IST to Buenos Aires
India is 8 hours and 30 minutes ahead of Buenos Aires.
Times may vary due to daylight saving time.Quick answer. Buenos Aires is 8 hours and 30 minutes behind IST, and that gap never changes. Neither IST nor Buenos Aires 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.
Buenos Aires, Argentina
ART UTC-3:00 No DST
Buenos Aires and the rest of Argentina.
no DST
IST to Buenos Aires 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 | Buenos Aires | 24-hour |
|---|---|---|
| 12 AM | 3:30 PM −1 day | 15:30 |
| 1 AM | 4:30 PM −1 day | 16:30 |
| 2 AM | 5:30 PM −1 day | 17:30 |
| 3 AM | 6:30 PM −1 day | 18:30 |
| 4 AM | 7:30 PM −1 day | 19:30 |
| 5 AM | 8:30 PM −1 day | 20:30 |
| 6 AM | 9:30 PM −1 day | 21:30 |
| 7 AM | 10:30 PM −1 day | 22:30 |
| 8 AM | 11:30 PM −1 day | 23:30 |
| 9 AM | 12:30 AM | 00:30 |
| 10 AM | 1:30 AM | 01:30 |
| 11 AM | 2:30 AM | 02:30 |
| 12 PM | 3:30 AM | 03:30 |
| 1 PM | 4:30 AM | 04:30 |
| 2 PM | 5:30 AM | 05:30 |
| 3 PM | 6:30 AM | 06:30 |
| 4 PM | 7:30 AM | 07:30 |
| 5 PM | 8:30 AM | 08:30 |
| 6 PM | 9:30 AM | 09:30 |
| 7 PM | 10:30 AM | 10:30 |
| 8 PM | 11:30 AM | 11:30 |
| 9 PM | 12:30 PM | 12:30 |
| 10 PM | 1:30 PM | 13:30 |
| 11 PM | 2:30 PM | 14:30 |
No row is highlighted because a standard 9–6 day in IST never overlaps a 9–5 day in Buenos Aires — see the meeting section below for the closest workable slots.
Popular conversion times
| IST | Buenos Aires |
|---|---|
| 9 AM IST | 12:30 AM |
| 10 AM IST | 1:30 AM |
| 11 AM IST | 2:30 AM |
| 12 PM IST | 3:30 AM |
| 3 PM IST | 6:30 AM |
| 5 PM IST | 8:30 AM |
| 6 PM IST | 9:30 AM |
| 8 PM IST | 11:30 AM |
Business hours and meeting times
Comparing a 9:00–18:00 working day in IST against 9:00–17:00 in Buenos Aires, 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.
No standard overlap
A 9–6 day in IST never meets a 9–5 day in Buenos Aires on any day of the week, so one side has to move outside normal hours. Ranked by how far outside:
- 5 PM IST = 8:30 AM Buenos Aires — needs about 30 minutes of stretch
- 4 PM IST = 7:30 AM Buenos Aires — needs roughly 1 hour and 30 minutes of stretch
- 3 PM IST = 6:30 AM Buenos Aires — well outside normal hours — 2 hours and 30 minutes beyond
These hold on every shared working day (5 a week). Teams working this gap regularly tend to alternate which side takes the early or late call, and keep the synchronous meeting short.
Public holidays
A shared working day is only usable if neither side is on holiday — and India and Buenos Aires 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 |
| Monday, October 12, 2026 | Buenos Aires | Day of Respect for Cultural Diversity (Día del Respeto a la Diversidad Cultural) |
| Tuesday, October 20, 2026 | India | Dussehra (Vijayadashami) |
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 Buenos Aires
- Monday, October 12, 2026Day of Respect for Cultural Diversity (Día del Respeto a la Diversidad Cultural)published date
- Monday, November 23, 2026National Sovereignty Day (Día de la Soberanía Nacional)published date
- Tuesday, December 8, 2026Immaculate Conception Day (Día de la Inmaculada Concepción de María)published date
- Friday, December 25, 2026Christmas Day (Navidad)published date
- Friday, January 1, 2027New Year's Day (Año Nuevo)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 Buenos Aires 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.
no DST
Frequently asked questions
What is the time difference between IST and Buenos Aires?
Buenos Aires is 8 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 Buenos Aires?
9:00 AM IST is 12:30 AM in Buenos Aires, all year round.
What is the best time for a meeting between IST and Buenos Aires?
Standard working days do not overlap at all in this pair, so somebody has to stretch. The closest slot is 5 PM IST / 8:30 AM Buenos Aires — it needs about 30 minutes of stretch. Teams that meet regularly across this gap usually alternate who takes the awkward end.
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 Buenos Aires comes entirely from the other side.
How many hours a week do IST and Buenos Aires actually overlap?
None at standard hours. A 9–6 day in IST does not meet a 9–5 day in Buenos Aires on any day of the week, so a recurring call means one side works early or late — the section above ranks the least disruptive options.
Do public holidays in IST and Buenos Aires 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 Buenos Aires is Day of Respect for Cultural Diversity (Día del Respeto a la Diversidad Cultural) on 2026-10-12. Indian, Gulf and Western holiday calendars are built on different systems, so the days each side loses rarely coincide.
Is IST ahead of Buenos Aires?
Yes. IST runs ahead of Buenos Aires by 8 hours and 30 minutes, so a working morning in IST lands the previous evening or night in Buenos Aires.
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 Argentina: IST to Argentina.