Sydney to IST
Sydney is 4 hours and 30 minutes ahead of India Standard Time.
Times may vary due to daylight saving time.Quick answer. IST is 5 hours and 30 minutes behind Sydney for part of the year and 4 hours and 30 minutes behind for the rest, because Sydney observes daylight saving time and the other side does not. The gap is 5 hours and 30 minutes during Sydney's standard-time months and 4 hours and 30 minutes during daylight time, so always convert against a specific date.
Time difference
Sydney, Australia
AEST UTC+10:00 AEDT UTC+11:00 Observes DST
Sydney and the rest of Australia.
- ↓ April 5, 2026 clocks back at 2:00 AM · UTC+11:00 → UTC+10:00
- ↑ October 4, 2026 clocks forward at 3:00 AM · UTC+10:00 → UTC+11:00
AEST/AEDT
India Standard Time (IST)
IST UTC+5:30 No DST
Mumbai, Delhi, Bengaluru, Chennai, Kolkata, Hyderabad.
India runs on a single time zone, UTC+5:30, and has not observed daylight saving time since 1945. The half-hour offset is why IST conversions rarely land on a round hour.
Sydney to IST conversion table
Every hour of the day for 2026. Because Sydney changes clocks twice a year, these values shift by an hour across the daylight saving boundary — use the date picker above for a specific day.
| Sydney | IST | 24-hour |
|---|---|---|
| 12 AM | 7:30 PM −1 day | 19:30 |
| 1 AM | 8:30 PM −1 day | 20:30 |
| 2 AM | 9:30 PM −1 day | 21:30 |
| 3 AM | 10:30 PM −1 day | 22:30 |
| 4 AM | 11:30 PM −1 day | 23:30 |
| 5 AM | 12:30 AM | 00:30 |
| 6 AM | 1:30 AM | 01:30 |
| 7 AM | 2:30 AM | 02:30 |
| 8 AM | 3:30 AM | 03:30 |
| 9 AM | 4:30 AM | 04:30 |
| 10 AM | 5:30 AM | 05:30 |
| 11 AM | 6:30 AM | 06:30 |
| 12 PM | 7:30 AM | 07:30 |
| 1 PM | 8:30 AM | 08:30 |
| 2 PM | 9:30 AM | 09:30 |
| 3 PM | 10:30 AM | 10:30 |
| 4 PM | 11:30 AM | 11:30 |
| 5 PM | 12:30 PM | 12:30 |
| 6 PM | 1:30 PM | 13:30 |
| 7 PM | 2:30 PM | 14:30 |
| 8 PM | 3:30 PM | 15:30 |
| 9 PM | 4:30 PM | 16:30 |
| 10 PM | 5:30 PM | 17:30 |
| 11 PM | 6:30 PM | 18:30 |
Highlighted rows are the 4 hours where a 9–6 working day in Sydney overlaps a 9–5 working day in IST.
Popular conversion times
| Sydney | IST |
|---|---|
| 9 AM Sydney | 4:30 AM |
| 10 AM Sydney | 5:30 AM |
| 11 AM Sydney | 6:30 AM |
| 12 PM Sydney | 7:30 AM |
| 3 PM Sydney | 10:30 AM |
| 5 PM Sydney | 12:30 PM |
| 6 PM Sydney | 1:30 PM |
| 8 PM Sydney | 3:30 PM |
Business hours and meeting times
Comparing a 9:00–18:00 working day in Sydney against 9:00–17:00 in IST, across the whole week — a slot only counts if it lands on a working day at both ends.
Both sides work Monday to Friday, so the working weeks line up and you share 5 days.
Rows are days in Sydney. Columns are hours of the Sydney day.
Best recurring slot
2 PM Sydney = 9:30 AM IST , every shared working day
Across the week that is 20 overlapping working hours . The widest day is Monday, with 4 hours.
| Day | Overlap (Sydney) | Local (IST) | Hours |
|---|---|---|---|
| Monday | 2 PM – 6 PM | 9:30 AM – 1:30 PM | 4 |
| Tuesday | 2 PM – 6 PM | 9:30 AM – 1:30 PM | 4 |
| Wednesday | 2 PM – 6 PM | 9:30 AM – 1:30 PM | 4 |
| Thursday | 2 PM – 6 PM | 9:30 AM – 1:30 PM | 4 |
| Friday | 2 PM – 6 PM | 9:30 AM – 1:30 PM | 4 |
| Saturday | Sydney weekend | — | — |
| Sunday | Sydney weekend | — | — |
Public holidays
A shared working day is only usable if neither side is on holiday — and India and IST build their calendars on different systems, so the days each loses rarely coincide.
