JST to AEDT Time Converter

When it is 9:00 AM JST, it is 10:00 AM AEDT. Australian Eastern Daylight Time (AEDT, UTC+11) is 2 hours ahead of Japan Standard Time (JST, UTC+9). Your working-hours overlap window is 9:00 AM–3:00 PM JST (11:00 AM–5:00 PM AEDT).

JST to AEDT Conversion Table

Major Cities Using JST and AEDT

Japan Standard Time (JST): Tokyo, Osaka, Kyoto, Yokohama.

Australian Eastern Daylight Time (AEDT): Sydney, Melbourne, Brisbane (AEST only), Canberra.

How many hours between JST and AEDT?

JST is UTC+9 and AEDT is UTC+11, a difference of 2 hours. AEDT is ahead of JST. This difference can shift by an hour in either direction during Daylight Saving Time transitions — if one zone observes DST and the other doesn't, the offset narrows or widens for part of the year.

Business Hours Overlap: JST ↔ AEDT

Assuming a 9:00 AM – 5:00 PM workday on each side, your working-hours overlap window is 9:00 am–3:00 pm jst (11:00 am–5:00 pm aedt). To visualize this instantly for any pair of cities, use the visual meeting planner or the timezone overlap finder — both highlight the green overlap window on a live timeline.

Does JST observe Daylight Saving Time?

Japan Standard Time (JST) is based on the Asia/Tokyo IANA timezone. DST observance depends on the jurisdiction — for example, most of the continental US switches between standard and daylight time, while India, Japan, and most of Southeast Asia do not observe DST at all. WorldClock.lol uses the authoritative IANA timezone database, so every conversion automatically accounts for the correct DST rules on the date you're converting.

When is 9 AM JST in AEDT?

When it is 9:00 AM in Japan Standard Time (JST, UTC+9), it is 10:00 AM in Australian Eastern Daylight Time (AEDT). For other times of day, scan the conversion table above or drop into the interactive converter to pick an exact minute. The converter handles both standard and daylight variants correctly.

How to Use This JST to AEDT Converter

1. Type or drag any time in the JST input above — the AEDT equivalent updates instantly.
2. Check the day indicator. When the converted time crosses midnight, the tool shows +1 day or −1 day so you don't book a meeting on the wrong date.
3. Copy the shareable URL to send the specific conversion to a colleague — the link preserves your exact selection.
4. Switch directions by swapping the input zones, or open AEDT to JST for the reverse.

Related JST Converters

• JST to EST
• JST to PST
• JST to GMT
• JST to UTC
• JST to IST
• JST to CET

Related AEDT Converters

• EST to AEDT
• PST to AEDT
• GMT to AEDT
• UTC to AEDT
• IST to AEDT
• CET to AEDT

More Time Tools

• All Time Zone Converters — browse every supported pair
• About JST (Japan Standard Time) — current time, cities, DST rules
• About AEDT (Australian Eastern Daylight Time) — current time, cities, DST rules
• Meeting Planner — find the best time for a multi-city meeting
• Best Time to Call — optimal calling windows between any two cities
• UTC Time Now — the reference point for every conversion
• DST Schedule 2026 — every daylight-saving transition this year