IST to Bangkok
India is 1 hour and 30 minutes behind Bangkok.
Times may vary due to daylight saving time.Quick answer. Bangkok is 1 hour and 30 minutes ahead of IST, and that gap never changes. Neither IST nor Bangkok 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.
Bangkok, Thailand
ICT UTC+7:00 No DST
Bangkok and the rest of Thailand.
no DST
IST to Bangkok 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 | Bangkok | 24-hour |
|---|---|---|
| 12 AM | 1:30 AM | 01:30 |
| 1 AM | 2:30 AM | 02:30 |
| 2 AM | 3:30 AM | 03:30 |
| 3 AM | 4:30 AM | 04:30 |
| 4 AM | 5:30 AM | 05:30 |
| 5 AM | 6:30 AM | 06:30 |
| 6 AM | 7:30 AM | 07:30 |
| 7 AM | 8:30 AM | 08:30 |
| 8 AM | 9:30 AM | 09:30 |
| 9 AM | 10:30 AM | 10:30 |
| 10 AM | 11:30 AM | 11:30 |
| 11 AM | 12:30 PM | 12:30 |
| 12 PM | 1:30 PM | 13:30 |
| 1 PM | 2:30 PM | 14:30 |
| 2 PM | 3:30 PM | 15:30 |
| 3 PM | 4:30 PM | 16:30 |
| 4 PM | 5:30 PM | 17:30 |
| 5 PM | 6:30 PM | 18:30 |
| 6 PM | 7:30 PM | 19:30 |
| 7 PM | 8:30 PM | 20:30 |
| 8 PM | 9:30 PM | 21:30 |
| 9 PM | 10:30 PM | 22:30 |
| 10 PM | 11:30 PM | 23:30 |
| 11 PM | 12:30 AM +1 day | 00:30 |
Highlighted rows are the 7 hours where a 9–6 working day in IST overlaps a 9–5 working day in Bangkok.
Popular conversion times
| IST | Bangkok |
|---|---|
| 9 AM IST | 10:30 AM |
| 10 AM IST | 11:30 AM |
| 11 AM IST | 12:30 PM |
| 12 PM IST | 1:30 PM |
| 3 PM IST | 4:30 PM |
| 5 PM IST | 6:30 PM |
| 6 PM IST | 7:30 PM |
| 8 PM IST | 9:30 PM |
Business hours and meeting times
Comparing a 9:00–18:00 working day in IST against 9:00–17:00 in Bangkok, 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 = 2:30 PM Bangkok , 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 (Bangkok) | Hours |
|---|---|---|---|
| Monday | 9 AM – 3 PM | 10:30 AM – 4:30 PM | 6 |
| Tuesday | 9 AM – 3 PM | 10:30 AM – 4:30 PM | 6 |
| Wednesday | 9 AM – 3 PM | 10:30 AM – 4:30 PM | 6 |
| Thursday | 9 AM – 3 PM | 10:30 AM – 4:30 PM | 6 |
| Friday | 9 AM – 3 PM | 10:30 AM – 4:30 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 Bangkok build their calendars on different systems, so the days each loses rarely coincide.
Over the next 8 weeks you share 40 working days. 4are lost to a public holiday on one side or the other, leaving 36.
| Date | Who is off | Holiday |
|---|---|---|
| Friday, October 2, 2026 | India | Gandhi Jayanti |
| Tuesday, October 13, 2026 | Bangkok | Passing of King Bhumibol |
| Tuesday, October 20, 2026 | India | Dussehra (Vijayadashami) |
| Friday, October 23, 2026 | Bangkok | Chulalongkorn Day |
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 Bangkok
- Tuesday, October 13, 2026Passing of King Bhumibolsame date every year
- Friday, October 23, 2026Chulalongkorn Daysame date every year
- Saturday, December 5, 2026King Bhumibol's Birthdaysame date every year
- Thursday, December 10, 2026Constitution Daysame date every year
- Thursday, December 31, 2026New Year's Evesame date every year
Thai public holidays. Buddhist holy days follow the lunar calendar and are not included.
Holiday dates for India 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 Bangkok?
Bangkok is 1 hour and 30 minutes ahead of IST, on every date of the year. Neither side observes daylight saving time.
What time is 9 AM IST in Bangkok?
9:00 AM IST is 10:30 AM in Bangkok, all year round.
What is the best time for a meeting between IST and Bangkok?
Working days overlap for about 6 hours on a typical Monday: 9 AM to 3 PM IST, which is 10:30 AM to 4:30 PM in Bangkok. For a recurring invite, 1 PM IST / 2:30 PM Bangkok 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 Bangkok comes entirely from the other side.
How many hours a week do IST and Bangkok actually overlap?
30 hours across the week, spread over 5 working days. 1 PM IST (2:30 PM Bangkok) 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 Bangkok line up?
Barely. Over the next eight weeks the two sides share 40 working days, and 4 of those are a public holiday on one side or the other, leaving 36. The next holiday in Bangkok is Passing of King Bhumibol on 2026-10-13. Indian, Gulf and Western holiday calendars are built on different systems, so the days each side loses rarely coincide.
Is IST ahead of Bangkok?
No, it is the other way around: Bangkok is ahead of IST by 1 hour and 30 minutes.
Converting the other way
Looking up times starting from Bangkok? Use the Bangkok to IST converter, which leads with Bangkok as the starting point and is written for that reader.
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