Over the next 8 weeks you share 40 working days. 6are lost to a public holiday on one side or the other, leaving 34.
| Date | Who is off | Holiday |
|---|---|---|
| Friday, September 25, 2026 | Sydney | Friday before AFL Grand Final |
| Monday, September 28, 2026 | Sydney | King's Birthday |
| Friday, October 2, 2026 | India | Gandhi Jayanti |
| Monday, October 5, 2026 | Sydney | Labour Day / King's Birthday |
| Tuesday, October 20, 2026 | India | Dussehra (Vijayadashami) |
| Tuesday, November 3, 2026 | Sydney | Melbourne Cup |
Next holidays in Sydney
- Friday, September 25, 2026Friday before AFL Grand Finalregionalpublished date
- Monday, September 28, 2026King's Birthdayregionalpublished date
- Monday, October 5, 2026Labour Day / King's Birthdayregionalpublished date
- Tuesday, November 3, 2026Melbourne Cupregionalpublished date
- Friday, December 25, 2026Christmas Daypublished date
Public holidays as published by https://date.nager.at, covering 2026–2028. Regional and employer-specific days are not included.
Next holidays in India
- Friday, October 2, 2026Gandhi Jayantisame date every year
- Tuesday, October 20, 2026Dussehra (Vijayadashami)partialpublished date
- Sunday, November 8, 2026Diwalipublished date
- Monday, November 9, 2026Diwalipublished date
- Friday, December 25, 2026Christmas Daypartialsame date every year
India has three national holidays on which the whole country closes. Everything else is either a central-government gazetted holiday that individual employers choose to observe, or a state holiday. Festival dates follow lunisolar calendars and move every year, so they are listed explicitly rather than derived.
Holiday dates for Sydney and elsewhere come from a dataset last refreshed on 2026-09-12 (date.nager.at plus curated national calendars). Lunar dates — Eid, Chinese New Year, the Jewish holidays — are predicted and can move by a day once officially announced. Regional, state and employer-specific holidays are not included. Confirm anything you are booking a flight around.
About this conversion
AEST/AEDT
India runs on a single time zone, UTC+5:30, and has not observed daylight saving time since 1945. The half-hour offset is why IST conversions rarely land on a round hour.
Frequently asked questions
What is the time difference between Sydney and IST?
It depends on the date. IST is 5 hours and 30 minutes behind Sydney in January and 4 hours and 30 minutes behind in July, because Sydney changes clocks for daylight saving time. Use the converter above with the date you actually need.
What time is 9 AM Sydney in IST?
9:00 AM Sydney is 3:30 AM in IST during IST, and 4:30 AM during daylight time. The table on this page lists all 24 hours for the date you pick.
What is the best time for a meeting between Sydney and IST?
Working days overlap for about 4 hours on a typical Monday: 2 PM to 6 PM Sydney, which is 9:30 AM to 1:30 PM in IST. For a recurring invite, 2 PM Sydney / 9:30 AM IST is the slot that works on the most days.
Does Sydney observe daylight saving time?
Yes. Sydney alternates between AEST (UTC+10:00) and AEDT (UTC+11:00). In 2026, clocks in Sydney go forward on October 4, 2026 and back on April 5, 2026. India does not shift at all, so the gap between the two moves twice a year.
When do the clocks change in Sydney?
In 2026, clocks in Sydney go forward on October 4, 2026 and back on April 5, 2026. Between those dates the gap from India is 4 hours and 30 minutes; outside them it is 5 hours and 30 minutes.
Why does the Sydney–IST difference change during the year?
Because Sydney switches between AEST (UTC+10:00) and AEDT (UTC+11:00) for daylight saving, while the other side does not move. A converter that assumes one fixed gap will be an hour wrong for roughly half the year.
How many hours a week do Sydney and IST actually overlap?
20 hours across the week, spread over 5 working days. 2 PM Sydney (9:30 AM IST) is the slot that works on the most days, so it is the one to put in a recurring invite.
Do public holidays in Sydney and IST line up?
Barely. Over the next eight weeks the two sides share 40 working days, and 6 of those are a public holiday on one side or the other, leaving 34. The next holiday in IST is Gandhi Jayanti on 2026-10-02. Indian, Gulf and Western holiday calendars are built on different systems, so the days each side loses rarely coincide.
Is Sydney ahead of IST?
Yes. Sydney runs ahead of IST — by 4 hours and 30 minutes or 5 hours and 30 minutes depending on the season, so a working morning in Sydney lands the previous evening or night in IST.
Converting the other way
Looking up times starting from IST? Use the IST to Sydney converter, which leads with IST as the starting point and is written for that reader.
Other cities in Australia
- IST to Melbourne · Australia
- IST to Brisbane · Australia
- IST to Perth · Australia
Related converters
- IST to EST · Eastern Time
- IST to CST · Central Time
- IST to PST · Pacific Time
- IST to UTC · Coordinated Universal Time
- IST to GMT · Greenwich Mean Time
- IST to CET · Central European Time
- IST to GST · Gulf Standard Time
- IST to MST · Mountain Time
All cities in Australia: IST to Australia. Scheduling repeatedly? Best Meeting Times: India and Australia compares several cities at once.