JST to AWST
-1hJST
JSTSOURCEAWST
AWSTGreen rows indicate typical business hours (9 AM - 5 PM)
JST and AWST on the World Map
The map below highlights the JST (Japan Standard Time) and AWST (Australian Western 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.
AWST – Australian Western Standard Time
UTC+08:00Australian Western Standard Time (AWST) is the time zone for Western Australia, 8 hours ahead of UTC.
- •Western Australia does not observe daylight saving time.
- •Perth is the most isolated major city in the world.
- •AWST is the same offset as China Standard Time and Singapore Time.
Time Conversion Guide: JST to AWST
JST runs on Japan Standard Time (JST) at UTC+09:00. AWST runs on Australian Western Standard Time (AWST) at UTC+08:00. That puts JST 1 hour behind AWST — a difference of -1h at the current offsets.
In practice, when it is 9:00 AM in JST it is 8:00 AM in AWST. Midnight in JST is 11:00 PM in AWST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
JST to AWST time conversion table
| JST (JST) | AWST (AWST) | 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 AWST time
- Scheduling a call from JST to AWST: a 10:00 AM start in JST lands at 9:00 AM in AWST, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both JST and AWST are inside the 9-to-5 working day between 10:00 AM and 5:00 PM JST time (9:00 AM–4:00 PM AWST). That is roughly 7 hours of usable overlap.
- Watching a live event or market open: JST viewers need 8:00 AM in AWST to catch a 9:00 AM start there, and 1:00 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 -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 AWST 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 AWST (Australian Western Standard Time)
Australian Western Standard Time (AWST) is used in Western Australia. WA does not observe daylight saving time, having rejected it in multiple referendums. Perth is the most remote major city in the world.
Best time to call between JST and AWST
Both JST and AWST 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 AWST. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
JST and AWST 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 AWST (JST UTC+09:00 → AWST 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 AWST?
JST (JST, UTC+09:00) is 1 hour behind AWST (AWST, UTC+08:00). The gap is currently -1h.
How do I convert JST time to AWST time?
Add -1h to JST local time. For example, 9:00 AM in JST is 8:00 AM in AWST.
What time is it in AWST right now?
AWST uses AWST 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 AWST from JST?
Call between 10:00 AM and 5:00 PM JST — that maps to 9:00 AM–4:00 PM AWST and keeps both parties inside the working day.
Which is behind, JST or AWST?
JST is 1 hour behind AWST. When it is 12:00 PM in JST it is 11:00 AM in AWST.
Does daylight saving time affect the JST–AWST difference?
Neither zone observes daylight saving time, so the -1h offset between JST and AWST 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 AWST?
Not normally. The -1h gap only pushes the date over the previous day.
What is the time difference between JST and AWST?
AWST is -1h from JST.
What timezone is JST in?
JST operates on its local timezone.
What timezone is AWST in?
AWST 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 AWST timezone?
Major cities in the AWST timezone include Perth, Mandurah, Bunbury, Geraldton.
What is the UTC offset for AWST?
Australian Western Standard Time (AWST) is at UTC+08:00.
What should I know about the AWST timezone?
Western Australia does not observe daylight saving time. Perth is the most isolated major city in the world.
When is it midnight in JST, what time is it in AWST?
When it is 12:00 AM (midnight) in JST (JST), it is -1h later in AWST (AWST).
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