JST?
Not normally. The +1h gap only pushes the date over for late-evening times.
What is the time difference between SGT and JST?
JST is +1h from SGT.
What timezone is SGT in?
SGT operates on its local timezone.
What timezone is JST in?
JST operates on its local timezone.
Which countries use SGT (Singapore Standard Time)?
SGT is used in Singapore.
Does SGT observe daylight saving time?
No, SGT does not observe daylight saving time and remains at UTC+08:00 year-round.
What are some interesting facts about SGT?
Singapore uses UTC+08:00 despite being at about 104°E longitude (closer to UTC+07:00). Singapore does not observe daylight saving time.
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 SGT, what time is it in JST?
When it is 12:00 AM (midnight) in SGT (SGT), it is +1h later in JST (JST).
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