IST to Istanbul
India is 2 hours and 30 minutes ahead of Istanbul.
Times may vary due to daylight saving time.Quick answer. Istanbul is 2 hours and 30 minutes behind IST, and that gap never changes. Neither IST nor Istanbul observes daylight saving time, so the same conversion is correct on every date of the year.
Time difference
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.
Istanbul, Turkey
TRT UTC+3:00 No DST
Istanbul and the rest of Turkey.
UTC+3 year-round, no DST
IST to Istanbul conversion table
Every hour of the day for 2026. Neither side observes daylight saving, so this table is correct on every date of the year.
| IST | Istanbul | 24-hour |
|---|---|---|
| 12 AM | 9:30 PM −1 day | 21:30 |
| 1 AM | 10:30 PM −1 day | 22:30 |
| 2 AM | 11:30 PM −1 day | 23:30 |
| 3 AM | 12:30 AM | 00:30 |
| 4 AM | 1:30 AM | 01:30 |
| 5 AM | 2:30 AM | 02:30 |
| 6 AM | 3:30 AM | 03:30 |
| 7 AM | 4:30 AM | 04:30 |
| 8 AM | 5:30 AM | 05:30 |
| 9 AM | 6:30 AM | 06:30 |
| 10 AM | 7:30 AM | 07:30 |
| 11 AM | 8:30 AM | 08:30 |
| 12 PM | 9:30 AM | 09:30 |
| 1 PM | 10:30 AM | 10:30 |
| 2 PM | 11:30 AM | 11:30 |
| 3 PM | 12:30 PM | 12:30 |
| 4 PM | 1:30 PM | 13:30 |
| 5 PM | 2:30 PM | 14:30 |
| 6 PM | 3:30 PM | 15:30 |
| 7 PM | 4:30 PM | 16:30 |
| 8 PM | 5:30 PM | 17:30 |
| 9 PM | 6:30 PM | 18:30 |
| 10 PM | 7:30 PM | 19:30 |
| 11 PM | 8:30 PM | 20:30 |
Highlighted rows are the 6 hours where a 9–6 working day in IST overlaps a 9–5 working day in Istanbul.
Popular conversion times
| IST | Istanbul |
|---|---|
| 9 AM IST | 6:30 AM |
| 10 AM IST | 7:30 AM |
| 11 AM IST | 8:30 AM |
| 12 PM IST | 9:30 AM |
| 3 PM IST | 12:30 PM |
| 5 PM IST | 2:30 PM |
| 6 PM IST | 3:30 PM |
| 8 PM IST | 5:30 PM |
Business hours and meeting times
Comparing a 9:00–18:00 working day in IST against 9:00–17:00 in Istanbul, 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 IST. Columns are hours of the IST day.
Best recurring slot
1 PM IST = 10:30 AM Istanbul , every shared working day
Across the week that is 30 overlapping working hours . The widest day is Monday, with 6 hours.
| Day | Overlap (IST) | Local (Istanbul) | Hours |
|---|---|---|---|
| Monday | 12 PM – 6 PM | 9:30 AM – 3:30 PM | 6 |
| Tuesday | 12 PM – 6 PM | 9:30 AM – 3:30 PM | 6 |
| Wednesday | 12 PM – 6 PM | 9:30 AM – 3:30 PM | 6 |
| Thursday | 12 PM – 6 PM | 9:30 AM – 3:30 PM | 6 |
| Friday | 12 PM – 6 PM | 9:30 AM – 3:30 PM | 6 |
| Saturday | IST weekend | — | — |
| Sunday | IST weekend | — | — |
Public holidays
A shared working day is only usable if neither side is on holiday — and India and Istanbul build their calendars on different systems, so the days each loses rarely coincide.
Over the next 8 weeks you share 40 working days. 3are lost to a public holiday on one side or the other, leaving 37.
| Date | Who is off | Holiday |
|---|---|---|
| Friday, October 2, 2026 | India | Gandhi Jayanti |
| Tuesday, October 20, 2026 | India | Dussehra (Vijayadashami) |
| Thursday, October 29, 2026 | Istanbul | Republic Day (Cumhuriyet Bayramı) |
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.
Next holidays in Istanbul
- Thursday, October 29, 2026Republic Day (Cumhuriyet Bayramı)published date
- Friday, January 1, 2027New Year's Day (Yılbaşı)published date
- Wednesday, March 10, 2027Eid al-Fitr First Day (Tentative Date) (Ramazan Bayramı 1. Gün (Tentative Date))published date
- Thursday, March 11, 2027Eid al-Fitr Second Day (Tentative Date) (Ramazan Bayramı 2. Gün (Tentative Date))published date
- Friday, March 12, 2027Eid al-Fitr Third Day (Tentative Date) (Ramazan Bayramı 3. Gün (Tentative Date))published date
Public holidays as published by https://date.nager.at, covering 2026–2028. Regional and employer-specific days are not included.
Holiday dates for Istanbul 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
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.
UTC+3 year-round, no DST
Frequently asked questions
What is the time difference between IST and Istanbul?
Istanbul is 2 hours and 30 minutes behind IST, on every date of the year. Neither side observes daylight saving time.
What time is 9 AM IST in Istanbul?
9:00 AM IST is 6:30 AM in Istanbul, all year round.
What is the best time for a meeting between IST and Istanbul?
Working days overlap for about 6 hours on a typical Monday: 12 PM to 6 PM IST, which is 9:30 AM to 3:30 PM in Istanbul. For a recurring invite, 1 PM IST / 10:30 AM Istanbul is the slot that works on the most days.
Does India observe daylight saving time?
No. India has kept a single UTC+5:30 offset since 1945 and does not use daylight saving time, so IST reads the same on every date of the year. Any change in the gap to Istanbul comes entirely from the other side.
How many hours a week do IST and Istanbul actually overlap?
30 hours across the week, spread over 5 working days. 1 PM IST (10:30 AM Istanbul) is the slot that works on the most days, so it is the one to put in a recurring invite.
Do public holidays in IST and Istanbul line up?
Barely. Over the next eight weeks the two sides share 40 working days, and 3 of those are a public holiday on one side or the other, leaving 37. The next holiday in Istanbul is Republic Day (Cumhuriyet Bayramı) on 2026-10-29. Indian, Gulf and Western holiday calendars are built on different systems, so the days each side loses rarely coincide.
Is IST ahead of Istanbul?
Yes. IST runs ahead of Istanbul by 2 hours and 30 minutes, so a working morning in IST lands the previous evening or night in Istanbul.
Converting the other way
Looking up times starting from Istanbul? Use the Istanbul to IST converter, which leads with Istanbul as the starting point and is written for that reader.
Related converters
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- IST to GMT · Greenwich Mean Time
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