India Standard Time (ist) is used in India. The IANA timezone identifier is Asia/Kolkata.

Australian Eastern Daylight Time (aedt) is used in Australia. The IANA timezone identifier is Australia/Sydney.

IST to AEDT Time Converter

India Standard Time → Australian Eastern Daylight Time

IST = UTC+5:30AEDT = UTC+10

⚠️ IST is ambiguous — on this page it means India Standard Time. It also refers to:

Ireland Standard Time (Dublin) → AEDT ↗Israel Standard Time (Jerusalem) → AEDT ↗

ClockinSync

BASE

09:00

Work Clients Team +

00:0006:0012:0018:0024:00

AEDT (Sydney)

Australia · +4.5h

13:30

London

United Kingdom · -4.5h

04:30

New York

USA · -9.5h

23:30-1 day

Tokyo

Japan · +3.5h

12:30

Dubai

United Arab Emirates · -1.5h

07:30

IST (Mumbai) ↔ AEDT (Sydney) — time offset

IST (Mumbai) is 5 hours 30 minutes behind AEDT (Sydney). Midday in IST (Mumbai) lines up with 16:00 in AEDT (Sydney).

IST (Mumbai) observes Asia/Kolkata and AEDT (Sydney) observes Australia/Sydney — a 4.5 hours 30 minutes gap between them.

Mutual working hours

There is a 3.5-hour window each day where both IST (Mumbai) and AEDT (Sydney) are within standard business hours (09:00–17:00).

00:0006:0012:0018:0024:00

IST (Mumbai)

AEDT (Sydney)

Overlap (3.5h)

Optimal meeting slots

IST (Mumbai) and AEDT (Sydney) share 3.5 hours of business hours overlap daily. Showing the 3 most balanced slots — see the time table below for the full window.

09:00 Mumbai / 13:00 Sydney✓ Both working

10:00 Mumbai / 14:00 Sydney✓ Both working

11:00 Mumbai / 15:00 Sydney✓ Both working

Assumes a standard 9 AM–5 PM workday in each location's local timezone.

Upcoming public holidays

IST (Mumbai)

No upcoming public holidays this year.

AEDT (Sydney)7 holidays

Aug 3Picnic Day

Sep 28King's Birthday

Oct 5Labour Day

Oct 5King's Birthday

Nov 3Melbourne Cup

How to work with IST (Mumbai) and AEDT (Sydney) time zones

Coordinating between IST (Mumbai) (India) and AEDT (Sydney) (Australia) means working around a 4.5-hour time difference. The 3.5-hour overlap window gives both teams a natural slot for real-time collaboration without anyone working outside normal hours.

💡 How to schedule across these time zones

✅

Schedule at 09:00–10:00 (IST (Mumbai)) for a 13:00–14:00 slot in AEDT (Sydney) — the sweet spot where both teams are working.

✅

Schedule at 10:00–11:00 (IST (Mumbai)) for a 14:00–15:00 slot in AEDT (Sydney) — the sweet spot where both teams are working.

✅

Schedule at 11:00–12:00 (IST (Mumbai)) for a 15:00–16:00 slot in AEDT (Sydney) — the sweet spot where both teams are working.

Recurring meetings are particularly vulnerable to DST shifts. The ClockinSync Chrome Extension alerts you before the offset changes.

Install ClockinSync Free →

Drag the slider at the top to convert any IST (Mumbai) time instantly. You can also type natural language like "3pm", "15:00", or a location name to get an immediate answer.

IST (Mumbai) ↔ AEDT (Sydney)

4h of business hours overlap daily (09:00–17:00)

IST (Mumbai)

AEDT (Sydney)

00:00

04:30

01:00

05:30

02:00

06:30

03:00

07:30

04:00

08:30

05:00

09:30Working

06:00

10:30Working

07:00

11:30Working

08:00

12:30Working

09:00Working

13:30Working

10:00Working

14:30Working

11:00Working

15:30Working

12:00Working

16:30Working

13:00Working

17:30off

14:00Working

18:30off

15:00Working

19:30off

16:00Working

20:30off

17:00

21:30

18:00

22:30

19:00

23:30

20:00

00:30+1d

21:00

01:30+1d

22:00

02:30+1d

23:00

03:30+1d

Working hours: 09:00–17:00 local. Green = both working. Purple = one side only.

Frequently Asked Questions

What is the difference between ist and aedt?

India Standard Time (ist) is UTC+5:30 and Australian Eastern Daylight Time (aedt) is UTC+10. The difference between them is 4.5 hours.

Where is ist used?

India Standard Time (ist) is used in India and surrounding regions. The IANA timezone identifier is Asia/Kolkata. Note: ist is ambiguous and may refer to other timezones.

Where is aedt used?

Australian Eastern Daylight Time (aedt) is used in Australia and surrounding regions. The IANA timezone identifier is Australia/Sydney.

How do I convert ist to aedt?

Use the interactive converter above. Drag the time slider to any ist time and the aedt equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.

Popular IST conversions

IST → London IST → New York IST → Tokyo IST → Dubai IST → Sydney IST → Paris IST → Berlin IST → Singapore IST → Los Angeles IST → Toronto

Popular AEDT conversions

London → AEDT New York → AEDT Tokyo → AEDT Dubai → AEDT Paris → AEDT Berlin → AEDT Singapore → AEDT Los Angeles → AEDT Toronto → AEDT Mumbai → AEDT