IST to AEDT Converter & Meeting Planner
Quick answer: 9:00 AM IST = 2:30 PM AEDT (fixed +05:30 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Indian Standard Time (IST) and Australian Eastern Daylight Time (AEDT)? You need to account for the standard time difference. Australian Eastern Daylight Time is normally 5.5 hours ahead of Indian Standard Time. Whether you are coordinating between teams in Mumbai and New Delhi and Sydney and Melbourne, our live tool has you covered. Use our interactive overlap studio below to find the perfect waking hours for both regions, taking into account any seasonal Daylight Saving Time (DST) changes.
24-Hour Conversion Table
Quick reference: 12:00 AM IST = 5:30 AM AEDT. The full 24-hour IST to AEDT table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM IST = 8:30 PM AEDT.
| IST Time | AEDT Time |
|---|---|
| 12:00 AM (00:00) | 5:30 AM (05:30) |
| 1:00 AM (01:00) | 6:30 AM (06:30) |
| 2:00 AM (02:00) | 7:30 AM (07:30) |
| 3:00 AM (03:00) | 8:30 AM (08:30) |
| 4:00 AM (04:00) | 9:30 AM (09:30) |
| 5:00 AM (05:00) | 10:30 AM (10:30) |
| 6:00 AM (06:00) | 11:30 AM (11:30) |
| 7:00 AM (07:00) | 12:30 PM (12:30) |
| 8:00 AM (08:00) | 1:30 PM (13:30) |
| 9:00 AM (09:00) | 2:30 PM (14:30) |
| 10:00 AM (10:00) | 3:30 PM (15:30) |
| 11:00 AM (11:00) | 4:30 PM (16:30) |
| 12:00 PM (12:00) | 5:30 PM (17:30) |
| 1:00 PM (13:00) | 6:30 PM (18:30) |
| 2:00 PM (14:00) | 7:30 PM (19:30) |
| 3:00 PM (15:00) | 8:30 PM (20:30) |
| 4:00 PM (16:00) | 9:30 PM (21:30) |
| 5:00 PM (17:00) | 10:30 PM (22:30) |
| 6:00 PM (18:00) | 11:30 PM (23:30) |
| 7:00 PM (19:00) | 12:30 AM (00:30)+1 day |
| 8:00 PM (20:00) | 1:30 AM (01:30)+1 day |
| 9:00 PM (21:00) | 2:30 AM (02:30)+1 day |
| 10:00 PM (22:00) | 3:30 AM (03:30)+1 day |
| 11:00 PM (23:00) | 4:30 AM (04:30)+1 day |
Best time to call Sydney from Mumbai
For most work calls, compare the normal business day in Mumbai (IST) with the business day in Sydney (AEDT). IST commonly covers South Asia, while AEDT is mainly associated with Oceania, Eastern Australia.
⚠️ Note: 2026-07-05 is not a normal workday in one or both regions based on their configured calendar. The overlap below should be treated as a reference, not a guaranteed office-hours window.
✅ The most practical overlap on 2026-07-05 is usually 9:30 AM - 12:30 PM IST, which corresponds to 2:00 PM - 5:00 PM AEDT. This window sits inside the typical IST workday (9:30 AM - 6:30 PM) and the AEDT workday (9:00 AM - 5:00 PM).
- DST Safety: IST or AEDT may shift during Daylight Saving Time. Always confirm the converted time for your specific date.
- Bombay Stock Exchange (BSE): 09:15-15:30 local time in Mumbai.
- Australian Securities Exchange (ASX): 10:00-16:00 local time in Sydney.
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Frequently Asked Questions
What is the time difference between IST and AEDT?
During standard time, Australian Eastern Daylight Time is 5.5 hours ahead of Indian Standard Time.
Does India observe Daylight Saving Time (DST)?
India does not observe Daylight Saving Time and has not done so since 1945. IST remains fixed at UTC+5:30 every day of the year, meaning the offset between India and any DST-observing country shifts by one hour twice annually when those countries change their clocks.
Why does IST have a 30-minute offset?
India chose the 82.5° East meridian — which passes through Mirzapur in Uttar Pradesh — as its central reference longitude, as it bisects the subcontinent geographically. That meridian sits exactly 5 hours and 30 minutes ahead of the Prime Meridian in Greenwich, producing the UTC+5:30 offset that has defined IST since 1906.
When does AEDT start and end?
AEDT begins on the first Sunday in October at 02:00 local time, when clocks spring forward one hour from AEST (UTC+10) to AEDT (UTC+11). It ends on the first Sunday in April at 03:00 local time, when clocks fall back to AEST. In 2026, AEDT starts on October 4 and ends on April 5 — following the Southern Hemisphere summer calendar, which runs opposite to DST schedules in Europe and North America.
Is Brisbane on AEDT?
No — Queensland, including Brisbane, does not observe Daylight Saving Time and remains on AEST (UTC+10) year-round. During the AEDT period from October through April, Sydney and Melbourne advance to UTC+11 while Brisbane stays at UTC+10, creating a one-hour gap between cities that share nearly the same longitude and are otherwise in the same time zone for the other six months of the year.